Messages in this thread Patch in this message | | | From | Atul Pant <> | Subject | [RFC PATCH 2/2] sched/idle: Add a description for play_idle_precise | Date | Wed, 10 Apr 2024 10:24:17 +0530 |
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Since runtime accounting of any RT idle thread is prevented, add a description about this function that it runs idle loops on a cpu without these threads being preempted due to RT throttling.
Signed-off-by: Atul Pant <quic_atulpant@quicinc.com> --- kernel/sched/idle.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 5007b25c5bc6..7aaf3679f50a 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -334,6 +334,11 @@ static enum hrtimer_restart idle_inject_timer_fn(struct hrtimer *timer) return HRTIMER_NORESTART; } +/* + * This function runs idle loops on a cpu, whose policy is set as SCHED_FIFO. + * Despite being a rt thread, runtime for it is not accounted, thus preventing + * its preemption due to rt-throttling + */ void play_idle_precise(u64 duration_ns, u64 latency_ns) { struct idle_timer it; -- 2.25.1
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