Date: Tue, 25 Aug 2015 19:45:08 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Gerrit =?koi8-r?Q?K=22uhn?= <gerrit.kuehn@aei.mpg.de> Cc: Rick Macklem <rmacklem@uoguelph.ca>, stable@freebsd.org Subject: Re: dev.ix.0.queueX.interrupt_rate Message-ID: <20150825164508.GH21849@zxy.spb.ru> In-Reply-To: <20150825160441.48ed35049f5947f0dbbaa801@aei.mpg.de> References: <20150824192926.GL3158@zxy.spb.ru> <20150825095448.53458554a4ee7f96129a2d70@aei.mpg.de> <202540715.30987815.1440503749374.JavaMail.zimbra@uoguelph.ca> <20150825160441.48ed35049f5947f0dbbaa801@aei.mpg.de>
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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 > <rmacklem@uoguelph.ca> 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
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