mirror of https://github.com/python/cpython
612 lines
18 KiB
Python
612 lines
18 KiB
Python
# This file should be kept compatible with both Python 2.6 and Python >= 3.0.
|
|
|
|
from __future__ import division
|
|
from __future__ import print_function
|
|
|
|
"""
|
|
ccbench, a Python concurrency benchmark.
|
|
"""
|
|
|
|
import time
|
|
import os
|
|
import sys
|
|
import itertools
|
|
import threading
|
|
import subprocess
|
|
import socket
|
|
from optparse import OptionParser, SUPPRESS_HELP
|
|
import platform
|
|
|
|
# Compatibility
|
|
try:
|
|
xrange
|
|
except NameError:
|
|
xrange = range
|
|
|
|
try:
|
|
map = itertools.imap
|
|
except AttributeError:
|
|
pass
|
|
|
|
|
|
THROUGHPUT_DURATION = 2.0
|
|
|
|
LATENCY_PING_INTERVAL = 0.1
|
|
LATENCY_DURATION = 2.0
|
|
|
|
BANDWIDTH_PACKET_SIZE = 1024
|
|
BANDWIDTH_DURATION = 2.0
|
|
|
|
|
|
def task_pidigits():
|
|
"""Pi calculation (Python)"""
|
|
_map = map
|
|
_count = itertools.count
|
|
_islice = itertools.islice
|
|
|
|
def calc_ndigits(n):
|
|
# From http://shootout.alioth.debian.org/
|
|
def gen_x():
|
|
return _map(lambda k: (k, 4*k + 2, 0, 2*k + 1), _count(1))
|
|
|
|
def compose(a, b):
|
|
aq, ar, as_, at = a
|
|
bq, br, bs, bt = b
|
|
return (aq * bq,
|
|
aq * br + ar * bt,
|
|
as_ * bq + at * bs,
|
|
as_ * br + at * bt)
|
|
|
|
def extract(z, j):
|
|
q, r, s, t = z
|
|
return (q*j + r) // (s*j + t)
|
|
|
|
def pi_digits():
|
|
z = (1, 0, 0, 1)
|
|
x = gen_x()
|
|
while 1:
|
|
y = extract(z, 3)
|
|
while y != extract(z, 4):
|
|
z = compose(z, next(x))
|
|
y = extract(z, 3)
|
|
z = compose((10, -10*y, 0, 1), z)
|
|
yield y
|
|
|
|
return list(_islice(pi_digits(), n))
|
|
|
|
return calc_ndigits, (50, )
|
|
|
|
def task_regex():
|
|
"""regular expression (C)"""
|
|
# XXX this task gives horrendous latency results.
|
|
import re
|
|
# Taken from the `inspect` module
|
|
pat = re.compile(r'^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)', re.MULTILINE)
|
|
with open(__file__, "r") as f:
|
|
arg = f.read(2000)
|
|
|
|
def findall(s):
|
|
t = time.time()
|
|
try:
|
|
return pat.findall(s)
|
|
finally:
|
|
print(time.time() - t)
|
|
return pat.findall, (arg, )
|
|
|
|
def task_sort():
|
|
"""list sorting (C)"""
|
|
def list_sort(l):
|
|
l = l[::-1]
|
|
l.sort()
|
|
|
|
return list_sort, (list(range(1000)), )
|
|
|
|
def task_compress_zlib():
|
|
"""zlib compression (C)"""
|
|
import zlib
|
|
with open(__file__, "rb") as f:
|
|
arg = f.read(5000) * 3
|
|
|
|
def compress(s):
|
|
zlib.decompress(zlib.compress(s, 5))
|
|
return compress, (arg, )
|
|
|
|
def task_compress_bz2():
|
|
"""bz2 compression (C)"""
|
|
import bz2
|
|
with open(__file__, "rb") as f:
|
|
arg = f.read(3000) * 2
|
|
|
|
def compress(s):
|
|
bz2.compress(s)
|
|
return compress, (arg, )
|
|
|
|
def task_hashing():
|
|
"""SHA1 hashing (C)"""
|
|
import hashlib
|
|
with open(__file__, "rb") as f:
|
|
arg = f.read(5000) * 30
|
|
|
|
def compute(s):
|
|
hashlib.sha1(s).digest()
|
|
return compute, (arg, )
|
|
|
|
|
|
throughput_tasks = [task_pidigits, task_regex]
|
|
for mod in 'bz2', 'hashlib':
|
|
try:
|
|
globals()[mod] = __import__(mod)
|
|
except ImportError:
