最低CPU利用率,最高CPU利用率,初始线程数量,每次调节的线程数量,每个线程睡眠的时间(毫秒)
import time
import os
import string
import sys
class ControlThread(threading.Thread):
threading.Thread.__init__(self)
self.runflag = True #线程运行标示,用于将来减少线程时能够正常结束
while self.runflag:
os.popen('usleep ' + sys.argv[5])
#time.sleep(string.atof(sys.argv[5]))
#这里使用的是linux下shell里面的usleep,而不是python自带的sleep函数。
#相比之下,usleep还是相当强大的,而python的sleep单位为秒,虽然可以输入浮点数,但还是相对弱了些
self.runflag = False
#让其正常终止循环
threadList=[]
for i in range(0,string.atoi(sys.argv[3])):
thread = ControlThread()
threadList.append(thread)
thread.start()
while True:
output = 100 - string.atof(os.popen('sar 1 1 | grep ^Average | awk \'{print $8}\'').read())
print 'CPU Usage:' + str(output) + '\tCurrent Thread Number:' + str(len(threadList))
for i in range(0,string.atoi(sys.argv[4])):
thread = ControlThread()
thread.start()
threadList.append(thread)
print "+++++"
if output > string.atoi(sys.argv[2]):#减少线程
for i in range(0,string.atoi(sys.argv[4])):
thread = threadList.pop()
thread.stop()
print "-----"