Date: Fri, 7 Mar 2008 15:16:28 -0500 From: John Nielsen <john@jnielsen.net> To: freebsd-scsi@freebsd.org Cc: Thomas Steen Rasmussen <thomas.rasmussen@siminn.dk>, Pierre Beyssac <beyssac@enst.fr> Subject: Re: iscsi initiator speed very low in FreeBSD 7 Message-ID: <200803071516.31640.john@jnielsen.net> In-Reply-To: <4A66E92B3FBF8541A78CD11D1C0E3CFC491D952199@wp-ex02.hq.webpartner.dk> References: <4A66E92B3FBF8541A78CD11D1C0E3CFC491D952009@wp-ex02.hq.webpartner.dk> <20080227125033.GA35933@bofh.enst.fr> <4A66E92B3FBF8541A78CD11D1C0E3CFC491D952199@wp-ex02.hq.webpartner.dk>
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On Tuesday 04 March 2008 03:46:15 am Thomas Steen Rasmussen wrote: > On Tuesday 26 February 2008 10:58:13 am Pierre Beyssac wrote: > > On Tue, Feb 26, 2008 at 01:37:09PM +0100, Thomas Steen Rasmussen > > wrote: > > > Windows Vista / Windows Server 2008 get impressive speeds from this > > > SAN (2008 got close to 800 megabits in one test). FreeBSD is not > > > even close to that speed. I have tried a bunch of different things, > > > but I always seem to end up with a speed close to 700 kilobits. This > > > is all on gigabit links. > > > > I've seen a similar problem (30-second timeout in the code due to > > a race condition). You might want to try the attached patch. It > > fixed the slowness for me. I intend to commit it to current very > > soon. > > The patch works! :) I had some problems getting it to apply cleanly, > due to a (junk?) character in the source file (the file being patched) > line 456. Once I got it applied to a fresh 7 install the speed was > considerably better. In my test setup I got to around 20 megabytes / > sec to or from my laptop initiator. I now need to test the production > server with the actual appliance SAN, and see what kind of speeds I get > there. I will revert with the results here. > > Until then, thank you very much for your assistance. This is good news! Pierre- would you like someone to create a PR with your patch to help it get committed or is that ball already rolling? Thanks, JN
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