Rename load_test to isolateserver_load_test, create swarming_load_test.

tools/swarming_load_test_client.py

Index: tools/swarming_load_test_client.py
diff --git a/tools/swarming_load_test_client.py b/tools/swarming_load_test_client.py
new file mode 100755
index 0000000000000000000000000000000000000000..5f9a100e4f309347d4578f4088fd8b5e0a79633f
--- /dev/null
+++ b/tools/swarming_load_test_client.py
@@ -0,0 +1,226 @@
+#!/usr/bin/env python
+# Copyright 2013 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.
+
+"""Triggers a ton of fake jobs to test its handling under high load.
+
+Generates an histogram with the latencies to process the tasks and number of
+retries.
+"""
+
+import json
+import logging
+import optparse
+import os
+import random
+import socket
+import string
+import sys
+import time
+
+ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+sys.path.insert(0, ROOT_DIR)
+
+from third_party import colorama
+
+import swarming
+
+from utils import graph
+from utils import net
+from utils import threading_utils
+
+
+def print_results(results, columns, buckets):
+  delays = [i for i in results if isinstance(i, float)]
+  failures = [i for i in results if not isinstance(i, float)]
+
+  graph.print_histogram(
+      graph.generate_histogram(delays, buckets), columns, '%5.3f')
+  print('')
+  print('Total items : %d' % len(results))
+  average = 0
+  if delays:
+    average = sum(delays)/ len(delays)
+  print('Average delay: %s' % graph.to_units(average))
+  #print('Average overhead: %s' % graph.to_units(total_size / len(sizes)))
+  print('')
+  if failures:
+    print('')
+    print('%sFAILURES%s:' % (colorama.Fore.RED, colorama.Fore.RESET))
+    print('\n'.join('  %s' % i for i in failures))
+
+
+def trigger_task(swarming_url, progress, unique, timeout, index):
+  """Triggers a Swarming job and collects results.
+
+  Returns the total amount of time to run a task remotely, including all the
+  overhead.
+  """
+  name = 'load-test-%d-%s' % (index, unique)
+  start = time.time()
+
+  logging.info('trigger')
+  manifest = swarming.Manifest(
+      None, name, 1, None, 'AIX', '', 'http://localhost:1', False, False, 100,
+      None)
+  data = {'request': manifest.to_json()}
+  response = net.url_open(swarming_url + '/test', data=data)

[csharp, 2013/10/03 16:08:04]

I encountered problems with this locally when I accidentally typed http://
instead of https://. The redirect seemed to cause problems because the redirect
was a GET instead of a POST (so swarm rejected it).

I didn't dig too deeply into what code in this script couldn't handle that, but
it didn't give me a nice error message so I was confused for a bit. 

+  if not response:
+    # Failed to trigger. Return a failure.
+    return 'failed_trigger'
+  result = json.load(response)
+  test_key = result['test_keys'][0].pop('test_key')
+  assert test_key
+  expected = {
+    'test_case_name': name,
+    'test_keys': [
+      {
+        'config_name': 'AIX',
+        'num_instances': 1,
+        'instance_index': 0,
+      },
+    ],
+  }
+  assert result == expected, result
+  progress.update_item('%5d' % index, processing=1)
+  try:
+    logging.info('collect')
+    test_keys = swarming.get_test_keys(swarming_url, name)
+    if not test_keys:
+      return 'no_test_keys'
+    assert test_keys == [test_key], test_keys
+    out = [
+      output
+      for _index, output in swarming.yield_results(
+          swarming_url, test_keys, timeout, None)
+    ]
+    if not out:
+      return 'no_result'
+    fqdn = socket.getfqdn().lower()
+    assert out[0].pop('machine_tag').startswith(fqdn)
+    assert out[0].pop('machine_id').startswith(fqdn)
+    expected = [
+      {
+        u'config_instance_index': 0,
+        u'exit_codes': u'0',
+        u'num_config_instances': 1,
+        u'output': u'This task ran with great success',

[csharp, 2013/10/03 16:08:04]

Could we move this into a constant shared by the two scripts so they don't need
to redefine it.

[Marc-Antoine Ruel (Google), 2013/10/03 16:47:11]

Done.

