On Mon, Apr 18, 2011 at 8:28 PM, Jens Axboe <jaxboe@xxxxxxxxxxxx> wrote:
> On 2011-04-18 20:21, Bart Van Assche wrote:
>> a performance regression in the block layer not related to the md
>> issue. If I run a small block IOPS test on a block device created by
>> ib_srp (NOOP scheduler) I see about 11% less IOPS than with 2.6.38.3
>> (155.000 IOPS with 2.6.38.3 and 140.000 IOPS with 2.6.39-rc3+).
>
> That's not good. What's the test case?
Nothing more than a fio IOPS test:
fio --bs=512 --ioengine=libaio --buffered=0 --rw=read --thread
--iodepth=64 --numjobs=2 --loops=10000 --group_reporting --size=1G
--gtod_reduce=1 --name=iops-test --filename=/dev/${dev} --invalidate=1
Bart.
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