Commit 37f68a29 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Zhang Rui
Browse files

tools/power/turbostat: Move process to root cgroup 



When available CPUs are reduced via cgroup cpuset controller, turbostat
will exit with errors (For example):
	get_counters: Could not migrate to CPU 0
	turbostat: re-initialized with num_cpus 20
	get_counters: Could not migrate to CPU 0
	turbostat: re-initialized with num_cpus 20

Move the turbostat to root cgroup, which has every CPU.

Writing the value 0 to a cgroup.procs file causes the writing
process to be moved to the corresponding cgroup.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Tested-by: default avatarZhang Rui <rui.zhang@intel.com>
parent f638858d

tools/power/x86/turbostat/turbostat.c

+13 −0
Original line number Diff line number Diff line
@@ -6666,6 +6666,19 @@ void cmdline(int argc, char **argv) 


int main(int argc, char **argv)

{

	int fd, ret;



	fd = open("/sys/fs/cgroup/cgroup.procs", O_WRONLY);

	if (fd < 0)

		goto skip_cgroup_setting;



	ret = write(fd, "0\n", 2);

	if (ret == -1)

		perror("Can't update cgroup\n");



	close(fd);



skip_cgroup_setting:

	outf = stderr;

	cmdline(argc, argv);