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Date: Wed, 29 Jan 2014 18:03:06 -0500 (EST)
From: Rick Macklem <rmacklem@uoguelph.ca>
To: J David <j.david.lists@gmail.com>
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Subject: Re: Terrible NFS performance under 9.2-RELEASE?
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Cc: freebsd-net@freebsd.org, Garrett Wollman <wollman@freebsd.org>
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J David wrote:
> 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.
> 
Oh, and I forgot to say thanks for doing this testing, rick

> 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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