Improve histogram and timing logger dumping.

We now dump the sum (total time) of each histogram as well as
previous stats. This is useful for the GC since the same split can
occur multiple times per GC iteration. Also did a few memory
optimizations by changing the map in the cumulative loggers
to be a set.

Bug: 11789200
Change-Id: I67bcc5384200924c8dc5d9eebcff077ce72b7e57

1 files changed, 9 insertions, 1 deletions

diff --git a/runtime/base/histogram-inl.h b/runtime/base/histogram-inl.h
index 9e08ae6feb..4cd68cda44 100644
--- a/runtime/base/histogram-inl.h
+++ b/runtime/base/histogram-inl.h
@@ -39,6 +39,13 @@ template <class Value> inline void Histogram<Value>::AddValue(Value value) {
   BucketiseValue(value);
 }
 
+template <class Value> inline Histogram<Value>::Histogram(const char* name)
+    : kAdjust(0),
+      kInitialBucketCount(0),
+      name_(name),
+      max_buckets_(0) {
+}
+
 template <class Value>
 inline Histogram<Value>::Histogram(const char* name, Value initial_bucket_width,
                                    size_t max_buckets)
@@ -162,8 +169,9 @@ inline void Histogram<Value>::PrintConfidenceIntervals(std::ostream &os, double
 
   double per_0 = (1.0 - interval) / 2.0;
   double per_1 = per_0 + interval;
-  os << Name() << ":\t";
   TimeUnit unit = GetAppropriateTimeUnit(Mean() * kAdjust);
+  os << Name() << ":\tSum: ";
+  os << PrettyDuration(Sum() * kAdjust) << " ";
   os << (interval * 100) << "% C.I. " << FormatDuration(Percentile(per_0, data) * kAdjust, unit);
   os << "-" << FormatDuration(Percentile(per_1, data) * kAdjust, unit) << " ";
   os << "Avg: " << FormatDuration(Mean() * kAdjust, unit) << " Max: ";