编程之美-1.1 CPU 曲线

解法二：

import time

def cpu_curve():

    busyTime = 50 # 50 ms的效果比10ms的效果要好

    idleTime = busyTime

    startTime = 0

    i = 0

    while True:

        startTime = time.time()*1000  # 得到毫秒级的时间戳

        while time.time()*1000 - startTime <= busyTime:

            i += 1

        time.sleep(busyTime/1000)

cpu_curve()

解法四：

import time

from math import sin

PI = 3.14159265

COUNT = 200 # 用200个点拟合一个周期内的曲线

SPLIT = 2*PI/COUNT # 每个点相隔距离

SIZE = 0.5

OFFSET = 0.5 # SIZE 和 OFFSET将sin(x)的值域转化为[0, 1](可以表示cpu工作时间和休息时间的时间比)

INTERVAL = 100 # 一个点占用的时间为100ms, 100ms比50ms的曲线更加平滑

def SinCurve():

    busySpan = [0 for i in range(COUNT)]

    idleSpan = [0 for i in range(COUNT)]

    radian = 0.0

    for i in range(COUNT):

        proportion = sin(radian)*SIZE + OFFSET

        busySpan[i] = INTERVAL * proportion

        idleSpan[i] = INTERVAL - busySpan[i]

        radian += SPLIT

    startTime = 0

    j = 0

    i = 0

    while True:

        j = j % COUNT

        startTime = time.time() * 1000

        while time.time()*1000 - startTime <= busySpan[j]:

            i += 1

        time.sleep(idleSpan[j]/1000);

        j+=1

SinCurve()

编程之美-1.1 CPU 曲线的相关教程结束。