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MEDIUM: cfgparse: assign NUMA affinity to cpu-maps

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Do not force affinity on the process, instead let's just apply it to
cpu-map, it will automatically be used later in the init process. We
can do this because we know that cpu-map was not set when we're using
this detection code.

This is much saner, as we don't need to manipulate the process' affinity
at this point in time, and just update the info that the user omitted to
set by themselves, which guarantees a better long-term consistency with
the documented feature.
This commit is contained in:
Willy Tarreau 2023-07-19 10:55:50 +02:00
parent 6ecabb3f35
commit 8a4466bd15
1 changed files with 8 additions and 12 deletions
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20
src/cfgparse.c
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@ -2627,6 +2627,7 @@ static int numa_detect_topology()
const char *parse_cpu_set_args[2];
char cpumap_path[PATH_MAX];
char *err = NULL;
int grp, thr;
/* node_cpu_set count is used as return value */
ha_cpuset_zero(&node_cpu_set);
@ -2675,12 +2676,9 @@ static int numa_detect_topology()
}
ha_diag_warning("Multi-socket cpu detected, automatically binding on active CPUs of '%s' (%u active cpu(s))\n", node, ha_cpuset_count(&node_cpu_set));
if (sched_setaffinity(getpid(), sizeof(node_cpu_set.cpuset), &node_cpu_set.cpuset) == -1) {
ha_warning("Cannot set the cpu affinity for this multi-cpu machine\n");
/* clear the cpuset used as return value */
ha_cpuset_zero(&node_cpu_set);
}
for (grp = 0; grp < MAX_TGROUPS; grp++)
for (thr = 0; thr < MAX_THREADS_PER_GROUP; thr++)
ha_cpuset_assign(&cpu_map[grp].thread[thr], &node_cpu_set);
free(node_dirlist[node_dirlist_size]);
break;
@ -2700,6 +2698,7 @@ static int numa_detect_topology()
struct hap_cpuset node_cpu_set;
int ndomains = 0, i;
size_t len = sizeof(ndomains);
int grp, thr;
if (sysctlbyname("vm.ndomains", &ndomains, &len, NULL, 0) == -1) {
ha_notice("Cannot assess the number of CPUs domains\n");
@ -2729,12 +2728,9 @@ static int numa_detect_topology()
ha_cpuset_assign(&node_cpu_set, &dom);
ha_diag_warning("Multi-socket cpu detected, automatically binding on active CPUs of '%d' (%u active cpu(s))\n", i, ha_cpuset_count(&node_cpu_set));
if (cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1, sizeof(node_cpu_set.cpuset), &node_cpu_set.cpuset) == -1) {
ha_warning("Cannot set the cpu affinity for this multi-cpu machine\n");
/* clear the cpuset used as return value */
ha_cpuset_zero(&node_cpu_set);
}
for (grp = 0; grp < MAX_TGROUPS; grp++)
for (thr = 0; thr < MAX_THREADS_PER_GROUP; thr++)
ha_cpuset_assign(&cpu_map[grp].thread[thr], &node_cpu_set);
break;
}
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