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MEDIUM: thread: reimplement first numa node detection

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Let's reimplement automatic binding to the first NUMA node when thread
count is not forced. It's the same thing as is already done in
check_config_validity() except that this time it's based on the
collected CPU information. The threads are automatically counted
and CPUs from non-first node(s) are evicted.
This commit is contained in:
Willy Tarreau 2023-07-20 16:40:25 +02:00
parent 4a525e8d27
commit e3aef4c9a4
1 changed files with 37 additions and 0 deletions
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37
src/thread.c
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@ -1614,6 +1614,43 @@ void thread_detect_count(void)
* on the same cluster _capacity_ up to thr_max.
*/
/* Let's implement here the automatic binding to the first available
* NUMA node when thread count is not set, taskset is not used and
* no cpu-map directive is present.
*/
if (global.numa_cpu_mapping && !global.nbthread && !cpu_mask_forced && !cpu_map_configured()) {
int first_node_id = -1;
int second_node_id = -1;
int cpu_count = 0;
/* determine first node with usable CPUs */
for (cpu = 0; cpu <= cpu_topo_lastcpu; cpu++) {
if (ha_cpu_topo[cpu].st & HA_CPU_F_EXCL_MASK)
continue;
if (ha_cpu_topo[cpu].no_id >= 0) {
if (first_node_id < 0)
first_node_id = ha_cpu_topo[cpu].no_id;
else {
second_node_id = ha_cpu_topo[cpu].no_id;
break;
}
}
}
if (second_node_id >= 0) {
/* ignore all CPUs of other nodes, and count them */
for (cpu = 0; cpu <= cpu_topo_lastcpu; cpu++) {
if (ha_cpu_topo[cpu].no_id != first_node_id)
ha_cpu_topo[cpu].st |= HA_CPU_F_IGNORED;
else if (!(ha_cpu_topo[cpu].st & HA_CPU_F_EXCL_MASK))
cpu_count++;
}
ha_diag_warning("Multi-socket cpu detected, automatically binding on active CPUs of '%d' (%u active cpu(s))\n", first_node_id, cpu_count);
}
}
if (!ha_cpuset_count(&cpu_map[0].thread[0])) {
/* thread 1 is not mapped, no policy was applied, so we have to
* count the threads ourselves.