From: Alexander Duyck <alexander.h.duyck@intel.com>
To: David Miller <davem@davemloft.net>
Cc: eric.dumazet@gmail.com, netdev@vger.kernel.org
Subject: Re: [RFC] tcp: use order-3 pages in tcp_sendmsg()
Date: Wed, 19 Sep 2012 12:04:36 -0700 [thread overview]
Message-ID: <505A1744.50209@intel.com> (raw)
In-Reply-To: <20120919.135655.381209248813843140.davem@davemloft.net>
On 09/19/2012 10:56 AM, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@gmail.com>
> Date: Wed, 19 Sep 2012 17:14:19 +0200
>
>> I did some tests and got no problem so far, even using splice() [ this
>> one was tricky because it only deals with order-0 pages at this moment ]
>>
>> NIC tested : ixgbe, igb, bnx2x, tg3, mellanox mlx4
>>
>> On loopback, performance of netperf goes from 31900 Mb/s to 38500 Mb/s,
>> thats a 20 % increase.
> That's really a lot more than I expected, nice.
When I get some time I will test this patch on a system with an iommu
enabled. I suspect it will have a huge performance impact there since
now you would be looking at roughly 1/8th the total number of map/unmap
calls on a system with 4K pages.
Thanks,
Alex
next prev parent reply other threads:[~2012-09-19 19:04 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-17 7:49 [RFC] tcp: use order-3 pages in tcp_sendmsg() Eric Dumazet
2012-09-17 16:12 ` David Miller
2012-09-17 17:02 ` Eric Dumazet
2012-09-17 17:04 ` Eric Dumazet
2012-09-17 17:07 ` David Miller
2012-09-19 15:14 ` Eric Dumazet
2012-09-19 17:28 ` Rick Jones
2012-09-19 17:55 ` Eric Dumazet
2012-09-19 17:56 ` David Miller
2012-09-19 19:04 ` Alexander Duyck [this message]
2012-09-19 20:18 ` Ben Hutchings
2012-09-19 22:20 ` Vijay Subramanian
2012-09-20 5:37 ` Eric Dumazet
2012-09-20 17:10 ` Rick Jones
2012-09-20 17:43 ` Eric Dumazet
2012-09-20 18:37 ` Yuchung Cheng
2012-09-20 19:40 ` David Miller
2012-09-20 20:06 ` Rick Jones
2012-09-20 20:25 ` Eric Dumazet
2012-09-21 15:48 ` Eric Dumazet
2012-09-21 16:27 ` David Miller
2012-09-21 16:51 ` Eric Dumazet
2012-09-21 17:04 ` David Miller
2012-09-21 17:11 ` Eric Dumazet
2012-09-23 12:47 ` Jan Engelhardt
2012-09-23 16:16 ` David Miller
2012-09-23 17:40 ` Jan Engelhardt
2012-09-23 18:13 ` Eric Dumazet
2012-09-23 18:27 ` David Miller
2012-09-20 21:39 ` Vijay Subramanian
2012-09-20 22:01 ` Rick Jones
2012-11-15 7:52 ` Yan, Zheng
2012-11-15 13:06 ` Eric Dumazet
2012-11-16 2:36 ` Yan, Zheng
2012-11-15 13:47 ` Eric Dumazet
2012-11-21 8:05 ` Yan, Zheng
2012-11-15 18:33 ` Rick Jones
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