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Message-ID: <20061228095205.GG24765@elte.hu> Date: Thu, 28 Dec 2006 10:52:05 +0100 From: Ingo Molnar <mingo@...e.hu> To: Suparna Bhattacharya <suparna@...ibm.com> Cc: linux-aio@...ck.org, akpm@...l.org, drepper@...hat.com, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, jakub@...hat.com Subject: Re: [PATCHSET 1][PATCH 0/6] Filesystem AIO read/write * Suparna Bhattacharya <suparna@...ibm.com> wrote: > The following is a sampling of comparative aio-stress results with the > patches (each run starts with uncached files): > > --------------------------------------------- > > aio-stress throughput comparisons (in MB/s): > > file size 1GB, record size 64KB, depth 64, ios per iteration 8 > max io_submit 8, buffer alignment set to 4KB > 4 way Pentium III SMP box, Adaptec AIC-7896/7 Ultra2 SCSI, 40 MB/s > Filesystem: ext2 > > ---------------------------------------------------------------------------- > Buffered (non O_DIRECT) > Vanilla Patched O_DIRECT > ---------------------------------------------------------------------------- > Vanilla Patched > Random-Read 10.08 23.91 18.91, 18.98 > Random-O_SYNC-Write 8.86 15.84 16.51, 16.53 > Sequential-Read 31.49 33.00 31.86, 31.79 > Sequential-O_SYNC-Write 8.68 32.60 31.45, 32.44 > Random-Write 31.09 (19.65) 30.90 (19.65) > Sequential-Write 30.84 (28.94) 30.09 (28.39) the numbers look very convincing to me! Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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