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Subject: Re: [hwloc-devel] More memory binding questions
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2011-01-06 01:56:59


Jeff Squyres, le Thu 06 Jan 2011 03:39:28 +0100, a écrit :
> * \note HWLOC_MEMBIND_STRICT is only supported with this function on
> * some systems. If it is specified on an unsupported system, -1 is
> * returned and errno is set to ENOSYS.

Err, not exactly: there is currently no system where hwloc_get_membind
is supported without STRICT but not supported with STRICT.

> * If HWLOC_MEMBIND_STRICT is not specified, or if all the process'
> * (or thread's) pages have the same memory binding policy,

policy _and nodeset_ (i.e. actually just one node).

> \p nodeset
> * is cleared. Each page is then examined and has the bit set in \p
> * nodeset corresponding to the NUMA node where it is located. The
> * resulting \p nodeset represents the set of NUMA nodes containing
> * all the pages in the process (or thread).

Samudl