Add call size bm_diff

1 files changed, 10 insertions, 4 deletions

diff --git a/test/cpp/microbenchmarks/helpers.cc b/test/cpp/microbenchmarks/helpers.cc
index 6802a0aa99..782f12e99a 100644
--- a/test/cpp/microbenchmarks/helpers.cc
+++ b/test/cpp/microbenchmarks/helpers.cc
@@ -16,6 +16,8 @@
  *
  */
 
+#include <string.h>
+
 #include "test/cpp/microbenchmarks/helpers.h"
 
 void TrackCounters::Finish(benchmark::State &state) {
@@ -45,10 +47,14 @@ void TrackCounters::AddToLabel(std::ostream &out, benchmark::State &state) {
         << "/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);
+    std::ostringstream median_ss;
+    median_ss << grpc_stats_histogram_name[i] << "-median";
+    state.counters[median_ss.str()] = benchmark::Counter(
+        grpc_stats_histo_percentile(&stats, (grpc_stats_histograms)i, 50.0));
+    std::ostringstream tail_ss;
+    tail_ss << grpc_stats_histogram_name[i] << "-99p";
+    state.counters[tail_ss.str()] = benchmark::Counter(
+        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();