[SCore-users-jp] Re: [SCore-users] Communication Performance with Score, with and without network trunking

[Shinji Sumimoto]

Dear Viet

# Cc: to score-user ML for sharing information.

From: "Viet" <viet ＠ sowa.is.uec.ac.jp>
Subject: RE: [SCore-users] Communication Performance with Score, with and without network trunking
Date: Thu, 13 Jul 2006 18:22:45 +0900
Message-ID: <000001c6a65d$e6335150$ca4315ac ＠ spc0608>

viet> Dear Shinji Sumimoto Sensei,
viet> 
viet> Thank you very much for your quick reply.
viet> 
viet> >Could you show the results of communication performance RTT 
viet> >and bandwidth using rpmtest?
viet> Rpmtest -reply and rpmtest -ping result:
viet> 	8		0.00102167 sec

That's too bad. It should be 20-30 usec.

viet> Rpmtest -sink and rpmtest -burst result:
viet> 	8		100660

Could you try "rpmtest -burst" with -len 1400 (if you are using JUMBO
Frame -len 8800)? These results show maximum bandwidth performance.

viet> >PS: How do you defined the e1000 device driver parameters on
viet> >    /etc/modprobe.conf?  The default parameters of the e1000 device
viet> >    driver is really bad for PM/Ethernet.
viet> I did not change the modprobe.conf file. Its content is as follows:
viet> 	alias 	eth0	e1000
viet> 	alias	eth1	e1000

Could you try adding following options to modprobe.conf and reload
e1000 device driver or reboot the nodes?

============================================
options e1000 TxIntDelay=0,0 TxAbsIntDelay=0,0  RxIntDelay=0,0 RxAbsIntDelay=0,0 InterruptThrottleRate=0,0 TxDescriptors=512,512 RxDescriptors=512,512
============================================

Shinji.

viet> Thank you for your kind support.
viet> 
viet> Viet
viet> 
viet> 
viet> 
viet> >Hi.
viet> >
viet> >Could you show the results of communication performance RTT 
viet> >and bandwidth using rpmtest?
viet> >
viet> >http://www.pccluster.org/score/dist/score/html/en/installation/
viet> >pm-testethernet.html
viet> >
viet> >RTT can be measured by combinations of "rpmtest -reply" and 
viet> >"rpmtest -ping". Bandwidth can be measured by combinations of 
viet> >"rpmtest -sink" and "rpmtest -burst".
viet> >
viet> >PS: How do you defined the e1000 device driver parameters on
viet> >    /etc/modprobe.conf?  The default parameters of the e1000 device
viet> >    driver is really bad for PM/Ethernet.
viet> >
viet> >Thank you for using SCore and network trunking.
viet> >
viet> >Shinji.
viet> >
viet> 
viet> 
------
Shinji Sumimoto, Fujitsu Labs
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