Fixed up the Node benchmark implementation

performance/benchmark_client.js

@@ -61,6 +61,17 @@ function zeroBuffer(size) {
   return zeros;
 }
 
+/**
+ * Convert a time difference, as returned by process.hrtime, to a number of
+ * nanoseconds.
+ * @param {Array.<number>} time_diff The time diff, represented as
+ *     [seconds, nanoseconds]
+ * @return {number} The total number of nanoseconds
+ */
+function timeDiffToNanos(time_diff) {
+  return time_diff[0] * 1e9 + time_diff[1];
+}
+
 /**
  * The BenchmarkClient class. Opens channels to servers and makes RPCs based on
  * parameters from the driver, and records statistics about those RPCs.
@@ -143,9 +154,13 @@ BenchmarkClient.prototype.startClosedLoop = function(
         self.pending_calls++;
         var start_time = process.hrtime();
         client.unaryCall(argument, function(error, response) {
-          // Ignoring error for now
+          if (error) {
+            self.emit('error', new Error('Client error: ' + error.message));
+            self.running = false;
+            return;
+          }
           var time_diff = process.hrtime(start_time);
-          self.histogram.add(time_diff);
+          self.histogram.add(timeDiffToNanos(time_diff));
           makeCall(client);
           self.pending_calls--;
           if ((!self.running) && self.pending_calls == 0) {
@@ -165,13 +180,17 @@ BenchmarkClient.prototype.startClosedLoop = function(
         });
         call.on('end', function() {
           var time_diff = process.hrtime(start_time);
-          self.histogram.add(time_diff);
+          self.histogram.add(timeDiffToNanos(time_diff));
           makeCall(client);
           self.pending_calls--;
           if ((!self.running) && self.pending_calls == 0) {
             self.emit('finished');
           }
         });
+        call.on('error', function(error) {
+          self.emit('error', new Error('Client error: ' + error.message));
+          self.running = false;
+        });
       }
     };
   }
@@ -218,9 +237,13 @@ BenchmarkClient.prototype.startPoisson = function(
         self.pending_calls++;
         var start_time = process.hrtime();
         client.unaryCall(argument, function(error, response) {
-          // Ignoring error for now
+          if (error) {
+            self.emit('error', new Error('Client error: ' + error.message));
+            self.running = false;
+            return;
+          }
           var time_diff = process.hrtime(start_time);
-          self.histogram.add(time_diff);
+          self.histogram.add(timeDiffToNanos(time_diff));
           self.pending_calls--;
           if ((!self.running) && self.pending_calls == 0) {
             self.emit('finished');
@@ -241,12 +264,16 @@ BenchmarkClient.prototype.startPoisson = function(
         });
         call.on('end', function() {
           var time_diff = process.hrtime(start_time);
-          self.histogram.add(time_diff);
+          self.histogram.add(timeDiffToNanos(time_diff));
           self.pending_calls--;
           if ((!self.running) && self.pending_calls == 0) {
             self.emit('finished');
           }
         });
+        call.on('error', function(error) {
+          self.emit('error', new Error('Client error: ' + error.message));
+          self.running = false;
+        });
       } else {
         poisson.stop();
       }
@@ -303,7 +330,7 @@ BenchmarkClient.prototype.mark = function(reset) {
  */
 BenchmarkClient.prototype.stop = function(callback) {
   this.running = false;
-  self.on('finished', callback);
+  this.on('finished', callback);
 };
 
 module.exports = BenchmarkClient;

performance/histogram.js

@@ -87,6 +87,8 @@ Histogram.prototype.bucketStart = function(index) {
  * @param {number} value The value to add
  */
 Histogram.prototype.add = function(value) {
+  // Ensure value is a number
+  value = +value;
   this.sum += value;
   this.sum_of_squares += value * value;
   this.count++;

performance/worker_service_impl.js

@@ -47,6 +47,9 @@ exports.runClient = function runClient(call) {
                                    setup.client_channels,
                                    setup.histogram_params,
                                    setup.security_params);
+      client.on('error', function(error) {
+        call.emit('error', error);
+      });
       switch (setup.load_params.load) {
         case 'closed_loop':
         client.startClosedLoop(setup.outstanding_rpcs_per_channel,
@@ -65,7 +68,6 @@ exports.runClient = function runClient(call) {
             setup.load_params.load));
       }
       stats = client.mark();
-      console.log(stats);
       call.write({
         stats: stats
       });
@@ -79,8 +81,9 @@ exports.runClient = function runClient(call) {
       } else {
         call.emit('error', new Error('Got Mark before ClientConfig'));
       }
+      break;
       default:
-      throw new Error('Nonexistent client argtype option');
+      throw new Error('Nonexistent client argtype option: ' + request.argtype);
     }
   });
   call.on('end', function() {
@@ -110,10 +113,11 @@ exports.runServer = function runServer(call) {
         stats = server.mark(request.mark.reset);
         call.write({
           stats: stats,
-          port: server.getPort()
+          port: server.getPort(),
+          cores: 1
         });
       } else {
-        call.emit('error', new Error('Got Mark befor ServerConfig'));
+        call.emit('error', new Error('Got Mark before ServerConfig'));
       }
       break;
       default: