2019-2020-1 20175301 20175305 20175318 实验三 实时系统
2019-2020-1 20175301 20175305 20175318 实验三 实时系统
一 . 实验目的
1.掌握并发程序操作实现
2.学会比较不同进程的优缺点
二 . 实验仪器
嵌入式实验平台UP-TECH S24101
三 . 实验内容
1. 实验三-并发程序-1
学习使用Linux命令wc(1)
基于Linux Socket程序设计实现wc（1）服务器(端口号是你学号的后6位)和客户端
客户端传一个文本文件给服务器
服务器返加文本文件中的单词数
实验代码
server
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#define MYPORT 175301
void main(){
int clientfd;
struct sockaddr_in remote_addr;
char buffer[BUFSIZ];
memset(&remote_addr, 0 , sizeof(remote_addr));
remote_addr.sin_family=AF_INET;
remote_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
remote_addr.sin_port=htons(MYPORT);
if((clientfd=socket(PF_INET,SOCK_STREAM,0))<0){
perror("socket");
}
if(connect(clientfd, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr))<0){
perror("connect");
}
int len;
FILE *fp;
char path[20];
gets(path);
fp=fopen(path, "r");
char readch;
int i=0;
while((readch=fgetc(fp))!=EOF){
if(i<1024){
buffer[i]=readch;
i++;
}
else{
i=0;
int n=send(clientfd, buffer, 1024, 0);
}
}
fclose(fp);
if(i!=0)
send(clientfd, buffer, i, 0);
long wordscount;
recv(clientfd, &wordscount, sizeof(long), 0);
printf("%ld\n", wordscount);
close(clientfd);
}
client
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <pthread.h>
#define MYPORT 175301
pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;
int serverfd, clientfd;
char buffer[BUFSIZ];
void *wc(void *m){
pthread_mutex_lock( &counter_mutex );
int len, i;
long wordscount=0;
int flag=1;
while(1){
if((len=recv(clientfd, buffer, 1024, 0))>0){
for(i=0; i<len; i++){
if(flag==0){
switch(buffer[i]){
case ' ':
wordscount++;
break;
case '\n':
wordscount++;
break;
case '\r':
wordscount++;
break;
default:
break;
}
}
if(buffer[i]== ' ' || buffer[i]=='\n' || buffer[i]=='\r')
flag=1;
else
flag=0;
}
}
if(len<1024)
break;
}
send(clientfd, &wordscount, sizeof(long), 0);
close(clientfd);
pthread_mutex_unlock( &counter_mutex );
return NULL;
}
void main(){
pthread_t t;
char arg[30];
struct sockaddr_in my_addr;
struct sockaddr_in remote_addr;
memset(&my_addr, 0, sizeof(my_addr));
my_addr.sin_family=AF_INET;
my_addr.sin_addr.s_addr=INADDR_ANY;
my_addr.sin_port=htons(MYPORT);
if((serverfd=socket(PF_INET, SOCK_STREAM, 0))==-1){
perror("socket");
}
if(bind(serverfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))<0){
perror("bind");
}
listen(serverfd, 5);
int addrlen=sizeof(struct sockaddr_in);
while(1){
if((clientfd=accept(serverfd, (struct sockaddr *)&remote_addr, &addrlen))<0){
perror("accept");
}
}
实验截图
2. 实验三-并发程序-2
使用多线程实现wc服务器并使用同步互斥机制保证计数正确
上方提交代码
下方提交测试
对比单线程版本的性能，并分析原因
实验代码
server
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#define MYPORT 175301
void main(){
int clientfd;
struct sockaddr_in remote_addr;
char buffer[BUFSIZ];
memset(&remote_addr, 0 , sizeof(remote_addr));
remote_addr.sin_family=AF_INET;
remote_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
remote_addr.sin_port=htons(MYPORT);
if((clientfd=socket(PF_INET,SOCK_STREAM,0))<0){
perror("socket");
}
if(connect(clientfd, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr))<0){
perror("connect");
}
int len;
FILE *fp;
char path[20];
gets(path);
fp=fopen(path, "r");
char readch;
int i=0;
while((readch=fgetc(fp))!=EOF){
if(i<1024){
buffer[i]=readch;
i++;
}
else{
i=0;
int n=send(clientfd, buffer, 1024, 0);
}
}
fclose(fp);
if(i!=0)
send(clientfd, buffer, i, 0);
long wordscount;
recv(clientfd, &wordscount, sizeof(long), 0);
printf("%ld\n", wordscount);
close(clientfd);
}
client
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <pthread.h>
