Messages in this thread | | | Date | Tue, 20 Jan 2009 15:22:12 -0500 | Subject | Re: [RFC PATCH] block: Fix bio merge induced high I/O latency | From | Ben Gamari <> |
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On Tue, Jan 20, 2009 at 2:37 AM, Jens Axboe <jens.axboe@oracle.com> wrote: > On Mon, Jan 19 2009, Mathieu Desnoyers wrote: >> * Jens Axboe (jens.axboe@oracle.com) wrote: >> Yes, ideally I should re-run those directly on the disk partitions. > > At least for comparison. >
I just completed my own set of benchmarks using the fio job file Mathieu provided. This was on a 2.5 inch 7200 RPM SATA partition formatted as ext3. As you can see, I tested all of the available schedulers with both queuing enabled and disabled. I'll test the Jens' patch soon. Would a blktrace of the fio run help? Let me know if there's any other benchmarking or profiling that could be done. Thanks,
- Ben
mint maxt ========================================================== queue_depth=31: anticipatory 35 msec 11036 msec cfq 37 msec 3350 msec deadline 36 msec 18144 msec noop 39 msec 41512 msec
========================================================== queue_depth=1: anticipatory 45 msec 9561 msec cfq 28 msec 3974 msec deadline 47 msec 16802 msec noop 35 msec 38173 msec
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