1，摘要：测试send和sendmsg的性能，影响这两个函数性能主要有发送的字节大小，增加循环次数，从100到10000000（千万）
2，基本信息
cat /proc/cpuinfo查看CPU信息，如下：
Intel(R) Xeon(R) CPU E5-2698 v3 @ 2.30GHz
cat /proc/version 查看操作系统内核版本，如下：
Linux version 3.10.0-327.el7.x86_64
cat /proc/meminfo查看内存信息，如下：
MemTotal: 131748016 kB
MemFree: 42526620 kB
MemAvailable: 60623924 kB
3，send性能测试
服务器端 ： nc -lu 8888
客服端：
#include <stdio.h> #include <stdlib.h> #include <errno.h> #include <string.h> #include <netdb.h> #include <sys/types.h> #include <netinet/in.h> #include <sys/socket.h> #include <arpa/inet.h> #include<time.h> #include <sys/times.h> #include <unistd.h> //#define BUFSIZ 1024 #define recycle 1000000 static inline uint64_t rte_rdtsc(void) { union { uint64_t tsc_64; struct { uint32_t lo_32; uint32_t hi_32; }; }tsc; asm volatile("rdtsc": "=a" (tsc.lo_32), "=d" (tsc.hi_32)); return tsc.tsc_64; } int recycleSet[]={100,500,1000,5000,10000,50000,100000,500000,1000000,5000000,10000000}; int bufsizeSet[]={128,256,512,1024,2048,3072,4096}; int main(int argc,char *argv[]) { /*if(argc<3) { printf("paramaters error! ./socet_sendmsg 1000 1024"); return -1; } int recycle_times=atoi(argv[1]); int buf_len=atoi(argv[2]); */ int sockfd,numbytes; //char buf[BUFSIZ]; int sc_clk_tck; sc_clk_tck = sysconf(_SC_CLK_TCK); sc_clk_tck = sysconf(_SC_CLK_TCK); struct sockaddr_in their_addr; //printf("break! sc_clk_tck=%d ",sc_clk_tck); while((sockfd = socket(AF_INET,SOCK_DGRAM,0)) == -1); //printf("We get the sockfd~ "); their_addr.sin_family = AF_INET; their_addr.sin_port = htons(8888); their_addr.sin_addr.s_addr=inet_addr("192.168.10.8"); bzero(&(their_addr.sin_zero), 8); while(connect(sockfd,(struct sockaddr*)&their_addr,sizeof(struct sockaddr)) == -1); // printf("Get the Server~Cheers! "); 濉濞绔�俊姣 // numbytes = recv(sockfd, buf, BUFSIZ,0);//妤娑? // buf[numbytes]=' '; // printf("%s",buf); //clock_t start_time,end_time; // start_time=clock(); int buf_i=0; for(buf_i=0;buf_i<7;buf_i++){ int buf_len=bufsizeSet[buf_i]; char *buf=(char *)calloc(buf_len,sizeof(char)); int i=0; for(i=0;i<buf_len;i++) { buf[i]='a' + rand()%26; } buf[buf_len]=' '; int recycle_i=0; for(recycle_i=0;recycle_i<11;recycle_i++){ int recycle_times=recycleSet[recycle_i]; struct timeval start_time,end_time; gettimeofday(&start_time,NULL); uint64_t start=rte_rdtsc(); for(i=0;i<recycle_times;i++) { numbytes = send(sockfd, buf, strlen(buf), 0); //numbytes=recv(sockfd,buf,BUFSIZ,0); //buf[numbytes]=' '; //printf("send:%d ",numbytes); } uint64_t end=rte_rdtsc(); //end_time=clock(); gettimeofday(&end_time,NULL); uint64_t duration=end-start; double duration_time=1000000*(end_time.tv_sec-start_time.tv_sec)+(end_time.tv_usec-start_time.tv_usec); //printf("recycle_times=%d duration=%f numbytes=%d duration_rte=%f ",recycle_times,duration_time,numbytes,duration/2.2); printf("%d,%d,%d, %f ,%f,%f ",recycle_times,numbytes,buf_len,duration_time,duration/2.2,duration_time*1.0/recycle_times); } } close(sockfd); return 0; }
4，sendmsg性能测试（iovlen=1）
服务器端：
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
/************************************************************************************************************************
*************************************************************************************************************************/
int main(int argc, char *argv[])
{
int fd, new_fd, struct_len, numbytes,i;
struct sockaddr_in server_addr;
struct sockaddr_in client_addr;
char buff[BUFSIZ];
//struct msghdr msg;
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(8888);
server_addr.sin_addr.s_addr = INADDR_ANY;
// bzero(&(server_addr.sin_zero), 8);
struct_len = sizeof(struct sockaddr_in);
while((fd = socket(AF_INET,SOCK_DGRAM,0)) == -1);
if (bind(fd, (struct sockaddr*)(&server_addr), struct_len) < 0)
{
fprintf(stderr, "bind fail
");
exit(EXIT_FAILURE);
}
printf("Bind Success!
