Expose histograms via microbenchmarks

1 files changed, 10 insertions, 3 deletions

diff --git a/test/cpp/microbenchmarks/helpers.cc b/test/cpp/microbenchmarks/helpers.cc
index 415d27445f..b0caa48cd0 100644
--- a/test/cpp/microbenchmarks/helpers.cc
+++ b/test/cpp/microbenchmarks/helpers.cc
@@ -31,10 +31,17 @@ void TrackCounters::Finish(benchmark::State &state) {
 void TrackCounters::AddToLabel(std::ostream &out, benchmark::State &state) {
   grpc_stats_data stats_end;
   grpc_stats_collect(&stats_end);
+  grpc_stats_data stats;
+  grpc_stats_diff(&stats_end, &stats_begin_, &stats);
   for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
-    out << " " << grpc_stats_counter_name[i] << "/iter:"
-        << ((double)(stats_end.counters[i] - stats_begin_.counters[i]) /
-            (double)state.iterations());
+    out << " " << grpc_stats_counter_name[i]
+        << "/iter:" << ((double)stats.counters[i] / (double)state.iterations());
+  }
+  for (int i = 0; i < GRPC_STATS_HISTOGRAM_COUNT; i++) {
+    out << " " << grpc_stats_histogram_name[i] << "-median:"
+        << grpc_stats_histo_percentile(&stats, (grpc_stats_histograms)i, 50.0)
+        << " " << grpc_stats_histogram_name[i] << "-99p:"
+        << grpc_stats_histo_percentile(&stats, (grpc_stats_histograms)i, 99.0);
   }
 #ifdef GPR_LOW_LEVEL_COUNTERS
   grpc_memory_counters counters_at_end = grpc_memory_counters_snapshot();