Add a perf subdirectory under tools and a simple script to collect chromium.perf success stats.

scripts/tools/perf/chrome-perf-stats.py

Index: scripts/tools/perf/chrome-perf-stats.py
diff --git a/scripts/tools/perf/chrome-perf-stats.py b/scripts/tools/perf/chrome-perf-stats.py
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+++ b/scripts/tools/perf/chrome-perf-stats.py
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+#!/usr/bin/env python2.7
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Script to pull chromium.perf stats from chrome-infra-stats API.
+
+Currently this just pulls success rates from the API, averages daily per
+builder, and outputs a CSV. It could be improved to provide more detailed
+success rates or build times.
+
+The API documentation for chrome-infra-stats is at:
+https://apis-explorer.appspot.com/apis-explorer/?
+   base=https://chrome-infra-stats.appspot.com/_ah/api#p/
+"""
+import calendar
+import csv
+import json
+import sys
+import urllib
+import urllib2
+
+BUILDER_LIST_URL = ('https://chrome-infra-stats.appspot.com/'
+                    '_ah/api/stats/v1/masters/chromium.perf')
+
+BUILDER_STATS_URL = ('https://chrome-infra-stats.appspot.com/_ah/api/stats/v1/'
+                     'stats/chromium.perf/%s/overall__build__result__/%s')
+
+USAGE = 'Usage: chrome-perf-stats.py <outfilename> <year> <month> [<day>]'
+
+if len(sys.argv) != 4 and len(sys.argv) != 5:
+  print USAGE
+  sys.exit(0)
+outfilename = sys.argv[1]
+year = int(sys.argv[2])
+if year > 2016 or year < 2014:
+  print USAGE
+  sys.exit(0)
+month = int(sys.argv[3])
+if month > 12 or month <= 0:
+  print USAGE
+  sys.exit(0)
+days = range(1, calendar.monthrange(year, month)[1] + 1)
+if len(sys.argv) == 5:
+  day = int(sys.argv[4])
+  if day > 31 or day <=0:
+    print USAGE
+    sys.exit(0)
+  days = [day]
+
+response = urllib2.urlopen(BUILDER_LIST_URL)
+builders = [builder['name'] for builder in json.load(response)['builders']]
+
+success_rates = {}
+
+for day in days:
+  for hour in range(24):
+    date_str = '%d-%02d-%02dT%02d:00Z' % (year, month, day, hour)
+    date_dict_str = '%d-%02d-%02d' % (year, month, day)
+    for builder in builders:
+      url = BUILDER_STATS_URL % (urllib.quote(builder), urllib.quote(date_str))
+      print url
+      response = urllib2.urlopen(url)
+      results = json.load(response)
+      count = int(results['count'])
+      if count == 0:
+        continue
+      success_count = count - int(results['failure_count'])
+      success_rates.setdefault(date_dict_str, {})
+      success_rates[date_dict_str].setdefault(builder, {
+          'count': 0,
+          'success_count': 0
+      })
+      success_rates[date_dict_str][builder]['count'] += count
+      success_rates[date_dict_str][builder]['success_count'] += success_count
+
+overall_success_rates = []
+for day, results in success_rates.iteritems():
+  success_rate_sum = 0
+  success_rate_count = 0
+  for builder, rates in results.iteritems():
+    if rates['count'] == 0:
+      continue
+    success_rate_sum += (float(rates['success_count']) / float(rates['count']))
+    success_rate_count += 1
+  overall_success_rates.append(
+      [day, float(success_rate_sum) / float(success_rate_count)])
+
+  with open(outfilename, 'wb') as f:
+    writer = csv.writer(f)
+    writer.writerows(overall_success_rates)