Index: third_party/tcmalloc/chromium/src/common.h |
diff --git a/third_party/tcmalloc/chromium/src/common.h b/third_party/tcmalloc/chromium/src/common.h |
index 78cdc036ceb27bf3538d6c3411810f9a27757ce9..4f848fa2f01013cf53931cf42b354c460d6585d5 100644 |
--- a/third_party/tcmalloc/chromium/src/common.h |
+++ b/third_party/tcmalloc/chromium/src/common.h |
@@ -31,6 +31,7 @@ |
// Author: Sanjay Ghemawat <opensource@google.com> |
// |
// Common definitions for tcmalloc code. |
+ |
#ifndef TCMALLOC_COMMON_H_ |
#define TCMALLOC_COMMON_H_ |
@@ -63,7 +64,8 @@ typedef uintptr_t Length; |
static const size_t kAlignment = 8; |
-// Constants dependant on tcmalloc configuration and archetecture. |
+// Constants dependant on tcmalloc configuration and archetecture. Chromium |
+// tunes these constants. |
// We need to guarantee the smallest class size is big enough to hold the |
// pointers that form the free list. |
static const size_t kNumFreeListPointers = |
@@ -75,16 +77,16 @@ static const size_t kSkippedClasses = (kAlignment < kMinClassSize ? 1 : 0); |
#if defined(TCMALLOC_LARGE_PAGES) |
static const size_t kPageShift = 15; |
-static const size_t kNumClasses = 95 - kSkippedClasses; |
-static const size_t kMaxThreadCacheSize = 4 << 20; |
+static const size_t kNumClasses = 78 - kSkippedClasses; |
#else |
-static const size_t kPageShift = 12; |
-static const size_t kNumClasses = 61 - kSkippedClasses; |
-static const size_t kMaxThreadCacheSize = 2 << 20; |
+static const size_t kPageShift = 13; |
+static const size_t kNumClasses = 86 - kSkippedClasses; |
#endif |
+static const size_t kMaxThreadCacheSize = 4 << 20; |
static const size_t kPageSize = 1 << kPageShift; |
-static const size_t kMaxSize = 8u * kPageSize; |
+// TODO(dmikurube): We Chromium may want to tune this kMaxSize. |
+static const size_t kMaxSize = 256 * 1024; |
// For all span-lengths < kMaxPages we keep an exact-size list. |
static const size_t kMaxPages = 1 << (20 - kPageShift); |
@@ -176,7 +178,7 @@ class SizeMap { |
// 32768 (32768 + 127 + (120<<7)) / 128 376 |
static const int kMaxSmallSize = 1024; |
static const size_t kClassArraySize = |
- (((1 << kPageShift) * 8u + 127 + (120 << 7)) >> 7) + 1; |
+ ((kMaxSize + 127 + (120 << 7)) >> 7) + 1; |
unsigned char class_array_[kClassArraySize]; |
// Compute index of the class_array[] entry for a given size |
@@ -232,9 +234,6 @@ class SizeMap { |
inline int num_objects_to_move(size_t cl) { |
return num_objects_to_move_[cl]; |
} |
- |
- // Dump contents of the computed size map |
- void Dump(TCMalloc_Printer* out); |
}; |
// Allocates "bytes" worth of memory and returns it. Increments |