class Lmbench(base.Scenario):
- """Execute lmbench memory read latency benchmark in a host
+ """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
unit: megabytes
default: 16
- Results are accurate to the ~2-5 nanosecond range.
+ 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"
- TARGET_SCRIPT = "lmbench_benchmark.bash"
+ 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
def setup(self):
"""scenario setup"""
- self.target_script = pkg_resources.resource_filename(
+ self.bandwidth_target_script = pkg_resources.resource_filename(
"yardstick.benchmark.scenarios.compute",
- Lmbench.TARGET_SCRIPT)
+ 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)
self.client = ssh.SSH(user, ip, key_filename=key_filename)
self.client.wait(timeout=600)
- # copy script to host
- self.client.run("cat > ~/lmbench.sh",
- stdin=open(self.target_script, 'rb'))
-
+ # 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
def run(self, result):
self.setup()
options = self.scenario_cfg['options']
- stride = options.get('stride', 128)
- stop_size = options.get('stop_size', 16)
+ test_type = options.get('test_type', 'latency')
+
+ if test_type == 'latency':
+ stride = options.get('stride', 128)
+ stop_size = options.get('stop_size', 16)
+ cmd = "sudo bash lmbench_latency.sh %d %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)
- cmd = "sudo bash lmbench.sh %d %d" % (stop_size, stride)
LOG.debug("Executing command: %s", cmd)
status, stdout, stderr = self.client.execute(cmd)
if status:
raise RuntimeError(stderr)
- result.update({"latencies": json.loads(stdout)})
+ if test_type == 'latency':
+ result.update({"latencies": json.loads(stdout)})
+ else:
+ result.update(json.loads(stdout))
+
if "sla" in self.scenario_cfg:
sla_error = ""
- sla_max_latency = int(self.scenario_cfg['sla']['max_latency'])
- for t_latency in result:
- latency = t_latency['latency']
- if latency > sla_max_latency:
- sla_error += "latency %f > sla:max_latency(%f); " \
- % (latency, sla_max_latency)
+ 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
logger = logging.getLogger('yardstick')
logger.setLevel(logging.DEBUG)
- options = {'stride': 128, 'stop_size': 16}
- args = {'options': options}
+ 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)
Code Review / yardstick.git / blobdiff