From: Bart Van Assche <bvanassche@acm.org>
To: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Cc: Jens Axboe <axboe@kernel.dk>,
Anthony Liguori <aliguori@us.ibm.com>,
kvm-devel <kvm@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
lf-virt <virtualization@lists.linux-foundation.org>,
Anthony Liguori <aliguori@linux.vnet.ibm.com>,
target-devel <target-devel@vger.kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Zhi Yong Wu <wuzhy@cn.ibm.com>, Christoph Hellwig <hch@lst.de>,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Subject: Re: [PATCH 0/6] tcm_vhost/virtio-scsi WIP code for-3.6
Date: Thu, 05 Jul 2012 17:53:24 +0000 [thread overview]
Message-ID: <4FF5D494.2090707__38558.0710987144$1341511534$gmane$org@acm.org> (raw)
In-Reply-To: <1341453135.23954.214.camel@haakon2.linux-iscsi.org>
On 07/05/12 01:52, Nicholas A. Bellinger wrote:
> fio randrw workload | virtio-scsi-raw | virtio-scsi+tcm_vhost | bare-metal raw block
> ------------------------------------------------------------------------------------
> 25 Write / 75 Read | ~15K | ~45K | ~70K
> 75 Write / 25 Read | ~20K | ~55K | ~60K
These numbers are interesting. To me these numbers mean that there is a
huge performance bottleneck in the virtio-scsi-raw storage path. Why is
the virtio-scsi-raw bandwidth only one third of the bare-metal raw block
bandwidth ?
Bart.
next prev parent reply other threads:[~2012-07-05 17:53 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-04 4:24 [PATCH 0/6] tcm_vhost/virtio-scsi WIP code for-3.6 Nicholas A. Bellinger
2012-07-04 4:24 ` [PATCH 1/6] vhost: Separate vhost-net features from vhost features Nicholas A. Bellinger
2012-07-04 4:41 ` Asias He
2012-07-04 4:24 ` [PATCH 2/6] vhost: make vhost work queue visible Nicholas A. Bellinger
2012-07-04 4:24 ` Nicholas A. Bellinger
2012-07-04 4:24 ` [PATCH 3/6] vhost: Add vhost_scsi specific defines Nicholas A. Bellinger
2012-07-04 4:24 ` Nicholas A. Bellinger
2012-07-04 4:24 ` [PATCH 4/6] tcm_vhost: Initial merge for vhost level target fabric driver Nicholas A. Bellinger
2012-07-05 17:47 ` Bart Van Assche
2012-07-05 17:47 ` Bart Van Assche
2012-07-05 17:59 ` Bart Van Assche
2012-07-05 17:59 ` Bart Van Assche
2012-07-04 4:24 ` Nicholas A. Bellinger
2012-07-04 4:24 ` [PATCH 5/6] virtio-scsi: Add vdrv->scan for post VIRTIO_CONFIG_S_DRIVER_OK LUN scanning Nicholas A. Bellinger
2012-07-04 4:24 ` Nicholas A. Bellinger
2012-07-04 14:50 ` Paolo Bonzini
2012-07-04 4:24 ` [PATCH 6/6] virtio-scsi: Set shost->max_id=1 for tcm_vhost WWPNs Nicholas A. Bellinger
2012-07-04 14:50 ` Paolo Bonzini
2012-07-05 2:05 ` Nicholas A. Bellinger
2012-07-05 6:42 ` Paolo Bonzini
2012-07-04 4:24 ` Nicholas A. Bellinger
2012-07-04 14:02 ` [PATCH 0/6] tcm_vhost/virtio-scsi WIP code for-3.6 Michael S. Tsirkin
2012-07-04 14:52 ` Paolo Bonzini
2012-07-04 15:05 ` Michael S. Tsirkin
2012-07-04 22:12 ` Anthony Liguori
2012-07-05 1:52 ` Nicholas A. Bellinger
2012-07-05 10:22 ` Paolo Bonzini
2012-07-05 13:53 ` Michael S. Tsirkin
2012-07-05 14:06 ` Anthony Liguori
2012-07-05 14:40 ` Michael S. Tsirkin
2012-07-05 14:47 ` Paolo Bonzini
2012-07-05 17:26 ` Michael S. Tsirkin
2012-07-06 3:01 ` Nicholas A. Bellinger
2012-07-06 5:43 ` SCSI Performance regression [was Re: [PATCH 0/6] tcm_vhost/virtio-scsi WIP code for-3.6] James Bottomley
2012-07-06 9:13 ` Nicholas A. Bellinger
2012-07-06 13:49 ` James Bottomley
2012-07-06 18:21 ` Nicholas A. Bellinger
2012-07-06 18:21 ` Nicholas A. Bellinger
2012-07-06 20:30 ` [Ksummit-2012-discuss] " Christoph Lameter
2012-07-06 20:30 ` Christoph Lameter
2012-07-06 22:06 ` Nicholas A. Bellinger
2012-07-06 22:06 ` Nicholas A. Bellinger
2012-07-06 3:01 ` [PATCH 0/6] tcm_vhost/virtio-scsi WIP code for-3.6 Nicholas A. Bellinger
2012-07-05 14:06 ` Anthony Liguori
2012-07-05 14:32 ` Paolo Bonzini
2012-07-05 21:00 ` Michael S. Tsirkin
2012-07-06 3:38 ` Nicholas A. Bellinger
2012-07-06 5:39 ` Paolo Bonzini
2012-07-05 17:53 ` Bart Van Assche [this message]
2012-07-05 17:53 ` Bart Van Assche
2012-07-05 19:57 ` Bart Van Assche
2012-07-10 0:29 ` Nicholas A. Bellinger
2012-07-10 0:29 ` Nicholas A. Bellinger
2012-07-05 2:01 ` Nicholas A. Bellinger
2012-07-05 2:01 ` Nicholas A. Bellinger
2012-07-05 9:31 ` Michael S. Tsirkin
2012-07-06 3:13 ` Nicholas A. Bellinger
-- strict thread matches above, loose matches on Subject: below --
2012-07-04 4:24 Nicholas A. Bellinger
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='4FF5D494.2090707__38558.0710987144$1341511534$gmane$org@acm.org' \
--to=bvanassche@acm.org \
--cc=aliguori@linux.vnet.ibm.com \
--cc=aliguori@us.ibm.com \
--cc=axboe@kernel.dk \
--cc=hch@lst.de \
--cc=kvm@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=mst@redhat.com \
--cc=nab@linux-iscsi.org \
--cc=pbonzini@redhat.com \
--cc=stefanha@linux.vnet.ibm.com \
--cc=target-devel@vger.kernel.org \
--cc=virtualization@lists.linux-foundation.org \
--cc=wuzhy@cn.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.