求一段 Python 一代让 os x cpu 占用率飙升起来

[pinkman]

刚换了个风扇，想让cpu占用率升起来好看看新风扇转不...

[spoony]

挽尊，Chrome开起来去优酷播一段720P就行。

[pinkman]

@spoony 现在没有网，那待会儿回家去试试 :)

[tabris17]

下个super pi啊

[20150517]

开flash.......

[20150517]

哦对了,是在被窝里看1080P的flash,那个飙的叫爽啊,冬天直接可以当电热毯用了

[ChanneW]

Python 要开对应核数的进程才能跑到 100%

[zhjits]

smcFanControl 装好往 5000 转拉就行

[pinkman]

@zhjits 装好了，啦到了6500还是没有转呢？显示的温度是37

[binux]

cat /dev/urandom > /dev/null

[pinkman]

估计我这风扇是没有装好，现在用chrome开了4个超清视频爱奇艺、搜狐、youku、土豆，smcfancontrol显示温度71度，activity monitor中光是chrome helper的cpu占用率就是147%(这数怎么来的？会超过100%？），但风扇还是没有转...

[uniquecolesmith]

是用于给妹纸取暖？哈哈

[pinkman]

@binux 这段代码干什么的，果真有效，但也证明了风扇没有装好...

[zhjits]

@pinkman 那软件在有些机型（比如我的）上有问题，不能拉到 6500，5000 左右才行……

[bellchu]

Popen.wait()
Wait for child process to terminate. Set and return returncode attribute.

Warning This will deadlock when using stdout=PIPE and/or stderr=PIPE and the child process generates enough output to a pipe such that it blocks waiting for the OS pipe buffer to accept more data. Use communicate() to avoid that.

[ynyounuo]

@pinkman
Geekbench 一下就好了

[gaocegege]

#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

#define NUM_OF_CORES 8
#define MAX_PRIME 100000

void do_primes()
{
unsigned long i, num, primes = 0;
for (num = 1; num <= MAX_PRIME; ++num) {
for (i = 2; (i <= num) && (num % i != 0); ++i);
if (i == num)
++primes;
}
printf("Calculated %d primes.\n", primes);
}

int main(int argc, char ** argv)
{
time_t start, end;
time_t run_time;
unsigned long i;
pid_t pids[NUM_OF_CORES];

/* start of test */
start = time(NULL);
for (i = 0; i < NUM_OF_CORES; ++i) {
if (!(pids[i] = fork())) {
do_primes();
exit(0);
}
if (pids[i] < 0) {
perror("Fork");
exit(1);
}
}
for (i = 0; i < NUM_OF_CORES; ++i) {
waitpid(pids[i], NULL, 0);
}
end = time(NULL);
run_time = (end - start);
printf("This machine calculated all prime numbers under %d %d times "
"in %d seconds\n", MAX_PRIME, NUM_OF_CORES, run_time);
return 0;
}


From http://stackoverflow.com/a/9244508/4358533

[GeekGao]

import multiprocessing

def fuck_cpus():
while True:
print 'Fucking...'

CPU_CORE = 4
for i in xrange(CPU_CORE):
multiprocessing.Process(target=fuck_cpus, args=()).start()

[GeekGao]

shit ,缩进呢。。。