From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: TCP-Protection is really a pain... Date: Thu, 03 Feb 2005 17:13:26 -0500 Message-ID: <4202A206.7060100@pobox.com> References: <4201A382.1020208@rapidforum.com> <20050202205437.571a702b@localhost.localdomain> <4201B4EA.2030101@rapidforum.com> <20050203113335.46396c11@dxpl.pdx.osdl.net> <42028278.7040008@rapidforum.com> <20050203121503.4f122779@dxpl.pdx.osdl.net> <42028747.6060602@rapidforum.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Stephen Hemminger , netdev@oss.sgi.com To: Christian Schmid In-Reply-To: <42028747.6060602@rapidforum.com> Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Christian Schmid wrote: > What exactly is tcp segmentation offload? Where can I read more about > it? Should I disable it or is this not a good idea? It's an optimization designed to reduce CPU usage for zero-copy apps (those that use sendfile(2)). It would be a useful datapoint to disable TSO, and see if that improves things for you. Jeff