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rackmeter: Use vtime aware kcpustat accessor 

Now that we have a vtime safe kcpustat accessor, use it to fetch
CPUTIME_NICE and fix frozen kcpustat values on nohz_full CPUs.

Reported-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wanpeng Li <wanpengli@tencent.com>
Link: https://lkml.kernel.org/r/20191121024430.19938-7-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2019-11-21 03:44:30 +01:00 committed by Ingo Molnar
parent 8688f2fb67
commit 8392853e96
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/macintosh/rack-meter.c
View File

@ -81,13 +81,14 @@ static int rackmeter_ignore_nice;
*/
static inline u64 get_cpu_idle_time(unsigned int cpu)
{
struct kernel_cpustat *kcpustat = &kcpustat_cpu(cpu);
u64 retval;
retval = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE] +
kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
retval = kcpustat->cpustat[CPUTIME_IDLE] +
kcpustat->cpustat[CPUTIME_IOWAIT];
if (rackmeter_ignore_nice)
retval += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];
retval += kcpustat_field(kcpustat, CPUTIME_NICE, cpu);
return retval;
}