Date: Sun, 5 Oct 2008 23:21:05 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Danny Braniss <danny@cs.huji.ac.il> Cc: freebsd-hackers@freebsd.org, freebsd-stable@freebsd.org, Robert Watson <watson@FreeBSD.org> Subject: Re: bad NFS/UDP performance Message-ID: <alpine.BSF.1.10.0810052319090.42465@fledge.watson.org> In-Reply-To: <E1Km0oo-00085m-D7@cs1.cs.huji.ac.il> References: <E1Kj7NA-000FXz-3F@cs1.cs.huji.ac.il> <20080926081806.GA19055@icarus.home.lan> <E1Kj9bR-000H7t-0g@cs1.cs.huji.ac.il> <20080926095230.GA20789@icarus.home.lan> <E1KjEZw-000KkH-GP@cs1.cs.huji.ac.il> <alpine.BSF.1.10.0809271114450.20117@fledge.watson.org> <E1KjY2h-0008GC-PP@cs1.cs.huji.ac.il> <b41c75520809290140i435a5f6dge5219cd03cad55fe@mail.gmail.com> <E1Klfac-000DzZ-Ie@cs1.cs.huji.ac.il> <alpine.BSF.1.10.0810030910351.41647@fledge.watson.org> <E1KlgYe-000Es2-8u@cs1.cs.huji.ac.il> <alpine.BSF.1.10.0810031003440.41647@fledge.watson.org> <E1KlgnA-000F6w-NT@cs1.cs.huji.ac.il> <alpine.BSF.1.10.0810031022140.41647@fledge.watson.org> <E1KlkgH-000Iv9-2A@cs1.cs.huji.ac.il> <alpine.BSF.1.10.0810031947400.63548@fledge.watson.org> <E1Km0oo-00085m-D7@cs1.cs.huji.ac.il>
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On Sat, 4 Oct 2008, Danny Braniss wrote: > at the moment, the best I can do is run it on a different hardware that has > if_em, the results are in > ftp://ftp.cs.huji.ac.il/users/danny/lock.prof/7.1-1000.em the > benchmark ran better with the Intel NIC, averaged UDP 54MB/s, TCP 53MB/s (I > get the same numbers with an older kernel). Dear Danny: Unfortunately, I was left slightly unclear on the comparison you are making above. Could you confirm whether or not, with if_em, you see a performance regression using UDP NFS between 7.0-RELEASE and the most recent 7.1-STABLE, and if you do, whether or not the RLOCK->WLOCK change has any effect on performance? It would be nice to know on the same hardware but at least with different hardware we get a sense of whether or not this might affect other systems or whether it's limited to a narrower set of configurations. Thanks, Robert N M Watson Computer Laboratory University of Cambridge
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