Re: [Myricom help #30221] Performance of Myrinet over TCP/IP

Hi, Craig,

On Tue, 2004-09-07 at 12:36, Craig Tierney wrote:
> Has anyone tested sustainable bandwidth over using
> IP emulations lately?  I remember in the past getting
> measurements that were close to peak (> 200 MB/s) for
> B cards.  However, I just tested mpptest over ch_p4 but
> used the myrinet IP interface and I am only getting
> 60 MB/s.  Is right?  The MTU is set to 9000 and I have
> tried several different nodes.
> 
> I am using Fedora Core 1 with Linux-2.4.26.  The gm version
> is 1.6.5.

For which size message did you see 60 MB/s?

What's the value of the environment variable P4_SOCKBUFSIZE?

Which architecture is this?

And if you run netperf command, what level of performance do you see?
  http://www.myri.com/cgi-bin/fom?file=84

Susan
-- 

------------------------------------------
Susan Blackford
Member of Technical Staff
Myricom Inc.
------------------------------------------