[PATCH] D31989: Avoid calling SizeClassMap::MaxCachedHint on hot path, it's not free.

Aleksey Shlyapnikov via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Apr 12 14:04:31 PDT 2017


This revision was automatically updated to reflect the committed changes.
Closed by commit rL300103: Avoid calling SizeClassMap::MaxCachedHint on hot path, it's not free. (authored by alekseyshl).

Changed prior to commit:
  https://reviews.llvm.org/D31989?vs=95014&id=95029#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D31989

Files:
  compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_local_cache.h


Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_local_cache.h
===================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_local_cache.h
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_local_cache.h
@@ -102,7 +102,7 @@
   NOINLINE void Refill(PerClass *c, SizeClassAllocator *allocator,
                        uptr class_id) {
     InitCache();
-    uptr num_requested_chunks = SizeClassMap::MaxCachedHint(class_id);
+    uptr num_requested_chunks = c->max_count / 2;
     allocator->GetFromAllocator(&stats_, class_id, c->chunks,
                                 num_requested_chunks);
     c->count = num_requested_chunks;


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