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[v1.06][X86] Bugfix: set affinity in --accurate-pp

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There are cases where measure_frequency is called after binding the
process to a specific core via bind_to_cpu (e.g., when iterating over
modules in hybrid architectures). Thus, in measure_frequency we must
set the affinity of the newly created threads, ensuring they are
binded to the right core.
This commit is contained in:
Dr-Noob
2024-08-26 12:31:18 +01:00
parent 9f66a137c5
commit 0507355372
1 changed files with 18 additions and 1 deletions
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19
src/x86/freq/freq.c
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@@ -116,8 +116,25 @@ int64_t measure_frequency(struct cpuInfo* cpu) {
}
pthread_t* compute_th = malloc(sizeof(pthread_t) * cpu->topo->total_cores);
cpu_set_t cpus;
pthread_attr_t attr;
if ((ret = pthread_attr_init(&attr)) != 0) {
printErr("pthread_attr_init: %s", strerror(ret));
return -1;
}
for(int i=0; i < cpu->topo->total_cores; i++) {
ret = pthread_create(&compute_th[i], NULL, compute_function, NULL);
// We might have called bind_to_cpu previously, binding the threads
// to a specific core, so now we must make sure we run the new thread
// on the correct core.
CPU_ZERO(&cpus);
CPU_SET(i, &cpus);
if ((ret = pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &cpus)) != 0) {
printErr("pthread_attr_setaffinity_np: %s", strerror(ret));
return -1;
}
ret = pthread_create(&compute_th[i], &attr, compute_function, NULL);
if(ret != 0) {
fprintf(stderr, "Error creating thread\n");