From mboxrd@z Thu Jan 1 00:00:00 1970 From: Felix Radensky Subject: Re: Ethernet bridge performance Date: Thu, 07 Aug 2003 19:05:31 +0300 Sender: netdev-bounce@oss.sgi.com Message-ID: <3F3278CB.5070505@allot.com> References: <3F3217E7.2080903@allot.com> <20030807085930.032b0602.shemminger@osdl.org> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="Boundary_(ID_5fAUGaz5oHMtphX6UtIryg)" Cc: netdev@oss.sgi.com Return-path: To: Stephen Hemminger Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org --Boundary_(ID_5fAUGaz5oHMtphX6UtIryg) Content-type: text/plain; charset=us-ascii; format=flowed Content-transfer-encoding: 7BIT It's 2.4.22-pre8. I have to work with 2.4, 2.6 is not an option at this point. Felix. Stephen Hemminger wrote: >What kernel version? 2.6 should be faster. > >On Thu, 07 Aug 2003 12:12:07 +0300 >Felix Radensky wrote: > > > >>Hi, >> >>I'm evaluating a performance of a dual port ethernet bridge, and the >>results are a bit disappointing. I would appreciate any hints on improving >>the results. >> >>I'm using a Dual Xeon 2.66 GHz box based on Intel 5701 chipset with 1G >>of RAM. NICs are e1000 82546 connected to PCIX bus. Kernel is 2.4.22-pre8, >>e1000 driver version 5.1.13-k1 with NAPI support. NICs' interrupts are >>bound >>to CPU0. >> >>The test consists of sending 200 byte UDP packets from 2 ports of Gigabit >>IXIA traffic generator to 2 bridge ports. The bridge is capable to sustain >>the rate of ~170000 pps from each IXIA port without drops. I was >>expecting it to be able to do at least 250000 pps (our own bridge code >> based >>on 2.2.x kernel sustains ~266000 pps on the same hardware). >>e1000 driver drops 0 packets, all drops occur at higher level. >> >>The output of oprofile attached. I'd be happy to provide any info you may >>need. >> >>Thanks in advance for your help. >> >>Felix. >> >> >> > > > --Boundary_(ID_5fAUGaz5oHMtphX6UtIryg) Content-type: text/html; charset=us-ascii Content-transfer-encoding: 7BIT It's 2.4.22-pre8. I have to work with 2.4, 2.6 is not an option
at this point.

Felix.

Stephen Hemminger wrote:
What kernel version?  2.6 should be faster.

On Thu, 07 Aug 2003 12:12:07 +0300
Felix Radensky <felix@allot.com> wrote:

  
Hi,

I'm evaluating a performance of a dual port ethernet bridge, and the
results are a bit disappointing. I would appreciate any hints on improving
the results.

I'm using a Dual Xeon 2.66 GHz box based on Intel  5701 chipset with  1G
of RAM. NICs are e1000 82546 connected to PCIX bus. Kernel is 2.4.22-pre8,
e1000  driver version 5.1.13-k1 with NAPI support. NICs' interrupts are 
bound
to CPU0.

The test consists of sending 200 byte UDP packets from 2 ports of Gigabit
IXIA traffic generator to 2 bridge ports. The bridge is capable to sustain
the rate of ~170000 pps from each IXIA port without drops. I was
expecting it to be able to do at least 250000 pps (our own bridge code 
 based
on 2.2.x kernel sustains ~266000 pps on the same hardware).
e1000 driver drops 0 packets, all drops occur at higher level.

The output of oprofile attached. I'd be happy to provide any info you may
need.

Thanks in advance for your help.

Felix.

--Boundary_(ID_5fAUGaz5oHMtphX6UtIryg)--