From mboxrd@z Thu Jan 1 00:00:00 1970 From: kbusch@kernel.org (Keith Busch) Date: Wed, 24 Jul 2019 09:12:01 -0600 Subject: nvme statistics : iostat vs sar In-Reply-To: References: Message-ID: <20190724151200.GA5379@localhost.localdomain> 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