Eric Lee / smarc-fsl-linux-kernel

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Commit 115d2d8963a426670ac3ce983fc4c4e001703943

Authored by Arnaldo Carvalho de Melo
1 parent 744bd8aa3c
Exists in master and in 39 other branches 8mp-imx_5.4.70_2.3.0, 8qm-imx_5.4.70_2.3.0, emb_imx_lf-5.15.y, emb_lf-6.1.y, imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, imx_4.1.15_1.0.0_ga, pitx_8mp_lf-5.10.y, rt-smarc-imx_4.1.15_1.0.0_ga, rt_linux_5.15.71, smarc-8m-android-11.0.0_2.0.0, smarc-imx6_4.14.98_2.0.0_ga, smarc-imx6_4.9.88_2.0.0_ga, smarc-imx7_4.14.98_2.0.0_ga, smarc-imx7_4.9.11_1.0.0_ga, smarc-imx7_4.9.88_2.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-imx_4.1.15_1.0.0_ga, smarc-imx_4.9.11_1.0.0_ga, smarc-imx_4.9.51_imx8m_ga, smarc-imx_4.9.88_2.0.0_ga, smarc-m6.0.1_2.1.0-ga, smarc-n7.1.2_2.0.0-ga, smarc-rel_imx_4.1.15_1.2.0_ga, smarc_8m_00d0_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.14.78_1.0.0_ga, smarc_8m_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.19.35_1.1.0, smarc_8mm_imx_4.14.78_1.0.0_ga, smarc_8mm_imx_4.14.98_2.0.0_ga, smarc_8mm_imx_4.19.35_1.1.0, smarc_8mm_imx_5.4.24_2.1.0, smarc_8mp_lf-5.10.y, smarc_8mq_imx_5.4.24_2.1.0, smarc_8mq_lf-5.10.y, smarc_imx_lf-5.15.y

perf record: Move perf_mmap__write_tail to perf.h 

Close to perf_mmap__read_head() and the perf_mmap struct definition.
This is useful for any recorder, and we will need it in 'perf test'.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Showing 2 changed files with 13 additions and 12 deletions Side-by-side Diff

tools/perf/builtin-record.c
Diff comments   View file @ 115d2d8
... ... @@ -80,17 +80,6 @@
80 80  
81 81 static struct perf_mmap mmap_array[MAX_NR_CPUS];
82 82  
83   -static void mmap_write_tail(struct perf_mmap *md, unsigned long tail)
84   -{
85   - struct perf_event_mmap_page *pc = md->base;
86   -
87   - /*
88   - * ensure all reads are done before we write the tail out.
89   - */
90   - /* mb(); */
91   - pc->data_tail = tail;
92   -}
93   -
94 83 static void advance_output(size_t size)
95 84 {
96 85 bytes_written += size;
... ... @@ -165,7 +154,7 @@
165 154 write_output(buf, size);
166 155  
167 156 md->prev = old;
168   - mmap_write_tail(md, old);
  157 + perf_mmap__write_tail(md, old);
169 158 }
170 159  
171 160 static volatile int done = 0;
... ... @@ -108,6 +108,18 @@
108 108 return head;
109 109 }
110 110  
  111 +static inline void perf_mmap__write_tail(struct perf_mmap *md,
  112 + unsigned long tail)
  113 +{
  114 + struct perf_event_mmap_page *pc = md->base;
  115 +
  116 + /*
  117 + * ensure all reads are done before we write the tail out.
  118 + */
  119 + /* mb(); */
  120 + pc->data_tail = tail;
  121 +}
  122 +
111 123 /*
112 124 * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all
113 125 * counters in the current task.