Messages in this thread | | | Subject | Re: [PATCH 1/2] timer: Avoid waking up an idle-core by migrate running timer | From | Eric Dumazet <> | Date | Tue, 21 Apr 2015 14:54:55 -0700 |
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On Tue, 2015-04-21 at 23:32 +0200, Thomas Gleixner wrote:
> > Are you realizing that __mod_timer() is a massive hotpath for network > heavy workloads?
BTW I was considering using mod_timer_pinned() from these networking timers (ie sk_reset_timer())
get_nohz_timer_target() sounds cool for laptop users, but is one cause for bad responses to DDOS, when the selected cpu gets stressed.
This is the reason I used mod_timer_pinned() in commit 789f558cfb3680ae ("tcp/dccp: get rid of central timewait timer")
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