Re: [Bug #32982] Kernel locks up a few minutes after boot

[Bart Van Assche]

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/