performance measurements

Each table row shows performance measurements for this Python dev program with a particular command-line input value N.

 N  CPU secs Elapsed secs Memory KB Code B ≈ CPU Load
5,000,00026.2920.2013,240448  27% 23% 27% 41%
5,000,00026.5620.3213,164448  25% 28% 35% 38%
5,000,00026.1619.9213,012448  24% 31% 30% 34%

Read the ↓ make, command line, and program output logs to see how this program was run.

Read thread-ring benchmark to see what this program should do.

 notes

 thread-ring Python dev #2 program source code

# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org/
# Contributed by Antti Kervinen
# Modified by Tupteq
# 2to3

import sys
import _thread

# Set minimum stack size for threads, otherwise the program may fail
# to create such a many threads
_thread.stack_size(32*1024)

def threadfun(number, lock_acquire, next_release):
    global n
    while 1:
        lock_acquire()
        if n > 0:
            n -= 1
            next_release()
        else:
            print(number)
            main_lock.release()

# main
n = int(sys.argv[1])
main_lock = _thread.allocate_lock()
main_lock.acquire()

first_lock = _thread.allocate_lock()
next_lock = first_lock

for number in range(503):
    lock = next_lock
    lock.acquire()
    next_lock = _thread.allocate_lock() if number < 502 else first_lock
    _thread.start_new_thread(threadfun,
        (number+1, lock.acquire, next_lock.release))

first_lock.release()
main_lock.acquire()

 make, command-line, and program output logs

Wed, 12 Sep 2018 09:25:51 GMT

COMMAND LINE:
/usr/bin/python3.7 threadring.python-dev-2.python-dev 5000000

PROGRAM OUTPUT:
181

Revised BSD license

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