Messages in this thread | | | Date | Thu, 8 Jun 2023 10:34:00 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] sched/idle: disable tick in idle=poll idle entry |
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On Wed, Jun 07, 2023 at 10:10:46PM -0300, Marcelo Tosatti wrote: > > Commit a5183862e76fdc25f36b39c2489b816a5c66e2e5 > ("tick/nohz: Conditionally restart tick on idle exit") allows > a nohz_full CPU to enter idle and return from it with the > scheduler tick disabled (since the tick might be undesired noise). > > The idle=poll case still unconditionally restarts the tick when entering > idle. > > To reduce the noise for that case as well, stop the tick when entering > idle, for the idle=poll case. > > tick_nohz_idle_exit (called if the NEED_RESCHED bit is set) > is responsible for re-enabling the tick when necessary.
Who cares and why?
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