Messages in this thread | | | From | Jeff Moyer <> | Subject | Re: [patch v4 0/3] aio: implement request batching [more performance numbers] | Date | Tue, 06 Oct 2009 13:45:03 -0400 |
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Here's a mail I got from Nathan Roberts.
Cheers, Jeff
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Similar test as before. I had to re-upload the files so comparing against last time isn't really apples-apples.
Disk is a cciss logical drive consisting of 12 SATA drives in a RAID6 configuration with 128K stripes.
Test case 1 is to read 1 million random 40K files (no file is read more than once), 16 4K iocbs at a time, 100 threads.
Test case 2 is the same except 100,000 128K files are read.
Unit of measure is "files read per second".
40K ------------------------------------------------- Kernel NOOP ------ ---- 2.6.30.5 682 2.6.30.5 (w/o drop_caches) 718 2.6.30.5+patch_v4 900 2.6.30.5+patch_v4 (w/o drop caches) 965
128K ------------------------------------------------- Kernel NOOP ------ ---- 2.6.30.5 242 2.6.30.5 (w/o drop_caches) 350 2.6.30.5+patch_v4 292 2.6.30.5+patch_v4 (w/o drop caches) 420
Hope it helps. Nathan
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