[mpich-discuss] Very long configuration time

[Nikoloutsakos Nikolaos]

Hi,

any success with excecutable on xeon phi?
please provide ./configure arguments
im very interested to use mpich on xeon phi thank you.

Στις 2014-05-21 23:35, Yida Wang έγραψε:
> I have to use icc since I want to run code on Intel Xeon Phi. Also, I
> tried to install MPICH2 since it claims to support Intel-MIC
> architecture and is open source.
> 
> BTW, still configuring. It's faster to do it locally (both the source
> code and the Intel compiler), but encountered a Fortran type length
> detection error (don't remember the exact error information now, it
> recommended me to "Consider setting CROSS_F77_SIZEOF_INTEGER to the
> length in bytes of a Fortran INTEGER") last run.
> 
> Thanks,
> YW
> 
> On Wed, May 21, 2014 at 4:28 PM, Jed Brown <jed at jedbrown.org> wrote:
> 
>> Kenneth Raffenetti <raffenet at mcs.anl.gov> writes:
>> 
>>> The Intel compilers could also be a source of slowdown. Are they
>>> installed on a network filesystem? They may also call out to a
>> network
>>> license server each time they are invoked for a compile test.
>> Does just
>>> compiling a small program take a long time with icc, ifort, etc.?
>> 
>> The system headers and libraries are also often on a network file
>> system.  Although moving the source tree to a local disk usually
>> provides some improvement, I rarely find it getting anywhere close
>> to
>> the performance of a cheap laptop because most of the file accesses
>> performed by the compiler are hitting the network anyway.  This is
>> the
>> price we all pay for legacy file system semantics and dumb compiler
>> architecture.  I think most companies in a place to change these
>> things
>> do full local installs on their development boxes so that
>> compilation is
>> fast.  And the HPC vendors wear blindfolds and put their heads in
>> the
>> sand.
>> 
>> As for Intel license servers, this is the price you pay for
>> anti-piracy
>> measures.  People that are really ticked off by this crack their
>> compilers---the pirates enjoy a better user experience.  Is it
>> ethical
>> to use a cracked version if you've already paid for the licensed
>> version?
>> 
>> Besides those issues, the Intel compiler usually takes a lot longer
>> to
>> compile.  It's worth building with gcc and clang to compare.  You
>> might
>> be pleasantly surprised to find that in addition to compiling
>> faster,
>> your code also runs faster (this is the case for several
>> applications I
>> work with).
>> 
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