Am 21.05.2021 um 22:19 schrieb John Kacur:

How about set_thread_affinity() since you want to use the function
for the main thread plus other threads.

quoted

+static void set_main_thread_affinity(struct bitmask *cpumask)
+{
+	int res;
+
+	errno = 0;
+	res = numa_sched_setaffinity(getpid(), cpumask);
+	if (res != 0)
+		warn("Couldn't setaffinity in main thread: %s\n",
+		     strerror(errno));
+}
+
  

Actually, I only intended to use this for the main thread.
I didn't touch the affinity setting of the timerthreads (and don't see a 
need to).

I'm not familiar with the whole cyclictest code and all options. Did you 
have
any specific threads in mind that also use numa_sched_setaffinity() and 
could
use this function?

Maybe you got that impression from the previous v3 iteration, where I 
moved the functionality
to rt_numa and added a parameter for the pid/tid. My motivation there 
was mainly,
that if I'm moving it into a library, then I should probably add a 
parameter for the pid to the function
in case someone has a usecase for that.