netdev - Re: [v2 RFC PATCH 0/4] Implement multiqueue virtio-net

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Message-ID: <cover.1286372004.git.mst@redhat.com>
Date:	Wed, 6 Oct 2010 15:34:31 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Krishna Kumar <krkumar2@...ibm.com>
Cc:	rusty@...tcorp.com.au, davem@...emloft.net, kvm@...r.kernel.org,
	arnd@...db.de, netdev@...r.kernel.org, avi@...hat.com,
	anthony@...emonkey.ws
Subject: Re: [v2 RFC PATCH 0/4] Implement multiqueue virtio-net

On Fri, Sep 17, 2010 at 03:33:07PM +0530, Krishna Kumar wrote:
> For 1 TCP netperf, I ran 7 iterations and summed it. Explanation
> for degradation for 1 stream case:

I thought about possible RX/TX contention reasons, and I realized that
we get/put the mm counter all the time.  So I write the following: I
haven't seen any performance gain from this in a single queue case, but
maybe this will help multiqueue?

Thanks,

Michael S. Tsirkin (2):
  vhost: put mm after thread stop
  vhost-net: batch use/unuse mm

 drivers/vhost/net.c   |    7 -------
 drivers/vhost/vhost.c |   16 ++++++++++------
 2 files changed, 10 insertions(+), 13 deletions(-)

-- 
1.7.3-rc1
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