");
// fd = socket(AF_INET, SOCK_DGRAM, 0);
/*while(bind(fd, (struct sockaddr *)&server_addr, struct_len) == -1);
printf("Bind Success!
");
while(listen(fd, 100) == -1);
printf("Listening....
");
printf("Ready for Accept,Waitting...
");
new_fd = accept(fd, (struct sockaddr *)&client_addr, &struct_len);
*/
//printf("Get the Client.
");
// numbytes = send(new_fd,"Welcome to my server
",21,0);
while(1)
{
printf("recemsg
");
struct msghdr msg;
bzero(&msg,sizeof(struct msghdr));
msg.msg_name =&client_addr;
msg.msg_namelen =sizeof(struct sockaddr_in);
struct iovec io;
io.iov_base =buff;
io.iov_len =BUFSIZ;
msg.msg_iov = &io;
msg.msg_iovlen = 1;
numbytes = recvmsg(fd,&msg,0);
char * temp = msg.msg_iov[0].iov_base;//获取得到的数据
temp[numbytes] = ' ';//为数据末尾添加结束符
// printf("get %d message:%s", numbytes,temp);
printf("get %d
", numbytes);
}
// close(new_fd);
close(fd);
return 0;
}
客服端：
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include<time.h>
#include <sys/times.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
//#define BUFSIZ 1024
#define recycle 1000000
static inline uint64_t rte_rdtsc(void)
{
union {
uint64_t tsc_64;
struct {
uint32_t lo_32;
uint32_t hi_32;
};
}tsc;
asm volatile("rdtsc":
"=a" (tsc.lo_32),
"=d" (tsc.hi_32));
return tsc.tsc_64;
}
int recycleSet[]={100,500,1000,5000,10000,50000,100000,500000,1000000,5000000,10000000};
int bufsizeSet[]={128,256,512,1024,2048,3072,4096};
int main(int argc,char *argv[])
{
/*if(argc<3)
{
printf("paramaters error! ./socet_sendmsg 1000 1024");
return -1;
}
int recycle_times=atoi(argv[1]);
int buf_len=atoi(argv[2]);
*/
int sockfd,numbytes;
//char buf[BUFSIZ];
int sc_clk_tck;
sc_clk_tck = sysconf(_SC_CLK_TCK);
struct sockaddr_in their_addr;
//printf("break! sc_clk_tck=%d
",sc_clk_tck);
while((sockfd = socket(AF_INET,SOCK_DGRAM,0)) == -1);
//printf("We get the sockfd~
");
bzero(&their_addr, sizeof(their_addr));
their_addr.sin_family = AF_INET;
their_addr.sin_port = htons(8888);
their_addr.sin_addr.s_addr=inet_addr("192.168.10.8");
//their_addr.sin_addr.s_addr=htonl(INADDR_ANY);
//bzero(&(their_addr.sin_zero), 8);
// while(connect(sockfd,(struct sockaddr*)&their_addr,sizeof(struct sockaddr)) == -1);
// printf("Get the Server~Cheers!
