[Beowulf] Roadrunner shutdown
diep at xs4all.nl
Thu Apr 4 19:18:27 PDT 2013
Note that as for nuke explosions i have no idea how those look like -
maybe someone more knowledgeable wants to comment on that.
As a total layman there i would suspect that it's important where the
protons/neutrons/whatever-tons/supertiny-tons are located. I'd be
modelling that naively using
So that would mean the only low level library you need is a
matrixcalculation and some relative simple functions - with the
eating 99% of all system time on that massive supercomputer out of
all calculations done on it.
In such case one would need surprisingly little very well optimized
code to make optimal usage out of such massive supercomputer.
Any other 'secret' batchjob i'd be running on a different
supercomputer. If there is no need to run a massive vector oriented
workload type matrixcalculation -
one just shouldn't run on such type of supercomputer i feel. NASA
still had that 10240 socket supercomputer back then if i remember well,
to give one example...
On Apr 4, 2013, at 5:39 PM, Max R. Dechantsreiter wrote:
>> It doesn't matter whether you code for blue gene, cuda or phi - from
>> a software viewpoint it's all vector type coding you've got to do.
>> the price of 1 coder is total peanuts compared to
>> the price of those supercomputers. So specialistic written software
>> is what you need anyway.
> Simply porting an application shouldn't take much effort,
> as long as vendor-specific libraries aren't involved.
> However, special and sometimes intensive efforts are often
> required to achieve good performance (high utilization).
> The unfortunate fact is that funds are more easily spent
> on hardware than on the human resources needed to utilize
> them effectively.
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