symmetric shared pointers

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From: Jason Beech-Brandt (jason_at_ahpcrc_dot_org)
Date: Fri Apr 28 2006 - 12:17:45 PDT

  • Next message: Jason Duell: "Re: symmetric shared pointers" 
    Hi,

Does anybody have experience using the "symmetric" shared pointer 
representation in Berkeley upc?  I've built a version of upc-2.2.2 for 
an SGI Altix with the --enable-sptr-symmetric configure option and then 
built an application code (shmem network) which contains a large number 
of shared pointers with indefinite blocksize.  The results I'm getting 
when using the symmetric/packed representation are consistently slower 
than just using the packed representation.  The problem gets worse the 
larger the number of threads I use.

Does anybody have any tips for the recommended use of the symmetric 
representation?  I understand they are still experimental, I just want 
to make sure I'm not using them in an unintended fashion...

Thanks for the info.

Jason
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