From owner-freebsd-stable@freebsd.org Tue Aug 25 16:45:20 2015 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C914F99A7D4 for ; Tue, 25 Aug 2015 16:45:20 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id B0E8FF3B for ; Tue, 25 Aug 2015 16:45:20 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: by mailman.ysv.freebsd.org (Postfix) id AE45499A7D3; Tue, 25 Aug 2015 16:45:20 +0000 (UTC) Delivered-To: stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id ADDAF99A7D2 for ; Tue, 25 Aug 2015 16:45:20 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 68825F39 for ; Tue, 25 Aug 2015 16:45:20 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from slw by zxy.spb.ru with local (Exim 4.84 (FreeBSD)) (envelope-from ) id 1ZUHLQ-0003sB-A9; Tue, 25 Aug 2015 19:45:08 +0300 Date: Tue, 25 Aug 2015 19:45:08 +0300 From: Slawa Olhovchenkov To: Gerrit =?koi8-r?Q?K=22uhn?= Cc: Rick Macklem , stable@freebsd.org Subject: Re: dev.ix.0.queueX.interrupt_rate Message-ID: <20150825164508.GH21849@zxy.spb.ru> References: <20150824192926.GL3158@zxy.spb.ru> <20150825095448.53458554a4ee7f96129a2d70@aei.mpg.de> <202540715.30987815.1440503749374.JavaMail.zimbra@uoguelph.ca> <20150825160441.48ed35049f5947f0dbbaa801@aei.mpg.de> MIME-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline In-Reply-To: <20150825160441.48ed35049f5947f0dbbaa801@aei.mpg.de> User-Agent: Mutt/1.5.23 (2014-03-12) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: slw@zxy.spb.ru X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Aug 2015 16:45:20 -0000 On Tue, Aug 25, 2015 at 04:04:41PM +0200, Gerrit K"uhn wrote: > On Tue, 25 Aug 2015 07:55:49 -0400 (EDT) Rick Macklem > wrote about Re: dev.ix.0.queueX.interrupt_rate: > > > RM> If you have tso enabled, you could try this patch: > RM> https://reviews.freebsd.org/D3477 > RM> > RM> If TSO is disabled, then we don't have an explanation for poor NFS > RM> performance yet. > > I tried both with or without TSO, and it does not appear to make any > difference for me. I get about 50MB/s net write speed and about 200MB/s > read. Even my 1GBE interface perform better in terms of writing. > > RM> If you haven't seen it, you might want to keep an eye > RM> on this thread: http://docs.FreeBSD.org/cgi/mid.cgi?55DC1B5A.8010109 > > Yes, I am watching this. Thanks for the pointer. For discover poor network performance you need: 1. check cables 2. capture interface statisctics from all ports on paths on network switchs 3. capture NIC statisctics on hosts (netstat -nbeI) 4. ifconfig -a 5. netstat -rn 6. /var/log/dmesg.boot