");
// numbytes = recv(sockfd, buf, BUFSIZ,0);//接收服务器端信息
// buf[numbytes]=' ';
// printf("%s",buf);
//clock_t start_time,end_time;
// start_time=clock();
int buf_i=0;
for(buf_i=0;buf_i<7;buf_i++){
int buf_len=bufsizeSet[buf_i];
char *buf=(char *)calloc(buf_len,sizeof(char));
int i=0;
for(i=0;i<buf_len;i++)
{
buf[i]='a' + rand()%26;
}
buf[buf_len]=' ';
struct msghdr msg;
bzero(&msg,sizeof(struct msghdr));
//msg.msg_name = NULL;
msg.msg_name = &their_addr;
msg.msg_namelen = sizeof(struct sockaddr_in);
struct iovec io;
io.iov_base = buf;
io.iov_len = buf_len;
msg.msg_iov = &io;
msg.msg_iovlen = 1;
int recycle_i=0;
for(recycle_i=0;recycle_i<11;recycle_i++){
int recycle_times=recycleSet[recycle_i];
struct timeval start_time,end_time;
gettimeofday(&start_time,NULL);
uint64_t start=rte_rdtsc();
for(i=0;i<recycle_times;i++)
{
//numbytes = send(sockfd, buf, strlen(buf), 0);
numbytes = sendmsg(sockfd, &msg, 0);
//numbytes=recv(sockfd,buf,BUFSIZ,0);
//buf[numbytes]=' ';
//printf("send:%d
",numbytes);
}
uint64_t end=rte_rdtsc();
//end_time=clock();
gettimeofday(&end_time,NULL);
uint64_t duration=end-start;
double duration_time=1000000*(end_time.tv_sec-start_time.tv_sec)+(end_time.tv_usec-start_time.tv_usec);
//printf("recycle_times=%d duration=%f numbytes=%d duration_rte=%f
",recycle_times,duration_time,numbytes,duration/2.2);
printf("%d,%d,%d, %f ,%f,%f
",recycle_times,numbytes,buf_len,duration_time,duration/2.2,duration_time*1.0/recycle_times);
}
}
close(sockfd);
return 0;
}
4，sendmsg性能测试（iovlen=4）
服务器端：
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include<time.h>
#include <sys/times.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
//#define BUFSIZ 1024
#define recycle 1000000
static inline uint64_t rte_rdtsc(void)
{
union {
uint64_t tsc_64;
struct {
uint32_t lo_32;
uint32_t hi_32;
};
}tsc;
asm volatile("rdtsc":
"=a" (tsc.lo_32),
"=d" (tsc.hi_32));
return tsc.tsc_64;
}
int recycleSet[]={100,500,1000,5000,10000,50000,100000,500000,1000000,5000000,10000000};
int bufsizeSet[]={128,256,512,1024,2048,3072,4096,5120,6144,7168,8192,9216,15000,150000};
#define BUF_CNT 14
int main(int argc,char *argv[])
{
/*if(argc<3)
{
printf("paramaters error! ./socet_sendmsg 1000 1024");
return -1;
}
int recycle_times=atoi(argv[1]);
int buf_len=atoi(argv[2]);
*/
int sockfd,numbytes;
//char buf[BUFSIZ];
int sc_clk_tck;
sc_clk_tck = sysconf(_SC_CLK_TCK);
struct sockaddr_in their_addr;
//printf("break! sc_clk_tck=%d
",sc_clk_tck);
while((sockfd = socket(AF_INET,SOCK_DGRAM,0)) == -1);
//printf("We get the sockfd~
");
bzero(&their_addr, sizeof(their_addr));
their_addr.sin_family = AF_INET;
their_addr.sin_port = htons(9999);
their_addr.sin_addr.s_addr=inet_addr("192.168.10.8");
//their_addr.sin_addr.s_addr=htonl(INADDR_ANY);
//bzero(&(their_addr.sin_zero), 8);
// while(connect(sockfd,(struct sockaddr*)&their_addr,sizeof(struct sockaddr)) == -1);
// printf("Get the Server~Cheers!
