From: stephen@networkplumber.org (Stephen Hemminger)
Subject: NVM and swap device
Date: Wed, 20 Jan 2016 13:30:06 -0800 [thread overview]
Message-ID: <20160120133006.483d8ebb@xeon-e3> (raw)
In-Reply-To: <56969DAD.5050602@fb.com>
On Wed, 13 Jan 2016 11:55:41 -0700
Jens Axboe <axboe@fb.com> wrote:
> I'd run something that just beats up on it, reads and writes. If you
> have fio installed, something ala:
>
> fio --ioengine=libaio --iodepth=8 --direct=1 --bs=4k
> --filename=/dev/nvme0n1 --numjobs=4 --norandommap --runtime=1h
> --time_based=1 --name=reads --rw=randread --name=writes --rw=randwrite
>
> This will run 4 processes that randomly read from the device, and 4 that
> randomly write. Replace /dev/nvme0n1 with your swap partition. The test
> will run for 1 hour.
The fio test ran fine without errors. I am beginning to think it something
unique to how I/O in swap path gets done.
Will turn it back on for swap and see what happens.
next prev parent reply other threads:[~2016-01-20 21:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-13 3:40 NVM and swap device Stephen Hemminger
2016-01-13 8:26 ` Hannes Reinecke
2016-01-13 15:13 ` Matthew Wilcox
2016-01-13 17:47 ` Jens Axboe
2016-01-13 18:51 ` Stephen Hemminger
2016-01-13 18:55 ` Jens Axboe
2016-01-20 21:30 ` Stephen Hemminger [this message]
2016-01-15 17:42 ` Keith Busch
2016-01-15 18:18 ` Stephen Hemminger
2016-01-15 18:20 ` Stephen Hemminger
2016-01-15 21:19 ` Keith Busch
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