On Oct 8, 2010, at 2:21 PM, Jeff Squyres wrote:
> No. Open MPI does not have MPD -- I think you're thinking of a different MPI
> implementation. :-)
Someone pointed out to me off-list that I wasn't quite clear here...
*If* all of your architectures are the same endian and otherwise equivalent
On Oct 7, 2010, at 3:53 PM, Durga Choudhury wrote:
> If I compile with --enable-heterogenous flag for different
> *architectures* (I have a mix of old 32 bit x86, newer x86_64 and some
> Cell BE based boxes (PS3)), would I be able to form a MPD ring between
> all these different machines?
No. Op
On Oct 7, 2010, at 3:44 PM, David Ronis wrote:
> I have various boxes that run openmpi and I can't seem to use all of
> them at once because they have different CPU's (e.g., pentiums, athlons
> (both 32 bit) vs Intel I7 (64 bit)).
You could also just compile everything 32 bit, and then not use
David Ronis wrote:
Ralph, thanks for the reply.
If I build with enable-heterogeneous and then decide to run on a
homogeneous set of nodes, does the additional "overhead" go away or
become completely negligible; i.e., if no conversion is necessary.
I'm no expert, but I think the overhead d
Ralph, thanks for the reply.
If I build with enable-heterogeneous and then decide to run on a
homogeneous set of nodes, does the additional "overhead" go away or
become completely negligible; i.e., if no conversion is necessary.
David
On Thu, 2010-10-07 at 15:17 -0600, Ralph Castain wrote:
>
I have various boxes that run openmpi and I can't seem to use all of
them at once because they have different CPU's (e.g., pentiums, athlons
(both 32 bit) vs Intel I7 (64 bit)). I'm about the build 1.4.3 and was
wondering if I should add --enable-heterogenous to the configure flags.
Any advice as
The short answer is "yes". It should work.
On Thu, Oct 7, 2010 at 1:53 PM, Durga Choudhury wrote:
> I'd like to add to this question the following:
>
> If I compile with --enable-heterogenous flag for different
> *architectures* (I have a mix of old 32 bit x86, newer x86_64 and some
> Cell BE b
Hetero operations tend to lose a little performance due to the need to
convert data, but otherwise there is no real negative. We don't do it by
default solely because the majority of installations don't need to, and
there is no reason to lose even a little performance if it isn't necessary.
If you
I'd like to add to this question the following:
If I compile with --enable-heterogenous flag for different
*architectures* (I have a mix of old 32 bit x86, newer x86_64 and some
Cell BE based boxes (PS3)), would I be able to form a MPD ring between
all these different machines?
Best regards
Durga
I have various boxes that run openmpi and I can't seem to use all of
them at once because they have different CPU's (e.g., pentiums, athlons
(both 32 bit) vs Intel I7 (64 bit)). I'm about the build 1.4.3 and was
wondering if I should add --enable-heterogenous to the configure flags.
Any advice as
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