");
// numbytes = recv(sockfd, buf, BUFSIZ,0);//接收服务器端信息
// buf[numbytes]=' ';
// printf("%s",buf);
//clock_t start_time,end_time;
// start_time=clock();
int buf_i=0;
for(buf_i=0;buf_i<14;buf_i++){
int buf_len=bufsizeSet[buf_i];
char *buf=(char *)calloc(buf_len,sizeof(char));
int i=0;
for(i=0;i<buf_len;i++)
{
buf[i]='a' + rand()%26;
}
buf[buf_len]=' ';
struct msghdr msg;
bzero(&msg,sizeof(struct msghdr));
//msg.msg_name = NULL;
msg.msg_name = &their_addr;
msg.msg_namelen = sizeof(struct sockaddr_in);
struct iovec io[4];
io[0].iov_base = buf;
io[0].iov_len = buf_len;
io[1].iov_base = buf;
io[1].iov_len = buf_len;
io[2].iov_base = buf;
io[2].iov_len = buf_len;
io[3].iov_base = buf;
io[3].iov_len = buf_len;
msg.msg_iov = io;
msg.msg_iovlen =4;
int recycle_i=0;
for(recycle_i=8;recycle_i<9;recycle_i++){
int recycle_times=recycleSet[recycle_i];
struct timeval start_time,end_time;
gettimeofday(&start_time,NULL);
uint64_t start=rte_rdtsc();
for(i=0;i<recycle_times;i++)
{
//numbytes = send(sockfd, buf, strlen(buf), 0);MSG_DONTWAIT
numbytes = sendmsg(sockfd, &msg, 0);
//numbytes=recv(sockfd,buf,BUFSIZ,0);
//buf[numbytes]=' ';
//printf("send:%d
",numbytes);
}
uint64_t end=rte_rdtsc();
//end_time=clock();
gettimeofday(&end_time,NULL);
uint64_t duration=end-start;
double duration_time=1000000*(end_time.tv_sec-start_time.tv_sec)+(end_time.tv_usec-start_time.tv_usec);
//printf("recycle_times=%d duration=%f numbytes=%d duration_rte=%f
",recycle_times,duration_time,numbytes,duration/2.2);
printf("%d,%d,%d, %f ,%f,%f
",recycle_times,numbytes,buf_len,duration_time,duration/2.3,duration_time*1.0/recycle_times);
}
}
close(sockfd);
return 0;
}
客户端：
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
/************************************************************************************************************************
1、int socket(int family,int type,int protocol)
family:
指定使用的协议簇:AF_INET（IPv4） AF_INET6（IPv6） AF_LOCAL（UNIX协议） AF_ROUTE（路由套接字） AF_KEY（秘钥套接字）
type:
指定使用的套接字的类型:SOCK_STREAM（字节流套接字） SOCK_DGRAM
protocol:
如果套接字类型不是原始套接字，那么这个参数就为0
2、int bind(int sockfd, struct sockaddr *myaddr, int addrlen)
sockfd:
socket函数返回的套接字描述符
myaddr:
是指向本地IP地址的结构体指针
myaddrlen:
结构长度
struct sockaddr{
unsigned short sa_family; //通信协议类型族AF_xx
char sa_data[14]; //14字节协议地址，包含该socket的IP地址和端口号
};
struct sockaddr_in{
short int sin_family; //通信协议类型族
unsigned short int sin_port; //端口号
struct in_addr sin_addr; //IP地址
unsigned char si_zero[8]; //填充0以保持与sockaddr结构的长度相同
};
3、int connect(int sockfd,const struct sockaddr *serv_addr,socklen_t addrlen)
sockfd:
socket函数返回套接字描述符
serv_addr:
服务器IP地址结构指针
addrlen:
结构体指针的长度
4、int listen(int sockfd, int backlog)
sockfd:
socket函数绑定bind后套接字描述符
backlog:
