From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Yan, Zheng" <yanzheng@21cn.com>
Cc: netdev <netdev@vger.kernel.org>
Subject: Re: [RFC] tcp: use order-3 pages in tcp_sendmsg()
Date: Thu, 15 Nov 2012 05:47:26 -0800 [thread overview]
Message-ID: <1352987246.4497.36.camel@edumazet-glaptop> (raw)
In-Reply-To: <CAAM7YAm+XJKTxJStLMoo4RRV85oogN5wCHfXorkEiUHKqNKHDQ@mail.gmail.com>
On Thu, 2012-11-15 at 15:52 +0800, Yan, Zheng wrote:
> LLC misses happen on the receiver size. It means most pages allocated by the
> senders are cache hot. But when using order-3 pages, 2048 * 32k = 64M, 64M
> is much larger than LLC size.
By the way, this 2048*32k is wrong, as the receiver only uses fragments
in pages, and its not related to the "tcp: use order-3 pages in
tcp_sendmsg()" commit
Many drivers use order-0 pages to hold ethernet frames, regardless of
what was used by the sender ;)
next prev parent reply other threads:[~2012-11-15 13:47 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
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 [this message]
2012-11-21 8:05 ` Yan, Zheng
2012-11-15 18:33 ` Rick Jones
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