From: "Michael S. Tsirkin" <mst@redhat.com>
To: Shirley Ma <mashirle@us.ibm.com>
Cc: David Miller <davem@davemloft.net>,
netdev@vger.kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 1/1] vhost: TX used buffer guest signal accumulation
Date: Fri, 29 Oct 2010 10:12:56 +0200 [thread overview]
Message-ID: <20101029081256.GD22688@redhat.com> (raw)
In-Reply-To: <1288296835.11251.24.camel@localhost.localdomain>
On Thu, Oct 28, 2010 at 01:13:55PM -0700, Shirley Ma wrote:
> On Thu, 2010-10-28 at 12:32 -0700, Shirley Ma wrote:
> > Also I found a big TX regression for old guest and new guest. For old
> > guest, I am able to get almost 11Gb/s for 2K message size, but for the
> > new guest kernel, I can only get 3.5 Gb/s with the patch and same
> > host.
> > I will dig it why.
>
> The regression is from guest kernel, not from this patch. Tested 2.6.31
> kernel, it's performance is less than 2Gb/s for 2K message size already.
> I will resubmit the patch for review.
>
> I will start to test from 2.6.30 kernel to figure it when TX regression
> induced in virtio_net. Any suggestion which guest kernel I should test
> to figure out this regression?
>
> Thanks
> Shirley
git bisect 2.6.31 2.6.30
and go from here.
next prev parent reply other threads:[~2010-10-29 8:13 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-27 21:58 [RFC PATCH 1/1] vhost: TX used buffer guest signal accumulation Shirley Ma
2010-10-28 4:40 ` Shirley Ma
2010-10-28 5:20 ` Michael S. Tsirkin
2010-10-28 15:24 ` Shirley Ma
2010-10-28 17:14 ` Shirley Ma
2010-10-29 8:10 ` Michael S. Tsirkin
2010-10-29 15:43 ` Shirley Ma
2010-10-30 20:06 ` Michael S. Tsirkin
2010-11-01 20:17 ` Shirley Ma
2010-11-03 10:48 ` Michael S. Tsirkin
2010-11-04 5:38 ` Shirley Ma
2010-11-04 9:30 ` Michael S. Tsirkin
2010-11-04 21:37 ` Shirley Ma
2010-10-28 19:32 ` Shirley Ma
2010-10-28 20:13 ` Shirley Ma
2010-10-28 21:04 ` Sridhar Samudrala
2010-10-28 21:40 ` Shirley Ma
2010-10-29 8:11 ` Michael S. Tsirkin
2010-10-29 8:12 ` Michael S. Tsirkin [this message]
2010-10-29 8:03 ` Michael S. Tsirkin
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=20101029081256.GD22688@redhat.com \
--to=mst@redhat.com \
--cc=davem@davemloft.net \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mashirle@us.ibm.com \
--cc=netdev@vger.kernel.org \
/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.