diff options
| author | Shrikanth Hegde <sshegde@linux.ibm.com> | 2026-01-15 13:05:23 +0530 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-01-15 22:41:27 +0100 |
| commit | 94e70734b4d034b9df795bd1ad3452ea96e742ca (patch) | |
| tree | b1edec7b281aa21bb506cf6d1ebcec68d81496bb | |
| parent | 6b67c8a72e56041f91f70ae5995bdb769761869a (diff) | |
sched/fair: Change likelyhood of nohz.nr_cpus
These days most of the system have multi cores. The likelyhood of
at least one or more CPUs in nohz (idle state) is higher.
Give accurate hint to the branch predictor.
Reviewed-and-tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://patch.msgid.link/20260115073524.376643-3-sshegde@linux.ibm.com
| -rw-r--r-- | kernel/sched/fair.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 9afe0c69a3c1..4ae06ce4a916 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -12459,9 +12459,9 @@ static void nohz_balancer_kick(struct rq *rq) /* * None are in tickless mode and hence no need for NOHZ idle load - * balancing: + * balancing */ - if (likely(!atomic_read(&nohz.nr_cpus))) + if (unlikely(!atomic_read(&nohz.nr_cpus))) return; if (rq->nr_running >= 2) { |