From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nivedita Singhvi Subject: Re: bad TSO performance in 2.6.9-rc2-BK Date: Wed, 29 Sep 2004 14:10:24 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <415B24C0.2020208@us.ibm.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Andi Kleen , "David S. Miller" , herbert@gondor.apana.org.au, andy.grover@gmail.com, anton@samba.org, netdev@oss.sgi.com Return-path: To: John Heffner In-Reply-To: Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org John Heffner wrote: > On Wed, 29 Sep 2004, Andi Kleen wrote: > > >>I tried to re-test it but I didn't get very far because the kernel >>with your patch crashes regularly during netperf. No serial console, >>but the backtrace is {tcp_ack+877} {tcp_rcv_established+350} ... >>Before that there are a few "retrans out leaked" messages. > > > I just tried to re-create this situation, and I got the same problem. > Latest bk tree with dave's 5 patches, gcc 3.3.4, uni-processor p4/e1000 to > a slow-ish p3/sk98lin (dual-cpu but with maxcpus=1). I just crashed too, no backtrace. netperf tcp stream test, and was on bk14 + dave's 5 patches, p4/e1000 -> Intel Pentium M proc (1.7GHz). Going to repeat on slower SMPs with serial console, get more info.. thanks, Nivedita