From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philip Romanov Subject: SKY2 vs SK98LIN performance on 88E8053 MAC Date: Fri, 8 Jun 2007 13:41:55 -0700 (PDT) Message-ID: <884143.12109.qm@web52311.mail.re2.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT To: netdev@vger.kernel.org Return-path: Received: from web52311.mail.re2.yahoo.com ([206.190.48.154]:49143 "HELO web52311.mail.re2.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S966068AbXFHUsf (ORCPT ); Fri, 8 Jun 2007 16:48:35 -0400 Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hello! We are observing severe IPv4 forwarding degradation when switching from sk98lin to sky2 driver. Setup: plain 2.6.21.3 kernel, 88E8053 Marvell Yukon2 MAC, sk98lin is @revision 8.41.2.3 coming from FC6, SKY2 driver from 2.6.21.3 kernel, both drivers are in NAPI mode. Benchmarks are done using bidirectional traffic generated by IXIA, sending 256-byte packets. Observed packet throughput is almost 30% higher with sklin98 driver. Ethernet flow control is turned off in SKY2 driver (hard-coded as off, we know about this problem). I also have oprofile records of the drivers in case anybody is interested. Please share info if you know anything on SKY2 performance bottlenecks. Thanks in advance, Philip R. ____________________________________________________________________________________ Shape Yahoo! in your own image. Join our Network Research Panel today! http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7