Revision: 14395
Author: [email protected]
Date: Tue Apr 23 08:21:11 2013
Log: Add a flag to deoptimize all functions every n garbage
collections.
[email protected]
Review URL: https://chromiumcodereview.appspot.com/14091013
http://code.google.com/p/v8/source/detail?r=14395
Modified:
/branches/bleeding_edge/src/flag-definitions.h
/branches/bleeding_edge/src/heap.cc
/branches/bleeding_edge/src/heap.h
=======================================
--- /branches/bleeding_edge/src/flag-definitions.h Tue Apr 16 07:39:48 2013
+++ /branches/bleeding_edge/src/flag-definitions.h Tue Apr 23 08:21:11 2013
@@ -230,6 +230,9 @@
DEFINE_int(deopt_every_n_times,
0,
"deoptimize every n times a deopt point is passed")
+DEFINE_int(deopt_every_n_garbage_collections,
+ 0,
+ "deoptimize every n garbage collections")
DEFINE_bool(trap_on_deopt, false, "put a break point before deoptimizing")
DEFINE_bool(deoptimize_uncommon_cases, true, "deoptimize uncommon cases")
DEFINE_bool(polymorphic_inlining, true, "polymorphic inlining")
=======================================
--- /branches/bleeding_edge/src/heap.cc Fri Apr 19 06:26:47 2013
+++ /branches/bleeding_edge/src/heap.cc Tue Apr 23 08:21:11 2013
@@ -157,6 +157,7 @@
ms_count_at_last_idle_notification_(0),
gc_count_at_last_idle_gc_(0),
scavenges_since_last_idle_round_(kIdleScavengeThreshold),
+ gcs_since_last_deopt_(0),
#ifdef VERIFY_HEAP
no_weak_embedded_maps_verification_scope_depth_(0),
#endif
@@ -487,6 +488,12 @@
if (FLAG_gc_verbose) Print();
if (FLAG_code_stats) ReportCodeStatistics("After GC");
#endif
+ if (FLAG_deopt_every_n_garbage_collections > 0) {
+ if (++gcs_since_last_deopt_ == FLAG_deopt_every_n_garbage_collections)
{
+ Deoptimizer::DeoptimizeAll(isolate());
+ gcs_since_last_deopt_ = 0;
+ }
+ }
isolate_->counters()->alive_after_last_gc()->Set(
static_cast<int>(SizeOfObjects()));
=======================================
--- /branches/bleeding_edge/src/heap.h Fri Apr 19 06:26:47 2013
+++ /branches/bleeding_edge/src/heap.h Tue Apr 23 08:21:11 2013
@@ -2295,6 +2295,11 @@
unsigned int gc_count_at_last_idle_gc_;
int scavenges_since_last_idle_round_;
+ // If the --deopt_every_n_garbage_collections flag is set to a positive
value,
+ // this variable holds the number of garbage collections since the last
+ // deoptimization triggered by garbage collection.
+ int gcs_since_last_deopt_;
+
#ifdef VERIFY_HEAP
int no_weak_embedded_maps_verification_scope_depth_;
#endif
--
--
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