From: "David S. Miller" <davem@davemloft.net>
To: John Heffner <jheffner@psc.edu>
Cc: ak@muc.de, shemminger@osdl.org, baruch@ev-en.org, netdev@oss.sgi.com
Subject: Re: [RFC] TCP congestion schedulers
Date: Mon, 21 Mar 2005 13:51:54 -0800 [thread overview]
Message-ID: <20050321135154.0bbeae85.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0503211605300.6729@dexter.psc.edu>
On Mon, 21 Mar 2005 16:25:56 -0500 (EST)
John Heffner <jheffner@psc.edu> wrote:
> Would you really expect a single extra indirect call per ack to have a
> significant performance impact? This is surprising to me. Where does the
> cost come from? Replacing instruction cache lines?
Maybe not for ACK processing (that's very thick already) but
perhaps for a lighter fast path definitely so.
next prev parent reply other threads:[~2005-03-21 21:51 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-23 21:30 [PATCH] select congestion control with one sysctl Baruch Even
2005-02-23 21:57 ` David S. Miller
2005-02-24 0:23 ` Stephen Hemminger
2005-02-24 0:33 ` David S. Miller
2005-02-26 9:41 ` Arnaldo Carvalho de Melo
[not found] ` <421D30FA.1060900@ev-en.org>
[not found] ` <20050225120814.5fa77b13@dxpl.pdx.osdl.net>
[not found] ` <20050309210442.3e9786a6.davem@davemloft.net>
[not found] ` <4230288F.1030202@ev-en.org>
[not found] ` <20050310182629.1eab09ec.davem@davemloft.net>
[not found] ` <20050311120054.4bbf675a@dxpl.pdx.osdl.net>
[not found] ` <20050311201011.360c00da.davem@davemloft.net>
2005-03-14 23:17 ` [RFC] TCP congestion schedulers Stephen Hemminger
2005-03-15 19:54 ` John Heffner
2005-03-15 22:16 ` John Heffner
2005-03-18 4:12 ` David S. Miller
2005-03-18 12:53 ` Arnaldo Carvalho de Melo
2005-03-18 13:43 ` jamal
2005-03-18 16:13 ` Arnaldo Carvalho de Melo
2005-03-18 16:45 ` Stephen Hemminger
2005-03-18 16:59 ` Arnaldo Carvalho de Melo
2005-03-19 20:19 ` Andi Kleen
2005-03-21 21:25 ` John Heffner
2005-03-21 21:51 ` David S. Miller [this message]
2005-03-21 22:30 ` Baruch Even
2005-03-22 0:10 ` Rick Jones
2005-03-22 1:41 ` Olaf Kirch
2005-03-22 7:41 ` Andi Kleen
2005-03-28 23:51 ` Stephen Hemminger
2005-03-29 15:25 ` Andi Kleen
2005-03-29 17:17 ` Stephen Hemminger
2005-03-29 18:58 ` Rick Jones
2005-03-30 9:41 ` Matt Mackall
2005-03-29 19:32 ` John Heffner
2005-03-29 20:03 ` David S. Miller
2005-03-29 20:09 ` Rick Jones
2005-04-08 19:33 ` John Heffner
2005-04-08 20:20 ` Rick Jones
2005-02-24 1:05 ` [PATCH] select congestion control with one sysctl Daniele Lacamera
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