From: Tim Chen <tim.c.chen@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>, Andi Kleen <andi@firstfloor.org>,
Shawn Bohrer <sbohrer@rgmadvisors.com>,
Suruchi Kadu <suruchi.a.kadu@intel.com>,
Doug Nelson <doug.nelson@intel.com>,
linux-kernel@vger.kernel.org, Juri Lelli <juri.lelli@gmail.com>
Subject: Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target
Date: Thu, 15 Jan 2015 09:13:06 -0800 [thread overview]
Message-ID: <1421341986.2399.23.camel@schen9-desk2.jf.intel.com> (raw)
In-Reply-To: <20150106193025.GD23965@worktop.programming.kicks-ass.net>
On Tue, 2015-01-06 at 20:30 +0100, Peter Zijlstra wrote:
> On Tue, Jan 06, 2015 at 11:01:51AM -0800, Tim Chen wrote:
> > Didn't get any response for this patch probably due to the holidays.
> > Reposting it as we will like to get it merged to help our database
> > workload.
> >
> > This patch added checks that prevent futile attempts to move rt tasks
> > to cpu with active tasks of equal or higher priority. This reduces
> > run queue lock contention and improves the performance of a well
> > known OLTP benchmark by 0.7%.
>
> Don't immediately see anything wrong with this, Steve?
Steve, do you have any objections to this patch? Thanks.
Tim
next prev parent reply other threads:[~2015-01-15 17:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-06 19:01 Tim Chen
2015-01-06 19:30 ` Peter Zijlstra
2015-01-15 17:13 ` Tim Chen [this message]
2015-01-16 1:58 ` Steven Rostedt
2015-01-16 17:46 ` Tim Chen
2015-01-22 17:48 ` Tim Chen
2015-02-01 17:52 ` [tip:sched/core] sched/rt: " tip-bot for Tim Chen
2015-02-24 16:12 ` Steven Rostedt
2015-03-03 21:12 ` Ben Hutchings
2015-04-09 1:17 ` Zefan Li
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