[英]SUN RPC (ONC/RPC): Calculating round trip time (or pinging) using null procedure in C
如何計算或估算客戶端和服務器之間的RTT(往返時間)?
解決這個問題的教程或示例也可以提供幫助。
這是我的工作:
#include <rpc/rpc.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/times.h>
#include <fcntl.h>
#include <time.h>
int main(int argc, char *argv[]) {
enum clnt_stat status;
CLIENT *handle;
struct timeval t;
clock_t rtime;
struct tms dumm;
int count = 100000;
int i;
time_t now;
char stamp[27];
int programm;
int version;
if (argc != 4) {
printf("Usage: rpcping <host> <program> <version>\n");
exit(1);
}
/*
* Create Client Handle
*/
programm = atoi(argv[2]);
version = atoi(argv[3]);
handle = clnt_create(argv[1], programm, version, "tcp");
if (handle == NULL) {
printf("clnt failed\n");
exit(1);
}
/*
* use 30 seconds timeout
*/
t.tv_sec = 30;
t.tv_usec = 0;
while (1) {
rtime = times(&dumm);
for (i = 0; i < count; i++) {
status = clnt_call(handle, 0, (xdrproc_t) xdr_void,
NULL, (xdrproc_t) xdr_void, NULL, t);
if (status == RPC_SUCCESS) { /* NOP */ }
}
now = time(NULL);
ctime_r(&now, stamp);
stamp[strlen(stamp) - 1] = '\0';
fprintf(stdout, "[%s]: Speed: %2.4fs.\n", stamp,
count / ((double) (times(&dumm) - rtime) / (double) sysconf(_SC_CLK_TCK)));
fflush(stdout);
}
clnt_destroy(handle);
}
我也有一個多線程版本
https://gist.github.com/2401404
tigran。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.