[Myrinet] NAS benchmarks on GM.

Hi, 

We have a 8 node linux 2.4 cluster (All P-II nodes, 128MB ram) connected 
through a 8 port myrinet switch. We are using Lanai-7 cards with 4 MB memory.
We are tyrin to run NAS benchmarks 2.3 using mpich-1.2.1..7b over GM 1.5.2 . 

The NAS benchmarks execute correctly for 8 nodes, if they are compiled for
the class W but if we increase the workload of the benchmark to class A and
higher, the benchmarks cease to work.

This happens when we run multiple (4, in our case) programs together. 
in short: We had 4 MG (class A)  programs running simultaneously, asking for 
all 8 nodes.

Note that if we run upto 2 MG (A) applications, it works fine. Problem starts
when we scale it up over 3 or more..

We are not sure what could be causing this. Is it possible that we get 
limited by the amount of memory on the LANAI card or could it be host 
memory limitation ? (128 MB !)    We are also not sure how can we find 
out what is the usage statistics of the lanai memory at any instant of
time...  

We will greatly appreciate your help on this.

Thanks a lot,
Regards,
--Saurabh


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SAURABH AGARWAL            202 Vairo Blvd.               (R) 814-861-8771
Graduate Student           Apt# 232                      [email protected]
C.S.E Department	   State College
Penn State University      PA - 16803     http://www.cse.psu.edu/~sagarwal
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