Victor,
Just on a hunch, look in your BIOS to see if Hyperthreading is turned
on. If so, turn it off. We have seen some unusual behavior on some of
our machines unless this is disabled.
I am interested in your progress as I have just begun working with
OpenMPI as well. I have used mpich for quite some time, but felt
compelled to get some experience with OpenMPI as well. I just installed
it this weekend on an AMD dual-core machine with 2 gigs of ram. Maybe I
will try and replicate your experiment if you can direct me to what
program you are benchmarking.
Jeff F. Pummill
Senior Linux Cluster Administrator
University of Arkansas
Fayetteville, Arkansas 72701
(479) 575 - 4590
http://hpc.uark.edu
victor marian wrote:
The problem is that my executable file runs on the
Pentium D in 80 seconds on two cores and in 25 seconds
on one core.
And on another Sun SMP machine with 20 processors it
runs perfectly (the problem is perfectly scallable).
Victor Marian
Laboratory of Machine Elements and Tribology
University Politehnica of Bucharest
Romania
--- Brock Palen <bro...@umich.edu> wrote:
It means that your OMPI was compiled to support
uDAPL (a type of
infinibad network) but that your computer does not
have such a card
installed. Because you dont it will fall back to
ethernet. But
because you are just running on a single machine.
You will use the
fastest form of communication using shared memory.
so you can ignore
that message. Unless in the future you add a uDAPL
powered network
and you still get that message then you need to
worry.
Brock Palen
Center for Advanced Computing
bro...@umich.edu
(734)936-1985
On Jun 10, 2007, at 9:18 AM, victor marian wrote:
Hello,
I have a Pentium D computer with Solaris 10
installed.
I installed OpenMPI, succesfully compiled my
Fortran
program, but when giving
mpirun -np 2 progexe
I receive
[0,1,0]: uDAPL on host SERVSOLARIS was unable to
find
any NICs.
Another transport will be used instead, although
this
may result in
lower performance.
I am a begginer in MPI and don't know what it
means.
What
should I do to solve the problem?
Thank you.
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