From owner-freebsd-net Fri Oct 8 14:29:59 1999 Delivered-To: freebsd-net@freebsd.org Received: from khavrinen.lcs.mit.edu (khavrinen.lcs.mit.edu [18.24.4.193]) by hub.freebsd.org (Postfix) with ESMTP id 32D6814F9B for ; Fri, 8 Oct 1999 14:29:56 -0700 (PDT) (envelope-from wollman@khavrinen.lcs.mit.edu) Received: (from wollman@localhost) by khavrinen.lcs.mit.edu (8.9.3/8.9.3) id RAA67391; Fri, 8 Oct 1999 17:29:54 -0400 (EDT) (envelope-from wollman) Date: Fri, 8 Oct 1999 17:29:54 -0400 (EDT) From: Garrett Wollman Message-Id: <199910082129.RAA67391@khavrinen.lcs.mit.edu> To: Mohit Aron Cc: freebsd-net@FreeBSD.ORG Subject: sbappend() is not scalable In-Reply-To: <199910082051.PAA25028@cs.rice.edu> References: <199910082051.PAA25028@cs.rice.edu> Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org < said: > can be about 600 mbufs in the socket buffer waiting to be acknowledged. Thus > upon every ACK, about 600 mbufs are traversed causing the TCP sender to run > out of CPU. This is a well-known feature of the 4BSD socket layer. The right fix is to get rid of the socket layer, but this requires a substantial effort that none of the people who know how to do it have been able to put in. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message