From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754723AbaBSRHg (ORCPT ); Wed, 19 Feb 2014 12:07:36 -0500 Received: from demumfd001.nsn-inter.net ([93.183.12.32]:14154 "EHLO demumfd001.nsn-inter.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754234AbaBSRHe (ORCPT ); Wed, 19 Feb 2014 12:07:34 -0500 Message-ID: <5304E49A.3000801@nsn.com> Date: Wed, 19 Feb 2014 18:06:34 +0100 From: Matija Glavinic Pecotic User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20131104 Icedove/17.0.10 MIME-Version: 1.0 To: ext Fengguang Wu CC: LKML , Linux Netdev List , "linux-sctp@vger.kernel.org" Subject: Re: [sctp] ef2820a735: -50% netperf Throughput_Mbps References: <20140219132034.GC8704@localhost> In-Reply-To: <20140219132034.GC8704@localhost> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 5006 X-purgate-ID: 151667::1392829650-00005322-69FE4D5D/0-0/0-0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Fengguang, On 02/19/2014 02:20 PM, ext Fengguang Wu wrote: > Hi Matija, > > We noticed the below changes on commit ef2820a735f74ea60335f8ba3801b844f0cb184d > (" net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer") > in netperf SCTP_STREAM tests: thanks for the info. Though, I've ran netperf in my environment, with and without patch, and I havent observed any difference. Could you please give me information on your environment, how do you invoke netperf, and other details you think I might be interested in to observe problem by myself Thanks! > cd0f0b95fd2cd2b ef2820a735f74ea60335f8ba3 > --------------- ------------------------- > 8 ~ 0% -50.0% 4 ~ 0% TOTAL netperf.Throughput_Mbps > 54287 ~44% +338.1% 237842 ~48% TOTAL cpuidle.C1E-NHM.time > 12008353 ~12% -56.0% 5281848 ~ 0% TOTAL proc-vmstat.pgalloc_normal > 114861 ~ 0% -50.3% 57085 ~ 3% TOTAL softirqs.NET_RX > 12964639 ~11% -55.1% 5818663 ~ 0% TOTAL proc-vmstat.pgfree > 866489 ~ 0% -43.3% 491417 ~ 0% TOTAL proc-vmstat.pgalloc_dma32 > 119373 ~17% -39.1% 72661 ~ 1% TOTAL softirqs.SCHED > 1985 ~13% -24.3% 1502 ~19% TOTAL slabinfo.kmalloc-128.active_objs > 2139 ~20% -28.4% 1532 ~ 4% TOTAL proc-vmstat.nr_alloc_batch > 124360 ~33% -31.0% 85748 ~ 2% TOTAL softirqs.RCU > 1977 ~ 9% -18.5% 1610 ~ 9% TOTAL slabinfo.UDP.active_objs > 1977 ~ 9% -18.5% 1610 ~ 9% TOTAL slabinfo.UDP.num_objs > 2066 ~ 6% -12.9% 1800 ~ 7% TOTAL slabinfo.kmalloc-128.num_objs > 1738 ~10% -18.4% 1418 ~ 9% TOTAL slabinfo.UDPv6.active_objs > 1738 ~10% -18.4% 1418 ~ 9% TOTAL slabinfo.UDPv6.num_objs > 923 ~10% -17.7% 760 ~ 8% TOTAL slabinfo.TCPv6.active_objs > 923 ~10% -17.7% 760 ~ 8% TOTAL slabinfo.TCPv6.num_objs > 989 ~ 9% -17.1% 820 ~ 7% TOTAL slabinfo.TCP.active_objs > 989 ~ 9% -17.1% 820 ~ 7% TOTAL slabinfo.TCP.num_objs > 398761 ~44% -32.6% 268792 ~ 3% TOTAL numa-vmstat.node2.numa_hit > 389672 ~49% -32.9% 261443 ~ 3% TOTAL numa-vmstat.node0.numa_hit > 447 ~ 1% -13.8% 385 ~ 0% TOTAL vmstat.system.cs > > Note: the "~ XX%" numbers are stddev percent. > > netperf.Throughput_Mbps > > 4 *+-*--*--*--*-*--*--*--*--*--*--*--*-*--*--*--*--*--*--*--*-*--*--*--* > | | > | | > 3.5 ++ | > | | > | | > | | > 3 ++ | > | | > | | > 2.5 ++ | > | | > | | > | | > 2 O+-O--O--O--O-O--O--O--O--O--O--O--O-O--O--O--O--O--O--O-------------+ > > > vmstat.system.cs > > 460 ++------------------------*--*----------------*----------------------+ > | .*.. .*.. : + + *.. .* > 450 ++ *. .*. *.. : + .*..*.. + *..*..*.. + .*. | > 440 *+ : * : *..* * * *. | > |: : * | > 430 ++: : | > 420 ++: : | > | * | > 410 ++ | > 400 ++ | > | | > 390 ++ O O O O O | > 380 O+ O O O O O O O O O O O O O | > | O | > 370 ++-------------------------------------------------------------------+ >