Date: Mon, 29 Sep 2008 12:00:11 +0200 From: "Claus Guttesen" <kometen@gmail.com> To: "Danny Braniss" <danny@cs.huji.ac.il> Cc: freebsd-stable@freebsd.org Subject: Re: bad NFS/UDP performance Message-ID: <b41c75520809290300m465bc8f1jd3e7a5a800b776d3@mail.gmail.com> In-Reply-To: <E1KkFET-000A7V-CO@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> <E1KkFET-000A7V-CO@cs1.cs.huji.ac.il>
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On Mon, Sep 29, 2008 at 11:39 AM, Danny Braniss <danny@cs.huji.ac.il> wrote: >> > it more difficult than I expected. >> > for one, the kernel date was missleading, the actual source update is the key, so >> > the window of changes is now 28/July to 19/August. I have the diffs, but nothing >> > yet seems relevant. >> > >> > on the other hand, I tried NFS/TCP, and there things seem ok, ie the 'good' and the 'bad' >> > give the same throughput, which seem to point to UDP changes ... >> >> Can you post the network-numbers? > [again :-] Thank you. :-) Was not shure whether tcp gave you same performance compared to udp or tcp-performance was stable throughout the same period where udp would degrade. >> > Writing 16 MB file >> > BS Count /---- 7.0 ------/ /---- 7.1 -----/ > > should now read: > /---- Aug 18 ------/ /--- Aug 19 ----/ >> > 1*512 32768 0.16s 98.11MB/s 0.43s 37.18MB/s >> > 2*512 16384 0.17s 92.04MB/s 0.46s 34.79MB/s >> > 4*512 8192 0.16s 101.88MB/s 0.43s 37.26MB/s >> > 8*512 4096 0.16s 99.86MB/s 0.44s 36.41MB/s >> > 16*512 2048 0.16s 100.11MB/s 0.50s 32.03MB/s >> > 32*512 1024 0.26s 61.71MB/s 0.46s 34.79MB/s >> > 64*512 512 0.22s 71.45MB/s 0.45s 35.41MB/s >> > 128*512 256 0.21s 77.84MB/s 0.51s 31.34MB/s >> > 256*512 128 0.19s 82.47MB/s 0.43s 37.22MB/s >> > 512*512 64 0.18s 87.77MB/s 0.49s 32.69MB/s >> > 1024*512 32 0.18s 89.24MB/s 0.47s 34.02MB/s >> > 2048*512 16 0.17s 91.81MB/s 0.30s 53.41MB/s >> > 4096*512 8 0.16s 100.56MB/s 0.42s 38.07MB/s >> > 8192*512 4 0.82s 19.56MB/s 0.80s 19.95MB/s >> > 16384*512 2 0.82s 19.63MB/s 0.95s 16.80MB/s >> > 32768*512 1 0.81s 19.69MB/s 0.96s 16.64MB/s >> > >> > Average: 75.86 33.00 -- regards Claus When lenity and cruelty play for a kingdom, the gentler gamester is the soonest winner. Shakespeare
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