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kernel/tsacct.c
4.98 KB
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/* * tsacct.c - System accounting over taskstats interface * * Copyright (C) Jay Lan, <jlan@sgi.com> * * * 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. * */ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/tsacct_kern.h> #include <linux/acct.h> |
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#include <linux/jiffies.h> |
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#include <linux/mm.h> |
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/* * fill in basic accounting fields */ |
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void bacct_add_tsk(struct user_namespace *user_ns, struct pid_namespace *pid_ns, struct taskstats *stats, struct task_struct *tsk) |
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{ |
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const struct cred *tcred; |
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struct timespec uptime, ts; |
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cputime_t utime, stime, utimescaled, stimescaled; |
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u64 ac_etime; |
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BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN); /* calculate task elapsed time in timespec */ do_posix_clock_monotonic_gettime(&uptime); |
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ts = timespec_sub(uptime, tsk->start_time); |
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/* rebase elapsed time to usec (should never be negative) */ |
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ac_etime = timespec_to_ns(&ts); do_div(ac_etime, NSEC_PER_USEC); stats->ac_etime = ac_etime; |
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stats->ac_btime = get_seconds() - ts.tv_sec; |
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if (thread_group_leader(tsk)) { stats->ac_exitcode = tsk->exit_code; if (tsk->flags & PF_FORKNOEXEC) stats->ac_flag |= AFORK; } if (tsk->flags & PF_SUPERPRIV) stats->ac_flag |= ASU; if (tsk->flags & PF_DUMPCORE) stats->ac_flag |= ACORE; if (tsk->flags & PF_SIGNALED) stats->ac_flag |= AXSIG; stats->ac_nice = task_nice(tsk); stats->ac_sched = tsk->policy; |
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stats->ac_pid = task_pid_nr_ns(tsk, pid_ns); |
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rcu_read_lock(); |
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tcred = __task_cred(tsk); |
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stats->ac_uid = from_kuid_munged(user_ns, tcred->uid); stats->ac_gid = from_kgid_munged(user_ns, tcred->gid); |
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stats->ac_ppid = pid_alive(tsk) ? |
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task_tgid_nr_ns(rcu_dereference(tsk->real_parent), pid_ns) : 0; |
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rcu_read_unlock(); |
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task_cputime(tsk, &utime, &stime); stats->ac_utime = cputime_to_usecs(utime); stats->ac_stime = cputime_to_usecs(stime); task_cputime_scaled(tsk, &utimescaled, &stimescaled); stats->ac_utimescaled = cputime_to_usecs(utimescaled); stats->ac_stimescaled = cputime_to_usecs(stimescaled); |
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stats->ac_minflt = tsk->min_flt; stats->ac_majflt = tsk->maj_flt; |
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strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm)); } |
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#ifdef CONFIG_TASK_XACCT |
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#define KB 1024 #define MB (1024*KB) |
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#define KB_MASK (~(KB-1)) |
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/* * fill in extended accounting fields */ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p) { |
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struct mm_struct *mm; |
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/* convert pages-usec to Mbyte-usec */ stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB; stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB; |
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mm = get_task_mm(p); if (mm) { |
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/* adjust to KB unit */ |
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stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB; stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB; |
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mmput(mm); |
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} |
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stats->read_char = p->ioac.rchar & KB_MASK; stats->write_char = p->ioac.wchar & KB_MASK; stats->read_syscalls = p->ioac.syscr & KB_MASK; stats->write_syscalls = p->ioac.syscw & KB_MASK; |
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#ifdef CONFIG_TASK_IO_ACCOUNTING |
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stats->read_bytes = p->ioac.read_bytes & KB_MASK; stats->write_bytes = p->ioac.write_bytes & KB_MASK; stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK; |
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#else stats->read_bytes = 0; stats->write_bytes = 0; stats->cancelled_write_bytes = 0; #endif |
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} |
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#undef KB #undef MB |
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|
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static void __acct_update_integrals(struct task_struct *tsk, cputime_t utime, cputime_t stime) |
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{ if (likely(tsk->mm)) { |
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cputime_t time, dtime; struct timeval value; |
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unsigned long flags; |
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u64 delta; |
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local_irq_save(flags); |
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time = stime + utime; |
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dtime = time - tsk->acct_timexpd; |
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jiffies_to_timeval(cputime_to_jiffies(dtime), &value); delta = value.tv_sec; delta = delta * USEC_PER_SEC + value.tv_usec; |
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if (delta == 0) |
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goto out; |
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tsk->acct_timexpd = time; |
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tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm); tsk->acct_vm_mem1 += delta * tsk->mm->total_vm; |
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out: local_irq_restore(flags); |
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} } /** |
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* acct_update_integrals - update mm integral fields in task_struct * @tsk: task_struct for accounting */ void acct_update_integrals(struct task_struct *tsk) { cputime_t utime, stime; task_cputime(tsk, &utime, &stime); __acct_update_integrals(tsk, utime, stime); } /** * acct_account_cputime - update mm integral after cputime update * @tsk: task_struct for accounting */ void acct_account_cputime(struct task_struct *tsk) { __acct_update_integrals(tsk, tsk->utime, tsk->stime); } /** |
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* acct_clear_integrals - clear the mm integral fields in task_struct * @tsk: task_struct whose accounting fields are cleared */ void acct_clear_integrals(struct task_struct *tsk) { |
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tsk->acct_timexpd = 0; |
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tsk->acct_rss_mem1 = 0; tsk->acct_vm_mem1 = 0; } |
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#endif |