[OpenMP] Add memory allocation using hwloc #132843
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This patch adds support for memory allocation using hwloc. To enable memory allocation using hwloc, env KMP_TOPOLOGY_METHOD=hwloc needs to be used. If hwloc is not supported/available, allocation will fallback to default path.
jpeyton52
reviewed
Apr 1, 2025
jpeyton52
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Apr 1, 2025
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Sorry about this, it appears that the memory attributes were added in HWLOC 2.3, but there was some mishap with the hwloc_location enum (there is a reference to HWLOC_LOCATION_TYPE_CPUSET in the __kmp_hwloc_alloc_membind() function. To get it working with all the 2.x versions of HWLOC, I had to add this little bit right under the #includes at the top of the file:
+#if KMP_USE_HWLOC
+#if HWLOC_API_VERSION > 0x00020300
+#define KMP_HWLOC_LOCATION_TYPE_CPUSET HWLOC_LOCATION_TYPE_CPUSET
+#elif HWLOC_API_VERSION == 0x00020300
+#define KMP_HWLOC_LOCATION_TYPE_CPUSET hwloc_location::HWLOC_LOCATION_TYPE_CPUSET
+#else
+enum hwloc_memattr_id_e {
+ HWLOC_MEMATTR_ID_BANDWIDTH,
+ HWLOC_MEMATTR_ID_CAPACITY
+};
+#endif
+#endif
Then we can change the HWLOC_API_VERSION to 0x00020400 to 0x00020300
jpeyton52
reviewed
Apr 1, 2025
searlmc1
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to ROCm/llvm-project
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Apr 2, 2025
This reverts commit 730e8a4.
searlmc1
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to ROCm/llvm-project
that referenced
this pull request
Apr 3, 2025
This patch adds support for memory allocation using hwloc. To enable memory allocation using hwloc, env KMP_TOPOLOGY_METHOD=hwloc needs to be used. If hwloc is not supported/available, allocation will fallback to default path.
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This patch adds support for memory allocation using hwloc. To enable memory allocation using hwloc, env KMP_TOPOLOGY_METHOD=hwloc needs to be used. If hwloc is not supported/available, allocation will fallback to default path.