SUMMARY: ES40 Hardware or Software?

[jim caldwell <caldwell@xxxxxxxxxxxxxxxxxxxxxxxxx>]

It turns out that my problem machine had "dropped" 2 cpus 
in the inverval since I last power cycled it.  It HAD crashed
a couple of times but restarted by itself apparently OK.

I power cycled it and all 4 cpus came up.  Why it dropped 
the 2 cpus is still a mystery but now that I know that this can
happen I'll actually check the /var/adm/messages file after any
machine crashes and reboots.

Thanks to Paul A Sand, he suggested using 

/usr/sbin/pset_info

to probe what the system was actually using for cpu's.  Only 2 showed
but all other 8 machines showed 4.

thanks,
jim


On Wed, 31 Jul 2002, jim caldwell wrote:

> 
> Hi Managers,
> 
> I have 9 ES40's running Tru64 5.1, all 4 processor machines,
> each with 1GB or more of memory.
> 
> The problem is that when I run a small 4 processor MPI (fortran)
> job on any one of 8 of the machines all is fine: "top" shows 4 processes
> running at 99.9% cpu active each cpu.
> 
> HOWEVER, on the 9th machine, the identical job runs 4 processes at
> 49.9% cpu active each cpu.  I can take the job and set the number of
> processors down to 2 and I get 2 processes running at 99.9% cpu active
> each.
> 
> I'm completely baffled.
> 
> thanks,
> jim
> 
> ----------------------------------------------------------------------------
> James W. Caldwell                         (voice) 415-476-8603
> Department of Pharmaceutical Chemistry    (fax)   415-502-1411  
> Mail Stop 0446                            (email) caldwell@heimdal.ucsf.edu
> 513 Parnassus Avenue                      
> University of California                  
> San Francisco, CA 94143-0446               
> ----------------------------------------------------------------------------
> 
> 


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James W. Caldwell                         (voice) 415-476-8603
Department of Pharmaceutical Chemistry    (fax)   415-502-1411  
Mail Stop 0446                            (email) caldwell@heimdal.ucsf.edu
513 Parnassus Avenue                      
University of California                  
San Francisco, CA 94143-0446               
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