performance measurements

Each table row shows performance measurements for this Python 3 program with a particular command-line input value N.

 N  CPU secs Elapsed secs Memory KB Code B ≈ CPU Load
500,0002.172.179,852288  0% 1% 0% 100%
5,000,00020.4920.519,852288  1% 1% 0% 100%
50,000,000205.35205.489,844288  1% 1% 0% 100%

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

Python 3.4.3 (default, Apr 4 2015, 09:21:43) [GCC 4.8.2] on linux

 thread-ring Python 3 #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

Sun, 05 Apr 2015 02:37:09 GMT

MAKE:
mv threadring.python3-2.python3 threadring.python3-2.py
/usr/local/src/Python-3.4.3/bin/python3.4 -OO -c "from py_compile import compile; compile('threadring.python3-2.py')"
0.05s to complete and log all make actions

COMMAND LINE:
/usr/local/src/Python-3.4.3/bin/python3.4 threadring.python3-2.py 50000000

PROGRAM OUTPUT:
292

Revised BSD license

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