|
|
globals()[mod] = None
|
|
|
|
# For whatever reasons, zlib gives irregular results, so we prefer bz2 or
|
|
# hashlib if available.
|
|
# (NOTE: hashlib releases the GIL from 2.7 and 3.1 onwards)
|
|
if bz2 is not None:
|
|
throughput_tasks.append(task_compress_bz2)
|
|
elif hashlib is not None:
|
|
throughput_tasks.append(task_hashing)
|
|
else:
|
|
throughput_tasks.append(task_compress_zlib)
|
|
|
|
latency_tasks = throughput_tasks
|
|
bandwidth_tasks = [task_pidigits]
|
|
|
|
|
|
class TimedLoop:
|
|
def __init__(self, func, args):
|
|
self.func = func
|
|
self.args = args
|
|
|
|
def __call__(self, start_time, min_duration, end_event, do_yield=False):
|
|
step = 20
|
|
niters = 0
|
|
duration = 0.0
|
|
_time = time.time
|
|
_sleep = time.sleep
|
|
_func = self.func
|
|
_args = self.args
|
|
t1 = start_time
|
|
while True:
|
|
for i in range(step):
|
|
_func(*_args)
|
|
t2 = _time()
|
|
# If another thread terminated, the current measurement is invalid
|
|
# => return the previous one.
|
|
if end_event:
|
|
return niters, duration
|
|
niters += step
|
|
duration = t2 - start_time
|
|
if duration >= min_duration:
|
|
end_event.append(None)
|
|
return niters, duration
|
|
if t2 - t1 < 0.01:
|
|
# Minimize interference of measurement on overall runtime
|
|
step = step * 3 // 2
|
|
elif do_yield:
|
|
# OS scheduling of Python threads is sometimes so bad that we
|
|
# have to force thread switching ourselves, otherwise we get
|
|
# completely useless results.
|
|
_sleep(0.0001)
|
|
t1 = t2
|
|
|
|
|
|
def run_throughput_test(func, args, nthreads):
|
|
assert nthreads >= 1
|
|
|
|
# Warm up
|
|
func(*args)
|
|
|
|
results = []
|
|
loop = TimedLoop(func, args)
|
|
end_event = []
|
|
|
|
if nthreads == 1:
|
|
# Pure single-threaded performance, without any switching or
|
|
# synchronization overhead.
|
|
start_time = time.time()
|
|
results.append(loop(start_time, THROUGHPUT_DURATION,
|
|
end_event, do_yield=False))
|
|
return results
|
|
|
|
started = False
|
|
ready_cond = threading.Condition()
|
|
start_cond = threading.Condition()
|
|
ready = []
|
|
|
|
def run():
|
|
with ready_cond:
|
|
ready.append(None)
|
|
ready_cond.notify()
|
|
with start_cond:
|
|
while not started:
|
|
start_cond.wait()
|
|
results.append(loop(start_time, THROUGHPUT_DURATION,
|
|
end_event, do_yield=True))
|
|
|
|
threads = []
|
|
for i in range(nthreads):
|
|
threads.append(threading.Thread(target=run))
|
|
for t in threads:
|
|
t.setDaemon(True)
|
|
t.start()
|
|
# We don't want measurements to include thread startup overhead,
|
|
# so we arrange for timing to start after all threads are ready.
|
|
with ready_cond:
|
|
while len(ready) < nthreads:
|
|
ready_cond.wait()
|
|
with start_cond:
|
|
start_time = time.time()
|
|
started = True
|
|
start_cond.notify(nthreads)
|
|
for t in threads:
|
|
t.join()
|
|
|
|
return results
|
|
|
|
def run_throughput_tests(max_threads):
|
|
for task in throughput_tasks:
|
|
print(task.__doc__)
|
|
print()
|
|
func, args = task()
|
|
nthreads = 1
|
|
baseline_speed = None
|
|
while nthreads <= max_threads:
|
|
results = run_throughput_test(func, args, nthreads)
|
|
# Taking the max duration rather than average gives pessimistic
|
|
# results rather than optimistic.
|
|
speed = sum(r[0] for r in results) / max(r[1] for r in results)
|
|
print("threads=%d: %d" % (nthreads, speed), end="")
|
|
if baseline_speed is None:
|
|
print(" iterations/s.")
