Date: Tue, 28 Jan 2014 21:37:26 -0500 From: J David <j.david.lists@gmail.com> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: freebsd-net@freebsd.org, Garrett Wollman <wollman@freebsd.org> Subject: Re: Terrible NFS performance under 9.2-RELEASE? Message-ID: <CABXB=RQj2evY7=Q0_7vbHrQrH3fPkW774gjNxWLwWbRXMzjdDA@mail.gmail.com> In-Reply-To: <312973812.17975525.1390955533440.JavaMail.root@uoguelph.ca> References: <CABXB=RQksyZq43=jLw3wJT5vLzuK4h5cgE=Lj4caq1RgOBa8gA@mail.gmail.com> <312973812.17975525.1390955533440.JavaMail.root@uoguelph.ca>
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On Tue, Jan 28, 2014 at 7:32 PM, Rick Macklem <rmacklem@uoguelph.ca> wrote: > Hopefully Garrett and/or you will be able to do some testing of it > and report back w.r.t. performance gains, etc. OK, it has seen light testing. As predicted the vtnet drops are eliminated and CPU load is reduced. The performance is also improved: Test Before After SeqWr 1506 7461 SeqRd 566 192015 RndRd 602 218730 RndWr 44 13972 All numbers in kiB/sec. There were initially still some problems with lousy hostcache values on the client after the test, which is what causes the iperf performance to tank after the NFS test, but after a reboot of both sides and fresh retest, I haven't reproduced that again. If it comes back, I'll try to figure out what's going on. But this definitely looks like a move in the right direction. Thanks!
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