From: Shirley Ma <mashirle@us.ibm.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
Krishna Kumar2 <krkumar2@in.ibm.com>,
David Miller <davem@davemloft.net>,
kvm@vger.kernel.org, netdev@vger.kernel.org, steved@us.ibm.com,
Tom Lendacky <tahm@linux.vnet.ibm.com>
Subject: Re: Network performance with small packets - continued
Date: Wed, 09 Mar 2011 08:38:02 -0800 [thread overview]
Message-ID: <1299688682.25664.111.camel@localhost.localdomain> (raw)
In-Reply-To: <20110309163201.GC7165@redhat.com>
On Wed, 2011-03-09 at 18:32 +0200, Michael S. Tsirkin wrote:
> I think your issues are with TX overrun.
> Besides delaying IRQ on TX, I don't have many ideas.
>
> The one interesting thing is that you see better speed
> if you drop packets. netdev crowd says this should not happen,
> so could be an indicator of a problem somewhere.
Yes, I am looking at why guest didn't see see used_buffers on time from
vhost send TX completion I am trying to collect some data on vhost.
I also wonder whether it's a scheduler issue.
Thanks
Shirley
next prev parent reply other threads:[~2011-03-09 16:38 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-07 22:31 Network performance with small packets - continued Tom Lendacky
2011-03-09 2:34 ` Chigurupati, Chaks
2011-03-09 7:15 ` Michael S. Tsirkin
2011-03-09 7:15 ` Michael S. Tsirkin
2011-03-09 15:45 ` Shirley Ma
2011-03-09 16:10 ` Michael S. Tsirkin
2011-03-09 16:25 ` Shirley Ma
2011-03-09 16:32 ` Michael S. Tsirkin
2011-03-09 16:38 ` Shirley Ma [this message]
2011-03-09 16:09 ` Tom Lendacky
2011-03-09 16:21 ` Shirley Ma
2011-03-09 16:28 ` Michael S. Tsirkin
2011-03-09 16:51 ` Shirley Ma
2011-03-09 17:16 ` Michael S. Tsirkin
2011-03-09 18:16 ` Shirley Ma
2011-03-09 22:51 ` Tom Lendacky
2011-03-09 20:11 ` Tom Lendacky
2011-03-09 21:56 ` Michael S. Tsirkin
2011-03-09 23:25 ` Tom Lendacky
2011-03-10 6:54 ` Michael S. Tsirkin
2011-03-10 15:23 ` Tom Lendacky
2011-03-10 15:34 ` Michael S. Tsirkin
2011-03-10 17:16 ` Tom Lendacky
2011-03-18 15:38 ` Tom Lendacky
2011-03-10 0:59 ` Shirley Ma
2011-03-10 2:30 ` Rick Jones
2011-03-09 22:45 ` Shirley Ma
2011-03-09 22:57 ` Tom Lendacky
2011-03-09 7:17 ` Michael S. Tsirkin
2011-03-09 16:17 ` Tom Lendacky
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