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kernel/rcutorture.c
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/* |
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* Read-Copy Update module-based torture test facility |
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* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
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* Copyright (C) IBM Corporation, 2005, 2006 |
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* * Authors: Paul E. McKenney <paulmck@us.ibm.com> |
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* Josh Triplett <josh@freedesktop.org> |
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* * See also: Documentation/RCU/torture.txt */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/kthread.h> #include <linux/err.h> #include <linux/spinlock.h> #include <linux/smp.h> #include <linux/rcupdate.h> #include <linux/interrupt.h> #include <linux/sched.h> |
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#include <linux/atomic.h> |
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#include <linux/bitops.h> |
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#include <linux/completion.h> #include <linux/moduleparam.h> #include <linux/percpu.h> #include <linux/notifier.h> |
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#include <linux/reboot.h> |
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#include <linux/freezer.h> |
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#include <linux/cpu.h> |
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#include <linux/delay.h> |
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#include <linux/stat.h> |
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#include <linux/srcu.h> |
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#include <linux/slab.h> |
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#include <asm/byteorder.h> |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Paul E. McKenney <paulmck@us.ibm.com> and " |
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"Josh Triplett <josh@freedesktop.org>"); |
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static int nreaders = -1; /* # reader threads, defaults to 2*ncpus */ |
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static int nfakewriters = 4; /* # fake writer threads */ |
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static int stat_interval; /* Interval between stats, in seconds. */ |
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/* Defaults to "only at end of test". */ |
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static int verbose; /* Print more debug info. */ static int test_no_idle_hz; /* Test RCU's support for tickless idle CPUs. */ |
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static int shuffle_interval = 3; /* Interval between shuffles (in sec)*/ static int stutter = 5; /* Start/stop testing interval (in sec) */ |
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static int irqreader = 1; /* RCU readers from irq (timers). */ |
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static int fqs_duration; /* Duration of bursts (us), 0 to disable. */ static int fqs_holdoff; /* Hold time within burst (us). */ |
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static int fqs_stutter = 3; /* Wait time between bursts (s). */ |
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static int onoff_interval; /* Wait time between CPU hotplugs, 0=disable. */ |
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static int shutdown_secs; /* Shutdown time (s). <=0 for no shutdown. */ |
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static int test_boost = 1; /* Test RCU prio boost: 0=no, 1=maybe, 2=yes. */ static int test_boost_interval = 7; /* Interval between boost tests, seconds. */ static int test_boost_duration = 4; /* Duration of each boost test, seconds. */ |
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static char *torture_type = "rcu"; /* What RCU implementation to torture. */ |
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module_param(nreaders, int, 0444); |
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MODULE_PARM_DESC(nreaders, "Number of RCU reader threads"); |
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module_param(nfakewriters, int, 0444); |
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MODULE_PARM_DESC(nfakewriters, "Number of RCU fake writer threads"); |
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module_param(stat_interval, int, 0644); |
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MODULE_PARM_DESC(stat_interval, "Number of seconds between stats printk()s"); |
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module_param(verbose, bool, 0444); |
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MODULE_PARM_DESC(verbose, "Enable verbose debugging printk()s"); |
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module_param(test_no_idle_hz, bool, 0444); |
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MODULE_PARM_DESC(test_no_idle_hz, "Test support for tickless idle CPUs"); |
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module_param(shuffle_interval, int, 0444); |
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MODULE_PARM_DESC(shuffle_interval, "Number of seconds between shuffles"); |
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module_param(stutter, int, 0444); MODULE_PARM_DESC(stutter, "Number of seconds to run/halt test"); |
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module_param(irqreader, int, 0444); MODULE_PARM_DESC(irqreader, "Allow RCU readers from irq handlers"); |
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module_param(fqs_duration, int, 0444); MODULE_PARM_DESC(fqs_duration, "Duration of fqs bursts (us)"); module_param(fqs_holdoff, int, 0444); MODULE_PARM_DESC(fqs_holdoff, "Holdoff time within fqs bursts (us)"); module_param(fqs_stutter, int, 0444); MODULE_PARM_DESC(fqs_stutter, "Wait time between fqs bursts (s)"); |
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module_param(onoff_interval, int, 0444); MODULE_PARM_DESC(onoff_interval, "Time between CPU hotplugs (s), 0=disable"); |
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module_param(shutdown_secs, int, 0444); MODULE_PARM_DESC(shutdown_secs, "Shutdown time (s), zero to disable."); |
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module_param(test_boost, int, 0444); MODULE_PARM_DESC(test_boost, "Test RCU prio boost: 0=no, 1=maybe, 2=yes."); module_param(test_boost_interval, int, 0444); MODULE_PARM_DESC(test_boost_interval, "Interval between boost tests, seconds."); module_param(test_boost_duration, int, 0444); MODULE_PARM_DESC(test_boost_duration, "Duration of each boost test, seconds."); |
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module_param(torture_type, charp, 0444); |
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MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu, rcu_bh, srcu)"); |
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#define TORTURE_FLAG "-torture:" |
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#define PRINTK_STRING(s) \ |
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do { printk(KERN_ALERT "%s" TORTURE_FLAG s " ", torture_type); } while (0) |
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#define VERBOSE_PRINTK_STRING(s) \ |
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do { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG s " ", torture_type); } while (0) |
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#define VERBOSE_PRINTK_ERRSTRING(s) \ |
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do { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "!!! " s " ", torture_type); } while (0) |
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static char printk_buf[4096]; static int nrealreaders; static struct task_struct *writer_task; |
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static struct task_struct **fakewriter_tasks; |
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static struct task_struct **reader_tasks; static struct task_struct *stats_task; |
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static struct task_struct *shuffler_task; |
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static struct task_struct *stutter_task; |
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static struct task_struct *fqs_task; |
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static struct task_struct *boost_tasks[NR_CPUS]; |
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static struct task_struct *shutdown_task; |
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#ifdef CONFIG_HOTPLUG_CPU static struct task_struct *onoff_task; #endif /* #ifdef CONFIG_HOTPLUG_CPU */ |
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#define RCU_TORTURE_PIPE_LEN 10 struct rcu_torture { struct rcu_head rtort_rcu; int rtort_pipe_count; struct list_head rtort_free; |
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int rtort_mbtest; |
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}; |
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static LIST_HEAD(rcu_torture_freelist); |
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static struct rcu_torture __rcu *rcu_torture_current; |
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static unsigned long rcu_torture_current_version; |
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static struct rcu_torture rcu_tortures[10 * RCU_TORTURE_PIPE_LEN]; static DEFINE_SPINLOCK(rcu_torture_lock); static DEFINE_PER_CPU(long [RCU_TORTURE_PIPE_LEN + 1], rcu_torture_count) = { 0 }; static DEFINE_PER_CPU(long [RCU_TORTURE_PIPE_LEN + 1], rcu_torture_batch) = { 0 }; static atomic_t rcu_torture_wcount[RCU_TORTURE_PIPE_LEN + 1]; |
