[ofa-general] RE: [ewg] Running netperf and iperf over SDP

[Jim Mott]

Hi,
  I have seen large variances between runs since I started SDP work.   I have not seen more than 25% (or so) difference with netperf
runs, but even that is unacceptable.  The change from 3200 to 1200 is big enough that I expect something else is going on.  Is it
possible that the second run did not use SDP?  I always export LD_PRELOAD (or unset LD_PRELOAD) prior to running the tests.

  With the publication of the zero copy bcopy changes, bugs and performance issues have moved to the top of my list.  I would love
to get any specific performance test parameters that seem to reliably cause especially egregious results like these.

Jim Mott

-----Original Message-----
From: ewg-bounces at lists.openfabrics.org [mailto:ewg-bounces at lists.openfabrics.org] On Behalf Of Moshe Kazir
Sent: Sunday, October 28, 2007 10:11 AM
To: ewg at lists.openfabrics.org; general at lists.openfabrics.org
Cc: Moni Levy; Alon Verner
Subject: [ewg] Running netperf and iperf over SDP


While running netperf and iperf over SDP I get unstable Performance
results.

On iperf I get more then 25 % difference between minimum and maximum.

On netperf I get the following amazing result. ->

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 # while   LD_PRELOAD=/usr/lib64/libsdp.so ./netperf  -H 192.168.7.172
-- -m 512 -M 1047 ; do echo . ; done
TCP STREAM TEST to 192.168.7.172
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

126976 126976    512    10.00    3247.39
.
TCP STREAM TEST to 192.168.7.172
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

126976 126976    512    10.00    1222.48
.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Can some one spar me a hint ?
What I'm doing wrong ?

The test run on x86_64 , sles 10 sp1 , OFED-1.2.5  

Moshe
____________________________________________________________
Moshe Katzir   |  +972-9971-8639 (o)   |   +972-52-860-6042  (m)
 
Voltaire - The Grid Backbone
 
 www.voltaire.com

  
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