Date: Mon, 06 Oct 2008 17:46:12 +0200 From: Danny Braniss <danny@cs.huji.ac.il> To: Robert Watson <rwatson@FreeBSD.org> Cc: freebsd-hackers@freebsd.org, freebsd-stable@freebsd.org Subject: Re: bad NFS/UDP performance Message-ID: <E1KmsHk-0003eV-G4@cs1.cs.huji.ac.il> In-Reply-To: <alpine.BSF.1.10.0810052319090.42465@fledge.watson.org> 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> <alpine.BSF.1.10.0810052319090.42465@fledge.watson.org>
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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, 7.1-1000.em vanilla 7.1 1 x Intel Core Duo 7.1-1000.x2200.em vanilla 7.1 2 x Dual-Core AMD Opteron 7.0-1000.x2200.em 7.0 + RLOCK->WLOCK the plot thickens. I put an em card in, and the throughput is almost the same than with the bge. all the tests were done on the same host, a Sun x2200/amd/2cpux2core except for the one over the weekend that is a intel Core Duo, and not the same if_em card, sorry about that but one has PCI X, the other PCI Express :-(. what is becoming obvious is that NFS/UDP is very temperamental/sensitive :-) danny
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