Re: [tip:sched/urgent] sched: Fix cross-cpu clock sync on remote wakeups
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- Subject: Re: [tip:sched/urgent] sched: Fix cross-cpu clock sync on remote wakeups
- From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- Date: Fri, 03 Jun 2011 12:58:33 +0200
- Cc: Yong Zhang <yong.zhang0@xxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "hpa@xxxxxxxxx" <hpa@xxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "markus@xxxxxxxxxxxxxxx" <markus@xxxxxxxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "mingo@xxxxxxx" <mingo@xxxxxxx>, "linux-tip-commits@xxxxxxxxxxxxxxx" <linux-tip-commits@xxxxxxxxxxxxxxx>
- In-reply-to: <1307098506.2353.3094.camel@twins>
On Fri, 2011-06-03 at 12:55 +0200, Peter Zijlstra wrote:
> On Fri, 2011-06-03 at 12:36 +0200, Peter Zijlstra wrote:
> > > Can we get some numbers for how often the two cases occur on some
> > > various workloads?
> >
> > Sure, let me stick some counters in.
>
> Of 128765 IPIs, 17483 were with an empty list (boot + make -j64).
>
> I didn't yet look at where those empty ones originated from.
After two more make clean; make -j64 cycles thats:
250082:24793
So on this load its 10+:1.
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