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static atomic_t n_rcu_torture_alloc; static atomic_t n_rcu_torture_alloc_fail; static atomic_t n_rcu_torture_free; static atomic_t n_rcu_torture_mberror; static atomic_t n_rcu_torture_error; |
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static long n_rcu_torture_boost_ktrerror; static long n_rcu_torture_boost_rterror; |
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static long n_rcu_torture_boost_failure; static long n_rcu_torture_boosts; |
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static long n_rcu_torture_timers; |
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static long n_offline_attempts; static long n_offline_successes; static long n_online_attempts; static long n_online_successes; |
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static struct list_head rcu_torture_removed; |
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static cpumask_var_t shuffle_tmp_mask; |
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static int stutter_pause_test; |
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#if defined(MODULE) || defined(CONFIG_RCU_TORTURE_TEST_RUNNABLE) #define RCUTORTURE_RUNNABLE_INIT 1 #else #define RCUTORTURE_RUNNABLE_INIT 0 #endif int rcutorture_runnable = RCUTORTURE_RUNNABLE_INIT; |
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module_param(rcutorture_runnable, int, 0444); MODULE_PARM_DESC(rcutorture_runnable, "Start rcutorture at boot"); |
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#if defined(CONFIG_RCU_BOOST) && !defined(CONFIG_HOTPLUG_CPU) |
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#define rcu_can_boost() 1 |
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#else /* #if defined(CONFIG_RCU_BOOST) && !defined(CONFIG_HOTPLUG_CPU) */ |
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#define rcu_can_boost() 0 |
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#endif /* #else #if defined(CONFIG_RCU_BOOST) && !defined(CONFIG_HOTPLUG_CPU) */ |
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static unsigned long shutdown_time; /* jiffies to system shutdown. */ |
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static unsigned long boost_starttime; /* jiffies of next boost test start. */ DEFINE_MUTEX(boost_mutex); /* protect setting boost_starttime */ /* and boost task create/destroy. */ |
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/* Mediate rmmod and system shutdown. Concurrent rmmod & shutdown illegal! */ #define FULLSTOP_DONTSTOP 0 /* Normal operation. */ #define FULLSTOP_SHUTDOWN 1 /* System shutdown with rcutorture running. */ #define FULLSTOP_RMMOD 2 /* Normal rmmod of rcutorture. */ static int fullstop = FULLSTOP_RMMOD; |
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/* * Protect fullstop transitions and spawning of kthreads. */ static DEFINE_MUTEX(fullstop_mutex); |
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/* Forward reference. */ static void rcu_torture_cleanup(void); |
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/* |
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* Detect and respond to a system shutdown. |
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*/ static int rcutorture_shutdown_notify(struct notifier_block *unused1, unsigned long unused2, void *unused3) { |
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mutex_lock(&fullstop_mutex); |
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if (fullstop == FULLSTOP_DONTSTOP) |
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fullstop = FULLSTOP_SHUTDOWN; |
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else printk(KERN_WARNING /* but going down anyway, so... */ "Concurrent 'rmmod rcutorture' and shutdown illegal! "); |
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mutex_unlock(&fullstop_mutex); |
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return NOTIFY_DONE; } |
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/* |
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* Absorb kthreads into a kernel function that won't return, so that * they won't ever access module text or data again. */ static void rcutorture_shutdown_absorb(char *title) { if (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) { printk(KERN_NOTICE "rcutorture thread %s parking due to system shutdown ", title); schedule_timeout_uninterruptible(MAX_SCHEDULE_TIMEOUT); } } /* |
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* Allocate an element from the rcu_tortures pool. */ |
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static struct rcu_torture * |
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rcu_torture_alloc(void) { struct list_head *p; |
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spin_lock_bh(&rcu_torture_lock); |
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if (list_empty(&rcu_torture_freelist)) { atomic_inc(&n_rcu_torture_alloc_fail); |
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spin_unlock_bh(&rcu_torture_lock); |
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return NULL; } atomic_inc(&n_rcu_torture_alloc); p = rcu_torture_freelist.next; list_del_init(p); |
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spin_unlock_bh(&rcu_torture_lock); |
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return container_of(p, struct rcu_torture, rtort_free); } /* * Free an element to the rcu_tortures pool. */ static void rcu_torture_free(struct rcu_torture *p) { atomic_inc(&n_rcu_torture_free); |
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spin_lock_bh(&rcu_torture_lock); |
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list_add_tail(&p->rtort_free, &rcu_torture_freelist); |
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spin_unlock_bh(&rcu_torture_lock); |
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} |
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struct rcu_random_state { unsigned long rrs_state; |
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long rrs_count; |
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}; #define RCU_RANDOM_MULT 39916801 /* prime */ #define RCU_RANDOM_ADD 479001701 /* prime */ #define RCU_RANDOM_REFRESH 10000 #define DEFINE_RCU_RANDOM(name) struct rcu_random_state name = { 0, 0 } /* * Crude but fast random-number generator. Uses a linear congruential |
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* generator, with occasional help from cpu_clock(). |
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*/ |
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static unsigned long |
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rcu_random(struct rcu_random_state *rrsp) { |
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if (--rrsp->rrs_count < 0) { |
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rrsp->rrs_state += (unsigned long)local_clock(); |
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rrsp->rrs_count = RCU_RANDOM_REFRESH; } rrsp->rrs_state = rrsp->rrs_state * RCU_RANDOM_MULT + RCU_RANDOM_ADD; return swahw32(rrsp->rrs_state); } |
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static void |
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rcu_stutter_wait(char *title) |
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{ |
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while (stutter_pause_test || !rcutorture_runnable) { |
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if (rcutorture_runnable) schedule_timeout_interruptible(1); else |
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schedule_timeout_interruptible(round_jiffies_relative(HZ)); |
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rcutorture_shutdown_absorb(title); |
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} |
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} |
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/* |
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* Operations vector for selecting different types of tests. */ struct rcu_torture_ops { void (*init)(void); void (*cleanup)(void); int (*readlock)(void); |
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void (*read_delay)(struct rcu_random_state *rrsp); |
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void (*readunlock)(int idx); int (*completed)(void); |
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void (*deferred_free)(struct rcu_torture *p); |
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void (*sync)(void); |
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void (*cb_barrier)(void); |
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void (*fqs)(void); |
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int (*stats)(char *page); |
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int irq_capable; |
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int can_boost; |
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char *name; }; |
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static struct rcu_torture_ops *cur_ops; |
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/* * Definitions for rcu torture testing. */ |
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static int rcu_torture_read_lock(void) __acquires(RCU) |
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{ rcu_read_lock(); return 0; } |
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static void rcu_read_delay(struct rcu_random_state *rrsp) { |
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const unsigned long shortdelay_us = 200; const unsigned long longdelay_ms = 50; |
