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scx_central: record number of (cpu) hotplug events. #1480

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scx_central: record number of (cpu) hotplug events. #1480

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9 changes: 7 additions & 2 deletions scheds/c/scx_central.c
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@ int main(int argc, char **argv)
struct scx_central *skel;
struct bpf_link *link;
__u64 seq = 0, ecode;
__u32 hotplugs = 0;
__s32 opt;
cpu_set_t *cpuset;

Expand Down Expand Up @@ -118,6 +119,9 @@ int main(int argc, char **argv)
printf("WARNING : BPF_F_TIMER_CPU_PIN not available, timer not pinned to central\n");

while (!exit_req && !UEI_EXITED(skel, uei)) {
if (UEI_ECODE_SYS_RSN(ecode) & SCX_ECODE_RSN_HOTPLUG) {
hotplugs ++;
}
printf("[SEQ %llu]\n", seq++);
printf("total :%10" PRIu64 " local:%10" PRIu64 " queued:%10" PRIu64 " lost:%10" PRIu64 "\n",
skel->bss->nr_total,
Expand All @@ -129,8 +133,9 @@ int main(int argc, char **argv)
skel->bss->nr_dispatches,
skel->bss->nr_mismatches,
skel->bss->nr_retries);
printf("overflow:%10" PRIu64 "\n",
skel->bss->nr_overflows);
printf("overflow:%10" PRIu64 " hotplugs:%10" PRIu32 "\n",
skel->bss->nr_overflows, hotplugs);

fflush(stdout);
sleep(1);
}
Expand Down