From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [Bugme-new] [Bug 11752] New: Extremely low netperf UDP_RR throughput for nvidia MCP65 Date: Thu, 16 Oct 2008 13:49:20 -0700 Message-ID: <20081016134920.1492cdcc.akpm@linux-foundation.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: bugme-daemon@bugzilla.kernel.org, arno@heho.snv.jussieu.fr, Ayaz Abdulla To: netdev@vger.kernel.org Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:36348 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754579AbYJPUuO (ORCPT ); Thu, 16 Oct 2008 16:50:14 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: (switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Mon, 13 Oct 2008 13:41:19 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=11752 > > Summary: Extremely low netperf UDP_RR throughput for nvidia MCP65 > Product: Drivers > Version: 2.5 > KernelVersion: from F10-Beta-x86_64-Live-KDE.iso > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Network > AssignedTo: jgarzik@pobox.com > ReportedBy: arno@heho.snv.jussieu.fr > > > Latest working kernel version: - > Earliest failing kernel version: > Distribution: F10-Beta-x86_64 > Hardware Environment: HP Pavillon dv6820ef > Software Environment: > Problem Description: when running at 1Gbps netperf shows good performance for > TCP_STREAM and UDP_STREAM tests, but extremely bad performance for UDP_RR test > (less then 1 ping-pong a second whereas at 100Mbps performance easily reaches > 10-20K a second) > > A friend figured out that it looks like small packets at 1Gbps are dropped > as being falsely considered crc-errored. > > > > Steps to reproduce: Which driver is this using? forcedeth?