Quoting Mark Hahn <[EMAIL PROTECTED]>:
>> The OpenMP parallelization should also work without Linda - but of course
>> limited to some routines and 2 cores.
I wonder if this is only true if you, for instance, compile gaussian
with a PGI demo license or something. also, the normal (old) way of
using SMP is fork-based parallelism with SYSV shm. is this separate
(orthogonal) to OpenMP-based parallelism? I suspect the latter is only
used for SMP parallelism within parallelized blas libraries like MKL.
I compiled G03.C02 without OpenMP and tried to use it still with
%nprocs but it
was not working, as it was before in G03.B05. So I contacted Gaussian and they
stated, that the old fork-model is gone since C.02 (or maybe even since C.01).
The SMP is now only OpenMP according to this info I have.
machines with single dual-core CPUs. Let's rephrase: ...but limited to the
cores in each of the machines.
mosix, I believe, provides network-shared SYSV shm. I wonder if anyone has
You mean like e.g. http://www.kerrighed.org , indeed, would be interesting.
-- Reuti
tried to use gaussian that way. depending on the sharing patters, it might
work pretty well - my understanding is that the shm is used mainly for
caching intermediate values (integrals?), which might be
write-once-read-mostly, and therefore friendly to the kind of caching
necessary for any page-based net-shm implementation.
regards, mark hahn.
_______________________________________________
Beowulf mailing list, [email protected]
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