设置可连接客户端的最大连接个数，当有多个客户端向服务器请求时，收到此值的影响。默认值20
5、int accept(int sockfd,struct sockaddr *cliaddr,socklen_t *addrlen)
sockfd:
socket函数经过listen后套接字描述符
cliaddr:
客户端套接字接口地址结构
addrlen:
客户端地址结构长度
6、int send(int sockfd, const void *msg,int len,int flags)
7、int recv(int sockfd, void *buf,int len,unsigned int flags)
sockfd:
socket函数的套接字描述符
msg:
发送数据的指针
buf:
存放接收数据的缓冲区
len:
数据的长度，把flags设置为0
*************************************************************************************************************************/
int main(int argc, char *argv[])
{
int fd, new_fd, struct_len, numbytes,i;
struct sockaddr_in server_addr;
struct sockaddr_in client_addr;
char buff[BUFSIZ*10];
printf("BUFFSIZE %d
",BUFSIZ);
//struct msghdr msg;
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(9999);
server_addr.sin_addr.s_addr = INADDR_ANY;
// bzero(&(server_addr.sin_zero), 8);
struct_len = sizeof(struct sockaddr_in);
while((fd = socket(AF_INET,SOCK_DGRAM,0)) == -1);
if (bind(fd, (struct sockaddr*)(&server_addr), struct_len) < 0)
{
printf("bind error
");
return -1;
}
printf("Bind Success!
");
// fd = socket(AF_INET, SOCK_DGRAM, 0);
/*while(bind(fd, (struct sockaddr *)&server_addr, struct_len) == -1);
printf("Bind Success!
");
while(listen(fd, 100) == -1);
printf("Listening....
");
printf("Ready for Accept,Waitting...
");
new_fd = accept(fd, (struct sockaddr *)&client_addr, &struct_len);
*/
//printf("Get the Client.
");
// numbytes = send(new_fd,"Welcome to my server
",21,0);
int cnt=0;
while(1)
{
printf("recemsg
");
struct msghdr msg;
bzero(&msg,sizeof(struct msghdr));
msg.msg_name =&client_addr;
msg.msg_namelen =sizeof(struct sockaddr_in);
struct iovec io;
io.iov_base =buff;
io.iov_len =BUFSIZ*100;
msg.msg_iov = &io;
msg.msg_iovlen = 5;
numbytes = recvmsg(fd,&msg,0);
char * temp = msg.msg_iov[0].iov_base;//获取得到的数据
temp[numbytes] = ' ';//为数据末尾添加结束符
// printf("get %d message:%s", numbytes,temp);
if(numbytes>0)
cnt++;
printf("get %d cnt %d
", numbytes,cnt);
}
// close(new_fd);
close(fd);
return 0;
}
6，send测试数据表
7，sendmsg测试数据表（iovlen=1）
7，sendmsg测试数据表（iovlen=4）
8，比较send，sendmsg（iovlen=1），sendmsg（iovlen=4）
9，用gettimeofday测试性能基本逻辑（gettimeofday和滴答数转化成时间基本差不多）
单位为：微秒
struct timeval start_time,end_time;
gettimeofday(&start_time,NULL);
uint64_t start=rte_rdtsc();
函数调用
uint64_t end=rte_rdtsc();
//end_time=clock();
gettimeofday(&end_time,NULL);
uint64_t duration=end-start;
double duration_time=1000000*(end_time.tv_sec-start_time.tv_sec)+(end_time.tv_usec-start_time.tv_usec);
8，send和sendmsg性能测试比较（循环一千万次，算出一次时间开销（微秒））
结论：
1，send和sendmsg的性能基本一样
2，性能随字节成正比，比如128B~1.55微秒 ，256B~2.57微秒，1024B~8.72微秒，4096B~34.22微秒
3，sendmsg（iovlen=1）和sendmsg（iovlen=4）的在发送相同字节情况下，性能也是4倍，sendmsg在性能上并没得到优化