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Brice Goglin d6e415cd41 hwloc: AIX: Fix PU os_index
When looking for PUs inside R_MAXSDL rads, some AIX 6.1 releases
return one first rad without any PU.
AIX 6.1 00F63F144C00 does (on quad-power7).
AIX 6.1 00CBAAC24C00 doesn't (on 16x power6).

So we can't assume rad #x contains PU #x. But we already have the right
code to fill the cpuset from the rad, so use that to obtain the PU os_index
as well.

Cannot be used to obtain NUMA node os_index since there's no way to directly
retrieve NUMA nodes from rads (mempools seem unrelated). Just keep using #rad
for NUMA nodes os_index and document that convention when converting back in
set_membind().

Thanks to Hendryk Bockelmann and Erik Schnetter for helping debugging.

(cherry picked from commit open-mpi/hwloc@60006c7b88)
Signed-off-by: Jeff Squyres <jsquyres@cisco.com>
2015-03-27 05:14:33 -07:00
..
2015-03-27 05:14:33 -07:00
2014-01-07 15:58:40 +00:00

12 Sep 2011

Notes for hwloc component maintainers:

1. There can only be *1* hwloc version component at a time.
   Specifically: if there are multiple hwlocXYZ components (i.e.,
   different versions of hwloc), then they must all be .ompi_ignore'd
   except for 1.  This is because we currently m4_include all of the
   underlying hwloc's .m4 files -- if there are multiple hwlocXYZ
   components, I don't know if m4 will barf at the multiple,
   conflicting AC_DEFUNs, or whether it'll just do something
   completely undefined.

1a. As a consequence, if you're adding a new hwloc version component,
   you'll need to .ompi_ignore all others while you're testing the new
   one. 

2. If someone wants to fix #1 someday, we might be able to do what we
   do for libevent: OPAL_CONFIG_SUBDIR (instead of slurping in hwloc's
   .m4 files).