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/* We want a short delay sometimes to make a reader delay the grace * period, and we want a long delay occasionally to trigger * force_quiescent_state. */ |
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if (!(rcu_random(rrsp) % (nrealreaders * 2000 * longdelay_ms))) mdelay(longdelay_ms); if (!(rcu_random(rrsp) % (nrealreaders * 2 * shortdelay_us))) udelay(shortdelay_us); |
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#ifdef CONFIG_PREEMPT if (!preempt_count() && !(rcu_random(rrsp) % (nrealreaders * 20000))) preempt_schedule(); /* No QS if preempt_disable() in effect */ #endif |
b2896d2e7 [PATCH] srcu-3: a... |
352 |
} |
a49a4af75 [PATCH] rcu: add ... |
353 |
static void rcu_torture_read_unlock(int idx) __releases(RCU) |
72e9bb549 [PATCH] rcutortur... |
354 355 356 357 358 359 360 361 362 363 364 365 366 367 |
{ rcu_read_unlock(); } static int rcu_torture_completed(void) { return rcu_batches_completed(); } static void rcu_torture_cb(struct rcu_head *p) { int i; struct rcu_torture *rp = container_of(p, struct rcu_torture, rtort_rcu); |
c9d557c19 rcu: fix bug in r... |
368 |
if (fullstop != FULLSTOP_DONTSTOP) { |
72e9bb549 [PATCH] rcutortur... |
369 370 371 372 373 374 375 376 377 378 379 380 |
/* Test is ending, just drop callbacks on the floor. */ /* The next initialization will pick up the pieces. */ return; } i = rp->rtort_pipe_count; if (i > RCU_TORTURE_PIPE_LEN) i = RCU_TORTURE_PIPE_LEN; atomic_inc(&rcu_torture_wcount[i]); if (++rp->rtort_pipe_count >= RCU_TORTURE_PIPE_LEN) { rp->rtort_mbtest = 0; rcu_torture_free(rp); } else |
0acc512cb rcu: Add synchron... |
381 |
cur_ops->deferred_free(rp); |
72e9bb549 [PATCH] rcutortur... |
382 |
} |
d9a3da069 rcu: Add expedite... |
383 384 385 386 |
static int rcu_no_completed(void) { return 0; } |
72e9bb549 [PATCH] rcutortur... |
387 388 389 390 391 392 |
static void rcu_torture_deferred_free(struct rcu_torture *p) { call_rcu(&p->rtort_rcu, rcu_torture_cb); } static struct rcu_torture_ops rcu_ops = { |
0acc512cb rcu: Add synchron... |
393 394 395 396 397 398 399 400 401 |
.init = NULL, .cleanup = NULL, .readlock = rcu_torture_read_lock, .read_delay = rcu_read_delay, .readunlock = rcu_torture_read_unlock, .completed = rcu_torture_completed, .deferred_free = rcu_torture_deferred_free, .sync = synchronize_rcu, .cb_barrier = rcu_barrier, |
bf66f18e7 rcu: Add force_qu... |
402 |
.fqs = rcu_force_quiescent_state, |
0acc512cb rcu: Add synchron... |
403 |
.stats = NULL, |
a71fca58b rcu: Fix whitespa... |
404 |
.irq_capable = 1, |
8e8be45e8 rcu: add priority... |
405 |
.can_boost = rcu_can_boost(), |
a71fca58b rcu: Fix whitespa... |
406 |
.name = "rcu" |
72e9bb549 [PATCH] rcutortur... |
407 |
}; |
e30337365 [PATCH] rcu: refa... |
408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 |
static void rcu_sync_torture_deferred_free(struct rcu_torture *p) { int i; struct rcu_torture *rp; struct rcu_torture *rp1; cur_ops->sync(); list_add(&p->rtort_free, &rcu_torture_removed); list_for_each_entry_safe(rp, rp1, &rcu_torture_removed, rtort_free) { i = rp->rtort_pipe_count; if (i > RCU_TORTURE_PIPE_LEN) i = RCU_TORTURE_PIPE_LEN; atomic_inc(&rcu_torture_wcount[i]); if (++rp->rtort_pipe_count >= RCU_TORTURE_PIPE_LEN) { rp->rtort_mbtest = 0; list_del(&rp->rtort_free); rcu_torture_free(rp); } } } static void rcu_sync_torture_init(void) { INIT_LIST_HEAD(&rcu_torture_removed); } |
20d2e4283 [PATCH] rcu: add ... |
433 |
static struct rcu_torture_ops rcu_sync_ops = { |
0acc512cb rcu: Add synchron... |
434 435 436 437 438 439 440 441 442 |
.init = rcu_sync_torture_init, .cleanup = NULL, .readlock = rcu_torture_read_lock, .read_delay = rcu_read_delay, .readunlock = rcu_torture_read_unlock, .completed = rcu_torture_completed, .deferred_free = rcu_sync_torture_deferred_free, .sync = synchronize_rcu, .cb_barrier = NULL, |
bf66f18e7 rcu: Add force_qu... |
443 |
.fqs = rcu_force_quiescent_state, |
0acc512cb rcu: Add synchron... |
444 445 |
.stats = NULL, .irq_capable = 1, |
8e8be45e8 rcu: add priority... |
446 |
.can_boost = rcu_can_boost(), |
0acc512cb rcu: Add synchron... |
447 |
.name = "rcu_sync" |
20d2e4283 [PATCH] rcu: add ... |
448 |
}; |
d9a3da069 rcu: Add expedite... |
449 450 451 452 453 454 455 456 457 458 |
static struct rcu_torture_ops rcu_expedited_ops = { .init = rcu_sync_torture_init, .cleanup = NULL, .readlock = rcu_torture_read_lock, .read_delay = rcu_read_delay, /* just reuse rcu's version. */ .readunlock = rcu_torture_read_unlock, .completed = rcu_no_completed, .deferred_free = rcu_sync_torture_deferred_free, .sync = synchronize_rcu_expedited, .cb_barrier = NULL, |
bf66f18e7 rcu: Add force_qu... |
459 |
.fqs = rcu_force_quiescent_state, |
d9a3da069 rcu: Add expedite... |
460 461 |
.stats = NULL, .irq_capable = 1, |
8e8be45e8 rcu: add priority... |
462 |
.can_boost = rcu_can_boost(), |
d9a3da069 rcu: Add expedite... |
463 464 |
.name = "rcu_expedited" }; |
c32e06605 [PATCH] rcutortur... |
465 466 467 |
/* * Definitions for rcu_bh torture testing. */ |
a49a4af75 [PATCH] rcu: add ... |
468 |
static int rcu_bh_torture_read_lock(void) __acquires(RCU_BH) |
c32e06605 [PATCH] rcutortur... |
469 470 471 472 |
{ rcu_read_lock_bh(); return 0; } |
a49a4af75 [PATCH] rcu: add ... |
473 |
static void rcu_bh_torture_read_unlock(int idx) __releases(RCU_BH) |
c32e06605 [PATCH] rcutortur... |
474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 |
{ rcu_read_unlock_bh(); } static int rcu_bh_torture_completed(void) { return rcu_batches_completed_bh(); } static void rcu_bh_torture_deferred_free(struct rcu_torture *p) { call_rcu_bh(&p->rtort_rcu, rcu_torture_cb); } static struct rcu_torture_ops rcu_bh_ops = { |
0acc512cb rcu: Add synchron... |
489 490 491 492 493 494 495 |
.init = NULL, .cleanup = NULL, .readlock = rcu_bh_torture_read_lock, .read_delay = rcu_read_delay, /* just reuse rcu's version. */ .readunlock = rcu_bh_torture_read_unlock, .completed = rcu_bh_torture_completed, .deferred_free = rcu_bh_torture_deferred_free, |
bdf2a4364 rcu: Catch rcutor... |
496 |
.sync = synchronize_rcu_bh, |
0acc512cb rcu: Add synchron... |
497 |
.cb_barrier = rcu_barrier_bh, |
bf66f18e7 rcu: Add force_qu... |
498 |
.fqs = rcu_bh_force_quiescent_state, |
0acc512cb rcu: Add synchron... |
499 500 501 |
.stats = NULL, .irq_capable = 1, .name = "rcu_bh" |
c32e06605 [PATCH] rcutortur... |
502 |
}; |
11a147013 [PATCH] rcu: add ... |
503 |
static struct rcu_torture_ops rcu_bh_sync_ops = { |
0acc512cb rcu: Add synchron... |
504 505 506 507 508 509 510 |
.init = rcu_sync_torture_init, .cleanup = NULL, .readlock = rcu_bh_torture_read_lock, .read_delay = rcu_read_delay, /* just reuse rcu's version. */ .readunlock = rcu_bh_torture_read_unlock, .completed = rcu_bh_torture_completed, .deferred_free = rcu_sync_torture_deferred_free, |
bdf2a4364 rcu: Catch rcutor... |
511 |
.sync = synchronize_rcu_bh, |
0acc512cb rcu: Add synchron... |
512 |
.cb_barrier = NULL, |
bf66f18e7 rcu: Add force_qu... |
513 |
.fqs = rcu_bh_force_quiescent_state, |
0acc512cb rcu: Add synchron... |
514 515 516 |
.stats = NULL, .irq_capable = 1, .name = "rcu_bh_sync" |
11a147013 [PATCH] rcu: add ... |
517 |
}; |
bdf2a4364 rcu: Catch rcutor... |
518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 |
static struct rcu_torture_ops rcu_bh_expedited_ops = { .init = rcu_sync_torture_init, .cleanup = NULL, .readlock = rcu_bh_torture_read_lock, .read_delay = rcu_read_delay, /* just reuse rcu's version. */ .readunlock = rcu_bh_torture_read_unlock, .completed = rcu_bh_torture_completed, .deferred_free = rcu_sync_torture_deferred_free, .sync = synchronize_rcu_bh_expedited, .cb_barrier = NULL, .fqs = rcu_bh_force_quiescent_state, .stats = NULL, .irq_capable = 1, .name = "rcu_bh_expedited" }; |
b2896d2e7 [PATCH] srcu-3: a... |
533 534 535 536 537 |
/* * Definitions for srcu torture testing. */ static struct srcu_struct srcu_ctl; |
b2896d2e7 [PATCH] srcu-3: a... |
538 539 540 541 |
static void srcu_torture_init(void) { init_srcu_struct(&srcu_ctl); |
e30337365 [PATCH] rcu: refa... |
542 |
rcu_sync_torture_init(); |
b2896d2e7 [PATCH] srcu-3: a... |
543 544 545 546 547 548 549 |
} static void srcu_torture_cleanup(void) { synchronize_srcu(&srcu_ctl); cleanup_srcu_struct(&srcu_ctl); } |
012d3ca8d [PATCH] Add Spars... |
550 |
static int srcu_torture_read_lock(void) __acquires(&srcu_ctl) |
b2896d2e7 [PATCH] srcu-3: a... |
551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 |
{ return srcu_read_lock(&srcu_ctl); } static void srcu_read_delay(struct rcu_random_state *rrsp) { long delay; const long uspertick = 1000000 / HZ; const long longdelay = 10; /* We want there to be long-running readers, but not all the time. */ delay = rcu_random(rrsp) % (nrealreaders * 2 * longdelay * uspertick); if (!delay) schedule_timeout_interruptible(longdelay); |
e546f485e rcutorture: add r... |
566 567 |
else rcu_read_delay(rrsp); |
b2896d2e7 [PATCH] srcu-3: a... |
568 |
} |
012d3ca8d [PATCH] Add Spars... |
569 |
static void srcu_torture_read_unlock(int idx) __releases(&srcu_ctl) |
b2896d2e7 [PATCH] srcu-3: a... |
570 571 572 573 574 575 576 577 |
{ srcu_read_unlock(&srcu_ctl, idx); } static int srcu_torture_completed(void) { return srcu_batches_completed(&srcu_ctl); } |
b772e1dd4 [PATCH] RCU: add ... |
578 579 580 581 |
static void srcu_torture_synchronize(void) { synchronize_srcu(&srcu_ctl); } |
b2896d2e7 [PATCH] srcu-3: a... |
582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 |
static int srcu_torture_stats(char *page) { int cnt = 0; int cpu; int idx = srcu_ctl.completed & 0x1; cnt += sprintf(&page[cnt], "%s%s per-CPU(idx=%d):", torture_type, TORTURE_FLAG, idx); for_each_possible_cpu(cpu) { cnt += sprintf(&page[cnt], " %d(%d,%d)", cpu, per_cpu_ptr(srcu_ctl.per_cpu_ref, cpu)->c[!idx], per_cpu_ptr(srcu_ctl.per_cpu_ref, cpu)->c[idx]); } cnt += sprintf(&page[cnt], " "); return cnt; } static struct rcu_torture_ops srcu_ops = { |
