[PATCH] D66038: [Support] heavyweight_hardware_concurrency uses affinity when counting cores fails, and never returns 0

[Sam McCall via Phabricator via cfe-commits]

sammccall updated this revision to Diff 214474.
sammccall added a comment.

Rebase


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D66038/new/

https://reviews.llvm.org/D66038

Files:
  llvm/include/llvm/Support/Threading.h
  llvm/lib/Support/Threading.cpp


Index: llvm/lib/Support/Threading.cpp
===================================================================
--- llvm/lib/Support/Threading.cpp
+++ llvm/lib/Support/Threading.cpp
@@ -68,7 +68,7 @@
   // ADL.
   int NumPhysical = sys::getHostNumPhysicalCores();
   if (NumPhysical == -1)
-    return std::thread::hardware_concurrency();
+    return llvm::hardware_concurrency();
   return NumPhysical;
 }
 
Index: llvm/include/llvm/Support/Threading.h
===================================================================
--- llvm/include/llvm/Support/Threading.h
+++ llvm/include/llvm/Support/Threading.h
@@ -130,7 +130,7 @@
   /// Get the amount of currency to use for tasks requiring significant
   /// memory or other resources. Currently based on physical cores, if
   /// available for the host system, otherwise falls back to
-  /// thread::hardware_concurrency().
+  /// llvm::hardware_concurrency().
   /// Returns 1 when LLVM is configured with LLVM_ENABLE_THREADS=OFF
   unsigned heavyweight_hardware_concurrency();
 


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