/* * (C) Finite State Machine Labs Inc. 1999 business@fsmlabs.com * * Released under the terms of GPL 2. * Open RTLinux makes use of a patented process described in * US Patent 5,995,745. Use of this process is governed * by the Open RTLinux Patent License which can be obtained from * www.fsmlabs.com/PATENT or by sending email to * licensequestions@fsmlabs.com */#include <stdio.h>#include <errno.h>#include <sys/time.h>#include <sys/types.h>#include <fcntl.h>#include <unistd.h>#include <sys/ioctl.h>#include <rtl_fifo.h>#include <rtl_time.h>struct samp {	hrtime_t min, max, total;	hrtime_t period;	int cnt;};int main(){	int fd0;	int n;	struct samp sm;	FILE *f;	int i = 0;	if ((fd0 = open("/dev/rtf0", O_RDONLY)) < 0) {		fprintf(stderr, "Error opening /dev/rtf0\n");		exit(1);	}	while (i < 50) {		n = read(fd0, &sm, sizeof(sm));#define NS_TO_US(x) ((x)/(NSECS_PER_SEC/1000000))		if (		    ((ulong) NS_TO_US((int) sm.min - (int) sm.period) <		     -30)		    || ((ulong) NS_TO_US((int) sm.max - (int) sm.period) >			30)) exit - 1;		i++;#if 0		printf		    ("min: %5ldus \tavg: %5ldus \tmax: %5ldus \tperiod: %5ldus\n",		     (ulong) NS_TO_US((int) sm.min - (int) sm.period),		     (ulong) NS_TO_US(((int) sm.total / (int) sm.cnt) -				      (int) sm.period),		     (ulong) NS_TO_US((int) sm.max - (int) sm.period),		     (ulong) NS_TO_US((int) sm.period));		fflush(stdout);		fprintf(f, "%d %ld %5ld %5ld %5ld\n",			i, (ulong) NS_TO_US((int) sm.min /*-sm.period*/ ),			(ulong) NS_TO_US(((int) sm.total / (int) sm.cnt) /*-sm.period*/ ),			(ulong) NS_TO_US((int) sm.max /*-sm.period*/ ),			(ulong) NS_TO_US((int) sm.period));		fflush(f);#endif	}	return 0;}