Add audio_CrasOutputStress test
This test repeatedly add output streams of random sample rate
and block size and remove them to check if output buffer would
drift to unreasonable high level.
BUG=chromium:623868
TEST=Run audio_CrasOutputStress on Pixel.
Change-Id: I7acc944d35853e132c69d37dd975e4aa0b173aa2
Reviewed-on: https://chromium-review.googlesource.com/360785
Commit-Ready: Hsinyu Chao <hychao@chromium.org>
Tested-by: Hsinyu Chao <hychao@chromium.org>
Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
(cherry picked from commit 62bf1f449b0c4a5f2d1c9e6a357f362ca4df5f48)
Reviewed-on: https://chromium-review.googlesource.com/362795
Reviewed-by: Hsinyu Chao <hychao@chromium.org>
Commit-Queue: Hsinyu Chao <hychao@chromium.org>
diff --git a/client/site_tests/audio_CrasOutputStress/audio_CrasOutputStress.py b/client/site_tests/audio_CrasOutputStress/audio_CrasOutputStress.py
new file mode 100755
index 0000000..3e7514a
--- /dev/null
+++ b/client/site_tests/audio_CrasOutputStress/audio_CrasOutputStress.py
@@ -0,0 +1,74 @@
+# Copyright 2016 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import logging
+import random
+import re
+import subprocess
+import time
+
+from autotest_lib.client.bin import test
+from autotest_lib.client.common_lib import error
+
+
+class audio_CrasOutputStress(test.test):
+ """Checks if output buffer will drift to super high level."""
+ version = 1
+ _MAX_OUTPUT_STREAMS = 3
+ _LOOP_COUNT = 300
+ _OUTPUT_BUFFER_LEVEL = '.*?SET_DEV_WAKE.*?hw_level.*?(\d+).*?'
+ _BUFFER_DRIFT_CRITERIA = 4096
+
+ def run_once(self):
+ """
+ Repeatedly add output streams of random configurations and
+ remove them to verify if output buffer level would drift.
+ """
+ self._output_streams = []
+ self._rates = ['48000', '44100']
+ self._block_sizes = ['512', '1024']
+
+ loop_count = 0
+ while loop_count < self._LOOP_COUNT:
+ if len(self._output_streams) < self._MAX_OUTPUT_STREAMS:
+ cmd = ['cras_test_client', '--playback_file', '/dev/zero',
+ '--rate', self._rates[random.randint(0, 1)],
+ '--block_size', self._block_sizes[random.randint(0, 1)]]
+ proc = subprocess.Popen(cmd)
+ self._output_streams.append(proc)
+ time.sleep(0.01)
+ else:
+ self._output_streams[0].kill()
+ self._output_streams.remove(self._output_streams[0])
+ time.sleep(0.1)
+ loop_count += 1
+
+ # Get the buffer level.
+ buffer_level = self._get_buffer_level()
+
+ # Clean up all streams.
+ while len(self._output_streams) > 0:
+ self._output_streams[0].kill()
+ self._output_streams.remove(self._output_streams[0])
+
+ if buffer_level > self._BUFFER_DRIFT_CRITERIA:
+ raise error.TestFail('Buffer level %d drift too high', buffer_level)
+
+ def _get_buffer_level(self):
+ """Gets a rough number about current buffer level.
+
+ @returns: The current buffer level.
+
+ """
+ proc = subprocess.Popen(['cras_test_client', '--dump_a'], stdout=subprocess.PIPE)
+ output, err = proc.communicate()
+ buffer_level = 0
+ for line in output.split('\n'):
+ search = re.match(self._OUTPUT_BUFFER_LEVEL, line)
+ if search:
+ tmp = int(search.group(1))
+ if tmp > buffer_level:
+ buffer_level = tmp
+ return buffer_level
+
diff --git a/client/site_tests/audio_CrasOutputStress/control b/client/site_tests/audio_CrasOutputStress/control
new file mode 100644
index 0000000..32552fd
--- /dev/null
+++ b/client/site_tests/audio_CrasOutputStress/control
@@ -0,0 +1,21 @@
+# Copyright 2016 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+AUTHOR = 'The Chromium OS Authors,chromeos-audio@google.com'
+NAME = 'audio_CrasOutputStress'
+ATTRIBUTES = "suite:audio"
+PURPOSE = 'Test output buffer can stay at reasonable level'
+CRITERIA = """
+Fail if output buffer drifts too high.
+"""
+TIME='MEDIUM'
+TEST_CATEGORY = 'Functional'
+TEST_CLASS = "audio"
+TEST_TYPE = 'client'
+
+DOC = """
+Test output buffer can stay at reasonable level
+"""
+
+job.run_test('audio_CrasOutputStress')
