[llvm-commits] [compiler-rt] r172215 - /compiler-rt/trunk/lib/sanitizer_common/sanitizer_quarantine.h

[Dmitry Vyukov]

Author: dvyukov
Date: Fri Jan 11 10:40:01 2013
New Revision: 172215

URL: http://llvm.org/viewvc/llvm-project?rev=172215&view=rev
Log:
asan: add memory prefetch to quarantine recycle

Modified:
    compiler-rt/trunk/lib/sanitizer_common/sanitizer_quarantine.h

Modified: compiler-rt/trunk/lib/sanitizer_common/sanitizer_quarantine.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_quarantine.h?rev=172215&r1=172214&r2=172215&view=diff
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_quarantine.h (original)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_quarantine.h Fri Jan 11 10:40:01 2013
@@ -89,9 +89,18 @@
       }
     }
     recycle_mutex_.Unlock();
-    while (QuarantineBatch *b = tmp.DequeueBatch()) {
-      for (uptr i = 0; i < b->count; i++)
+    DoRecycle(&tmp, cb);
+  }
+
+  void NOINLINE DoRecycle(Cache *c, Callback cb) {
+    while (QuarantineBatch *b = c->DequeueBatch()) {
+      const uptr kPrefetch = 16;
+      for (uptr i = 0; i < kPrefetch; i++)
+        PREFETCH(b->batch[i]);
+      for (uptr i = 0; i < b->count; i++) {
+        PREFETCH(b->batch[i + kPrefetch]);
         cb.Recycle((Node*)b->batch[i]);
+      }
       cb.Deallocate(b);
     }
   }