Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [PATCH] timers: Recalculate next timer interrupt only when necessary | Date | Thu, 23 Jul 2020 15:53:32 +0200 |
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Frederic Weisbecker <frederic@kernel.org> writes: > > Since recalculating the next_expiry isn't a free operation, especially > when we must climb up the last wheel level to find out that no timer > has
I'm climbing stairs or mountains :)
> been enqueued at all, lets reuse the next expiry cache when it is > known
lets? Come on, the changelog is about facts not what we might do.
> unsigned long clk; > unsigned long next_expiry; > + bool next_expiry_recalc; > unsigned int cpu; > bool is_idle;
Care to stare at the output of
pahole -C timer_base kernel/time/timer.o
before and after?
Thanks,
tglx
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