Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752298AbdIVPxz (ORCPT ); Fri, 22 Sep 2017 11:53:55 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:46064 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752075AbdIVPxx (ORCPT ); Fri, 22 Sep 2017 11:53:53 -0400 Date: Fri, 22 Sep 2017 17:53:48 +0200 From: Peter Zijlstra To: Eric Farman Cc: Rik van Riel , =?utf-8?B?546L6YeR5rWm?= , LKML , Ingo Molnar , Christian Borntraeger , "KVM-ML (kvm@vger.kernel.org)" , vcaputo@pengaru.com, Matthew Rosato Subject: Re: sysbench throughput degradation in 4.13+ Message-ID: <20170922155348.zujigkn3o5eylctn@hirez.programming.kicks-ass.net> References: <95edafb1-5e9d-8461-db73-bcb002b7ebef@linux.vnet.ibm.com> <50a279d3-84eb-3403-f2f0-854934778037@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50a279d3-84eb-3403-f2f0-854934778037@linux.vnet.ibm.com> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 776 Lines: 20 On Fri, Sep 22, 2017 at 11:03:39AM -0400, Eric Farman wrote: > Hi Peter, Rik, > > With OSS last week, I'm sure this got lost in the deluge, so here's a > friendly ping. Very much so, inbox is a giant trainwreck ;-) > I picked up 4.14.0-rc1 earlier this week, and still see the > degradation described above. Not really a surprise, since I don't see any > other commits in this area beyond the ones I mentioned in my original note. > > Anyway, I'm unsure what else to try or what doc to pull to help debug this, > and would appreciate your expertise here. We can repro this pretty easily > as necessary to help get to the bottom of this. > > Many thanks in advance, Could you describe your sysbench setup? Are you running it on mysql or postgresql, what other options?