Bug#651041: OpenPA atomic primitives

Pavan Balaji balaji at mcs.anl.gov
Mon Dec 26 08:57:50 UTC 2011

There are three possible solutions for this:

1. You can disable OPA's processor atomics using 
--with-atomic-primitives=no as the configure error message states.  In 
this case, OPA will use locks to emulate atomic operations, which is 
slower but works correctly.

2. You can change the device to ch3:sock (using the configure option 
--with-device=ch3:sock), which doesn't use shared memory at all and 
hence doesn't need OPA atomics.

3. You can contribute m68k processor atomics to OPA, so it is natively 
supported and OPA doesn't have to fall back to locks.

  -- Pavan

Pavan Balaji

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