sched.py

#!/usr/bin/python3

import sys
import time
import os

NLOOP=100000

if len(sys.argv) < 2:
    print("使い方: {} <nproc>".format(sys.argv[0]))
    exit(1)

nproc = int(sys.argv[1])

if nproc < 1:
    print("nprocは1以上の整数にしてください: {}".format(nproc))

start = time.perf_counter()

def child_fn(n):
    progress = 100*[None]
    for i in range(100):
        for j in range(NLOOP):
            continue
        progress[i] = time.perf_counter()
    f = open("{}.txt".format(n),"w")
    for i in range(100):
        f.write("{}\t{}\n".format(progress[i]-start,i))
    f.close()
    exit(0)

for i in range(nproc):
    pid = os.fork()
    if (pid < 0):
        exit(1)
    elif pid == 0:
        child_fn(i)

for i in range(nproc):
    os.wait()