forked from samdemers/lttng-ust-benchmarks
/
benchmarks.py
executable file
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/
benchmarks.py
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#!/usr/bin/env python3
import collections
import json, numbers, pprint, platform, tempfile, uuid
import os, shutil, subprocess, signal
import lttng
runner_bin = "./lttng-ust-benchmarks"
props_dir = "./jenkins_plot_data"
js_out = "./benchmarks.json"
passes = 100
tmp_dir = tempfile.mkdtemp()
session_name = str(uuid.uuid1())
trace_path = tmp_dir + "/" + session_name
sessiond_pidfile = tmp_dir + "/lttng-sessiond.pid"
def lttng_start():
if lttng.session_daemon_alive() == 0:
daemon_cmd = "lttng-sessiond --daemonize --quiet"
daemon_cmd += " --pidfile " + sessiond_pidfile
subprocess.check_call(daemon_cmd, shell=True)
lttng.destroy(session_name)
ret = lttng.create_snapshot(session_name, trace_path)
if ret < 0:
raise RuntimeError("LTTng: " + lttng.strerror(ret))
domain = lttng.Domain()
domain.type = lttng.DOMAIN_UST
channel = lttng.Channel()
channel.name = "channel0"
lttng.channel_set_default_attr(domain, channel.attr)
han = lttng.Handle(session_name, domain)
if han is None:
raise RuntimeError("LTTng: failed to create handle")
res = lttng.enable_channel(han, channel)
if res < 0:
raise RuntimeError("LTTng: " + lttng.strerror(ret))
event = lttng.Event()
event.name = "*"
event.type = lttng.EVENT_TRACEPOINT
event.loglevel = lttng.EVENT_LOGLEVEL_ALL
ret = lttng.enable_event(han, event, channel.name)
if ret < 0:
raise RuntimeError("LTTng: " + lttng.strerror(ret))
ret = lttng.start(session_name)
if ret < 0:
raise RuntimeError("LTTng: " + lttng.strerror(ret))
def lttng_stop():
ret = lttng.stop(session_name)
if ret < 0:
raise RuntimeError("LTTng: " + lttng.strerror(ret))
ret = lttng.destroy(session_name)
if ret < 0:
raise RuntimeError("LTTng: " + lttng.strerror(ret))
def run_benchmark(args, with_ust = False):
if with_ust:
lttng_start()
output = subprocess.check_output([runner_bin] + args)
if with_ust:
lttng_stop()
return json.loads(output.decode())
def run_benchmarks(benchmarks):
results = {}
for name in benchmarks.keys():
benchmark = benchmarks[name]
base = run_benchmark(benchmark["baseline"], False)
base_start = base["main"] - base["exec"]
base_run = base["end"] - base["start"]
ust = run_benchmark(benchmark["ust"], False)
ust_start = ust["main"] - ust["exec"]
ust_run = ust["end"] - ust["start"]
ust_start_overhead = ust_start - base_start
ust_en = run_benchmark(benchmark["ust"], True)
ust_en_start = ust_en["main"] - ust_en["exec"]
ust_en_run = ust_en["end"] - ust_en["start"]
ust_en_start_overhead = ust_en_start - base_start
results[name] = {
"baseline": {
"args": benchmark["baseline"],
"start_time": base_start,
"run_time": base_run
},
"tracing_disabled": {
"args": benchmark["ust"],
"start_time": ust_start,
"run_time": ust_run,
"ns_per_event": (ust_run - base_run)*1E9 / benchmark["nr_loops"],
"start_overhead_s": ust_start_overhead,
"start_overhead_pct": ust_start_overhead * 100 / base_start
},
"tracing_enabled": {
"args": benchmark["ust"],
"start_time": ust_en_start,
"run_time": ust_en_run,
"event_count": benchmark["nr_loops"],
"ns_per_event": (ust_en_run - base_run)*1E9 / benchmark["nr_loops"],
"start_overhead_s": ust_en_start_overhead,
"start_overhead_pct": ust_en_start_overhead * 100 / base_start,
}
}
return results
def flatten_dict_internal(prefix, data, dst):
if issubclass(data.__class__, str):
dst[prefix] = data
elif issubclass(data.__class__, collections.Mapping):
for key in data.keys():
fullprefix = prefix + "." + key if len(prefix) > 0 else key
flatten_dict_internal(fullprefix, data[key], dst)
elif issubclass(data.__class__, collections.Iterable):
i = 0
for value in data:
fullprefix = prefix + "." + str(i)
flatten_dict_internal(fullprefix, value, dst)
i += 1
else:
dst[prefix] = data
def flatten_dict(data):
dst = dict()
flatten_dict_internal("", data, dst)
return dst
def write_plot_properties(data, dst_dir):
os.makedirs(dst_dir, 0o777, True)
flat_data = data
for key in flat_data:
f = open(dst_dir + "/" + key + ".properties", "w")
f.write("YVALUE=" + str(flat_data[key]) + "\n")
f.close()
def write_js(data, filename):
f = open(filename, "w")
pprint.pprint(data, f)
f.close()
def main():
benchmarks = {
"basic": {
# number of loops here must match nr_loops
# below.
"baseline": ["basic-benchmark", "10000000"],
"ust": ["basic-benchmark-ust", "10000000"],
"nr_loops": 10000000
},
"sha2": {
# number of loops here must match nr_loops
# below.
"baseline": ["sha2-benchmark", "1000000"],
"ust": ["sha2-benchmark-ust", "1000000"],
"nr_loops": 1000000
}
}
data = []
flat_data = []
all_keys = set()
for i in range(passes):
pass_data = run_benchmarks(benchmarks)
flat_pass_data = flatten_dict(pass_data)
data.append(pass_data)
flat_data.append(flat_pass_data)
all_keys |= flat_pass_data.keys()
avg_data = {}
for key in all_keys:
total = 0
count = 0
for flat_pass_data in flat_data:
if (isinstance(flat_pass_data[key], numbers.Number)):
total += flat_pass_data[key]
count += 1
if count > 0:
avg_data[key] = total / count
results = {
"data": data,
"platform": dict(zip(
("system", "node", "release", "version", "machine", "processor"),
platform.uname()
))
}
write_plot_properties(avg_data, props_dir)
write_js(results, js_out)
def cleanup():
lttng.stop(session_name)
lttng.destroy(session_name)
try:
f = open(sessiond_pidfile, "r")
pid = int(f.readline())
f.close()
os.kill(pid, signal.SIGTERM)
except (OSError, IOError) as e:
# Nothing to do: we may not have launched the sessiond
pass
# Ignore errors when deleting the temporary directory (otherwise
# an exception may be raised if the sessiond removes its pidfile
# while rmtree() is running).
shutil.rmtree(tmp_dir, True)
if __name__ == "__main__":
try:
main()
except KeyboardInterrupt:
pass
finally:
cleanup()