def main(libc_name, n):
import time
from threading import Thread
from _ffi import CDLL, types
#
libc = CDLL(libc_name)
sleep = libc.getfunc('sleep', [types.uint], types.uint)
delays = [0] * n + [1]
#
def loop_of_sleeps(i, delays):
for delay in delays:
sleep(delay) # ID: sleep
#
threads = [
Thread(target=loop_of_sleeps, args=[i, delays])
for i in range(5)
]
start = time.time()
for i, thread in enumerate(threads):
thread.start()
for thread in threads:
thread.join()
end = time.time()
return end - start
def main(libm_name):
try:
from _ffi import CDLL, types
except ImportError:
sys.stderr.write('SKIP: cannot import _ffi\n')
return 0
libm = CDLL(libm_name)
pow = libm.getfunc('pow', [types.double, types.double],
types.double)
i = 0
res = 0
while i < 300:
tmp = pow(2, 3) # ID: fficall
res += tmp
i += 1
return pow.getaddr(), res
def main(libc_name, n):
import time
from threading import Thread
from _ffi import CDLL, types
#
libc = CDLL(libc_name)
sleep = libc.getfunc('sleep', [types.uint], types.uint)
delays = [0]*n + [1]
#
def loop_of_sleeps(i, delays):
for delay in delays:
sleep(delay) # ID: sleep
#
threads = [Thread(target=loop_of_sleeps, args=[i, delays]) for i in range(5)]
start = time.time()
for i, thread in enumerate(threads):
thread.start()
for thread in threads:
thread.join()
end = time.time()
return end - start
