From: kbusch@kernel.org (Keith Busch)
Subject: nvme statistics : iostat vs sar
Date: Wed, 24 Jul 2019 09:12:01 -0600 [thread overview]
Message-ID: <20190724151200.GA5379@localhost.localdomain> (raw)
In-Reply-To: <D4F9A3CB-489A-4946-ADF2-C7C17A21E076@oracle.com>
On Wed, Jul 24, 2019@09:51:36AM -0500, John Donnelly wrote:
> Hi,
>
> I noticed nvme I/O does not appear in sar disk data (-d ) , but it does appear with sar block (-b) and iostat.
>
> Is this expected ?
'sar -d' should show activity. It does work as expected on my test machine:
# ls -l /dev/nvme*n*
brw-rw----. 1 root disk 259, 0 May 23 09:07 /dev/nvme0n1
brw-rw----. 1 root disk 259, 1 May 23 09:07 /dev/nvme1n1
brw-rw----. 1 root disk 259, 2 May 23 09:07 /dev/nvme2n1
brw-rw----. 1 root disk 259, 3 May 23 09:07 /dev/nvme3n1
# sar -d 2 10
Linux 5.2.0-rc1+ (localhost.localdomain) 07/24/2019 _x86_64_ (112 CPU)
09:03:06 AM DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util
09:03:08 AM dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:08 AM dev253-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:08 AM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:08 AM dev259-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:08 AM dev259-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:08 AM dev259-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:08 AM dev259-3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:08 AM DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util
09:03:10 AM dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:10 AM dev253-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:10 AM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:10 AM dev259-1 26370.50 105482.00 0.00 4.00 0.00 0.02 0.00 12.75
09:03:10 AM dev259-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:10 AM dev259-2 26384.00 105532.00 0.00 4.00 0.00 0.03 0.00 12.75
09:03:10 AM dev259-3 26389.50 105556.00 0.00 4.00 0.00 0.02 0.00 12.75
09:03:10 AM DEV tps rkB/s wkB/s areq-sz aqu-sz await svctm %util
09:03:12 AM dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:12 AM dev253-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:12 AM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:12 AM dev259-1 225306.00 901224.00 0.00 4.00 0.00 0.02 0.00 100.00
09:03:12 AM dev259-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
09:03:12 AM dev259-2 225304.50 901220.00 0.00 4.00 0.00 0.03 0.00 100.00
09:03:12 AM dev259-3 225306.50 901228.00 0.00 4.00 0.00 0.02 0.00 100.00
next prev parent reply other threads:[~2019-07-24 15:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 14:51 nvme statistics : iostat vs sar John Donnelly
2019-07-24 15:12 ` Keith Busch [this message]
2019-07-25 21:04 ` John Donnelly
2019-07-25 21:24 ` Keith Busch
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