From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabien Salvi Subject: Re: [IP over FC] qla2xipsrc perf (qla2x00ip driver) Date: Wed, 16 Oct 2002 19:20:06 +0200 Sender: linux-net-owner@vger.kernel.org Message-ID: <3DAD9FC6.BA4A4E78@cri74.org> References: <233C89823A37714D95B1A891DE3BCE521423D7@xch-b.win.zambeel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: To: Dheeraj Pandey Cc: Linux SCSI list , Linux Net list List-Id: linux-scsi@vger.kernel.org Dheeraj Pandey wrote: > > ... > > * with IP over FC : > > I have around 21 MB/s performance using a big file (600 MB) > > transfer by > > FTP > > > > * with IP on Gigabit Ethernet : > > I have around 33 MB/s with the same test using similar > > conditions (same > > file, same directory to store it). > > Let us identify the bottleneck first. Is it the CPU0? Try observing "mpstat > -P ALL" and see which one of the CPU's is loaded, if at all. > > Its important we identify what resource saturates in the IP-over-FC case, > which doesn't in the other. Yes, you're right. I should have give more informations about CPU utilization... There is not really a CPU bottleneck I think. I didn't use mpstat tool for that, but just top (thanks for your information, I must admin I didn't know the mpstat tool...). So, here are the results with IP over FC : 19:11:39 CPU %user %nice %system %idle intr/s 19:11:40 all 0.00 0.00 12.50 87.50 8033.00 19:11:40 0 0.00 0.00 4.00 96.00 8033.00 19:11:40 1 0.00 0.00 21.00 79.00 8033.00 And with Gigabit ethernet : 19:14:49 CPU %user %nice %system %idle intr/s 19:14:50 all 0.00 0.00 26.00 74.00 14432.00 19:14:50 0 0.00 0.00 40.00 60.00 14432.00 19:14:50 1 0.00 0.00 12.00 88.00 14432.00 Thanks in advance for your help ! -- Fabien SALVI Centre de Ressources Informatiques Archamps, France -- http://www.cri74.org PingOO GNU/linux distribution : http://www.pingoo.org