Samuel Thibault wrote:
Terry Dontje, le Fri 20 Aug 2010 06:42:11 -0400, a écrit :
  
Samuel Thibault wrote:
    
I eventually added using lgrp_affinity_set(). Not as a replacement for
processor_bind, as AIUI, lgrp_affinity_set() doesn't permit to specify
precise processors.
      
I believe (and I might be wrong here) that there are premade lgrps that 
correspond to precise processors.
    

This is unfortunately not the case on the box we have at INRIA:

lgrp 0 has 0 children

while there are two cores on the machine.

  
That may be due to the version of Solaris you have installed.  I am not sure if any of the S10 updates have these premade lgroups.  Can you tell me what S10 update you are running.

  
This is what led me to believe that using lgrp_affinity_set() might
help in being able to bind to multiple processors.
    

If there was assurance that there is a lgrp for them, yes, but
apparently it's not always true.

  
Unfortunately I don't have the exact particulars to give you.  If I get 
some time in the next couple weeks I'll see if I can come up with some 
example code that might be able to do the above.
    

Actually, what would more helpful would be access to some big solaris
machine, as we (INRIA) currently don't even have access to a NUMA
solaris machine.

  
I have access to some of these types of machines internally.  I believe all of the larger ones are SPARC based.  Unfortunately, there is no way I can get you access to them since they are development machines behind our firewall and our policy does not allow for such.

Is there a set of tests you would like me to run for you?

--
Oracle
Terry D. Dontje | Principal Software Engineer
Developer Tools Engineering | +1.781.442.2631
Oracle - Performance Technologies
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Email terry.dontje@oracle.com