From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Fleming Subject: Re: sysbench throughput degradation in 4.13+ Date: Tue, 10 Oct 2017 15:51:37 +0100 Message-ID: <20171010145137.GA2922@codeblueprint.co.uk> References: <50a279d3-84eb-3403-f2f0-854934778037@linux.vnet.ibm.com> <20170922155348.zujigkn3o5eylctn@hirez.programming.kicks-ass.net> <754f5a9f-5332-148d-2631-918fc7a7cfe9@linux.vnet.ibm.com> <20170927093530.s3sgdz2vamc5ka4w@hirez.programming.kicks-ass.net> <20170927135820.61cd077f@cuia.usersys.redhat.com> <20171002225312.GA24578@codeblueprint.co.uk> <20171003083932.3qa7jw2spmi5n5pg@hirez.programming.kicks-ass.net> <20171004161850.wgnu73dokpjfyfdk@hirez.programming.kicks-ass.net> <20171006103623.GA3314@codeblueprint.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Rik van Riel , Eric Farman , ????????? , LKML , Ingo Molnar , Christian Borntraeger , "KVM-ML (kvm@vger.kernel.org)" , vcaputo@pengaru.com, Matthew Rosato To: Peter Zijlstra Return-path: Content-Disposition: inline In-Reply-To: <20171006103623.GA3314@codeblueprint.co.uk> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Fri, 06 Oct, at 11:36:23AM, Matt Fleming wrote: > > It's a similar story for hackbench-threads-{pipes,sockets}, i.e. pipes > regress but performance is restored for sockets. > > Of course, like a dope, I forgot to re-run netperf with your WA_WEIGHT > patch. So I've queued that up now and it should be done by tomorrow. Yeah, netperf results look fine for either your NO_WA_WEIGHT or WA_WEIGHT patch. Any ETA on when this is going to tip?