linux下ssd电子盘速度检测

代码：

#include<stdio.h>
#include<sys/time.h>
#include <fcntl.h>
#include <pthread.h>  

unsigned char pbuffer[1024*1024*8];//共用缓冲
void testssd1(int *ch )//写测试
{
    int i=0;
    int fd;
        if(*ch==0)
               fd = open("/ssd1/test.dat", O_RDWR|O_CREAT);
	if(*ch==1)
		fd = open("/ssd2/test.dat", O_RDWR|O_CREAT);
	if(*ch==2)
		fd = open("/ssd3/test.dat", O_RDWR|O_CREAT);
	if(*ch==3)
		fd = open("/ssd4/test.dat", O_RDWR|O_CREAT);
	if(*ch==4)
		fd = open("/ssd5/test.dat", O_RDWR|O_CREAT);
	if(*ch==5)
		fd = open("/ssd6/test.dat", O_RDWR|O_CREAT);
	if(*ch==6)
		fd = open("/ssd7/test.dat", O_RDWR|O_CREAT);
	if(*ch==7)
		fd = open("/ssd8/test.dat", O_RDWR|O_CREAT);

    if(fd<0)
    {
        printf("%d open error!\n",*ch);
        return ;
    }

    for(i=0;i<32;i++)
        write(fd,pbuffer,1024*1024*8);//每次8M，共计256MB

    close(fd);
    printf("SSD%d test over!\n",*ch);
    return ;
}

void testssd2(int *ch )//读测试
{
    int i=0;
    int fd;
        if(*ch==0)
               fd = open("/ssd1/test.dat", O_RDWR|O_CREAT);
    if(*ch==1)
        fd = open("/ssd2/test.dat", O_RDWR|O_CREAT);
    if(*ch==2)
        fd = open("/ssd3/test.dat", O_RDWR|O_CREAT);
    if(*ch==3)
        fd = open("/ssd4/test.dat", O_RDWR|O_CREAT);
    if(*ch==4)
        fd = open("/ssd5/test.dat", O_RDWR|O_CREAT);
    if(*ch==5)
        fd = open("/ssd6/test.dat", O_RDWR|O_CREAT);
    if(*ch==6)
        fd = open("/ssd7/test.dat", O_RDWR|O_CREAT);
    if(*ch==7)
        fd = open("/ssd8/test.dat", O_RDWR|O_CREAT);

    if(fd<0)
    {
        printf("%d open error!\n",*ch);
        return ;
    }

    for(i=0;i<32;i++)
        read(fd,pbuffer,1024*1024*8);

    close(fd);
    printf("SSD%d test over!\n",*ch);
    return ;
}

int main()
{
    printf("this is SSD Speed test begin!\n\n");
    pthread_t _id[8];
    int ret,i,ch[8];
    struct  timeval  start;
    struct  timeval  end;
        float speed;

    for(i=0;i<1024*1024*8;i++)//初始化缓冲区
        pbuffer[i] = i&0xff;

    gettimeofday(&start,NULL);//开始计时------------
    for(i=0;i<8;i++)
    {
            ch[i] = i;//启动8个线程
	    ret=pthread_create(_id+i,NULL,(void *)testssd1,ch+i);
	    if(ret!=0)
	    {
		printf("Create pthread error!\n");
		return -1;
	    }
     }
    pthread_join(_id[0],NULL);  //等待各自到线程结束
    pthread_join(_id[1],NULL);
    pthread_join(_id[2],NULL);
    pthread_join(_id[3],NULL);
    pthread_join(_id[4],NULL);
    pthread_join(_id[5],NULL);
    pthread_join(_id[6],NULL);
    pthread_join(_id[7],NULL);  

    gettimeofday(&end, NULL);//停止计时-------------
    speed  = 1.0*(end.tv_sec-start.tv_sec)+(end.tv_usec-start.tv_usec)/1000000.0;//时间
    printf("ssd write speed:%6.5fMB/S(%6.5fsec)\n",256.0*8/speed,speed);         //速度

    printf("this is SSD Speed test  over!\n\n");
    return 0;
}

写测试运行结果：

# ./test
#  gcc ssd_test.c -o test  -lpthread
# ./test
SSD Speed test begin!

SSD4 test over!
SSD0 test over!
SSD6 test over!
SSD1 test over!
SSD5 test over!
SSD7 test over!
SSD2 test over!
SSD3 test over!
ssd write speed:1563.73594MB/S(1.30968sec)
SSD Speed test  over!

读测试运行结果：

# ./test
SSD Speed test begin!

SSD1 test over!
SSD7 test over!
SSD3 test over!
SSD2 test over!
SSD4 test over!
SSD5 test over!
SSD6 test over!
SSD0 test over!
ssd read speed:2315.16042MB/S(0.34623sec)
SSD Speed test  over!