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From: "Michael S. Tsirkin" <mst@redhat.com>
To: Krishna Kumar <krkumar2@in.ibm.com>
Cc: rusty@rustcorp.com.au, davem@davemloft.net, kvm@vger.kernel.org,
	arnd@arndb.de, netdev@vger.kernel.org, avi@redhat.com,
	anthony@codemonkey.ws
Subject: Re: [v2 RFC PATCH 0/4] Implement multiqueue virtio-net
Date: Wed, 6 Oct 2010 15:34:31 +0200	[thread overview]
Message-ID: <cover.1286372004.git.mst@redhat.com> (raw)

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

             reply	other threads:[~2010-10-06 13:41 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-06 13:34 Michael S. Tsirkin [this message]
2010-10-06 13:34 ` [PATCH 1/2] vhost: put mm after thread stop Michael S. Tsirkin
2010-10-06 13:34 ` [PATCH 2/2] vhost-net: batch use/unuse mm Michael S. Tsirkin
2010-10-06 17:02 ` [v2 RFC PATCH 0/4] Implement multiqueue virtio-net Krishna Kumar2
2010-10-11  7:21 ` Krishna Kumar2
2010-10-12 17:09   ` Michael S. Tsirkin
2010-10-14  7:58     ` Krishna Kumar2
2010-10-14  8:17       ` Michael S. Tsirkin
2010-10-14  9:04         ` Krishna Kumar2
     [not found]         ` <OFEC86A094.39835EBF-ON652577BC.002F9AAF-652577BC.003186B5@LocalDomain>
2010-10-14 12:17           ` Krishna Kumar2
     [not found]           ` <OF0BDA6B3A.F673A449-ON652577BC.00422911-652577BC.0043474B@LocalDomain>
2010-10-14 12:47             ` Krishna Kumar2
  -- strict thread matches above, loose matches on Subject: below --
2010-09-17 10:03 Krishna Kumar
2010-09-17 15:42 ` Sridhar Samudrala
2010-09-19 12:44 ` Michael S. Tsirkin
2010-10-05 10:40   ` Krishna Kumar2
2010-10-05 18:23     ` Michael S. Tsirkin
2010-10-06 17:43       ` Krishna Kumar2
2010-10-06 19:03         ` Michael S. Tsirkin
2010-10-06 12:19     ` Arnd Bergmann
2010-10-06 17:14       ` Krishna Kumar2
2010-10-06 17:50         ` Arnd Bergmann

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