|
|
baseline_speed = speed
|
|
else:
|
|
print(" ( %d %%)" % (speed / baseline_speed * 100))
|
|
nthreads += 1
|
|
print()
|
|
|
|
|
|
LAT_END = "END"
|
|
|
|
def _sendto(sock, s, addr):
|
|
sock.sendto(s.encode('ascii'), addr)
|
|
|
|
def _recv(sock, n):
|
|
return sock.recv(n).decode('ascii')
|
|
|
|
def latency_client(addr, nb_pings, interval):
|
|
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
try:
|
|
_time = time.time
|
|
_sleep = time.sleep
|
|
def _ping():
|
|
_sendto(sock, "%r\n" % _time(), addr)
|
|
# The first ping signals the parent process that we are ready.
|
|
_ping()
|
|
# We give the parent a bit of time to notice.
|
|
_sleep(1.0)
|
|
for i in range(nb_pings):
|
|
_sleep(interval)
|
|
_ping()
|
|
_sendto(sock, LAT_END + "\n", addr)
|
|
finally:
|
|
sock.close()
|
|
|
|
def run_latency_client(**kwargs):
|
|
cmd_line = [sys.executable, '-E', os.path.abspath(__file__)]
|
|
cmd_line.extend(['--latclient', repr(kwargs)])
|
|
return subprocess.Popen(cmd_line) #, stdin=subprocess.PIPE,
|
|
#stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
|
|
|
|
def run_latency_test(func, args, nthreads):
|
|
# Create a listening socket to receive the pings. We use UDP which should
|
|
# be painlessly cross-platform.
|
|
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
sock.bind(("127.0.0.1", 0))
|
|
addr = sock.getsockname()
|
|
|
|
interval = LATENCY_PING_INTERVAL
|
|
duration = LATENCY_DURATION
|
|
nb_pings = int(duration / interval)
|
|
|
|
results = []
|
|
threads = []
|
|
end_event = []
|
|
start_cond = threading.Condition()
|
|
started = False
|
|
if nthreads > 0:
|
|
# Warm up
|
|
func(*args)
|
|
|
|
results = []
|
|
loop = TimedLoop(func, args)
|
|
ready = []
|
|
ready_cond = threading.Condition()
|
|
|
|
def run():
|
|
with ready_cond:
|
|
ready.append(None)
|
|
ready_cond.notify()
|
|
with start_cond:
|
|
while not started:
|
|
start_cond.wait()
|
|
loop(start_time, duration * 1.5, end_event, do_yield=False)
|
|
|
|
for i in range(nthreads):
|
|
threads.append(threading.Thread(target=run))
|
|
for t in threads:
|
|
t.setDaemon(True)
|
|
t.start()
|
|
# Wait for threads to be ready
|
|
with ready_cond:
|
|
while len(ready) < nthreads:
|
|
ready_cond.wait()
|
|
|
|
# Run the client and wait for the first ping(s) to arrive before
|
|
# unblocking the background threads.
|
|
chunks = []
|
|
process = run_latency_client(addr=sock.getsockname(),
|
|
nb_pings=nb_pings, interval=interval)
|
|
s = _recv(sock, 4096)
|
|
_time = time.time
|
|
|
|
with start_cond:
|
|
start_time = _time()
|
|
started = True
|
|
start_cond.notify(nthreads)
|
|
|
|
while LAT_END not in s:
|
|
s = _recv(sock, 4096)
|
|
t = _time()
|
|
chunks.append((t, s))
|
|
|
|
# Tell the background threads to stop.
|
|
end_event.append(None)
|
|
for t in threads:
|
|
t.join()
|
|
process.wait()
|
|
sock.close()
|
|
|
|
for recv_time, chunk in chunks:
