Charm++ parallel programming system

[Jeff Hammond <jhammond AT alcf.anl.gov>]

if compilation times are empirically bad, give me the data and i will
throw more tirades regarding the unacceptable nature of a leadership
computing facility with a login-node bottleneck.  if it was not
grounds for termination, i would have yanked those PPC970 BGP logins
out of the racks and burned them in the parking lot a long time ago.
it's incredibly frustrating that some of my colleagues sabotaged my
attempts to get better logins by arguing the bottleneck was the
filesystem, which is provably false by comparison to JSC, at least for
the codes i care about.

jeff

On Tue, May 15, 2012 at 12:48 AM, Jim Phillips 
<jim AT ks.uiuc.edu>
 wrote:
>
> The front of of BG/Q is a Power 7 so compilation times are reasonable.
>
> -Jim
>
>
>
> On Mon, 14 May 2012, Phil Miller wrote:
>
>> On Mon, May 14, 2012 at 8:02 PM, Edgar Solomonik
>> <solomon AT eecs.berkeley.edu>
>>  wrote:
>>>
>>> Is there a build of Charm++ on Cetus (BG/Q at ALCF)?  Looks like
>>> mpi-bluegeneq does a g++ build, but I also see a xlc config file in
>>> arch.  Is there a faster xlc build I can use?
>>
>>
>> The pami-bluegeneq build should be somewhat better :-). In either
>> case, the xlc modifier on the build will switch you from g++ to xlC++
>> - better code, but much slower compilation.
>>
>>> Also this little problem in the Charm++ version of git that I pulled
>>> an hour ago.
>>>
>>> TopoManager.C:302
>>>
>>> CmiAssert( a>=0 && x<dimNA && b>=0 && b<dimNB && c>=0 && c<dimNC &&
>>> d>=0 && d<dimND && e>=0 && e<dimNE && t>=0 && t<dimNT );
>>>
>>> should be
>>>
>>> CmiAssert( a>=0 && a<dimNA && b>=0 && b<dimNB && c>=0 && c<dimNC &&
>>> d>=0 && d<dimND && e>=0 && e<dimNE && t>=0 && t<dimNT );
>>
>>
>> You should still have commit privileges - go ahead and fix it.
>>
>> Phil
>>
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>>
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-- 
Jeff Hammond
Argonne Leadership Computing Facility
University of Chicago Computation Institute
jhammond AT alcf.anl.gov
 / (630) 252-5381
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