[PATCH rt-tests v3 1/1] rt-numa: Use sched_getaffinity() instead of pthread_getaffinity_np()
From: Daniel Wagner <hidden>
Date: 2021-07-19 09:30:33
Subsystem:
the rest · Maintainer:
Linus Torvalds
pthread_getaffinity_np() prevents static builds as glibc does not
expose it for this configuration. Instead use sched_getaffinity()
directly as pthread_getaffinity_np() is just a fancy glibc wrapper
around sched_getaffinity().
Static builds helps in in situation where the rootfs is minimal
and does for example not ship libnuma.
The pthread_getaffinity_np call was introduced by commit
f240656b056b ("rt-tests: cyclictest: Fix -t without a user specified
[NUM]")
Signed-off-by: Daniel Wagner <redacted>
---
src/lib/rt-numa.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/src/lib/rt-numa.c b/src/lib/rt-numa.c
index babcc634d57e..bb0121a65eca 100644
--- a/src/lib/rt-numa.c
+++ b/src/lib/rt-numa.c@@ -68,15 +68,13 @@ int cpu_for_thread_sp(int thread_num, int max_cpus, struct bitmask *cpumask) int cpu_for_thread_ua(int thread_num, int max_cpus) { int res, num_cpus, i, m, cpu; - pthread_t thread; cpu_set_t cpuset; - thread = pthread_self(); CPU_ZERO(&cpuset); - res = pthread_getaffinity_np(thread, sizeof(cpu_set_t), &cpuset); + res = sched_getaffinity(0, sizeof(cpu_set_t), &cpuset); if (res != 0) - fatal("pthread_getaffinity_np failed: %s\n", strerror(res)); + fatal("sched_getaffinity failed: %s\n", strerror(res)); num_cpus = CPU_COUNT(&cpuset); m = thread_num % num_cpus;
--
2.32.0