Push version 1.2.8 to trunk.
Optimized math on ARM platforms.
Fixed two crash bugs in the handling of getters and setters.
Improved the debugger support by adding scope chain information.
Improved the profiler support by compressing log data transmitted to clients.
Improved overall performance.
git-svn-id: http://v8.googlecode.com/svn/trunk@2181 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/heap.cc b/src/heap.cc
index 772cf32..eb70f21 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -79,9 +79,15 @@
// semispace_size_ should be a power of 2 and old_generation_size_ should be
// a multiple of Page::kPageSize.
-int Heap::semispace_size_ = 2*MB;
+#if V8_HOST_ARCH_ARM
+int Heap::semispace_size_ = 512*KB;
+int Heap::old_generation_size_ = 128*MB;
+int Heap::initial_semispace_size_ = 128*KB;
+#else
+int Heap::semispace_size_ = 8*MB;
int Heap::old_generation_size_ = 512*MB;
-int Heap::initial_semispace_size_ = 256*KB;
+int Heap::initial_semispace_size_ = 512*KB;
+#endif
GCCallback Heap::global_gc_prologue_callback_ = NULL;
GCCallback Heap::global_gc_epilogue_callback_ = NULL;
@@ -90,9 +96,8 @@
// ConfigureHeap.
int Heap::young_generation_size_ = 0; // Will be 2 * semispace_size_.
-// Double the new space after this many scavenge collections.
-int Heap::new_space_growth_limit_ = 8;
-int Heap::scavenge_count_ = 0;
+int Heap::survived_since_last_expansion_ = 0;
+
Heap::HeapState Heap::gc_state_ = NOT_IN_GC;
int Heap::mc_count_ = 0;
@@ -421,7 +426,7 @@
old_gen_promotion_limit_ =
old_gen_size + Max(kMinimumPromotionLimit, old_gen_size / 3);
old_gen_allocation_limit_ =
- old_gen_size + Max(kMinimumAllocationLimit, old_gen_size / 3);
+ old_gen_size + Max(kMinimumAllocationLimit, old_gen_size / 2);
old_gen_exhausted_ = false;
// If we have used the mark-compact collector to collect the new
@@ -624,16 +629,17 @@
// Implements Cheney's copying algorithm
LOG(ResourceEvent("scavenge", "begin"));
- scavenge_count_++;
+ // Used for updating survived_since_last_expansion_ at function end.
+ int survived_watermark = PromotedSpaceSize();
+
if (new_space_.Capacity() < new_space_.MaximumCapacity() &&
- scavenge_count_ > new_space_growth_limit_) {
- // Double the size of the new space, and double the limit. The next
- // doubling attempt will occur after the current new_space_growth_limit_
- // more collections.
+ survived_since_last_expansion_ > new_space_.Capacity()) {
+ // Double the size of new space if there is room to grow and enough
+ // data has survived scavenge since the last expansion.
// TODO(1240712): NewSpace::Double has a return value which is
// ignored here.
new_space_.Double();
- new_space_growth_limit_ *= 2;
+ survived_since_last_expansion_ = 0;
}
// Flip the semispaces. After flipping, to space is empty, from space has
@@ -737,6 +743,10 @@
// Set age mark.
new_space_.set_age_mark(new_space_.top());
+ // Update how much has survived scavenge.
+ survived_since_last_expansion_ +=
+ (PromotedSpaceSize() - survived_watermark) + new_space_.Size();
+
LOG(ResourceEvent("scavenge", "end"));
gc_state_ = NOT_IN_GC;
@@ -1766,7 +1776,6 @@
// through the self_reference parameter.
code->CopyFrom(desc);
if (sinfo != NULL) sinfo->Serialize(code); // write scope info
- LOG(CodeAllocateEvent(code, desc.origin));
#ifdef DEBUG
code->Verify();