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Add information about time spent in external callback to

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traces produces with --trace-gc.
Review URL: http://codereview.chromium.org/661170

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3960 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
kasperl@chromium.org 2010-02-26 08:27:20 +00:00
parent d2061c07c8
commit 57f47e704f
2 changed files with 28 additions and 5 deletions
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13
src/heap.cc
View File

@ -558,6 +558,7 @@ void Heap::PerformGarbageCollection(AllocationSpace space,
VerifySymbolTable();
if (collector == MARK_COMPACTOR && global_gc_prologue_callback_) {
ASSERT(!allocation_allowed_);
GCTracer::ExternalScope scope(tracer);
global_gc_prologue_callback_();
}
EnsureFromSpaceIsCommitted();
@ -591,6 +592,7 @@ void Heap::PerformGarbageCollection(AllocationSpace space,
if (collector == MARK_COMPACTOR && global_gc_epilogue_callback_) {
ASSERT(!allocation_allowed_);
GCTracer::ExternalScope scope(tracer);
global_gc_epilogue_callback_();
}
VerifySymbolTable();
@ -4067,6 +4069,7 @@ void Heap::TracePathToGlobal() {
GCTracer::GCTracer()
: start_time_(0.0),
start_size_(0.0),
external_time_(0.0),
gc_count_(0),
full_gc_count_(0),
is_compacting_(false),
@ -4084,10 +4087,12 @@ GCTracer::GCTracer()
GCTracer::~GCTracer() {
if (!FLAG_trace_gc) return;
// Printf ONE line iff flag is set.
PrintF("%s %.1f -> %.1f MB, %d ms.\n",
CollectorString(),
start_size_, SizeOfHeapObjects(),
static_cast<int>(OS::TimeCurrentMillis() - start_time_));
int time = static_cast<int>(OS::TimeCurrentMillis() - start_time_);
int external_time = static_cast<int>(external_time_);
PrintF("%s %.1f -> %.1f MB, ",
CollectorString(), start_size_, SizeOfHeapObjects());
if (external_time > 0) PrintF("%d / ", external_time);
PrintF("%d ms.\n", time);
#if defined(ENABLE_LOGGING_AND_PROFILING)
Heap::PrintShortHeapStatistics();

20
src/heap.h
View File

@ -1520,8 +1520,23 @@ class DisableAssertNoAllocation {
class GCTracer BASE_EMBEDDED {
public:
GCTracer();
// Time spent while in the external scope counts towards the
// external time in the tracer and will be reported separately.
class ExternalScope BASE_EMBEDDED {
public:
explicit ExternalScope(GCTracer* tracer) : tracer_(tracer) {
start_time_ = OS::TimeCurrentMillis();
}
~ExternalScope() {
tracer_->external_time_ += OS::TimeCurrentMillis() - start_time_;
}
private:
GCTracer* tracer_;
double start_time_;
};
GCTracer();
~GCTracer();
// Sets the collector.
@ -1555,6 +1570,9 @@ class GCTracer BASE_EMBEDDED {
double start_size_; // Size of objects in heap set in constructor.
GarbageCollector collector_; // Type of collector.
// Keep track of the amount of time spent in external callbacks.
double external_time_;
// A count (including this one, eg, the first collection is 1) of the
// number of garbage collections.
int gc_count_;