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| author | Zhao Lei <zhaolei@cn.fujitsu.com> | 2016-06-20 17:37:20 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-09 13:56:15 +0200 |
| commit | 277a13e4f0d661678a7084bf97ed96a99c7dac21 (patch) | |
| tree | 95235ad9dcfa402e6fb363cebbd7b83737434253 /kernel/sched | |
| parent | 8e546bfafb3121ed25c73a0c02311ec58459344a (diff) | |
| download | linux-277a13e4f0d661678a7084bf97ed96a99c7dac21.tar.bz2 | |
sched/cpuacct: Introduce cpuacct.usage_all to show all CPU stats together
In current code, we can get cpuacct data from several files,
but each file has various limitations.
For example:
- We can get CPU usage in user and kernel mode via cpuacct.stat,
but we can't get detailed data about each CPU.
- We can get each CPU's kernel mode usage in cpuacct.usage_percpu_sys,
but we can't get user mode usage data at the same time.
This patch introduces cpuacct.usage_all, to show all detailed CPU
accounting data together:
# cat cpuacct.usage_all
cpu user system
0 3809760299 5807968992
1 3250329855 454612211
..
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/7744460969edd7caaf0e903592ee52353ed9bdd6.1466415271.git.zhaolei@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/cpuacct.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c index 677cd1ab33b7..bc0b309c3f19 100644 --- a/kernel/sched/cpuacct.c +++ b/kernel/sched/cpuacct.c @@ -240,6 +240,42 @@ static int cpuacct_percpu_seq_show(struct seq_file *m, void *V) return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_NSTATS); } +static int cpuacct_all_seq_show(struct seq_file *m, void *V) +{ + struct cpuacct *ca = css_ca(seq_css(m)); + int index; + int cpu; + + seq_puts(m, "cpu"); + for (index = 0; index < CPUACCT_STAT_NSTATS; index++) + seq_printf(m, " %s", cpuacct_stat_desc[index]); + seq_puts(m, "\n"); + + for_each_possible_cpu(cpu) { + struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu); + + seq_printf(m, "%d", cpu); + + for (index = 0; index < CPUACCT_STAT_NSTATS; index++) { +#ifndef CONFIG_64BIT + /* + * Take rq->lock to make 64-bit read safe on 32-bit + * platforms. + */ + raw_spin_lock_irq(&cpu_rq(cpu)->lock); +#endif + + seq_printf(m, " %llu", cpuusage->usages[index]); + +#ifndef CONFIG_64BIT + raw_spin_unlock_irq(&cpu_rq(cpu)->lock); +#endif + } + seq_puts(m, "\n"); + } + return 0; +} + static int cpuacct_stats_show(struct seq_file *sf, void *v) { struct cpuacct *ca = css_ca(seq_css(sf)); @@ -294,6 +330,10 @@ static struct cftype files[] = { .seq_show = cpuacct_percpu_sys_seq_show, }, { + .name = "usage_all", + .seq_show = cpuacct_all_seq_show, + }, + { .name = "stat", .seq_show = cpuacct_stats_show, }, |