[SCore-users] Score limitations?
Amik St-Cyr CFD Lab
amik at cfdlab.mcgill.ca
Wed Sep 18 22:46:02 JST 2002
Hi again,
LOOP BACK TEST:
---------------
It seems that it works on ly if I try something
like:
./rpminit cn1 myrinet2k
and then
./rpmtest cn1 myrinet2k -dest $node -ping
where node goes from 1 to 128
If INSTEAD I use:
./rpminit cn2 myrinet2k
./rpmtest cn2 myrinet2k -dest $node -ping
then time communication times out for each node.
Is this behaviour normal?
Other tests:
------------
For the other test everithing goes fine below 64 nodes
and crashes if I try to use more. COuld this strange behavior
arise when the routing tables/files for the myrinet2k switch
are wrong ?
Amik St-Cyr
On Tue, 2002-09-17 at 20:53, kameyama at pccluster.org wrote:
> In article <1032301235.1944.81.camel at stan.cfdlab.mcgill.ca> Amik St-Cyr CFD Lab <amik at cfdlab.mcgill.ca> wrotes:
> > (not yet fully functional) Beowulf.
> > We have a 128 nodes(dual) cluster connected with both a myrinet2k
> > switch and an ethernet 100MB network.
> > The only problem (yet) is that when I try a very simple
> > program the scrun/mpirun hangs forever when the number of
> > nodes used is greater then 64.
> ...
> > Do you folks think that:
> >
> > 1)the problem is myrinet2k related ?
>
> Please check Total test by scstest.
> Please look at
> http://www.pccluster.org/score/dist/score/html/en/installation/pm-testmyrinet.html
>
> > 2)the driver for the myrinet switch has a problem ?
> > we are using:
> > /* PM/Myrinet */
> > myrinet2k type=myrinet2k \
> > -firmware:file=/opt/score/share/lanai/lanaiM2k.mcp \
> > -config:file=/opt/score/etc/pm-myrinet.conf
>
> scoreboard setting seems to good.
> Please check pm-myrinet.conf.
>
> If you want to check of node 65,
> you can use pmini and pmtest.
> Please look at PM/Myrinet test page:
> http://www.pccluster.org/score/dist/score/html/en/installation/pm-testmyrinet.html
>
> from Kameyama Toyohisa
--
_____________________________________________________
Dr. A. St-Cyr
Research Associate, CFD Lab
Department of Mechanical Engineering
McGill University
688 Sherbrooke Street West, 7th floor
Montreal, Qc, Canada H3A 2S6
Tel: +1 (514) 398-1710, Admin. Fax : 2203
amik at cfdlab.mcgill.ca
_____________________________________________________
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