+      },
+    ]
+    assert out == expected, '\n%s\n%s' % (out, expected)
+    return time.time() - start
+  finally:
+    progress.update_item('%5d - done' % index, processing=-1, processed=1)
+
+
+def main():
+  colorama.init()
+  parser = optparse.OptionParser(description=sys.modules[__name__].__doc__)
+  parser.add_option(
+      '-S', '--swarming',
+      metavar='URL', default='',
+      help='Swarming server to use')
+
+  group = optparse.OptionGroup(parser, 'Load generated')
+  group.add_option(
+      '-s', '--send-rate', type='float', default=16., metavar='RATE',
+      help='Rate (item/s) of sending requests as a float, default: %default')
+  group.add_option(
+      '-d', '--duration', type='float', default=60., metavar='N',
+      help='Duration (s) of the sending phase of the load test, '
+           'default: %default')
+  group.add_option(
+      '-m', '--concurrent', type='int', default=200, metavar='N',
+      help='Maximum concurrent on-going requests, default: %default')
+  group.add_option(
+      '-t', '--timeout', type='float', default=3600., metavar='N',
+      help='Timeout to get results, default: %default')
+  parser.add_option_group(group)
+
+  group = optparse.OptionGroup(parser, 'Display options')
+  group.add_option(
+      '--columns', type='int', default=graph.get_console_width(), metavar='N',
+      help='For histogram display, default:%default')
+  group.add_option(
+      '--buckets', type='int', default=20, metavar='N',
+      help='Number of buckets for histogram display, default:%default')
+  parser.add_option_group(group)
+
+  parser.add_option(
+      '--dump', metavar='FOO.JSON', help='Dumps to json file')
+  parser.add_option(
+      '-v', '--verbose', action='store_true', help='Enables logging')
+
+  options, args = parser.parse_args()
+  logging.basicConfig(level=logging.INFO if options.verbose else logging.FATAL)
+  if args:
+    parser.error('Unsupported args: %s' % args)
+  options.swarming = options.swarming.rstrip('/')
+  if not options.swarming:
+    parser.error('--swarming is required.')
+  if options.duration <= 0:
+    parser.error('Needs --duration > 0. 0.01 is a valid value.')
+
+  total = options.send_rate * options.duration
+  print(
+      'Sending %.1f i/s for %ds with max %d parallel requests; timeout %.1fs; '
+      'total %d' %
+        (options.send_rate, options.duration, options.concurrent,
+        options.timeout, total))
+  print('[processing/processed/todo]')
+
+  # This is used so there's no clash between runs and actual real usage.
+  unique = ''.join(random.choice(string.ascii_letters) for _ in range(8))
+  columns = [('processing', 0), ('processed', 0), ('todo', 0)]
+  progress = threading_utils.Progress(columns)
+  index = 0
+  with threading_utils.ThreadPoolWithProgress(
+      progress, 1, options.concurrent, 0) as pool:
+    try:
+      start = time.time()
+      while True:
+        duration = time.time() - start
+        if duration > options.duration:
+          break
+        should_have_triggered = int(duration * options.send_rate)

[csharp, 2013/10/03 16:08:04]

Nit: should_have_triggered -> should_have_triggered_so_far
(It took me a bit to figure out how this worked to spread out the tests)

[Marc-Antoine Ruel (Google), 2013/10/03 16:47:11]

Done.

+        while index < should_have_triggered:
+          pool.add_task(
+              0,
+              trigger_task,
+              options.swarming,
+              progress,
+              unique,
+              options.timeout,
+              index)
+          progress.update_item('', todo=1)
+          index += 1
+          progress.print_update()
+        time.sleep(0.01)
+    except KeyboardInterrupt:
+      aborted = pool.abort()
+      progress.update_item(
+          'Got Ctrl-C. Aborted %d unsent tasks.' % aborted,
+          raw=True,
+          todo=-aborted)
+      progress.print_update()
+    finally:
+      # TODO(maruel): We could give up on collecting results for the on-going
+      # tasks but that would need to be optional.
+      progress.update_item('Getting results for on-going tasks.', raw=True)
+      results = sorted(pool.join())
+  progress.print_update()
+  # At this point, progress is not used anymore.
+  print('')
+  print(' - Took %.1fs.' % (time.time() - start))
+  print('')
+  print_results(results, options.columns, options.buckets)
+  if options.dump:
+    with open(options.dump, 'w') as f:
+      json.dump(results, f, separators=(',',':'))
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())