selftests/cgroup: add user_usec sanity check in test_cpucg_nice

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In test_cpucg_nice, after the child process exits, user_usec is
read from cpu.stat but the value is not checked. Add a sanity check
to ensure user_usec > 0, analogous to test_cpucg_stats(), so that
the test fails early if CPU usage wasn't properly accounted.

Signed-off-by: Shaojie Sun <sunshaojie@kylinos.cn>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Acked-by: Tao Cui <cuitao@kylinos.cn>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Shaojie Sun 2026-07-30 21:07:17 +08:00 • committed by Tejun Heo

parent ae649c9636

commit 77bc7e952f

1 changed files with 2 additions and 0 deletions

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tools/testing/selftests/cgroup/test_cpu.c

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