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O-RAN 7.2: set CPU affinity for ru_thread explicitly

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Force the CPU affinity for ru_thread explicitly to ru_thread_core. It is
already done via threadCreate(), but force again as per change request.

Delete commented 7.2 code that did the equivalent. We cannot set it in
the driver, as we don't have access to variable ru->ru_thread_core.

Closes: #732 (suggestion 2)
Suggested-by: Andrew Sergeev <andrew.sergeev@adtran.com>
This commit is contained in:
Robert Schmidt
2024-02-09 13:02:50 +01:00
parent b32b9e836f
commit b5ba3a69f1
2 changed files with 12 additions and 31 deletions
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executables/nr-ru.c
+12
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@@ -1204,6 +1204,18 @@ void *ru_thread( void *param ) {
malloc_IF4p5_buffer(ru);
}
int cpu = sched_getcpu();
if (ru->ru_thread_core > -1 && cpu != ru->ru_thread_core) {
/* we start the ru_thread using threadCreate(), which already sets CPU
* affinity; let's force it here again as per feature request #732 */
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(ru->ru_thread_core, &cpuset);
int ret = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
AssertFatal(ret == 0, "Error in pthread_getaffinity_np(): ret: %d, errno: %d", ret, errno);
LOG_I(PHY, "RU %d: manually set CPU affinity to CPU %d\n", ru->idx, ru->ru_thread_core);
}
LOG_I(PHY,"Starting IF interface for RU %d, nb_rx %d\n",ru->idx,ru->nb_rx);
AssertFatal(ru->nr_start_if(ru,NULL) == 0, "Could not start the IF device\n");