scalability-benchmark: refactoring and parametrizable test duration

- test duration is get from testsuite definition
- refactoring and cleanup in runScalabilityTestSuite and benchmark
- request timeout in metric thread

/reviewed-on nexedi/erp5!607

erp5/util/benchmark/performance_tester.py

@@ -113,6 +113,11 @@ class PerformanceTester(object):
                         help='Repeat the benchmark suite N times for a given '
                              'number of users (default: infinite)')
 
+    parser.add_argument('--duration',
+                        type=int,
+                        default=0,
+                        help='Repeat the benchmark suite until time duration is reached')
+
     parser.add_argument('--repeat-range',
                         type=ArgumentType.checkIntValueWrapper(minimum=1),
                         default=-1,

erp5/util/benchmark/process.py

@@ -31,6 +31,7 @@ import traceback
 import signal
 import sys
 import socket
+import time
 
 from ..testbrowser.browser import Browser
 from .result import NothingFlushedException
@@ -158,20 +159,28 @@ class BenchmarkProcess(multiprocessing.Process):
     exit_status = 0
     exit_msg = None
 
-    try:
-      with result_instance as result:
-        self._browser = self.getBrowser(result_instance.log_file)
-
-        while self._current_repeat != (self._argument_namespace.repeat + 1):
+    def runIteration(result):
       self._logger.info("Iteration: %d" % self._current_repeat)
       self.runBenchmarkSuiteList(result)
-
       if not self._current_repeat % REPEAT_NUMBER_BEFORE_FLUSHING:
         try:
           result.flush()
         except NothingFlushedException:
           pass
 
+    try:
+      with result_instance as result:
+        self._browser = self.getBrowser(result_instance.log_file)
+        if self._argument_namespace.duration > 0:
+          self._logger.info("Iterate until duration %d" % self._argument_namespace.duration)
+          start_time = time.time()
+          while self._argument_namespace.duration > (time.time()-start_time):
+            runIteration(result)
+            self._current_repeat += 1
+        else:
+          self._logger.info("Iterate until repeat %d" % self._argument_namespace.repeat)
+          while self._current_repeat != (self._argument_namespace.repeat + 1):
+            runIteration(result)
             self._current_repeat += 1
 
     except StopIteration, e:

erp5/util/benchmark/thread.py

@@ -56,7 +56,7 @@ class TestMetricThread(threading.Thread):
     while(not self.stop_event.is_set()):
       self.stop_event.wait(-time.time() % self.interval)
       try:
-        response = requests.get(self.metric_url)
+        response = requests.get(self.metric_url, timeout=60)
         if response.status_code == 200:
           self.metric_list.append(response.text)
         else:
@@ -71,6 +71,3 @@ class TestMetricThread(threading.Thread):
 
   def getErrorMessage(self):
     return self.error_message
-
-
-