From: Stefan Priebe <s.priebe@profihost.ag>
To: qemu-devel <qemu-devel@nongnu.org>
Subject: [Qemu-devel] virtio-scsi vs. virtio-blk
Date: Wed, 08 Aug 2012 17:21:30 +0200 [thread overview]
Message-ID: <502283FA.2080506@profihost.ag> (raw)
Hello list,
i wanted to start using virtio-scsi instead of virtio-blk, cause it
offers the possibility to use discard / trim support.
Kernel: 3.5.0 on host and guest
Qemu-kvm: 1.1.1 stable
But i'm not seeing the same or nearly the same speed:
virtio-scsi:
rand. 4k:
write: io=677628KB, bw=67709KB/s, iops=16927, runt= 10008msec
read : io=697648KB, bw=69646KB/s, iops=17411, runt= 10017msec
seq 4m:
write: io=8192MB, bw=817683KB/s, iops=199, runt= 10259msec
read : io=5672MB, bw=565378KB/s, iops=138, runt= 10273msec
virtio-blk:
rand. 4k:
write: io=1750MB, bw=179169KB/s, iops=44792, runt= 10001msec
read : io=1388MB, bw=142073KB/s, iops=35518, runt= 10006msec
seq 4m:
write: io=9776MB, bw=984522KB/s, iops=240, runt= 10168msec
read : io=2980MB, bw=288970KB/s, iops=70, runt= 10560msec
Any ideas?
Greets,
Stefan
next reply other threads:[~2012-08-08 15:21 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-08 15:21 Stefan Priebe [this message]
2012-08-08 16:17 ` [Qemu-devel] virtio-scsi vs. virtio-blk Paolo Bonzini
2012-08-08 17:12 ` Stefan Priebe
2012-08-08 17:37 ` Paolo Bonzini
2012-08-09 6:13 ` Stefan Priebe
2012-08-09 7:01 ` Paolo Bonzini
2012-08-09 7:07 ` Stefan Priebe
2012-08-09 7:19 ` Paolo Bonzini
2012-08-09 7:41 ` Stefan Priebe
2012-08-09 7:53 ` Paolo Bonzini
2012-08-09 8:00 ` Stefan Priebe
2012-08-09 8:03 ` Paolo Bonzini
2012-08-09 9:18 ` Stefan Hajnoczi
2012-08-09 10:17 ` Stefan Priebe - Profihost AG
2012-08-09 11:04 ` Stefan Hajnoczi
2012-08-09 11:10 ` Paolo Bonzini
2012-08-09 11:24 ` Stefan Priebe - Profihost AG
2012-08-09 12:08 ` Stefan Priebe - Profihost AG
2012-08-09 12:19 ` Paolo Bonzini
2012-08-09 12:31 ` Stefan Priebe - Profihost AG
2012-08-09 12:44 ` Paolo Bonzini
2012-08-09 15:41 ` Stefan Priebe - Profihost AG
2012-08-09 12:52 ` ronnie sahlberg
2012-08-09 13:15 ` Paolo Bonzini
2012-08-09 13:39 ` Stefan Priebe - Profihost AG
2012-08-09 13:42 ` Paolo Bonzini
2012-08-09 13:52 ` Stefan Priebe - Profihost AG
2012-08-09 14:35 ` Paolo Bonzini
2012-08-09 14:25 ` Stefan Priebe - Profihost AG
2012-08-10 9:22 ` Stefan Priebe - Profihost AG
2012-08-10 10:20 ` Paolo Bonzini
2012-08-10 10:28 ` Stefan Priebe - Profihost AG
2012-08-10 10:30 ` Paolo Bonzini
2012-08-10 11:12 ` ronnie sahlberg
2012-08-10 11:57 ` Stefan Priebe - Profihost AG
2012-08-10 12:04 ` ronnie sahlberg
2012-08-10 12:14 ` Stefan Priebe - Profihost AG
2012-08-10 12:24 ` ronnie sahlberg
2012-08-10 12:35 ` Stefan Priebe - Profihost AG
2012-08-10 12:39 ` Paolo Bonzini
2012-08-10 12:43 ` Stefan Priebe - Profihost AG
2012-08-10 11:20 ` ronnie sahlberg
2012-08-10 11:54 ` Stefan Priebe - Profihost AG
2012-08-10 11:58 ` ronnie sahlberg
2012-08-10 12:38 ` Stefan Priebe - Profihost AG
2012-08-10 11:49 ` Stefan Priebe - Profihost AG
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