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tools/power/turbostat: Obey allowed CPUs during startup

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Set turbostat CPU affinity to make sure turbostat is running on one of
the allowed CPUs.

Set base_cpu to the first allowed CPU so that some platform information
is dumped using one of the allowed CPUs.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Zhang Rui 2023-10-04 14:25:25 +08:00
parent 4ede6d1ce7
commit 7bb3fe27ad
1 changed files with 14 additions and 7 deletions
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21
tools/power/x86/turbostat/turbostat.c
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@ -5731,6 +5731,10 @@ void topology_probe()
}
}
if (!CPU_COUNT_S(cpu_allowed_setsize, cpu_allowed_set))
err(-ENODEV, "No valid cpus found");
sched_setaffinity(0, cpu_allowed_setsize, cpu_allowed_set);
/*
* Allocate and initialize cpu_affinity_set
*/
@ -5941,12 +5945,17 @@ void setup_all_buffers(void)
void set_base_cpu(void)
{
base_cpu = sched_getcpu();
if (base_cpu < 0)
err(-ENODEV, "No valid cpus found");
int i;
if (debug > 1)
fprintf(outf, "base_cpu = %d\n", base_cpu);
for (i = 0; i < topo.max_cpu_num + 1; ++i) {
if (cpu_is_not_allowed(i))
continue;
base_cpu = i;
if (debug > 1)
fprintf(outf, "base_cpu = %d\n", base_cpu);
return;
}
err(-ENODEV, "No valid cpus found");
}
void turbostat_init()
@ -5976,8 +5985,6 @@ int fork_it(char **argv)
first_counter_read = 0;
if (status)
exit(status);
/* clear affinity side-effect of get_counters() */
sched_setaffinity(0, cpu_present_setsize, cpu_present_set);
gettimeofday(&tv_even, (struct timezone *)NULL);
child_pid = fork();