On Mon, 19 Jul 2021, Daniel Wagner wrote:
> 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 <dwagner@xxxxxxx>
> ---
> 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
>
>
-Some minor fixes to the description
Signed-off-by: John Kacur <jkacur@xxxxxxxxxx>