|
|
# NOTE: it is assumed that a line sent by a client wasn't received
|
|
# in two chunks because the lines are very small.
|
|
for line in chunk.splitlines():
|
|
line = line.strip()
|
|
if line and line != LAT_END:
|
|
send_time = eval(line)
|
|
assert isinstance(send_time, float)
|
|
results.append((send_time, recv_time))
|
|
|
|
return results
|
|
|
|
def run_latency_tests(max_threads):
|
|
for task in latency_tasks:
|
|
print("Background CPU task:", task.__doc__)
|
|
print()
|
|
func, args = task()
|
|
nthreads = 0
|
|
while nthreads <= max_threads:
|
|
results = run_latency_test(func, args, nthreads)
|
|
n = len(results)
|
|
# We print out milliseconds
|
|
lats = [1000 * (t2 - t1) for (t1, t2) in results]
|
|
#print(list(map(int, lats)))
|
|
avg = sum(lats) / n
|
|
dev = (sum((x - avg) ** 2 for x in lats) / n) ** 0.5
|
|
print("CPU threads=%d: %d ms. (std dev: %d ms.)" % (nthreads, avg, dev), end="")
|
|
print()
|
|
#print(" [... from %d samples]" % n)
|
|
nthreads += 1
|
|
print()
|
|
|
|
|
|
BW_END = "END"
|
|
|
|
def bandwidth_client(addr, packet_size, duration):
|
|
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
sock.bind(("127.0.0.1", 0))
|
|
local_addr = sock.getsockname()
|
|
_time = time.time
|
|
_sleep = time.sleep
|
|
def _send_chunk(msg):
|
|
_sendto(sock, ("%r#%s\n" % (local_addr, msg)).rjust(packet_size), addr)
|
|
# We give the parent some time to be ready.
|
|
_sleep(1.0)
|
|
try:
|
|
start_time = _time()
|
|
end_time = start_time + duration * 2.0
|
|
i = 0
|
|
while _time() < end_time:
|
|
_send_chunk(str(i))
|
|
s = _recv(sock, packet_size)
|
|
assert len(s) == packet_size
|
|
i += 1
|
|
_send_chunk(BW_END)
|
|
finally:
|
|
sock.close()
|
|
|
|
def run_bandwidth_client(**kwargs):
|
|
cmd_line = [sys.executable, '-E', os.path.abspath(__file__)]
|
|
cmd_line.extend(['--bwclient', repr(kwargs)])
|
|
return subprocess.Popen(cmd_line) #, stdin=subprocess.PIPE,
|
|
#stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
|
|
|
|
def run_bandwidth_test(func, args, nthreads):
|
|
# Create a listening socket to receive the packets. We use UDP which should
|
|
# be painlessly cross-platform.
|
|
with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
|
|
sock.bind(("127.0.0.1", 0))
|
|
addr = sock.getsockname()
|
|
|
|
duration = BANDWIDTH_DURATION
|
|
packet_size = BANDWIDTH_PACKET_SIZE
|
|
|
|
results = []
|
|
threads = []
|
|
end_event = []
|
|
start_cond = threading.Condition()
|
|
started = False
|
|
if nthreads > 0:
|
|
# Warm up
|
|
func(*args)
|
|
|
|
results = []
|
|
loop = TimedLoop(func, args)
|
|
ready = []
|
|
ready_cond = threading.Condition()
|
|
|
|
def run():
|
|
with ready_cond:
|
|
ready.append(None)
|
|
ready_cond.notify()
|
|
with start_cond:
|
|
while not started:
|
|
start_cond.wait()
|
|
loop(start_time, duration * 1.5, end_event, do_yield=False)
|
|
|
|
for i in range(nthreads):
|
|
threads.append(threading.Thread(target=run))
|
|
for t in threads:
|
|
t.setDaemon(True)
|
|
t.start()
|
|
# Wait for threads to be ready
|
|
with ready_cond:
|
|
while len(ready) < nthreads:
|
|
ready_cond.wait()
