Messages in this thread | | | Date | Fri, 1 Jul 2005 13:26:00 +0530 | From | Suparna Bhattacharya <> | Subject | aio-stress throughput regressions from 2.6.11 to 2.6.12 |
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Has anyone else noticed major throughput regressions for random reads/writes with aio-stress in 2.6.12 ? Or have there been any other FS/IO regressions lately ?
On one test system I see a degradation from around 17+ MB/s to 11MB/s for random O_DIRECT AIO (aio-stress -o3 testext3/rwfile5) from 2.6.11 to 2.6.12. It doesn't seem filesystem specific. Not good :(
BTW, Chris/Ben, it doesn't look like the changes to aio.c have had an impact (I copied those back to my 2.6.11 tree and tried the runs with no effect) So it is something else ...
Ideas/thoughts/observations ?
Regards Suparna
-- Suparna Bhattacharya (suparna@in.ibm.com) Linux Technology Center IBM Software Lab, India
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