From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1756316AbdJJOvn (ORCPT <rfc822;w@1wt.eu>);
        Tue, 10 Oct 2017 10:51:43 -0400
Received: from mail-wm0-f49.google.com ([74.125.82.49]:45634 "EHLO
        mail-wm0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1756176AbdJJOvl (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 10 Oct 2017 10:51:41 -0400
X-Google-Smtp-Source: AOwi7QBx6wL96OGE0slCd4ARb7brB+cIxofWt8HZu8bt0cjM8HHtZsZza55Ql+HCsYhyGwrfvaUZMQ==
Date: Tue, 10 Oct 2017 15:51:37 +0100
From: Matt Fleming <matt@codeblueprint.co.uk>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>,
        Eric Farman <farman@linux.vnet.ibm.com>,
        ????????? <jinpuwang@gmail.com>, LKML <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        "KVM-ML (kvm@vger.kernel.org)" <kvm@vger.kernel.org>,
        vcaputo@pengaru.com, Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Subject: Re: sysbench throughput degradation in 4.13+
Message-ID: <20171010145137.GA2922@codeblueprint.co.uk>
References: <CAD9gYJJ9nSAbznEn80hfY3=+YjA8cKw6RztpgW6iDm7rQ0EsFg@mail.gmail.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>
 <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
Content-Disposition: inline
In-Reply-To: <20171006103623.GA3314@codeblueprint.co.uk>
User-Agent: Mutt/1.5.24+42 (6e565710a064) (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@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?