Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752333AbdI1JLQ (ORCPT ); Thu, 28 Sep 2017 05:11:16 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:33325 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751196AbdI1JLP (ORCPT ); Thu, 28 Sep 2017 05:11:15 -0400 Subject: Re: sysbench throughput degradation in 4.13+ To: Eric Farman , Peter Zijlstra Cc: Rik van Riel , =?UTF-8?B?546L6YeR5rWm?= , LKML , Ingo Molnar , "KVM-ML (kvm@vger.kernel.org)" , vcaputo@pengaru.com, Matthew Rosato References: <95edafb1-5e9d-8461-db73-bcb002b7ebef@linux.vnet.ibm.com> <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> From: Christian Borntraeger Date: Thu, 28 Sep 2017 11:08:49 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 17092809-0020-0000-0000-000003BBDD7B X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17092809-0021-0000-0000-0000424DC5BB Message-Id: <9cc35458-cbd8-40a1-584e-2ee61fb9543c@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-09-28_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1709280141 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 954 Lines: 35 On 09/27/2017 06:27 PM, Eric Farman wrote: > > > On 09/27/2017 05:35 AM, Peter Zijlstra wrote: >> On Fri, Sep 22, 2017 at 12:12:45PM -0400, Eric Farman wrote: >>> >>> MySQL. We've tried a few different configs with both test=oltp and >>> test=threads, but both show the same behavior. What I have settled on for >>> my repro is the following: >>> >> >> Right, didn't even need to run it in a guest to observe a regression. >> >> So the below cures native sysbench and NAS bench for me, does it also >> work for you virt thingy? [...] > --test=oltp > Baseline: 5655.26 transactions/second > Patched: 9618.13 transactions/second > > --test=threads > Baseline: 25482.9 events/sec > Patched: 29577.9 events/sec > > That's good! With that... > > Tested-by: Eric Farman > > Thanks! > > - Eric Assuming that we settle on this or Riks alternative patch. Are we going to schedule this for 4.13 stable as well?