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##############################################################################
# Copyright (c) 2015 Ericsson AB and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import pkg_resources
import logging
import json
import yardstick.ssh as ssh
from yardstick.benchmark.scenarios import base
LOG = logging.getLogger(__name__)
class Perf(base.Scenario):
"""Execute perf benchmark in a host
Parameters
events - perf tool software, hardware or tracepoint events
type: [str]
unit: na
default: ['task-clock']
load - simulate load on the host by doing IO operations
type: bool
unit: na
default: false
For more info about perf and perf events see https://perf.wiki.kernel.org
"""
__scenario_type__ = "Perf"
TARGET_SCRIPT = 'perf_benchmark.bash'
def __init__(self, context):
self.context = context
self.setup_done = False
def setup(self):
"""scenario setup"""
self.target_script = pkg_resources.resource_filename(
'yardstick.benchmark.scenarios.compute', Perf.TARGET_SCRIPT)
user = self.context.get('user', 'ubuntu')
host = self.context.get('host', None)
key_filename = self.context.get('key_filename', '~/.ssh/id_rsa')
LOG.info("user:%s, host:%s", user, host)
self.client = ssh.SSH(user, host, key_filename=key_filename)
self.client.wait(timeout=600)
# copy script to host
self.client.run("cat > ~/perf_benchmark.sh",
stdin=open(self.target_script, "rb"))
self.setup_done = True
def run(self, args):
"""execute the benchmark"""
if not self.setup_done:
self.setup()
options = args['options']
events = options.get('events', ['task-clock'])
events_string = ""
for event in events:
events_string += event + " "
# if run by a duration runner
duration_time = self.context.get("duration", None)
# if run by an arithmetic runner
arithmetic_time = options.get("duration", None)
if duration_time:
duration = duration_time
elif arithmetic_time:
duration = arithmetic_time
else:
duration = 30
if 'load' in options:
load = "dd if=/dev/urandom of=/dev/null"
else:
load = "sleep %d" % duration
cmd = "sudo bash perf_benchmark.sh '%s' %d %s" \
% (load, duration, events_string)
LOG.debug("Executing command: %s", cmd)
status, stdout, stderr = self.client.execute(cmd)
if status:
raise RuntimeError(stdout)
output = json.loads(stdout)
if "sla" in args:
metric = args['sla']['metric']
exp_val = args['sla']['expected_value']
smaller_than_exp = 'smaller_than_expected' in args['sla']
if metric not in output:
assert False, "Metric (%s) not found." % metric
else:
if smaller_than_exp:
assert output[metric] < exp_val, "%s %d >= %d (sla)" \
% (metric, output[metric], exp_val)
else:
assert output[metric] >= exp_val, "%s %d < %d (sla)" \
% (metric, output[metric], exp_val)
return output
def _test():
"""internal test function"""
key_filename = pkg_resources.resource_filename('yardstick.resources',
'files/yardstick_key')
ctx = {'host': '172.16.0.137',
'user': 'ubuntu',
'key_filename': key_filename
}
logger = logging.getLogger('yardstick')
logger.setLevel(logging.DEBUG)
p = Perf(ctx)
options = {'load': True}
args = {'options': options}
result = p.run(args)
print result
if __name__ == '__main__':
_test()
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