From mboxrd@z Thu Jan 1 00:00:00 1970 From: lm@bitmover.com (Larry McVoy) Subject: Re: tcp bw in 2.6 Date: Tue, 2 Oct 2007 12:33:04 -0700 Message-ID: <20071002193304.GA31611@bitmover.com> References: <20071002005917.GB5480@bitmover.com> <20071002150935.GC17418@bitmover.com> <47028DEF.5070009@psc.edu> <20071002190742.GC29944@bitmover.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: Larry McVoy , John Heffner , Herbert Xu , torvalds@linux-foundation.org, davem@davemloft.net, wscott@bitmover.com, netd Return-path: Received: from ipcop.bitmover.com ([192.132.92.15]:43769 "EHLO mail.bitmover.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753574AbXJBTdJ (ORCPT ); Tue, 2 Oct 2007 15:33:09 -0400 Content-Disposition: inline In-Reply-To: <20071002190742.GC29944@bitmover.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org More data, we've conclusively eliminated the card / cpu from the mix. We've got 2 ia64 boxes with e1000 interfaces. One box is running linux 2.6.12 and the other is running hpux 11. I made sure the linux one was running at gigabit and reran the tests from the linux/ia64 <=> hp/ia64. Same results, when linux sends it is slow, when it receives it is fast. And note carefully: we've removed hpux from the equation, we can do the same tests from linux to multiple linux clients and see the same thing, sending from the server is slow, receiving on the server is fast. -- --- Larry McVoy lm at bitmover.com http://www.bitkeeper.com