Address review comments

benchmark/benchmark.go

@@ -173,6 +173,10 @@ func DoStreamingRoundTrip(stream testpb.BenchmarkService_StreamingCallClient, re
 		return grpc.Errorf(grpc.Code(err), "StreamingCall(_).Send: %v", grpc.ErrorDesc(err))
 	}
 	if _, err := stream.Recv(); err != nil {
+		// EOF should be a valid error here.
+		if err == io.EOF {
+			return nil
+		}
 		return grpc.Errorf(grpc.Code(err), "StreamingCall(_).Recv: %v", grpc.ErrorDesc(err))
 	}
 	return nil

benchmark/grpc_testing/control.proto

@@ -1,4 +1,4 @@
-// Copyright 2015, Google Inc.
+// Copyright 2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without

benchmark/grpc_testing/messages.proto

@@ -1,5 +1,4 @@
-
-// Copyright 2015-2016, Google Inc.
+// Copyright 2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without

benchmark/grpc_testing/payloads.proto

@@ -1,4 +1,4 @@
-// Copyright 2015, Google Inc.
+// Copyright 2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without

benchmark/grpc_testing/services.proto

@@ -1,4 +1,4 @@
-// Copyright 2015, Google Inc.
+// Copyright 2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without

benchmark/grpc_testing/stats.proto

@@ -1,4 +1,4 @@
-// Copyright 2015, Google Inc.
+// Copyright 2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -45,8 +45,8 @@ message ServerStats {
 
 // Histogram params based on grpc/support/histogram.c
 message HistogramParams {
-  double resolution = 1;   // first bucket is [0, 1 + resolution)
-  double max_possible = 2; // use enough buckets to allow this value
+  double resolution = 1;    // first bucket is [0, 1 + resolution)
+  double max_possible = 2;  // use enough buckets to allow this value
 }
 
 // Histogram data based on grpc/support/histogram.c

benchmark/stats/histogram.go

@@ -145,6 +145,7 @@ func NewHistogram(opts HistogramOptions) *Histogram {
 	return &h
 }
 
+// Clear resets all the content of histogram.
 func (h *Histogram) Clear() {
 	h.count = newCounter()
 	h.sum = newCounter()