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我正在为Linux项目和Linux上的本地套接字性能进行基准测试.出于某种原因,我无法发现,Solaris上的性能比Linux上差100倍.在Linux中,打开一个套接字,每次交换一个非常短(2个字符)的消息并关闭它需要大约10us的时间.在Solaris上,同样的事情需要大约1000us.
设置是Virtual Box和Linux中的Solaris 10开发人员vm,它们位于同一个虚拟盒中,并且直接位于相同的硬件上(没有区别).
这是Solaris的已知问题吗?有办法解决吗?我无法使用本地网络连接,原因是我无法进入此处.
下面的客户端和服务器代码.使用“cc -fast -m64 -lrt -lsocket -lnsl -o server server.c”和客户端的等效文件进行编译.随Solaris 10提供的Gcc 3.4.3给出了可比较的结果.此代码已被删除,例如已删除超时结束错误处理是最小的.
server.c:
#include <>dio.h>
#include cpy(addr.sun_path,FULL_PATH,sizeof(addr.sun_path));
// Remove old pseudo file if present
ret = unlink(FULL_PATH);
if (ret == -1 && errno != ENOENT) {
on_error(ret,"\nRemoving old socket file\n");
}
// Remove old directory if present
ret = rmdir(DIRECTORY);
if (ret == -1 && errno != ENOENT) {
on_error(ret,"\nRemoving old socket directory\n");
}
// Re-create new directory with appropriate permissonsm
ret = mkdir(DIRECTORY,PERMISSIONS);
on_error(ret,"\nCreating directoroy for socket file\n");
// create server listening socket
srv_fd = socket(AF_UNIX,SOCK_STREAM,0);
on_error(srv_fd,"\nSocket creation:\n");
// bind server listening socket to address
ret = bind(srv_fd,(struct sockaddr *) &addr,sizeof(addr));
on_error(ret,"\nSocket binding:\n");
// set file permissions for socket file (somewhat redundant)
ret = chmod(FULL_PATH,"\nSetting socket file permissions\n");
// set socket listening and queue length
ret = listen(srv_fd,10);
on_error(ret,"\nSet socket to listen:\n");
while(1) {
// accept requests
inst_fd = accept(srv_fd,NULL,NULL);
on_error(inst_fd,"\n accepting connection:\n");
// prepare to use select on inst_fd
FD_ZERO(&rfds);
FD_SET(inst_fd,&rfds);
// Now interact with the client on the instance socket.
while(1) {
num_read = 0;
while (1) {
// read a line terminated by '\n'
ret = select(inst_fd + 1,&rfds,NULL);
on_error(ret,"\nSelect on socket\n");
if (ret == 1) {
// we can read something
ret = recv(inst_fd,readbuf+num_read,MAX_COMMAND_LEN-num_read,0
on_error(ret,"\nrecv:\n");
if (ret == 0) {
break; // we have EOF
}
num_read += ret;
if (readbuf[num_read - 1] == '\n') {
break;
}
}
} /* reading one input line done */
if (num_read == 0) break; // EOF propagated
// process command: Just send 2 chars back
ret = send(inst_fd,"n\n",2,0);
}
close(inst_fd); // clean up
}
// runs forever...
}
client.c:
#include <>dio.h>
#include < cycles;="" count++)="" {="" create="" socket="" client_fd="socket(PF_UNIX,0);" on_error(client_fd,"socket()="">Failed");
// prepare to use select on inst_fd
FD_ZERO(&rfds);
FD_SET(client_fd,&rfds);
// connect
ret = connect(client_fd,sizeof(addr));
on_error(ret,"connect() Failed");
// send msg to server
ret = send(client_fd,msg,0);
if (ret != 2) {
on_error(-1,"\nnot all bytes sent\n");
}
num_read = 0;
// read until we have a '\n'
while (1) {
ret = select(client_fd + 1,NULL);
on_error(ret,"\nSelect on socket\n");
if (ret == 1) {
// we can read something
ret = recv(client_fd,readbuf + num_read,RCVBUFSIZE - num_read,0)
on_error(ret,"\nrecv:\n");
num_read += ret;
if (readbuf[num_read - 1] == '\n') break;
}
}
if (num_read == 0) break;
close(client_fd);
}
return(0);
}
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