0acc512cb rcu: Add synchron... |
601 602 603 604 605 606 607 608 609 610 611 |
.init = srcu_torture_init, .cleanup = srcu_torture_cleanup, .readlock = srcu_torture_read_lock, .read_delay = srcu_read_delay, .readunlock = srcu_torture_read_unlock, .completed = srcu_torture_completed, .deferred_free = rcu_sync_torture_deferred_free, .sync = srcu_torture_synchronize, .cb_barrier = NULL, .stats = srcu_torture_stats, .name = "srcu" |
b2896d2e7 [PATCH] srcu-3: a... |
612 |
}; |
101db7b41 rcu: Add rcutortu... |
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 |
static int srcu_torture_read_lock_raw(void) __acquires(&srcu_ctl) { return srcu_read_lock_raw(&srcu_ctl); } static void srcu_torture_read_unlock_raw(int idx) __releases(&srcu_ctl) { srcu_read_unlock_raw(&srcu_ctl, idx); } static struct rcu_torture_ops srcu_raw_ops = { .init = srcu_torture_init, .cleanup = srcu_torture_cleanup, .readlock = srcu_torture_read_lock_raw, .read_delay = srcu_read_delay, .readunlock = srcu_torture_read_unlock_raw, .completed = srcu_torture_completed, .deferred_free = rcu_sync_torture_deferred_free, .sync = srcu_torture_synchronize, .cb_barrier = NULL, .stats = srcu_torture_stats, .name = "srcu_raw" }; |
804bb8370 rcu: Add synchron... |
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 |
static void srcu_torture_synchronize_expedited(void) { synchronize_srcu_expedited(&srcu_ctl); } static struct rcu_torture_ops srcu_expedited_ops = { .init = srcu_torture_init, .cleanup = srcu_torture_cleanup, .readlock = srcu_torture_read_lock, .read_delay = srcu_read_delay, .readunlock = srcu_torture_read_unlock, .completed = srcu_torture_completed, .deferred_free = rcu_sync_torture_deferred_free, .sync = srcu_torture_synchronize_expedited, .cb_barrier = NULL, .stats = srcu_torture_stats, .name = "srcu_expedited" }; |
4b6c2cca6 [PATCH] rcu: add ... |
654 655 656 657 658 659 660 661 662 663 664 665 666 667 |
/* * Definitions for sched torture testing. */ static int sched_torture_read_lock(void) { preempt_disable(); return 0; } static void sched_torture_read_unlock(int idx) { preempt_enable(); } |
2326974df rcu: add call_rcu... |
668 669 670 671 |
static void rcu_sched_torture_deferred_free(struct rcu_torture *p) { call_rcu_sched(&p->rtort_rcu, rcu_torture_cb); } |
4b6c2cca6 [PATCH] rcu: add ... |
672 |
static struct rcu_torture_ops sched_ops = { |
0acc512cb rcu: Add synchron... |
673 674 675 676 677 |
.init = rcu_sync_torture_init, .cleanup = NULL, .readlock = sched_torture_read_lock, .read_delay = rcu_read_delay, /* just reuse rcu's version. */ .readunlock = sched_torture_read_unlock, |
d9a3da069 rcu: Add expedite... |
678 |
.completed = rcu_no_completed, |
0acc512cb rcu: Add synchron... |
679 |
.deferred_free = rcu_sched_torture_deferred_free, |
bdf2a4364 rcu: Catch rcutor... |
680 |
.sync = synchronize_sched, |
0acc512cb rcu: Add synchron... |
681 |
.cb_barrier = rcu_barrier_sched, |
bf66f18e7 rcu: Add force_qu... |
682 |
.fqs = rcu_sched_force_quiescent_state, |
0acc512cb rcu: Add synchron... |
683 684 685 |
.stats = NULL, .irq_capable = 1, .name = "sched" |
4b6c2cca6 [PATCH] rcu: add ... |
686 |
}; |
804bb8370 rcu: Add synchron... |
687 |
static struct rcu_torture_ops sched_sync_ops = { |
0acc512cb rcu: Add synchron... |
688 689 690 691 692 |
.init = rcu_sync_torture_init, .cleanup = NULL, .readlock = sched_torture_read_lock, .read_delay = rcu_read_delay, /* just reuse rcu's version. */ .readunlock = sched_torture_read_unlock, |
d9a3da069 rcu: Add expedite... |
693 |
.completed = rcu_no_completed, |
0acc512cb rcu: Add synchron... |
694 |
.deferred_free = rcu_sync_torture_deferred_free, |
bdf2a4364 rcu: Catch rcutor... |
695 |
.sync = synchronize_sched, |
0acc512cb rcu: Add synchron... |
696 |
.cb_barrier = NULL, |
bf66f18e7 rcu: Add force_qu... |
697 |
.fqs = rcu_sched_force_quiescent_state, |
0acc512cb rcu: Add synchron... |
698 699 700 |
.stats = NULL, .name = "sched_sync" }; |
0acc512cb rcu: Add synchron... |
701 702 703 704 705 706 |
static struct rcu_torture_ops sched_expedited_ops = { .init = rcu_sync_torture_init, .cleanup = NULL, .readlock = sched_torture_read_lock, .read_delay = rcu_read_delay, /* just reuse rcu's version. */ .readunlock = sched_torture_read_unlock, |
d9a3da069 rcu: Add expedite... |
707 |
.completed = rcu_no_completed, |
0acc512cb rcu: Add synchron... |
708 709 710 |
.deferred_free = rcu_sync_torture_deferred_free, .sync = synchronize_sched_expedited, .cb_barrier = NULL, |
bf66f18e7 rcu: Add force_qu... |
711 |
.fqs = rcu_sched_force_quiescent_state, |
969c79215 sched: replace mi... |
712 |
.stats = NULL, |
0acc512cb rcu: Add synchron... |
713 714 |
.irq_capable = 1, .name = "sched_expedited" |
2326974df rcu: add call_rcu... |
715 |
}; |
72e9bb549 [PATCH] rcutortur... |
716 |
/* |
8e8be45e8 rcu: add priority... |
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 |
* RCU torture priority-boost testing. Runs one real-time thread per * CPU for moderate bursts, repeatedly registering RCU callbacks and * spinning waiting for them to be invoked. If a given callback takes * too long to be invoked, we assume that priority inversion has occurred. */ struct rcu_boost_inflight { struct rcu_head rcu; int inflight; }; static void rcu_torture_boost_cb(struct rcu_head *head) { struct rcu_boost_inflight *rbip = container_of(head, struct rcu_boost_inflight, rcu); smp_mb(); /* Ensure RCU-core accesses precede clearing ->inflight */ rbip->inflight = 0; } static int rcu_torture_boost(void *arg) { unsigned long call_rcu_time; unsigned long endtime; unsigned long oldstarttime; struct rcu_boost_inflight rbi = { .inflight = 0 }; struct sched_param sp; VERBOSE_PRINTK_STRING("rcu_torture_boost started"); /* Set real-time priority. */ sp.sched_priority = 1; if (sched_setscheduler(current, SCHED_FIFO, &sp) < 0) { VERBOSE_PRINTK_STRING("rcu_torture_boost RT prio failed!"); n_rcu_torture_boost_rterror++; } |
561190e3b rcu: mark rcutort... |
753 |
init_rcu_head_on_stack(&rbi.rcu); |
8e8be45e8 rcu: add priority... |
754 755 756 757 |
/* Each pass through the following loop does one boost-test cycle. */ do { /* Wait for the next test interval. */ oldstarttime = boost_starttime; |
93898fb1a rcu: Make rcu_tor... |
758 |
while (ULONG_CMP_LT(jiffies, oldstarttime)) { |
8e8be45e8 rcu: add priority... |
759 760 761 762 763 764 765 766 767 768 |
schedule_timeout_uninterruptible(1); rcu_stutter_wait("rcu_torture_boost"); if (kthread_should_stop() || fullstop != FULLSTOP_DONTSTOP) goto checkwait; } /* Do one boost-test interval. */ endtime = oldstarttime + test_boost_duration * HZ; call_rcu_time = jiffies; |
93898fb1a rcu: Make rcu_tor... |
769 |
while (ULONG_CMP_LT(jiffies, endtime)) { |
8e8be45e8 rcu: add priority... |
770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 |
/* If we don't have a callback in flight, post one. */ if (!rbi.inflight) { smp_mb(); /* RCU core before ->inflight = 1. */ rbi.inflight = 1; call_rcu(&rbi.rcu, rcu_torture_boost_cb); if (jiffies - call_rcu_time > test_boost_duration * HZ - HZ / 2) { VERBOSE_PRINTK_STRING("rcu_torture_boost boosting failed"); n_rcu_torture_boost_failure++; } call_rcu_time = jiffies; } cond_resched(); rcu_stutter_wait("rcu_torture_boost"); if (kthread_should_stop() || fullstop != FULLSTOP_DONTSTOP) goto checkwait; } /* * Set the start time of the next test interval. * Yes, this is vulnerable to long delays, but such * delays simply cause a false negative for the next * interval. Besides, we are running at RT priority, * so delays should be relatively rare. */ |
ab8f11e5f rcu: Make rcu_tor... |
796 797 |
while (oldstarttime == boost_starttime && !kthread_should_stop()) { |
8e8be45e8 rcu: add priority... |
798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 |
if (mutex_trylock(&boost_mutex)) { boost_starttime = jiffies + test_boost_interval * HZ; n_rcu_torture_boosts++; mutex_unlock(&boost_mutex); break; } schedule_timeout_uninterruptible(1); } /* Go do the stutter. */ checkwait: rcu_stutter_wait("rcu_torture_boost"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); /* Clean up and exit. */ VERBOSE_PRINTK_STRING("rcu_torture_boost task stopping"); rcutorture_shutdown_absorb("rcu_torture_boost"); while (!kthread_should_stop() || rbi.inflight) schedule_timeout_uninterruptible(1); smp_mb(); /* order accesses to ->inflight before stack-frame death. */ |
9d68197c0 rcu: Don't destro... |
818 |
destroy_rcu_head_on_stack(&rbi.rcu); |
8e8be45e8 rcu: add priority... |
819 820 821 822 |
return 0; } /* |
bf66f18e7 rcu: Add force_qu... |
823 824 825 826 827 828 829 830 831 832 833 834 835 |
* RCU torture force-quiescent-state kthread. Repeatedly induces * bursts of calls to force_quiescent_state(), increasing the probability * of occurrence of some important types of race conditions. */ static int rcu_torture_fqs(void *arg) { unsigned long fqs_resume_time; int fqs_burst_remaining; VERBOSE_PRINTK_STRING("rcu_torture_fqs task started"); do { fqs_resume_time = jiffies + fqs_stutter * HZ; |
93898fb1a rcu: Make rcu_tor... |
836 837 |
while (ULONG_CMP_LT(jiffies, fqs_resume_time) && !kthread_should_stop()) { |
bf66f18e7 rcu: Add force_qu... |
838 839 840 |
schedule_timeout_interruptible(1); } fqs_burst_remaining = fqs_duration; |
93898fb1a rcu: Make rcu_tor... |
841 842 |
while (fqs_burst_remaining > 0 && !kthread_should_stop()) { |
bf66f18e7 rcu: Add force_qu... |
843 844 845 846 847 848 849 850 851 852 853 854 855 856 |
cur_ops->fqs(); udelay(fqs_holdoff); fqs_burst_remaining -= fqs_holdoff; } rcu_stutter_wait("rcu_torture_fqs"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_PRINTK_STRING("rcu_torture_fqs task stopping"); rcutorture_shutdown_absorb("rcu_torture_fqs"); while (!kthread_should_stop()) schedule_timeout_uninterruptible(1); return 0; } /* |
