commit 9a0d0f00e90c4f9e0cbd281ab5578db28fafdfcb
author Paul Osmialowski <pawel.osmialowski@arm.com> Thu May 16 13:16:24 2019 +0000
committer Paul Osmialowski <pawel.osmialowski@arm.com> Thu May 16 13:16:24 2019 +0000
tree 4ff648af7974c22d23bcbe88361cbbb3a2e6abbd
parent a86b5e4738990f8eeaff4ad1ee05b1af42bc34ea

Fix hwloc topology traversal code unable to handle situation where L2 cache is common for the packages

Currently cores within package that share the same L2 cache are grouped together.
The current logic behind this assumes that the L2 cache is always at deeper
(or the same) level than the package itself. In case when L2 cache is common
for all packages (and the packages are at deeper level than L2 cache) the whole of
the further topology discovery fails to find any computational units resulting in
following assertion:

Assertion failure at kmp_affinity.cpp(715): nActiveThreads == __kmp_avail_proc.
OMP: Error #13: Assertion failure at kmp_affinity.cpp(715).

This patch adds a bit of a logic that prevents such situation from occurring.

Differential Revision: https://reviews.llvm.org/D61796



git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@360890 91177308-0d34-0410-b5e6-96231b3b80d8