Re: [PATCH 00/15] cleanups and optimizations

From: Peter Zijlstra
Date: Tue Dec 17 2013 - 08:32:31 EST


On Mon, Dec 16, 2013 at 07:48:32PM +0200, Eliezer Tamir wrote:
> On 13/12/2013 15:56, Peter Zijlstra wrote:
> > On Fri, Dec 13, 2013 at 12:49:01PM +0200, Eliezer Tamir wrote:
> >> On 12/12/2013 16:08, Peter Zijlstra wrote:
> >>> This series contains the preempt_enable_no_resched() cleanups that include
> >>> spin_lock_bh() optimizations and local_clock() optimizations.
> >>
> >> I'm trying to test this on tip/master.
> >> Patch 3 fails to apply on kenrel/softirq.c
> >
> > https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git/log/?h=preempt_clock
> >
> > Applied just fine here.. stuffed it in a git tree.
>
> Thanks,
> That worked.
>
> My test is, netperf TCP_RR 1 byte, with busy polling enabled, 30s run.
>
> I see 92.0K RR with your patches, 91.8K RR with out them.
> This is barely above the noise level, but I'm pretty sure it's real.
> In any case I don't see any regression.

Awesomeness.. you'll work on subtracting the spin time from the sleep
time?
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