linux-kernel - Re: [PATCH 00/15] cleanups and optimizations

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Date:	Tue, 17 Dec 2013 14:32:04 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Eliezer Tamir <eliezer.tamir@...ux.intel.com>
Cc:	Arjan van de Ven <arjan@...ux.intel.com>, lenb@...nel.org,
	rjw@...ysocki.net, rui.zhang@...el.com,
	jacob.jun.pan@...ux.intel.com,
	Mike Galbraith <bitbucket@...ine.de>,
	Ingo Molnar <mingo@...nel.org>, hpa@...or.com,
	paulmck@...ux.vnet.ibm.com, Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>,
	Andy Lutomirski <luto@...capital.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/15] cleanups and optimizations

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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