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[v1.00] Reset affinity in Linux after querying topology

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Dr-Noob
2021-09-16 13:01:50 +02:00
parent c2b0213b9f
commit 3b7a122956
1 changed files with 18 additions and 0 deletions
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18
src/x86/apic.c
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@@ -313,6 +313,15 @@ bool fill_apic_ids(uint32_t* apic_ids, int n, bool x2apic_id) {
usleep(1000); usleep(1000);
} }
#else #else
#ifdef __linux__
// In Linux we reset the affinity; first we get the original mask
cpu_set_t original_mask;
if(sched_getaffinity(0, sizeof(original_mask), &original_mask) == -1) {
printWarn("sched_getaffinity: %s", strerror(errno));
return false;
}
#endif
for(int i=0; i < n; i++) { for(int i=0; i < n; i++) {
if(!bind_to_cpu(i)) { if(!bind_to_cpu(i)) {
printErr("Failed binding to CPU %d", i); printErr("Failed binding to CPU %d", i);
@@ -320,7 +329,16 @@ bool fill_apic_ids(uint32_t* apic_ids, int n, bool x2apic_id) {
} }
apic_ids[i] = get_apic_id(x2apic_id); apic_ids[i] = get_apic_id(x2apic_id);
} }
#ifdef __linux__
// With the original mask previosly retrieved, we reset the affinity
if (sched_setaffinity (0, sizeof(original_mask), &original_mask) == -1) {
printWarn("sched_setaffinity: %s", strerror(errno));
return false;
}
#endif #endif
#endif
return true; return true;
} }