#!/usr/bin/env python # Copyright (c) 2019 The WebRTC project authors. All Rights Reserved. # # Use of this source code is governed by a BSD-style license # that can be found in the LICENSE file in the root of the source # tree. An additional intellectual property rights grant can be found # in the file PATENTS. All contributing project authors may # be found in the AUTHORS file in the root of the source tree. """Plots metrics from stdin.
Expected format:
PLOTTABLE_DATA: <json data>
Where json data has the following format:
{ "graph_name": "", "trace_name": "", "units": "", "mean": <mean value>, "std": <standard deviation value>, "samples": [
{ "time": <sample time in us>, "value": <sample value> },
...
]
} """
import argparse import fileinput import json import matplotlib.pyplot as plt
LINE_PREFIX = 'PLOTTABLE_DATA: '
GRAPH_NAME = 'graph_name'
TRACE_NAME = 'trace_name'
UNITS = 'units'
MICROSECONDS_IN_SECOND = 1e6
def main():
parser = argparse.ArgumentParser(
description='Plots metrics exported from WebRTC perf tests')
parser.add_argument( '-m', '--metrics',
type=str,
nargs='*',
help= 'Metrics to plot. If nothing specified then will plot all available')
args = parser.parse_args()
metrics_to_plot = set() if args.metrics: for metric in args.metrics:
metrics_to_plot.add(metric)
metrics = [] for line in fileinput.input('-'):
line = line.strip() if line.startswith(LINE_PREFIX):
line = line.replace(LINE_PREFIX, '')
metrics.append(json.loads(line)) else:
print line
for metric in metrics: if len(metrics_to_plot
) > 0 and metric[GRAPH_NAME] notin metrics_to_plot: continue
x_values = []
y_values = []
start_x = None
samples = metric['samples']
samples.sort(key=lambda x: x['time']) for sample in samples: if start_x isNone:
start_x = sample['time'] # Time is us, we want to show it in seconds.
x_values.append(
(sample['time'] - start_x) / MICROSECONDS_IN_SECOND)
y_values.append(sample['value'])
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