#!/usr/bin/python

import subprocess
import random
import math

def kernel_scale (rtime, total, stime):
	p = subprocess.Popen("./scale_stime " + str(rtime) + " " + str(total) + " " + str(stime) , shell=True, stdout=subprocess.PIPE)
	return int(p.stdout.read())

def python_scale (rtime, total, stime):
	return (stime * rtime) / total

max_rtime = 10*4096*364*24*60*60*1000;  # 10 years for 4096 threads

fail=False
K=1000
for i in range(0, K):
	rtime = random.randrange(max_rtime)
	total = int(random.uniform(0.1, 1.9) * rtime)

	for n in range(1, 100):
		stime = (n * total / 100)
		r1 = kernel_scale(rtime, total, stime)
		r2 = python_scale(rtime, total, stime)
		if (float(abs(r1 - r2)) / float(r2)) > 0.0005:
			print "FAIL!"
			print "rtime: " + str(rtime)
			print "total: " + str(total)
			print "stime: " + str(stime)
			print "kernel: " + str(r1)
			print "python: " + str(r2)

			fail=True
			break
	if fail:
		break;
	if (i % 100) == 99:
		print str(i/100) + "/" + str(K/100) + " OK"