message: tf.Benchmark: add mean and stdev of the wall time to unreported extras.
diff: @@ -18,6 +18,7 @@ from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  +import math
  import numbers
  import os
  import re
  @@ -379,6 +380,16 @@ class TensorFlowBenchmark(Benchmark):
  lm1 = l - 1
  return (s[l//2] + s[lm1//2]) / 2.0
  + def _mean_and_stdev(x):
  + if not x:
  + return -1, -1
  + l = len(x)
  + mean = sum(x) / l
  + if l == 1:
  + return mean, -1
  + variance = sum([(e - mean) * (e - mean) for e in x]) / (l - 1)
  + return mean, math.sqrt(variance)
  +
  median_delta = _median(deltas)
  benchmark_values = {
  @@ -389,6 +400,10 @@ class TensorFlowBenchmark(Benchmark):
  "throughput": mbs / median_delta
  }
  self.report_benchmark(**benchmark_values)
  +
  + mean_delta, stdev_delta = _mean_and_stdev(deltas)
  + unreported_extras["wall_time_mean"] = mean_delta
  + unreported_extras["wall_time_stdev"] = stdev_delta
  benchmark_values["extras"].update(unreported_extras)
  return benchmark_values
  