#define MYPORT 175301
pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;
int serverfd, clientfd;
char buffer[BUFSIZ];
void *wc(void *m){
pthread_mutex_lock( &counter_mutex );
int len, i;
long wordscount=0;
int flag=1;
while(1){
if((len=recv(clientfd, buffer, 1024, 0))>0){
for(i=0; i<len; i++){
if(flag==0){
switch(buffer[i]){
case ' ':
wordscount++;
break;
case '\n':
wordscount++;
break;
case '\r':
wordscount++;
break;
default:
break;
}
}
if(buffer[i]== ' ' || buffer[i]=='\n' || buffer[i]=='\r')
flag=1;
else
flag=0;
}
}
if(len<1024)
break;
}
send(clientfd, &wordscount, sizeof(long), 0);
close(clientfd);
pthread_mutex_unlock( &counter_mutex );
return NULL;
}
void main(){
pthread_t t;
char arg[30];
struct sockaddr_in my_addr;
struct sockaddr_in remote_addr;
memset(&my_addr, 0, sizeof(my_addr));
my_addr.sin_family=AF_INET;
my_addr.sin_addr.s_addr=INADDR_ANY;
my_addr.sin_port=htons(MYPORT);
if((serverfd=socket(PF_INET, SOCK_STREAM, 0))==-1){
perror("socket");
}
if(bind(serverfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))<0){
perror("bind");
}
listen(serverfd, 5);
int addrlen=sizeof(struct sockaddr_in);
while(1){
if((clientfd=accept(serverfd, (struct sockaddr *)&remote_addr, &addrlen))<0){
perror("accept");
}
}
实验截图
3. 实验三-并发程序-3
交叉编译多线程版本服务器并部署到实验箱中
PC机作客户端测试wc服务器
提交测试截图
实验代码
server
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#define MYPORT 175301
void main(){
int clientfd;
struct sockaddr_in remote_addr;
char buffer[BUFSIZ];
memset(&remote_addr, 0 , sizeof(remote_addr));
remote_addr.sin_family=AF_INET;
remote_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
remote_addr.sin_port=htons(MYPORT);
if((clientfd=socket(PF_INET,SOCK_STREAM,0))<0){
perror("socket");
}
if(connect(clientfd, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr))<0){
perror("connect");
}
int len;
FILE *fp;
char path[20];
gets(path);
fp=fopen(path, "r");
char readch;
int i=0;
while((readch=fgetc(fp))!=EOF){
if(i<1024){
buffer[i]=readch;
i++;
}
else{
i=0;
int n=send(clientfd, buffer, 1024, 0);
}
}
fclose(fp);
if(i!=0)
send(clientfd, buffer, i, 0);
long wordscount;
recv(clientfd, &wordscount, sizeof(long), 0);
printf("%ld\n", wordscount);
close(clientfd);
}
client
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <pthread.h>
#define MYPORT 175301
pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;
int serverfd, clientfd;
char buffer[BUFSIZ];
void *wc(void *m){
pthread_mutex_lock( &counter_mutex );
int len, i;
long wordscount=0;
int flag=1;
while(1){
if((len=recv(clientfd, buffer, 1024, 0))>0){
for(i=0; i<len; i++){
if(flag==0){
switch(buffer[i]){
case ' ':
wordscount++;
break;
case '\n':
wordscount++;
break;
case '\r':
wordscount++;
break;
default:
break;
}
}
if(buffer[i]== ' ' || buffer[i]=='\n' || buffer[i]=='\r')
flag=1;
else
flag=0;
}
}
if(len<1024)
break;
}
send(clientfd, &wordscount, sizeof(long), 0);
close(clientfd);
pthread_mutex_unlock( &counter_mutex );
return NULL;
}
void main(){
pthread_t t;
char arg[30];
struct sockaddr_in my_addr;
struct sockaddr_in remote_addr;
memset(&my_addr, 0, sizeof(my_addr));
my_addr.sin_family=AF_INET;
my_addr.sin_addr.s_addr=INADDR_ANY;
my_addr.sin_port=htons(MYPORT);
if((serverfd=socket(PF_INET, SOCK_STREAM, 0))==-1){
perror("socket");
}
if(bind(serverfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))<0){
perror("bind");
}
listen(serverfd, 5);
int addrlen=sizeof(struct sockaddr_in);
while(1){
if((clientfd=accept(serverfd, (struct sockaddr *)&remote_addr, &addrlen))<0){
perror("accept");
}
}
