Tune the GC ergnomics for the read barrier config.
Add 1.0 to the heap growth multiplier for the read barrier config, which
reduces the GC frequency down to roughly the same as CMS in one of the
jank tests.
Bug: 29517059
Bug: 12687968
Test: ART run-tests.
Change-Id: I1302a2f17e862f152d2f92bc06a65c9e6defcba0
diff --git a/runtime/gc/heap.cc b/runtime/gc/heap.cc
index 8da1493..a6d62a9 100644
--- a/runtime/gc/heap.cc
+++ b/runtime/gc/heap.cc
@@ -121,6 +121,10 @@
static constexpr size_t kNativeAllocationHistogramBuckets = 16;
+// Extra added to the heap growth multiplier. Used to adjust the GC ergonomics for the read barrier
+// config.
+static constexpr double kExtraHeapGrowthMultiplier = kUseReadBarrier ? 1.0 : 0.0;
+
static inline bool CareAboutPauseTimes() {
return Runtime::Current()->InJankPerceptibleProcessState();
}
@@ -220,7 +224,8 @@
min_free_(min_free),
max_free_(max_free),
target_utilization_(target_utilization),
- foreground_heap_growth_multiplier_(foreground_heap_growth_multiplier),
+ foreground_heap_growth_multiplier_(
+ foreground_heap_growth_multiplier + kExtraHeapGrowthMultiplier),
total_wait_time_(0),
verify_object_mode_(kVerifyObjectModeDisabled),
disable_moving_gc_count_(0),
