On Feb 3, 2006, at 1:32 PM, David Creasy wrote:
> Thanks for an amazingly useful library.
I'm glad you find it useful! :-)
I apologize for the delay in replying; I just returned off about 2
weeks of travel and a bazillion e-mails piled up while I was gone. :-(
> The documentation says that the return value from
> plpa_sched_getaffinity
> is zero for success. Looks as though this is incorrect, and the return
> value is as in the sched_getaffinity man page:
>
> "the size (in bytes) of the affinity mask used by the kernel. On
> error,
> -1 is returned, and errno is set appropriately"
>
> Can I just assume any value > 0 is OK?
Yoinks -- this is not something we were careful about. It looks like
upon success, we're returning the value of the syscall. Hence, the
return value is dependent upon whatever variant of setaffinity() is
implemented in the back-end kernel.
Paul/Bogdan -- in your research, did all the set/getaffinity kernel
implementations return the same kind of value upon success (e.g.,
what is listed above)? Or do we need to frob the return value
returned by syscall to return some kind of consistent value?
--
{+} Jeff Squyres
{+} The Open MPI Project
{+} http://www.open-mpi.org/
|
![[Flag]](../../../../../community/mirrors/flag-us.gif){kind=small}