a241ec65a [PATCH] RCU tortu... |
857 858 859 860 861 862 863 864 865 866 867 868 869 870 |
* RCU torture writer kthread. Repeatedly substitutes a new structure * for that pointed to by rcu_torture_current, freeing the old structure * after a series of grace periods (the "pipeline"). */ static int rcu_torture_writer(void *arg) { int i; long oldbatch = rcu_batches_completed(); struct rcu_torture *rp; struct rcu_torture *old_rp; static DEFINE_RCU_RANDOM(rand); VERBOSE_PRINTK_STRING("rcu_torture_writer task started"); |
dbdf65b1b [PATCH] rcutortur... |
871 |
set_user_nice(current, 19); |
a241ec65a [PATCH] RCU tortu... |
872 873 |
do { schedule_timeout_uninterruptible(1); |
a71fca58b rcu: Fix whitespa... |
874 875 |
rp = rcu_torture_alloc(); if (rp == NULL) |
a241ec65a [PATCH] RCU tortu... |
876 877 878 |
continue; rp->rtort_pipe_count = 0; udelay(rcu_random(&rand) & 0x3ff); |
0ddea0ead rcu: fix sparse e... |
879 880 |
old_rp = rcu_dereference_check(rcu_torture_current, current == writer_task); |
996417d2c [PATCH] add succe... |
881 |
rp->rtort_mbtest = 1; |
a241ec65a [PATCH] RCU tortu... |
882 |
rcu_assign_pointer(rcu_torture_current, rp); |
9b2619aff rcu: Clean up cod... |
883 |
smp_wmb(); /* Mods to old_rp must follow rcu_assign_pointer() */ |
c8e5b1631 rcutorture: style... |
884 |
if (old_rp) { |
a241ec65a [PATCH] RCU tortu... |
885 886 887 888 889 |
i = old_rp->rtort_pipe_count; if (i > RCU_TORTURE_PIPE_LEN) i = RCU_TORTURE_PIPE_LEN; atomic_inc(&rcu_torture_wcount[i]); old_rp->rtort_pipe_count++; |
0acc512cb rcu: Add synchron... |
890 |
cur_ops->deferred_free(old_rp); |
a241ec65a [PATCH] RCU tortu... |
891 |
} |
4a2986568 rcu: make rcutort... |
892 |
rcutorture_record_progress(++rcu_torture_current_version); |
72e9bb549 [PATCH] rcutortur... |
893 |
oldbatch = cur_ops->completed(); |
c9d557c19 rcu: fix bug in r... |
894 895 |
rcu_stutter_wait("rcu_torture_writer"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); |
a241ec65a [PATCH] RCU tortu... |
896 |
VERBOSE_PRINTK_STRING("rcu_torture_writer task stopping"); |
c9d557c19 rcu: fix bug in r... |
897 898 |
rcutorture_shutdown_absorb("rcu_torture_writer"); while (!kthread_should_stop()) |
a241ec65a [PATCH] RCU tortu... |
899 900 901 902 903 |
schedule_timeout_uninterruptible(1); return 0; } /* |
b772e1dd4 [PATCH] RCU: add ... |
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 |
* RCU torture fake writer kthread. Repeatedly calls sync, with a random * delay between calls. */ static int rcu_torture_fakewriter(void *arg) { DEFINE_RCU_RANDOM(rand); VERBOSE_PRINTK_STRING("rcu_torture_fakewriter task started"); set_user_nice(current, 19); do { schedule_timeout_uninterruptible(1 + rcu_random(&rand)%10); udelay(rcu_random(&rand) & 0x3ff); cur_ops->sync(); |
c9d557c19 rcu: fix bug in r... |
919 920 |
rcu_stutter_wait("rcu_torture_fakewriter"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); |
b772e1dd4 [PATCH] RCU: add ... |
921 922 |
VERBOSE_PRINTK_STRING("rcu_torture_fakewriter task stopping"); |
c9d557c19 rcu: fix bug in r... |
923 924 |
rcutorture_shutdown_absorb("rcu_torture_fakewriter"); while (!kthread_should_stop()) |
b772e1dd4 [PATCH] RCU: add ... |
925 926 927 |
schedule_timeout_uninterruptible(1); return 0; } |
91afaf300 rcu: Add failure ... |
928 929 930 931 932 933 934 935 936 937 938 |
void rcutorture_trace_dump(void) { static atomic_t beenhere = ATOMIC_INIT(0); if (atomic_read(&beenhere)) return; if (atomic_xchg(&beenhere, 1) != 0) return; do_trace_rcu_torture_read(cur_ops->name, (struct rcu_head *)~0UL); ftrace_dump(DUMP_ALL); } |
b772e1dd4 [PATCH] RCU: add ... |
939 |
/* |
0729fbf3b rcu: make rcutort... |
940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 |
* RCU torture reader from timer handler. Dereferences rcu_torture_current, * incrementing the corresponding element of the pipeline array. The * counter in the element should never be greater than 1, otherwise, the * RCU implementation is broken. */ static void rcu_torture_timer(unsigned long unused) { int idx; int completed; static DEFINE_RCU_RANDOM(rand); static DEFINE_SPINLOCK(rand_lock); struct rcu_torture *p; int pipe_count; idx = cur_ops->readlock(); completed = cur_ops->completed(); |
632ee2001 rcu: Introduce lo... |
956 |
p = rcu_dereference_check(rcu_torture_current, |
632ee2001 rcu: Introduce lo... |
957 958 959 |
rcu_read_lock_bh_held() || rcu_read_lock_sched_held() || srcu_read_lock_held(&srcu_ctl)); |
91afaf300 rcu: Add failure ... |
960 |
do_trace_rcu_torture_read(cur_ops->name, &p->rtort_rcu); |
0729fbf3b rcu: make rcutort... |
961 962 963 964 965 966 967 968 |
if (p == NULL) { /* Leave because rcu_torture_writer is not yet underway */ cur_ops->readunlock(idx); return; } if (p->rtort_mbtest == 0) atomic_inc(&n_rcu_torture_mberror); spin_lock(&rand_lock); |
0acc512cb rcu: Add synchron... |
969 |
cur_ops->read_delay(&rand); |
0729fbf3b rcu: make rcutort... |
970 971 972 973 974 975 976 977 |
n_rcu_torture_timers++; spin_unlock(&rand_lock); preempt_disable(); pipe_count = p->rtort_pipe_count; if (pipe_count > RCU_TORTURE_PIPE_LEN) { /* Should not happen, but... */ pipe_count = RCU_TORTURE_PIPE_LEN; } |
91afaf300 rcu: Add failure ... |
978 979 |
if (pipe_count > 1) rcutorture_trace_dump(); |
dd17c8f72 percpu: remove pe... |
980 |
__this_cpu_inc(rcu_torture_count[pipe_count]); |
0729fbf3b rcu: make rcutort... |
981 982 983 984 985 |
completed = cur_ops->completed() - completed; if (completed > RCU_TORTURE_PIPE_LEN) { /* Should not happen, but... */ completed = RCU_TORTURE_PIPE_LEN; } |
dd17c8f72 percpu: remove pe... |
986 |
__this_cpu_inc(rcu_torture_batch[completed]); |
0729fbf3b rcu: make rcutort... |
987 988 989 990 991 |
preempt_enable(); cur_ops->readunlock(idx); } /* |
a241ec65a [PATCH] RCU tortu... |
992 993 994 995 996 997 998 999 1000 |
* RCU torture reader kthread. Repeatedly dereferences rcu_torture_current, * incrementing the corresponding element of the pipeline array. The * counter in the element should never be greater than 1, otherwise, the * RCU implementation is broken. */ static int rcu_torture_reader(void *arg) { int completed; |
72e9bb549 [PATCH] rcutortur... |
1001 |
int idx; |
a241ec65a [PATCH] RCU tortu... |
1002 1003 1004 |
DEFINE_RCU_RANDOM(rand); struct rcu_torture *p; int pipe_count; |
0729fbf3b rcu: make rcutort... |
1005 |
struct timer_list t; |
a241ec65a [PATCH] RCU tortu... |
1006 1007 |
VERBOSE_PRINTK_STRING("rcu_torture_reader task started"); |
dbdf65b1b [PATCH] rcutortur... |
1008 |
set_user_nice(current, 19); |
0acc512cb rcu: Add synchron... |
1009 |
if (irqreader && cur_ops->irq_capable) |
0729fbf3b rcu: make rcutort... |
1010 |
setup_timer_on_stack(&t, rcu_torture_timer, 0); |
dbdf65b1b [PATCH] rcutortur... |
1011 |
|
a241ec65a [PATCH] RCU tortu... |
1012 |
do { |
0acc512cb rcu: Add synchron... |
1013 |
if (irqreader && cur_ops->irq_capable) { |
0729fbf3b rcu: make rcutort... |
1014 |
if (!timer_pending(&t)) |
6155fec92 rcu: Fix rcutortu... |
1015 |
mod_timer(&t, jiffies + 1); |
0729fbf3b rcu: make rcutort... |
1016 |
} |
72e9bb549 [PATCH] rcutortur... |
1017 1018 |
idx = cur_ops->readlock(); completed = cur_ops->completed(); |
632ee2001 rcu: Introduce lo... |
1019 |
p = rcu_dereference_check(rcu_torture_current, |
632ee2001 rcu: Introduce lo... |
1020 1021 1022 |
rcu_read_lock_bh_held() || rcu_read_lock_sched_held() || srcu_read_lock_held(&srcu_ctl)); |
91afaf300 rcu: Add failure ... |
1023 |
do_trace_rcu_torture_read(cur_ops->name, &p->rtort_rcu); |
a241ec65a [PATCH] RCU tortu... |
1024 1025 |
if (p == NULL) { /* Wait for rcu_torture_writer to get underway */ |
72e9bb549 [PATCH] rcutortur... |
1026 |
cur_ops->readunlock(idx); |
a241ec65a [PATCH] RCU tortu... |
1027 1028 1029 |
schedule_timeout_interruptible(HZ); continue; } |
996417d2c [PATCH] add succe... |
1030 1031 |
if (p->rtort_mbtest == 0) atomic_inc(&n_rcu_torture_mberror); |
0acc512cb rcu: Add synchron... |
1032 |
cur_ops->read_delay(&rand); |
a241ec65a [PATCH] RCU tortu... |
1033 1034 1035 1036 1037 1038 |
preempt_disable(); pipe_count = p->rtort_pipe_count; if (pipe_count > RCU_TORTURE_PIPE_LEN) { /* Should not happen, but... */ pipe_count = RCU_TORTURE_PIPE_LEN; } |
91afaf300 rcu: Add failure ... |
1039 1040 |
if (pipe_count > 1) rcutorture_trace_dump(); |
dd17c8f72 percpu: remove pe... |
1041 |
__this_cpu_inc(rcu_torture_count[pipe_count]); |
72e9bb549 [PATCH] rcutortur... |
1042 |
completed = cur_ops->completed() - completed; |
a241ec65a [PATCH] RCU tortu... |
1043 1044 1045 1046 |
if (completed > RCU_TORTURE_PIPE_LEN) { /* Should not happen, but... */ completed = RCU_TORTURE_PIPE_LEN; } |
dd17c8f72 percpu: remove pe... |
1047 |
__this_cpu_inc(rcu_torture_batch[completed]); |
a241ec65a [PATCH] RCU tortu... |
1048 |
preempt_enable(); |
72e9bb549 [PATCH] rcutortur... |
1049 |
cur_ops->readunlock(idx); |
a241ec65a [PATCH] RCU tortu... |
1050 |
schedule(); |
c9d557c19 rcu: fix bug in r... |
1051 1052 |
rcu_stutter_wait("rcu_torture_reader"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); |
a241ec65a [PATCH] RCU tortu... |
1053 |
VERBOSE_PRINTK_STRING("rcu_torture_reader task stopping"); |
c9d557c19 rcu: fix bug in r... |
1054 |
rcutorture_shutdown_absorb("rcu_torture_reader"); |
0acc512cb rcu: Add synchron... |
1055 |
if (irqreader && cur_ops->irq_capable) |
0729fbf3b rcu: make rcutort... |
1056 |
del_timer_sync(&t); |
c9d557c19 rcu: fix bug in r... |
1057 |
while (!kthread_should_stop()) |
a241ec65a [PATCH] RCU tortu... |
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 |
schedule_timeout_uninterruptible(1); return 0; } /* * Create an RCU-torture statistics message in the specified buffer. */ static int rcu_torture_printk(char *page) { int cnt = 0; int cpu; int i; long pipesummary[RCU_TORTURE_PIPE_LEN + 1] = { 0 }; long batchsummary[RCU_TORTURE_PIPE_LEN + 1] = { 0 }; |
