From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: Route cache performance under stress Date: Tue, 10 Jun 2003 08:56:00 -0700 (PDT) Sender: netdev-bounce@oss.sgi.com Message-ID: <20030610.085600.71109220.davem@redhat.com> References: <20030609195652.E35696@shell.cyberus.ca> <20030610015311.GB23009@netnation.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: ralph+d@istop.com, hadi@shell.cyberus.ca, xerox@foonet.net, fw@deneb.enyo.de, netdev@oss.sgi.com, linux-net@vger.kernel.org Return-path: To: sim@netnation.com In-Reply-To: <20030610015311.GB23009@netnation.com> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org From: Simon Kirby Date: Mon, 9 Jun 2003 18:53:12 -0700 Your CPU use is quite a bit higher than ours. Yeah, but his faster cpu is all being burnt to a crisp doing PIO accesses to the 3c59x card. I found that once NAPI was happening, userspace seemed to get a fairly decent amount of time. Unfortunately, NAPI won't help him with the current way the 3c59x driver works. It needs to provide a way to use MEM I/O before NAPI would start to be of use to him.