简单测试一下go(golang) 和libtask 协程的切换效率

简单测试一下go(golang)和libtask协程的切换效率, libtask一个C语言的协程库,是go语言的前身很早期的原型,
测试机器是我的mac air 安装的centos虚拟机(只有一个核)
代码没有采用任何优化,只是使用默认配置

测试结论:
golang 切换100w次 需要 295ms
libtask 切换100w次 需要1446ms


package main
import (
"fmt"
"runtime"
"time"
)


var i int = 0

func test(){

for{
i++
if i >1000000{
fmt.Printf("end switch \n")
break
}else{
//fmt.Printf(" in test i:%d \n", i)
}
runtime.Gosched()

}

}

func main(){

fmt.Printf("GOMAXPROCS :%d \n",runtime.GOMAXPROCS(1))
tv1 := time.Now().UnixNano()

go test()

// in main goroutine
test()

tv2 := time.Now().UnixNano()

usetime := (tv2 - tv1)/1000000
fmt.Printf("use time: %dms \n", usetime)
fmt.Printf("end main \n")


}

lib task测试代码:

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <task.h>
#include<sys/time.h>

extern int tasknswitch;

enum { STACK = 32768 };
int i = 0;
struct timeval tv1, tv2;

void
testswitch(void *v)
{

int ms;

while(1)
{
i++;
if( i< 1000000)
{

//printf("int task i:%d \n", i);
taskyield();
}
else
{
// chansendul(c, 0);
//taskexitall(0);
gettimeofday(&tv2,NULL);
ms = ((tv2.tv_sec - tv1.tv_sec)*1000000 + (tv2.tv_usec - tv1.tv_usec))/1000;
printf("time use %d\n ", ms);
printf("task swithch %d \n", tasknswitch);

taskexitall(0);
}
}
}



void
taskmain(int argc, char **argv)
{

int n;
//c = chancreate(sizeof(unsigned long), 0);
gettimeofday(&tv1, NULL);
//for(i=1; i<; i++){
taskcreate(testswitch, 0, STACK);
//}
testswitch(NULL);

}

转载请注明出处,谢谢。。