0a9450227 [PATCH] for_each_... |
1073 |
for_each_possible_cpu(cpu) { |
a241ec65a [PATCH] RCU tortu... |
1074 1075 1076 1077 1078 1079 1080 1081 1082 |
for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) { pipesummary[i] += per_cpu(rcu_torture_count, cpu)[i]; batchsummary[i] += per_cpu(rcu_torture_batch, cpu)[i]; } } for (i = RCU_TORTURE_PIPE_LEN - 1; i >= 0; i--) { if (pipesummary[i] != 0) break; } |
72e9bb549 [PATCH] rcutortur... |
1083 |
cnt += sprintf(&page[cnt], "%s%s ", torture_type, TORTURE_FLAG); |
a241ec65a [PATCH] RCU tortu... |
1084 |
cnt += sprintf(&page[cnt], |
4a2986568 rcu: make rcutort... |
1085 |
"rtc: %p ver: %lu tfle: %d rta: %d rtaf: %d rtf: %d " |
67b98dba4 rcu: eliminate un... |
1086 |
"rtmbe: %d rtbke: %ld rtbre: %ld " |
b58bdccaa rcu: Add rcutortu... |
1087 1088 |
"rtbf: %ld rtb: %ld nt: %ld " "onoff: %ld/%ld:%ld/%ld", |
a241ec65a [PATCH] RCU tortu... |
1089 1090 1091 1092 1093 |
rcu_torture_current, rcu_torture_current_version, list_empty(&rcu_torture_freelist), atomic_read(&n_rcu_torture_alloc), atomic_read(&n_rcu_torture_alloc_fail), |
996417d2c [PATCH] add succe... |
1094 |
atomic_read(&n_rcu_torture_free), |
0729fbf3b rcu: make rcutort... |
1095 |
atomic_read(&n_rcu_torture_mberror), |
8e8be45e8 rcu: add priority... |
1096 1097 |
n_rcu_torture_boost_ktrerror, n_rcu_torture_boost_rterror, |
8e8be45e8 rcu: add priority... |
1098 1099 |
n_rcu_torture_boost_failure, n_rcu_torture_boosts, |
b58bdccaa rcu: Add rcutortu... |
1100 1101 1102 1103 1104 |
n_rcu_torture_timers, n_online_successes, n_online_attempts, n_offline_successes, n_offline_attempts); |
8e8be45e8 rcu: add priority... |
1105 1106 1107 |
if (atomic_read(&n_rcu_torture_mberror) != 0 || n_rcu_torture_boost_ktrerror != 0 || n_rcu_torture_boost_rterror != 0 || |
8e8be45e8 rcu: add priority... |
1108 |
n_rcu_torture_boost_failure != 0) |
996417d2c [PATCH] add succe... |
1109 |
cnt += sprintf(&page[cnt], " !!!"); |
72e9bb549 [PATCH] rcutortur... |
1110 1111 |
cnt += sprintf(&page[cnt], " %s%s ", torture_type, TORTURE_FLAG); |
996417d2c [PATCH] add succe... |
1112 |
if (i > 1) { |
a241ec65a [PATCH] RCU tortu... |
1113 |
cnt += sprintf(&page[cnt], "!!! "); |
996417d2c [PATCH] add succe... |
1114 |
atomic_inc(&n_rcu_torture_error); |
5af970a48 rcutorture: WARN_... |
1115 |
WARN_ON_ONCE(1); |
996417d2c [PATCH] add succe... |
1116 |
} |
a241ec65a [PATCH] RCU tortu... |
1117 1118 1119 |
cnt += sprintf(&page[cnt], "Reader Pipe: "); for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) cnt += sprintf(&page[cnt], " %ld", pipesummary[i]); |
72e9bb549 [PATCH] rcutortur... |
1120 1121 |
cnt += sprintf(&page[cnt], " %s%s ", torture_type, TORTURE_FLAG); |
a241ec65a [PATCH] RCU tortu... |
1122 |
cnt += sprintf(&page[cnt], "Reader Batch: "); |
72e9bb549 [PATCH] rcutortur... |
1123 |
for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) |
a241ec65a [PATCH] RCU tortu... |
1124 |
cnt += sprintf(&page[cnt], " %ld", batchsummary[i]); |
72e9bb549 [PATCH] rcutortur... |
1125 1126 |
cnt += sprintf(&page[cnt], " %s%s ", torture_type, TORTURE_FLAG); |
a241ec65a [PATCH] RCU tortu... |
1127 1128 1129 1130 1131 1132 1133 |
cnt += sprintf(&page[cnt], "Free-Block Circulation: "); for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) { cnt += sprintf(&page[cnt], " %d", atomic_read(&rcu_torture_wcount[i])); } cnt += sprintf(&page[cnt], " "); |
c8e5b1631 rcutorture: style... |
1134 |
if (cur_ops->stats) |
72e9bb549 [PATCH] rcutortur... |
1135 |
cnt += cur_ops->stats(&page[cnt]); |
a241ec65a [PATCH] RCU tortu... |
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 |
return cnt; } /* * Print torture statistics. Caller must ensure that there is only * one call to this function at a given time!!! This is normally * accomplished by relying on the module system to only have one copy * of the module loaded, and then by giving the rcu_torture_stats * kthread full control (or the init/cleanup functions when rcu_torture_stats * thread is not running). */ static void rcu_torture_stats_print(void) { int cnt; cnt = rcu_torture_printk(printk_buf); printk(KERN_ALERT "%s", printk_buf); } /* * Periodically prints torture statistics, if periodic statistics printing * was specified via the stat_interval module parameter. * * No need to worry about fullstop here, since this one doesn't reference * volatile state or register callbacks. */ static int rcu_torture_stats(void *arg) { VERBOSE_PRINTK_STRING("rcu_torture_stats task started"); do { schedule_timeout_interruptible(stat_interval * HZ); rcu_torture_stats_print(); |
c9d557c19 rcu: fix bug in r... |
1170 1171 |
rcutorture_shutdown_absorb("rcu_torture_stats"); } while (!kthread_should_stop()); |
a241ec65a [PATCH] RCU tortu... |
1172 1173 1174 |
VERBOSE_PRINTK_STRING("rcu_torture_stats task stopping"); return 0; } |
d84f52034 [PATCH] Extend RC... |
1175 1176 1177 1178 1179 |
static int rcu_idle_cpu; /* Force all torture tasks off this CPU */ /* Shuffle tasks such that we allow @rcu_idle_cpu to become idle. A special case * is when @rcu_idle_cpu = -1, when we allow the tasks to run on all CPUs. */ |
b2896d2e7 [PATCH] srcu-3: a... |
1180 |
static void rcu_torture_shuffle_tasks(void) |
d84f52034 [PATCH] Extend RC... |
1181 |
{ |
d84f52034 [PATCH] Extend RC... |
1182 |
int i; |
73d0a4b10 cpumask: convert ... |
1183 |
cpumask_setall(shuffle_tmp_mask); |
86ef5c9a8 cpu-hotplug: repl... |
1184 |
get_online_cpus(); |
d84f52034 [PATCH] Extend RC... |
1185 1186 |
/* No point in shuffling if there is only one online CPU (ex: UP) */ |
c9d557c19 rcu: fix bug in r... |
1187 1188 1189 1190 |
if (num_online_cpus() == 1) { put_online_cpus(); return; } |
d84f52034 [PATCH] Extend RC... |
1191 1192 |
if (rcu_idle_cpu != -1) |
73d0a4b10 cpumask: convert ... |
1193 |
cpumask_clear_cpu(rcu_idle_cpu, shuffle_tmp_mask); |
d84f52034 [PATCH] Extend RC... |
1194 |
|
73d0a4b10 cpumask: convert ... |
1195 |
set_cpus_allowed_ptr(current, shuffle_tmp_mask); |
d84f52034 [PATCH] Extend RC... |
1196 |
|
c8e5b1631 rcutorture: style... |
1197 |
if (reader_tasks) { |
d84f52034 [PATCH] Extend RC... |
1198 1199 |
for (i = 0; i < nrealreaders; i++) if (reader_tasks[i]) |
f70316dac generic: use new ... |
1200 |
set_cpus_allowed_ptr(reader_tasks[i], |
73d0a4b10 cpumask: convert ... |
1201 |
shuffle_tmp_mask); |
d84f52034 [PATCH] Extend RC... |
1202 |
} |
c8e5b1631 rcutorture: style... |
1203 |
if (fakewriter_tasks) { |
b772e1dd4 [PATCH] RCU: add ... |
1204 1205 |
for (i = 0; i < nfakewriters; i++) if (fakewriter_tasks[i]) |
f70316dac generic: use new ... |
1206 |
set_cpus_allowed_ptr(fakewriter_tasks[i], |
73d0a4b10 cpumask: convert ... |
1207 |
shuffle_tmp_mask); |
b772e1dd4 [PATCH] RCU: add ... |
1208 |
} |
d84f52034 [PATCH] Extend RC... |
1209 |
if (writer_task) |
73d0a4b10 cpumask: convert ... |
1210 |
set_cpus_allowed_ptr(writer_task, shuffle_tmp_mask); |
d84f52034 [PATCH] Extend RC... |
1211 1212 |
if (stats_task) |
73d0a4b10 cpumask: convert ... |
1213 |
set_cpus_allowed_ptr(stats_task, shuffle_tmp_mask); |
d84f52034 [PATCH] Extend RC... |
1214 1215 1216 1217 1218 |
if (rcu_idle_cpu == -1) rcu_idle_cpu = num_online_cpus() - 1; else rcu_idle_cpu--; |
86ef5c9a8 cpu-hotplug: repl... |
1219 |
put_online_cpus(); |
d84f52034 [PATCH] Extend RC... |
1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 |
} /* Shuffle tasks across CPUs, with the intent of allowing each CPU in the * system to become idle at a time and cut off its timer ticks. This is meant * to test the support for such tickless idle CPU in RCU. */ static int rcu_torture_shuffle(void *arg) { VERBOSE_PRINTK_STRING("rcu_torture_shuffle task started"); do { schedule_timeout_interruptible(shuffle_interval * HZ); rcu_torture_shuffle_tasks(); |
c9d557c19 rcu: fix bug in r... |
1233 1234 |
rcutorture_shutdown_absorb("rcu_torture_shuffle"); } while (!kthread_should_stop()); |
d84f52034 [PATCH] Extend RC... |
1235 1236 1237 |
VERBOSE_PRINTK_STRING("rcu_torture_shuffle task stopping"); return 0; } |
d120f65f3 rcu: make rcutort... |
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 |
/* Cause the rcutorture test to "stutter", starting and stopping all * threads periodically. */ static int rcu_torture_stutter(void *arg) { VERBOSE_PRINTK_STRING("rcu_torture_stutter task started"); do { schedule_timeout_interruptible(stutter * HZ); stutter_pause_test = 1; |
c9d557c19 rcu: fix bug in r... |
1248 |
if (!kthread_should_stop()) |
d120f65f3 rcu: make rcutort... |
1249 1250 |
schedule_timeout_interruptible(stutter * HZ); stutter_pause_test = 0; |
c9d557c19 rcu: fix bug in r... |
1251 1252 |
rcutorture_shutdown_absorb("rcu_torture_stutter"); } while (!kthread_should_stop()); |
d120f65f3 rcu: make rcutort... |
1253 1254 1255 |
VERBOSE_PRINTK_STRING("rcu_torture_stutter task stopping"); return 0; } |
95c383227 [PATCH] rcutortur... |
1256 |
static inline void |
8e8be45e8 rcu: add priority... |
1257 |
rcu_torture_print_module_parms(struct rcu_torture_ops *cur_ops, char *tag) |
95c383227 [PATCH] rcutortur... |
1258 |
{ |
b772e1dd4 [PATCH] RCU: add ... |
1259 1260 |
printk(KERN_ALERT "%s" TORTURE_FLAG "--- %s: nreaders=%d nfakewriters=%d " |
95c383227 [PATCH] rcutortur... |
1261 |
"stat_interval=%d verbose=%d test_no_idle_hz=%d " |
bf66f18e7 rcu: Add force_qu... |
1262 |
"shuffle_interval=%d stutter=%d irqreader=%d " |
8e8be45e8 rcu: add priority... |
1263 1264 |
"fqs_duration=%d fqs_holdoff=%d fqs_stutter=%d " "test_boost=%d/%d test_boost_interval=%d " |
b58bdccaa rcu: Add rcutortu... |
1265 1266 1267 |
"test_boost_duration=%d shutdown_secs=%d " "onoff_interval=%d ", |
b772e1dd4 [PATCH] RCU: add ... |
1268 |
torture_type, tag, nrealreaders, nfakewriters, |
d120f65f3 rcu: make rcutort... |
1269 |
stat_interval, verbose, test_no_idle_hz, shuffle_interval, |
8e8be45e8 rcu: add priority... |
