Fwd: [computational.science] CFP: Workshop on Large-Scale Parallel Processing (LSPP'10)

[Matthew Knepley]

  Forschungszentrum Juelich, Germany
Stathis Papaefstathiou  Microsoft
Michael SchergerTexas AM University-Corpus Christi
Harvey WassermanNERSC/LBNL
Gerhard Wellein University of Erlangen, Germany
Pat Worley  Oak Ridge National Laboratory

Workshop Webpage: http://www.ccs3.lanl.gov/LSPP


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-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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-malign-double

[Barry Smith]

Good point, I have removed it.

I put it in because I wanted an easy way to test that PETSc double  
arrays are always 8 byte aligned (and the unaligned struct values were  
giving me lots of false alarms).

I guess we can test for double align on x86_64 systems.

Barry

The IBM BlueGene doesn't like 4 byte aligned doubles and sends a bus  
error after a certain number are generated, Thus I was motivated to  
make PETSc a bit clearer on that.


On Nov 12, 2009, at 9:29 AM, Lisandro Dalcin wrote:

 On Wed, Nov 11, 2009 at 11:02 PM, Barry Smith bsmith at mcs.anl.gov  
 wrote:

  Satish,

gcc supports the option  -malign-double on some systems. Please  
 add it to
 the flags that configure checks for c and c++ and have it added if it
 exists.


 Definitely -1. Why are you asking for this? On x86_64 this is the
 default. In i386, this flag is likely going to break ABI's.


 -- 
 Lisandro Dalc?n
 ---
 Centro Internacional de M?todos Computacionales en Ingenier?a (CIMEC)
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