From mboxrd@z Thu Jan 1 00:00:00 1970 Reply-To: From: "Allen Curtis" To: "Jean-Denis Boyer" Cc: Subject: RE: Debugging Network Performance Date: Wed, 5 Jun 2002 06:35:57 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" In-Reply-To: Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: > With my 200MHz 8260 based board, using kernel 2.4.19-pre7, > I fetch a large file (~50Mb) with ftp, and send it to /dev/null > get large_file /dev/null > and I obtain the following performance: > 50216878 bytes received in 5.52 seconds (9090508 bytes/s) I will check smaller files. I know that there is a nice burst of activity when the transfer starts. Can you try 100MB+ transfer and see if you still get the same performance. Perhaps I should try 2.4.19pre7. If I get better results it sure helps to narrow the search for likely suspects. I will also try piping to /dev/null. > If the performance drops in 100Mbps full duplex, the problem might be > one of configuration between your BCM switch and the external switch. > Are both ends of the link (between your BCM switch and external switch) > set to auto-negotiation? The switch is a LinkSys 5 port 10/100 switch. (no configuration options that I am aware of) All ports on the BCM should be in auto-negotiate mode. In a previous version I printed the negotiation status of each port and it showed 100, full-duplex. Thanks for the pointers. Based on the emails that I have received, I am not the only one with this problem. Hopefully we can reproduce your results and provide some feedback to the group. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/