1270 1271 |
stutter, irqreader, fqs_duration, fqs_holdoff, fqs_stutter, test_boost, cur_ops->can_boost, |
b58bdccaa rcu: Add rcutortu... |
1272 1273 |
test_boost_interval, test_boost_duration, shutdown_secs, onoff_interval); |
95c383227 [PATCH] rcutortur... |
1274 |
} |
8e8be45e8 rcu: add priority... |
1275 |
static struct notifier_block rcutorture_shutdown_nb = { |
343e9099c rcu: fix rcutortu... |
1276 1277 |
.notifier_call = rcutorture_shutdown_notify, }; |
8e8be45e8 rcu: add priority... |
1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 |
static void rcutorture_booster_cleanup(int cpu) { struct task_struct *t; if (boost_tasks[cpu] == NULL) return; mutex_lock(&boost_mutex); VERBOSE_PRINTK_STRING("Stopping rcu_torture_boost task"); t = boost_tasks[cpu]; boost_tasks[cpu] = NULL; mutex_unlock(&boost_mutex); /* This must be outside of the mutex, otherwise deadlock! */ kthread_stop(t); } static int rcutorture_booster_init(int cpu) { int retval; if (boost_tasks[cpu] != NULL) return 0; /* Already created, nothing more to do. */ /* Don't allow time recalculation while creating a new task. */ mutex_lock(&boost_mutex); VERBOSE_PRINTK_STRING("Creating rcu_torture_boost task"); |
1f2880948 rcu: Use kthread_... |
1304 1305 1306 |
boost_tasks[cpu] = kthread_create_on_node(rcu_torture_boost, NULL, cpu_to_node(cpu), "rcu_torture_boost"); |
8e8be45e8 rcu: add priority... |
1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 |
if (IS_ERR(boost_tasks[cpu])) { retval = PTR_ERR(boost_tasks[cpu]); VERBOSE_PRINTK_STRING("rcu_torture_boost task create failed"); n_rcu_torture_boost_ktrerror++; boost_tasks[cpu] = NULL; mutex_unlock(&boost_mutex); return retval; } kthread_bind(boost_tasks[cpu], cpu); wake_up_process(boost_tasks[cpu]); mutex_unlock(&boost_mutex); return 0; } |
d5f546d83 rcu: Add rcutortu... |
1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 |
/* * Cause the rcutorture test to shutdown the system after the test has * run for the time specified by the shutdown_secs module parameter. */ static int rcu_torture_shutdown(void *arg) { long delta; unsigned long jiffies_snap; VERBOSE_PRINTK_STRING("rcu_torture_shutdown task started"); jiffies_snap = ACCESS_ONCE(jiffies); while (ULONG_CMP_LT(jiffies_snap, shutdown_time) && !kthread_should_stop()) { delta = shutdown_time - jiffies_snap; if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "rcu_torture_shutdown task: %lu " "jiffies remaining ", torture_type, delta); schedule_timeout_interruptible(delta); jiffies_snap = ACCESS_ONCE(jiffies); } |
b58bdccaa rcu: Add rcutortu... |
1344 |
if (kthread_should_stop()) { |
d5f546d83 rcu: Add rcutortu... |
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 |
VERBOSE_PRINTK_STRING("rcu_torture_shutdown task stopping"); return 0; } /* OK, shut down the system. */ VERBOSE_PRINTK_STRING("rcu_torture_shutdown task shutting down system"); shutdown_task = NULL; /* Avoid self-kill deadlock. */ rcu_torture_cleanup(); /* Get the success/failure message. */ kernel_power_off(); /* Shut down the system. */ return 0; } |
b58bdccaa rcu: Add rcutortu... |
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 |
#ifdef CONFIG_HOTPLUG_CPU /* * Execute random CPU-hotplug operations at the interval specified * by the onoff_interval. */ static int rcu_torture_onoff(void *arg) { int cpu; int maxcpu = -1; DEFINE_RCU_RANDOM(rand); VERBOSE_PRINTK_STRING("rcu_torture_onoff task started"); for_each_online_cpu(cpu) maxcpu = cpu; WARN_ON(maxcpu < 0); while (!kthread_should_stop()) { cpu = (rcu_random(&rand) >> 4) % (maxcpu + 1); |
f220242af rcu: Make rcutort... |
1376 |
if (cpu_online(cpu) && cpu_is_hotpluggable(cpu)) { |
b58bdccaa rcu: Add rcutortu... |
1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 |
if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "rcu_torture_onoff task: offlining %d ", torture_type, cpu); n_offline_attempts++; if (cpu_down(cpu) == 0) { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "rcu_torture_onoff task: " "offlined %d ", torture_type, cpu); n_offline_successes++; } |
f220242af rcu: Make rcutort... |
1392 |
} else if (cpu_is_hotpluggable(cpu)) { |
b58bdccaa rcu: Add rcutortu... |
1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 |
if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "rcu_torture_onoff task: onlining %d ", torture_type, cpu); n_online_attempts++; if (cpu_up(cpu) == 0) { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "rcu_torture_onoff task: " "onlined %d ", torture_type, cpu); n_online_successes++; } } schedule_timeout_interruptible(onoff_interval * HZ); } VERBOSE_PRINTK_STRING("rcu_torture_onoff task stopping"); return 0; } static int rcu_torture_onoff_init(void) { if (onoff_interval <= 0) return 0; onoff_task = kthread_run(rcu_torture_onoff, NULL, "rcu_torture_onoff"); if (IS_ERR(onoff_task)) { onoff_task = NULL; return PTR_ERR(onoff_task); } return 0; } static void rcu_torture_onoff_cleanup(void) { if (onoff_task == NULL) return; VERBOSE_PRINTK_STRING("Stopping rcu_torture_onoff task"); kthread_stop(onoff_task); } #else /* #ifdef CONFIG_HOTPLUG_CPU */ static void rcu_torture_onoff_init(void) { } static void rcu_torture_onoff_cleanup(void) { } #endif /* #else #ifdef CONFIG_HOTPLUG_CPU */ |
8e8be45e8 rcu: add priority... |
1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 |
static int rcutorture_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu) { long cpu = (long)hcpu; switch (action) { case CPU_ONLINE: case CPU_DOWN_FAILED: (void)rcutorture_booster_init(cpu); break; case CPU_DOWN_PREPARE: rcutorture_booster_cleanup(cpu); break; default: break; } return NOTIFY_OK; } static struct notifier_block rcutorture_cpu_nb = { .notifier_call = rcutorture_cpu_notify, }; |
a241ec65a [PATCH] RCU tortu... |
1470 1471 1472 1473 |
static void rcu_torture_cleanup(void) { int i; |
343e9099c rcu: fix rcutortu... |
1474 |
mutex_lock(&fullstop_mutex); |
4a2986568 rcu: make rcutort... |
1475 |
rcutorture_record_test_transition(); |
c9d557c19 rcu: fix bug in r... |
1476 1477 1478 1479 |
if (fullstop == FULLSTOP_SHUTDOWN) { printk(KERN_WARNING /* but going down anyway, so... */ "Concurrent 'rmmod rcutorture' and shutdown illegal! "); |
343e9099c rcu: fix rcutortu... |
1480 |
mutex_unlock(&fullstop_mutex); |
c9d557c19 rcu: fix bug in r... |
1481 |
schedule_timeout_uninterruptible(10); |
343e9099c rcu: fix rcutortu... |
1482 1483 1484 1485 |
if (cur_ops->cb_barrier != NULL) cur_ops->cb_barrier(); return; } |
c9d557c19 rcu: fix bug in r... |
1486 |
fullstop = FULLSTOP_RMMOD; |
343e9099c rcu: fix rcutortu... |
1487 |
mutex_unlock(&fullstop_mutex); |
8e8be45e8 rcu: add priority... |
1488 |
unregister_reboot_notifier(&rcutorture_shutdown_nb); |
d120f65f3 rcu: make rcutort... |
1489 1490 1491 1492 1493 |
if (stutter_task) { VERBOSE_PRINTK_STRING("Stopping rcu_torture_stutter task"); kthread_stop(stutter_task); } stutter_task = NULL; |
c8e5b1631 rcutorture: style... |
1494 |
if (shuffler_task) { |
d84f52034 [PATCH] Extend RC... |
1495 1496 |
VERBOSE_PRINTK_STRING("Stopping rcu_torture_shuffle task"); kthread_stop(shuffler_task); |
73d0a4b10 cpumask: convert ... |
1497 |
free_cpumask_var(shuffle_tmp_mask); |
d84f52034 [PATCH] Extend RC... |
1498 1499 |
} shuffler_task = NULL; |
c8e5b1631 rcutorture: style... |
1500 |
if (writer_task) { |
a241ec65a [PATCH] RCU tortu... |
1501 1502 1503 1504 |
VERBOSE_PRINTK_STRING("Stopping rcu_torture_writer task"); kthread_stop(writer_task); } writer_task = NULL; |
c8e5b1631 rcutorture: style... |
1505 |
if (reader_tasks) { |
a241ec65a [PATCH] RCU tortu... |
1506 |
for (i = 0; i < nrealreaders; i++) { |
c8e5b1631 rcutorture: style... |
1507 |
if (reader_tasks[i]) { |
a241ec65a [PATCH] RCU tortu... |
1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 |
VERBOSE_PRINTK_STRING( "Stopping rcu_torture_reader task"); kthread_stop(reader_tasks[i]); } reader_tasks[i] = NULL; } kfree(reader_tasks); reader_tasks = NULL; } rcu_torture_current = NULL; |
c8e5b1631 rcutorture: style... |
1518 |
if (fakewriter_tasks) { |
b772e1dd4 [PATCH] RCU: add ... |
1519 |
for (i = 0; i < nfakewriters; i++) { |
c8e5b1631 rcutorture: style... |
1520 |
if (fakewriter_tasks[i]) { |
b772e1dd4 [PATCH] RCU: add ... |
1521 1522 1523 1524 1525 1526 1527 1528 1529 |
VERBOSE_PRINTK_STRING( "Stopping rcu_torture_fakewriter task"); kthread_stop(fakewriter_tasks[i]); } fakewriter_tasks[i] = NULL; } kfree(fakewriter_tasks); fakewriter_tasks = NULL; } |
c8e5b1631 rcutorture: style... |
1530 |
if (stats_task) { |
a241ec65a [PATCH] RCU tortu... |
1531 1532 1533 1534 |
VERBOSE_PRINTK_STRING("Stopping rcu_torture_stats task"); kthread_stop(stats_task); } stats_task = NULL; |
bf66f18e7 rcu: Add force_qu... |
1535 1536 1537 1538 1539 |
if (fqs_task) { VERBOSE_PRINTK_STRING("Stopping rcu_torture_fqs task"); kthread_stop(fqs_task); } fqs_task = NULL; |
8e8be45e8 rcu: add priority... |
1540 1541 1542 1543 1544 1545 |
if ((test_boost == 1 && cur_ops->can_boost) || test_boost == 2) { unregister_cpu_notifier(&rcutorture_cpu_nb); for_each_possible_cpu(i) rcutorture_booster_cleanup(i); } |
d5f546d83 rcu: Add rcutortu... |
1546 1547 1548 1549 |
if (shutdown_task != NULL) { VERBOSE_PRINTK_STRING("Stopping rcu_torture_shutdown task"); kthread_stop(shutdown_task); } |
b58bdccaa rcu: Add rcutortu... |
1550 |
rcu_torture_onoff_cleanup(); |
bf66f18e7 rcu: Add force_qu... |
1551 |
|
a241ec65a [PATCH] RCU tortu... |
1552 |
/* Wait for all RCU callbacks to fire. */ |
2326974df rcu: add call_rcu... |
1553 1554 1555 |
if (cur_ops->cb_barrier != NULL) cur_ops->cb_barrier(); |
a241ec65a [PATCH] RCU tortu... |
1556 |
|
a241ec65a [PATCH] RCU tortu... |
1557 |
rcu_torture_stats_print(); /* -After- the stats thread is stopped! */ |
72e9bb549 [PATCH] rcutortur... |
1558 |
|
c8e5b1631 rcutorture: style... |
1559 |