|
|
|
|
# Run the client and wait for the first packet to arrive before
|
|
# unblocking the background threads.
|
|
process = run_bandwidth_client(addr=addr,
|
|
packet_size=packet_size,
|
|
duration=duration)
|
|
_time = time.time
|
|
# This will also wait for the parent to be ready
|
|
s = _recv(sock, packet_size)
|
|
remote_addr = eval(s.partition('#')[0])
|
|
|
|
with start_cond:
|
|
start_time = _time()
|
|
started = True
|
|
start_cond.notify(nthreads)
|
|
|
|
n = 0
|
|
first_time = None
|
|
while not end_event and BW_END not in s:
|
|
_sendto(sock, s, remote_addr)
|
|
s = _recv(sock, packet_size)
|
|
if first_time is None:
|
|
first_time = _time()
|
|
n += 1
|
|
end_time = _time()
|
|
|
|
end_event.append(None)
|
|
for t in threads:
|
|
t.join()
|
|
process.kill()
|
|
|
|
return (n - 1) / (end_time - first_time)
|
|
|
|
def run_bandwidth_tests(max_threads):
|
|
for task in bandwidth_tasks:
|
|
print("Background CPU task:", task.__doc__)
|
|
print()
|
|
func, args = task()
|
|
nthreads = 0
|
|
baseline_speed = None
|
|
while nthreads <= max_threads:
|
|
results = run_bandwidth_test(func, args, nthreads)
|
|
speed = results
|
|
#speed = len(results) * 1.0 / results[-1][0]
|
|
print("CPU threads=%d: %.1f" % (nthreads, speed), end="")
|
|
if baseline_speed is None:
|
|
print(" packets/s.")
|
|
baseline_speed = speed
|
|
else:
|
|
print(" ( %d %%)" % (speed / baseline_speed * 100))
|
|
nthreads += 1
|
|
print()
|
|
|
|
|
|
def main():
|
|
usage = "usage: %prog [-h|--help] [options]"
|
|
parser = OptionParser(usage=usage)
|
|
parser.add_option("-t", "--throughput",
|
|
action="store_true", dest="throughput", default=False,
|
|
help="run throughput tests")
|
|
parser.add_option("-l", "--latency",
|
|
action="store_true", dest="latency", default=False,
|
|
help="run latency tests")
|
|
parser.add_option("-b", "--bandwidth",
|
|
action="store_true", dest="bandwidth", default=False,
|
|
help="run I/O bandwidth tests")
|
|
parser.add_option("-i", "--interval",
|
|
action="store", type="int", dest="check_interval", default=None,
|
|
help="sys.setcheckinterval() value")
|
|
parser.add_option("-I", "--switch-interval",
|
|
action="store", type="float", dest="switch_interval", default=None,
|
|
help="sys.setswitchinterval() value")
|
|
parser.add_option("-n", "--num-threads",
|
|
action="store", type="int", dest="nthreads", default=4,
|
|
help="max number of threads in tests")
|
|
|
|
# Hidden option to run the pinging and bandwidth clients
|
|
parser.add_option("", "--latclient",
|
|
action="store", dest="latclient", default=None,
|
|
help=SUPPRESS_HELP)
|
|
parser.add_option("", "--bwclient",
|
|
action="store", dest="bwclient", default=None,
|
|
help=SUPPRESS_HELP)
|
|
|
|
options, args = parser.parse_args()
|
|
if args:
|
|
parser.error("unexpected arguments")
|
|
|
|
if options.latclient:
|
|
kwargs = eval(options.latclient)
|
|
latency_client(**kwargs)
|
|
return
|
|
|
|
if options.bwclient:
|
|
kwargs = eval(options.bwclient)
|
|
bandwidth_client(**kwargs)
|
|
return
|
|
|
|
if not options.throughput and not options.latency and not options.bandwidth:
|
|
options.throughput = options.latency = options.bandwidth = True
|
|
if options.check_interval:
|
|
sys.setcheckinterval(options.check_interval)
|
|
if options.switch_interval:
|
|
sys.setswitchinterval(options.switch_interval)
|
|
|
|
print("== %s %s (%s) ==" % (
|
|
platform.python_implementation(),
|
|
platform.python_version(),
|
|
platform.python_build()[0],
|
|
))
|
|
# Processor identification often has repeated spaces
|
|
cpu = ' '.join(platform.processor().split())
|
|
print("== %s %s on '%s' ==" % (
|
|
platform.machine(),
|
|
platform.system(),
|
|
cpu,
|
|
))
|
|
print()
|
|
|
|
if options.throughput:
|
|
print("--- Throughput ---")
|
|
print()
|
|
run_throughput_tests(options.nthreads)
|
|
|
|
if options.latency:
|
|
print("--- Latency ---")
|
|
print()
|
|
run_latency_tests(options.nthreads)
|
|
|
|
if options.bandwidth:
|
|
print("--- I/O bandwidth ---")
|
|
print()
|
|
run_bandwidth_tests(options.nthreads)
|
|
|
|
if __name__ == "__main__":
|
|
main()
|