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SubjectRe: [PATCH 4/4] sched/cpuacct: Make user/system times in cpuacct.stat more precise
Date
Andrey Ryabinin <arbn@yandex-team.com> writes:
> static int cpuacct_stats_show(struct seq_file *sf, void *v)
> {
...
> for_each_possible_cpu(cpu) {
> u64 *cpustat = per_cpu_ptr(ca->cpustat, cpu)->cpustat;
>
> - val[CPUACCT_STAT_USER] += cpustat[CPUTIME_USER];
> - val[CPUACCT_STAT_USER] += cpustat[CPUTIME_NICE];
> - val[CPUACCT_STAT_SYSTEM] += cpustat[CPUTIME_SYSTEM];
> - val[CPUACCT_STAT_SYSTEM] += cpustat[CPUTIME_IRQ];
> - val[CPUACCT_STAT_SYSTEM] += cpustat[CPUTIME_SOFTIRQ];
> + cputime.utime += cpustat[CPUTIME_USER];
> + cputime.utime += cpustat[CPUTIME_NICE];
> + cputime.stime += cpustat[CPUTIME_SYSTEM];
> + cputime.stime += cpustat[CPUTIME_IRQ];
> + cputime.stime += cpustat[CPUTIME_SOFTIRQ];
> +
> + cputime.sum_exec_runtime += this_cpu_read(*ca->cpuusage);
> }

cputime.sum_exec_runtime += *per_cpu_ptr(ca->cpuusage, cpu);

Or the stats can all be 0...

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