if (cur_ops->cleanup) |
72e9bb549 [PATCH] rcutortur... |
1560 |
cur_ops->cleanup(); |
95c383227 [PATCH] rcutortur... |
1561 |
if (atomic_read(&n_rcu_torture_error)) |
8e8be45e8 rcu: add priority... |
1562 |
rcu_torture_print_module_parms(cur_ops, "End of test: FAILURE"); |
95c383227 [PATCH] rcutortur... |
1563 |
else |
8e8be45e8 rcu: add priority... |
1564 |
rcu_torture_print_module_parms(cur_ops, "End of test: SUCCESS"); |
a241ec65a [PATCH] RCU tortu... |
1565 |
} |
6f8bc500a rcutorture: Mark ... |
1566 |
static int __init |
a241ec65a [PATCH] RCU tortu... |
1567 1568 1569 1570 1571 |
rcu_torture_init(void) { int i; int cpu; int firsterr = 0; |
ade5fb818 rcutorture: Remov... |
1572 |
static struct rcu_torture_ops *torture_ops[] = |
d9a3da069 rcu: Add expedite... |
1573 |
{ &rcu_ops, &rcu_sync_ops, &rcu_expedited_ops, |
bdf2a4364 rcu: Catch rcutor... |
1574 |
&rcu_bh_ops, &rcu_bh_sync_ops, &rcu_bh_expedited_ops, |
101db7b41 rcu: Add rcutortu... |
1575 |
&srcu_ops, &srcu_raw_ops, &srcu_expedited_ops, |
804bb8370 rcu: Add synchron... |
1576 |
&sched_ops, &sched_sync_ops, &sched_expedited_ops, }; |
a241ec65a [PATCH] RCU tortu... |
1577 |
|
343e9099c rcu: fix rcutortu... |
1578 |
mutex_lock(&fullstop_mutex); |
a241ec65a [PATCH] RCU tortu... |
1579 |
/* Process args and tell the world that the torturer is on the job. */ |
ade5fb818 rcutorture: Remov... |
1580 |
for (i = 0; i < ARRAY_SIZE(torture_ops); i++) { |
72e9bb549 [PATCH] rcutortur... |
1581 |
cur_ops = torture_ops[i]; |
ade5fb818 rcutorture: Remov... |
1582 |
if (strcmp(torture_type, cur_ops->name) == 0) |
72e9bb549 [PATCH] rcutortur... |
1583 |
break; |
72e9bb549 [PATCH] rcutortur... |
1584 |
} |
ade5fb818 rcutorture: Remov... |
1585 |
if (i == ARRAY_SIZE(torture_ops)) { |
cf886c44e rcu: Improve rcut... |
1586 1587 |
printk(KERN_ALERT "rcu-torture: invalid torture type: \"%s\" ", |
72e9bb549 [PATCH] rcutortur... |
1588 |
torture_type); |
cf886c44e rcu: Improve rcut... |
1589 1590 1591 1592 1593 |
printk(KERN_ALERT "rcu-torture types:"); for (i = 0; i < ARRAY_SIZE(torture_ops); i++) printk(KERN_ALERT " %s", torture_ops[i]->name); printk(KERN_ALERT " "); |
343e9099c rcu: fix rcutortu... |
1594 |
mutex_unlock(&fullstop_mutex); |
a71fca58b rcu: Fix whitespa... |
1595 |
return -EINVAL; |
72e9bb549 [PATCH] rcutortur... |
1596 |
} |
bf66f18e7 rcu: Add force_qu... |
1597 1598 1599 1600 1601 1602 |
if (cur_ops->fqs == NULL && fqs_duration != 0) { printk(KERN_ALERT "rcu-torture: ->fqs NULL and non-zero " "fqs_duration, fqs disabled. "); fqs_duration = 0; } |
c8e5b1631 rcutorture: style... |
1603 |
if (cur_ops->init) |
72e9bb549 [PATCH] rcutortur... |
1604 |
cur_ops->init(); /* no "goto unwind" prior to this point!!! */ |
a241ec65a [PATCH] RCU tortu... |
1605 1606 1607 1608 |
if (nreaders >= 0) nrealreaders = nreaders; else nrealreaders = 2 * num_online_cpus(); |
8e8be45e8 rcu: add priority... |
1609 |
rcu_torture_print_module_parms(cur_ops, "Start of test"); |
c9d557c19 rcu: fix bug in r... |
1610 |
fullstop = FULLSTOP_DONTSTOP; |
a241ec65a [PATCH] RCU tortu... |
1611 1612 1613 1614 |
/* Set up the freelist. */ INIT_LIST_HEAD(&rcu_torture_freelist); |
788e770eb rcutorture: Use A... |
1615 |
for (i = 0; i < ARRAY_SIZE(rcu_tortures); i++) { |
996417d2c [PATCH] add succe... |
1616 |
rcu_tortures[i].rtort_mbtest = 0; |
a241ec65a [PATCH] RCU tortu... |
1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 |
list_add_tail(&rcu_tortures[i].rtort_free, &rcu_torture_freelist); } /* Initialize the statistics so that each run gets its own numbers. */ rcu_torture_current = NULL; rcu_torture_current_version = 0; atomic_set(&n_rcu_torture_alloc, 0); atomic_set(&n_rcu_torture_alloc_fail, 0); atomic_set(&n_rcu_torture_free, 0); |
996417d2c [PATCH] add succe... |
1628 1629 |
atomic_set(&n_rcu_torture_mberror, 0); atomic_set(&n_rcu_torture_error, 0); |
8e8be45e8 rcu: add priority... |
1630 1631 |
n_rcu_torture_boost_ktrerror = 0; n_rcu_torture_boost_rterror = 0; |
8e8be45e8 rcu: add priority... |
1632 1633 |
n_rcu_torture_boost_failure = 0; n_rcu_torture_boosts = 0; |
a241ec65a [PATCH] RCU tortu... |
1634 1635 |
for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) atomic_set(&rcu_torture_wcount[i], 0); |
0a9450227 [PATCH] for_each_... |
1636 |
for_each_possible_cpu(cpu) { |
a241ec65a [PATCH] RCU tortu... |
1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 |
for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) { per_cpu(rcu_torture_count, cpu)[i] = 0; per_cpu(rcu_torture_batch, cpu)[i] = 0; } } /* Start up the kthreads. */ VERBOSE_PRINTK_STRING("Creating rcu_torture_writer task"); writer_task = kthread_run(rcu_torture_writer, NULL, "rcu_torture_writer"); if (IS_ERR(writer_task)) { firsterr = PTR_ERR(writer_task); VERBOSE_PRINTK_ERRSTRING("Failed to create writer"); writer_task = NULL; goto unwind; } |
b772e1dd4 [PATCH] RCU: add ... |
1654 |
fakewriter_tasks = kzalloc(nfakewriters * sizeof(fakewriter_tasks[0]), |
a71fca58b rcu: Fix whitespa... |
1655 |
GFP_KERNEL); |
b772e1dd4 [PATCH] RCU: add ... |
1656 1657 1658 1659 1660 1661 1662 1663 |
if (fakewriter_tasks == NULL) { VERBOSE_PRINTK_ERRSTRING("out of memory"); firsterr = -ENOMEM; goto unwind; } for (i = 0; i < nfakewriters; i++) { VERBOSE_PRINTK_STRING("Creating rcu_torture_fakewriter task"); fakewriter_tasks[i] = kthread_run(rcu_torture_fakewriter, NULL, |
a71fca58b rcu: Fix whitespa... |
1664 |
"rcu_torture_fakewriter"); |
b772e1dd4 [PATCH] RCU: add ... |
1665 1666 1667 1668 1669 1670 1671 |
if (IS_ERR(fakewriter_tasks[i])) { firsterr = PTR_ERR(fakewriter_tasks[i]); VERBOSE_PRINTK_ERRSTRING("Failed to create fakewriter"); fakewriter_tasks[i] = NULL; goto unwind; } } |
2860aaba4 [PATCH] rcu: Avoi... |
1672 |
reader_tasks = kzalloc(nrealreaders * sizeof(reader_tasks[0]), |
a241ec65a [PATCH] RCU tortu... |
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 |
GFP_KERNEL); if (reader_tasks == NULL) { VERBOSE_PRINTK_ERRSTRING("out of memory"); firsterr = -ENOMEM; goto unwind; } for (i = 0; i < nrealreaders; i++) { VERBOSE_PRINTK_STRING("Creating rcu_torture_reader task"); reader_tasks[i] = kthread_run(rcu_torture_reader, NULL, "rcu_torture_reader"); if (IS_ERR(reader_tasks[i])) { firsterr = PTR_ERR(reader_tasks[i]); VERBOSE_PRINTK_ERRSTRING("Failed to create reader"); reader_tasks[i] = NULL; goto unwind; } } if (stat_interval > 0) { VERBOSE_PRINTK_STRING("Creating rcu_torture_stats task"); stats_task = kthread_run(rcu_torture_stats, NULL, "rcu_torture_stats"); if (IS_ERR(stats_task)) { firsterr = PTR_ERR(stats_task); VERBOSE_PRINTK_ERRSTRING("Failed to create stats"); stats_task = NULL; goto unwind; } } |
d84f52034 [PATCH] Extend RC... |
1701 1702 |
if (test_no_idle_hz) { rcu_idle_cpu = num_online_cpus() - 1; |
73d0a4b10 cpumask: convert ... |
1703 1704 1705 1706 1707 1708 |
if (!alloc_cpumask_var(&shuffle_tmp_mask, GFP_KERNEL)) { firsterr = -ENOMEM; VERBOSE_PRINTK_ERRSTRING("Failed to alloc mask"); goto unwind; } |
d84f52034 [PATCH] Extend RC... |
1709 1710 1711 1712 |
/* Create the shuffler thread */ shuffler_task = kthread_run(rcu_torture_shuffle, NULL, "rcu_torture_shuffle"); if (IS_ERR(shuffler_task)) { |
73d0a4b10 cpumask: convert ... |
1713 |
free_cpumask_var(shuffle_tmp_mask); |
d84f52034 [PATCH] Extend RC... |
1714 1715 1716 1717 1718 1719 |
firsterr = PTR_ERR(shuffler_task); VERBOSE_PRINTK_ERRSTRING("Failed to create shuffler"); shuffler_task = NULL; goto unwind; } } |
d120f65f3 rcu: make rcutort... |
1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 |
if (stutter < 0) stutter = 0; if (stutter) { /* Create the stutter thread */ stutter_task = kthread_run(rcu_torture_stutter, NULL, "rcu_torture_stutter"); if (IS_ERR(stutter_task)) { firsterr = PTR_ERR(stutter_task); VERBOSE_PRINTK_ERRSTRING("Failed to create stutter"); stutter_task = NULL; goto unwind; } } |
bf66f18e7 rcu: Add force_qu... |
1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 |
if (fqs_duration < 0) fqs_duration = 0; if (fqs_duration) { /* Create the stutter thread */ fqs_task = kthread_run(rcu_torture_fqs, NULL, "rcu_torture_fqs"); if (IS_ERR(fqs_task)) { firsterr = PTR_ERR(fqs_task); VERBOSE_PRINTK_ERRSTRING("Failed to create fqs"); fqs_task = NULL; goto unwind; } } |
8e8be45e8 rcu: add priority... |
1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 |
if (test_boost_interval < 1) test_boost_interval = 1; if (test_boost_duration < 2) test_boost_duration = 2; if ((test_boost == 1 && cur_ops->can_boost) || test_boost == 2) { int retval; boost_starttime = jiffies + test_boost_interval * HZ; register_cpu_notifier(&rcutorture_cpu_nb); for_each_possible_cpu(i) { if (cpu_is_offline(i)) continue; /* Heuristic: CPU can go offline. */ retval = rcutorture_booster_init(i); if (retval < 0) { firsterr = retval; goto unwind; } } } |
d5f546d83 rcu: Add rcutortu... |
1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 |
if (shutdown_secs > 0) { shutdown_time = jiffies + shutdown_secs * HZ; shutdown_task = kthread_run(rcu_torture_shutdown, NULL, "rcu_torture_shutdown"); if (IS_ERR(shutdown_task)) { firsterr = PTR_ERR(shutdown_task); VERBOSE_PRINTK_ERRSTRING("Failed to create shutdown"); shutdown_task = NULL; goto unwind; } } |
b58bdccaa rcu: Add rcutortu... |
1777 |
rcu_torture_onoff_init(); |
8e8be45e8 rcu: add priority... |
1778 |
register_reboot_notifier(&rcutorture_shutdown_nb); |
4a2986568 rcu: make rcutort... |
1779 |
rcutorture_record_test_transition(); |
343e9099c rcu: fix rcutortu... |
1780 |
mutex_unlock(&fullstop_mutex); |
a241ec65a [PATCH] RCU tortu... |
1781 1782 1783 |
return 0; unwind: |
343e9099c rcu: fix rcutortu... |
1784 |
mutex_unlock(&fullstop_mutex); |
a241ec65a [PATCH] RCU tortu... |
1785 1786 1787 1788 1789 1790 |
rcu_torture_cleanup(); return firsterr; } module_init(rcu_torture_init); module_exit(rcu_torture_cleanup); |