Re: [v7 0/8] Reduce cross CPU IPI interference

From: Gilad Ben-Yossef
Date: Thu Feb 02 2012 - 04:42:27 EST

On Wed, Feb 1, 2012 at 7:57 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Wed, 2012-02-01 at 18:35 +0100, Peter Zijlstra wrote:
>> On Sun, 2012-01-29 at 10:25 +0200, Gilad Ben-Yossef wrote:
>> >
>> > If this is of interest, I keep a list tracking global IPI and global
>> > task schedulers sources in the core kernel here:
>> >
>> You can add synchronize_.*_expedited() to the list, it does its best to
>> bash the entire machine in order to try and make RCU grace periods
>> happen fast.
> Also anything using stop_machine, such as module unload, cpu hot-unplug
> and text_poke().

Thanks! I've added it to the list together with the clocksource
watchdog, which is registering
a timer on each cpu in a cyclinc fashion.


Gilad Ben-Yossef
Chief Coffee Drinker
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