测试一下golang协程资源占有率

摘要: golang 协程资源占有

GO版本：go version go1.4.2 linux/amd64

测试环境：

[root@localhost mpro]# more /proc/cpuinfo | grep "model name"model name      : Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz
model name      : Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz
model name      : Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz
model name      : Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz
[root@localhost mpro]# [root@localhost mpro]# grep MemTotal /proc/meminfoMemTotal:        3868776 kB
[root@localhost mpro]# getconf LONG_BIT64[root@localhost mpro]# more /etc/redhat-releaseCentOS Linux release 7.1.1503 (Core)

测试用例：

package main
import (	"time")
func main() {	for i := 0; i < 200000; i++ {		go func() {			time.Sleep(5 * time.Second)		}()	}
	time.Sleep(10 * time.Second)}

执行程序前：

top - 18:53:19 up 19 min,  3 users,  load average: 0.00, 0.04, 0.11Tasks: 522 total,   1 running, 521 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.1 us,  0.2 sy,  0.0 ni, 99.6 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem :  3868776 total,  3327732 free,   235764 used,   305280 buff/cache
KiB Swap:  2097148 total,  2097148 free,        0 used.  3397344 avail Mem

执行程序后：

top - 18:53:37 up 19 min,  3 users,  load average: 0.00, 0.04, 0.11Tasks: 524 total,   1 running, 523 sleeping,   0 stopped,   0 zombie
%Cpu(s):  1.2 us, 10.6 sy,  0.0 ni, 88.2 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem :  3868776 total,  2793732 free,   752512 used,   322532 buff/cache
KiB Swap:  2097148 total,  2097148 free,        0 used.  2880016 avail Mem

总结：20万个协程占用了500M内存 50万KB

平均一个协程占用2.5KB