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| author | Jonas Hahnfeld <hahnjo@hahnjo.de> | 2017-12-08 15:07:05 +0000 |
|---|---|---|
| committer | Jonas Hahnfeld <hahnjo@hahnjo.de> | 2017-12-08 15:07:05 +0000 |
| commit | a0542f78656841154035d5d8a2d6ed73c6801d6c (patch) | |
| tree | 11b235ba7ad40c117264a7222113ec4f395db5a4 /runtime/src/kmp_affinity.cpp | |
| parent | c549ebcc764d60c3f187cbd10a7cb6112f841315 (diff) | |
Fix thread affinity on non-x86 Linux
To make thread affinity work according to the OpenMP spec, the
runtime needs information about the hardware topology. On Linux
the default way is to parse /proc/cpuinfo which contains this
information for x86 machines but (at least) not for AArch64 and
Power architectures.
Fortunately, there is a different code path which is able to get
that data from sysfs. The needed patch has landed in 2006 for
Linux 2.6.16 which is safe to assume nowadays (even RHEL 5 had
a kernel version derived from 2.6.18, and we are now at RHEL 7!).
Differential Revision: https://reviews.llvm.org/D40357
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@320151 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'runtime/src/kmp_affinity.cpp')
| -rw-r--r-- | runtime/src/kmp_affinity.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/runtime/src/kmp_affinity.cpp b/runtime/src/kmp_affinity.cpp index c281397..d7a0eda 100644 --- a/runtime/src/kmp_affinity.cpp +++ b/runtime/src/kmp_affinity.cpp @@ -2030,7 +2030,7 @@ static int __kmp_affinity_create_cpuinfo_map(AddrUnsPair **address2os, if (threadInfo[num_avail][osIdIndex] != UINT_MAX) goto dup_field; threadInfo[num_avail][osIdIndex] = val; -#if KMP_OS_LINUX && USE_SYSFS_INFO +#if KMP_OS_LINUX && !(KMP_ARCH_X86 || KMP_ARCH_X86_64) char path[256]; KMP_SNPRINTF( path, sizeof(path), |