Re: [PATCH] timers: Don't wake ktimersoftd on every tick

From	Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH] timers: Don't wake ktimersoftd on every tick
Date	2017-02-10 19:30 +0100
Message-ID	<t9o7g-73R-21@gated-at.bofh.it> (permalink)
References	<t6Pnk-4ec-9@gated-at.bofh.it> <t6QMq-5eA-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 2017-02-03 12:21:12 [-0600], Haris Okanovic wrote:
> Collect expired timers in interrupt context to avoid overhead of waking
> ktimersoftd on every tick. ktimersoftd now wakes only when one or more
> timers are ready, which yields a minor reduction in small latency spikes.
> 
> This is implemented by storing lists of expired timers in timer_base,
> updated on each tick. Any addition to the lists wakes ktimersoftd
> (softirq) to process those timers.
> 
> Please refer to the following RFC threads for more details:
> https://www.spinics.net/lists/linux-rt-users/msg16095.html
> https://www.spinics.net/lists/linux-rt-users/msg16113.html
> 
> Signed-off-by: Haris Okanovic <haris.okanovic@ni.com>

applied.

Sebastian

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Re: [RFC v2] timers: Don't wake ktimersoftd on every tick Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2017-02-03 18:00 +0100
  [PATCH] timers: Don't wake ktimersoftd on every tick Haris Okanovic <haris.okanovic@ni.com> - 2017-02-03 19:30 +0100
    Re: [PATCH] timers: Don't wake ktimersoftd on every tick Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2017-02-10 19:30 +0100

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