From: Shirley Ma <mashirle@us.ibm.com>
To: "Michael S. Tsirkin" <mst@redhat.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: Thu, 28 Oct 2010 13:13:55 -0700 [thread overview]
Message-ID: <1288296835.11251.24.camel@localhost.localdomain> (raw)
In-Reply-To: <1288294355.11251.20.camel@localhost.localdomain>
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
next prev parent reply other threads:[~2010-10-28 20:13 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 [this message]
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
2010-10-29 8:03 ` Michael S. Tsirkin
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