Re: Unable to replay blktrace with mixed workload

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On 04/23/2015 01:55 PM, Brandon Schwartz wrote:
Using FIO 2.2.7, I'm trying to replay the following workload
(capturing it with blktrace and replaying with FIO on the same device)

  sudo fio --name=rwmix --filename=/dev/sdd --blocksize=128k
--readwrite=randrw --rwmixread=75 --rwmixwrite=25 --runtime=60

And I get the following error:

fio: pid=21428, err=12/file:memory.c:242, func=iomem allocation,
error=Cannot allocate memory

Older versions of FIO (2.1.*) seem to be able to replay the blktrace
without that error, but those versions of FIO don't always seem to
respect the timing of IOs (if there is idle time for example).

Any idea what could be causing the problem?

There were a few bugs in there. Can you try current -git? Just committed a change that should improve things for you.

--
Jens Axboe

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