- Retrieve current affinity of the process and make sure not to (#7318)
* - Retrieve current affinity of the process and make sure not to start an idle thread (wake_cpu_thread) if the core is not in the allowed cpu set. * - Use pthread_getaffinity_np to match wake_cpu_thread that uses pthread_setaffinity_np - Add error check + error logging
Stelios Fragkakis committed
Nov 18, 2019 at 20:17 UTC
872430fe297fa888e101237ea7494d9d8ce337fb
1 file changed
+9
collectors/proc.plugin/proc_stat.c
+9
@@ -993,6 +993,15 @@ int do_proc_stat(int update_every, usec_t dt) {
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for(core = 0; core < schedstat_cores_found; core++) {
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if(unlikely(!(cpuidle_charts[core].active_time - cpuidle_charts[core].last_active_time))) {
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pthread_t thread;
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+ cpu_set_t global_cpu_set;
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+
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+ if (likely(!pthread_getaffinity_np(pthread_self(), sizeof(cpu_set_t), &global_cpu_set))) {
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+ if (unlikely(!CPU_ISSET(core, &global_cpu_set))) {
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+ continue;
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+ }
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+ }
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+ else
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+ error("Cannot read current process affinity");
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if(unlikely(pthread_create(&thread, NULL, wake_cpu_thread, (void *)&core)))
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error("Cannot create wake_cpu_thread");