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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
##############################################################################
from __future__ import absolute_import
from __future__ import print_function
import logging
import pkg_resources
from oslo_serialization import jsonutils
import yardstick.ssh as ssh
from yardstick.common import utils
from yardstick.benchmark.scenarios import base
LOG = logging.getLogger(__name__)
class Lmbench(base.Scenario):
"""Execute lmbench memory read latency or memory bandwidth benchmark in a host
Parameters
test_type - specifies whether to measure memory latency or bandwidth
type: string
unit: na
default: "latency"
Parameters for memory read latency benchmark
stride - number of locations in memory between starts of array elements
type: int
unit: bytes
default: 128
stop_size - maximum array size to test (minimum value is 0.000512)
type: float
unit: megabytes
default: 16.0
Results are accurate to the ~2-5 nanosecond range.
Parameters for memory bandwidth benchmark
size - the amount of memory to test
type: int
unit: kilobyte
default: 128
benchmark - the name of the memory bandwidth benchmark test to execute.
Valid test names are rd, wr, rdwr, cp, frd, fwr, fcp, bzero, bcopy
type: string
unit: na
default: "rd"
warmup - the number of repetitons to perform before taking measurements
type: int
unit: na
default: 0
more info http://manpages.ubuntu.com/manpages/trusty/lmbench.8.html
"""
__scenario_type__ = "Lmbench"
LATENCY_BENCHMARK_SCRIPT = "lmbench_latency_benchmark.bash"
BANDWIDTH_BENCHMARK_SCRIPT = "lmbench_bandwidth_benchmark.bash"
LATENCY_CACHE_SCRIPT = "lmbench_latency_for_cache.bash"
def __init__(self, scenario_cfg, context_cfg):
self.scenario_cfg = scenario_cfg
self.context_cfg = context_cfg
self.setup_done = False
def setup(self):
"""scenario setup"""
self.bandwidth_target_script = pkg_resources.resource_filename(
"yardstick.benchmark.scenarios.compute",
Lmbench.BANDWIDTH_BENCHMARK_SCRIPT)
self.latency_target_script = pkg_resources.resource_filename(
"yardstick.benchmark.scenarios.compute",
Lmbench.LATENCY_BENCHMARK_SCRIPT)
self.latency_for_cache_script = pkg_resources.resource_filename(
"yardstick.benchmark.scenarios.compute",
Lmbench.LATENCY_CACHE_SCRIPT)
host = self.context_cfg["host"]
self.client = ssh.SSH.from_node(host, defaults={"user": "ubuntu"})
self.client.wait(timeout=600)
# copy scripts to host
self.client._put_file_shell(
self.latency_target_script, '~/lmbench_latency.sh')
self.client._put_file_shell(
self.bandwidth_target_script, '~/lmbench_bandwidth.sh')
self.client._put_file_shell(
self.latency_for_cache_script, '~/lmbench_latency_for_cache.sh')
self.setup_done = True
def run(self, result):
"""execute the benchmark"""
if not self.setup_done:
self.setup()
options = self.scenario_cfg['options']
test_type = options.get('test_type', 'latency')
if test_type == 'latency':
stride = options.get('stride', 128)
stop_size = options.get('stop_size', 16.0)
cmd = "sudo bash lmbench_latency.sh %f %d" % (stop_size, stride)
elif test_type == 'bandwidth':
size = options.get('size', 128)
benchmark = options.get('benchmark', 'rd')
warmup_repetitions = options.get('warmup', 0)
cmd = "sudo bash lmbench_bandwidth.sh %d %s %d" % \
(size, benchmark, warmup_repetitions)
elif test_type == 'latency_for_cache':
repetition = options.get('repetition', 1)
warmup = options.get('warmup', 0)
cmd = "sudo bash lmbench_latency_for_cache.sh %d %d" % \
(repetition, warmup)
else:
raise RuntimeError("No such test_type: %s for Lmbench scenario",
test_type)
LOG.debug("Executing command: %s", cmd)
status, stdout, stderr = self.client.execute(cmd)
if status:
raise RuntimeError(stderr)
lmbench_result = {}
if test_type == 'latency':
lmbench_result.update(
{"latencies": jsonutils.loads(stdout)})
else:
lmbench_result.update(jsonutils.loads(stdout))
result.update(utils.flatten_dict_key(lmbench_result))
if "sla" in self.scenario_cfg:
sla_error = ""
if test_type == 'latency':
sla_max_latency = int(self.scenario_cfg['sla']['max_latency'])
for t_latency in lmbench_result["latencies"]:
latency = t_latency['latency']
if latency > sla_max_latency:
sla_error += "latency %f > sla:max_latency(%f); " \
% (latency, sla_max_latency)
elif test_type == 'bandwidth':
sla_min_bw = int(self.scenario_cfg['sla']['min_bandwidth'])
bw = lmbench_result["bandwidth(MBps)"]
if bw < sla_min_bw:
sla_error += "bandwidth %f < " \
"sla:min_bandwidth(%f)" % (bw, sla_min_bw)
elif test_type == 'latency_for_cache':
sla_latency = float(self.scenario_cfg['sla']['max_latency'])
cache_latency = float(lmbench_result['L1cache'])
if sla_latency < cache_latency:
sla_error += "latency %f > sla:max_latency(%f); " \
% (cache_latency, sla_latency)
assert sla_error == "", sla_error
def _test():
"""internal test function"""
key_filename = pkg_resources.resource_filename('yardstick.resources',
'files/yardstick_key')
ctx = {
'host': {
'ip': '10.229.47.137',
'user': 'root',
'key_filename': key_filename
}
}
logger = logging.getLogger('yardstick')
logger.setLevel(logging.DEBUG)
options = {
'test_type': 'latency',
'stride': 128,
'stop_size': 16
}
sla = {'max_latency': 35, 'action': 'monitor'}
args = {'options': options, 'sla': sla}
result = {}
p = Lmbench(args, ctx)
p.run(result)
print(result)
if __name__ == '__main__':
_test()
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