Source code for yardstick.benchmark.scenarios.compute.lmbench

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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__)


[docs]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" def __init__(self, scenario_cfg, context_cfg): self.scenario_cfg = scenario_cfg self.context_cfg = context_cfg self.setup_done = False
[docs] 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) host = self.context_cfg["host"] user = host.get("user", "ubuntu") ip = host.get("ip", None) key_filename = host.get('key_filename', "~/.ssh/id_rsa") LOG.info("user:%s, host:%s", user, ip) self.client = ssh.SSH(user, ip, key_filename=key_filename) self.client.wait(timeout=600) # copy scripts to host self.client.run("cat > ~/lmbench_latency.sh", stdin=open(self.latency_target_script, 'rb')) self.client.run("cat > ~/lmbench_bandwidth.sh", stdin=open(self.bandwidth_target_script, 'rb')) self.setup_done = True
[docs] 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) 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) if test_type == 'latency': result.update({"latencies": json.loads(stdout)}) else: result.update(json.loads(stdout)) 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 result["latencies"]: latency = t_latency['latency'] if latency > sla_max_latency: sla_error += "latency %f > sla:max_latency(%f); " \ % (latency, sla_max_latency) else: sla_min_bw = int(self.scenario_cfg['sla']['min_bandwidth']) bw = result["bandwidth(MBps)"] if bw < sla_min_bw: sla_error += "bandwidth %f < " \ "sla:min_bandwidth(%f)" % (bw, sla_min_bw) 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()