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#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <sys/times.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <math.h>
#include <signal.h>
#include <X11/Xlib.h>
#include "lzf.h"
//#include "fastlz.c"
typedef unsigned long tval;
typedef unsigned long long stamp64;
extern inline tval stamp(void)
{
tval tsc;
asm volatile("rdtsc" : "=a" (tsc) : : "edx");
return tsc;
}
extern inline tval measure(tval t)
{
tval tsc;
asm volatile("rdtsc" : "=a" (tsc) : : "edx");
if (tsc>t)
return tsc-t;
else
return t-tsc;
}
static void sigu (int signum)
{
}
int eventfd(unsigned int,int);
#define DSIZE 2821120
unsigned char data[DSIZE], data2[DSIZE*2], data3[DSIZE*2];
int main(void)
{
tval s;
tval si[1000];
int i, l, j;
int min = 1<<30;
int lp;
char buf[8192];
int p[2];
int evfd = eventfd (0, 0);
long ctr = 1;
struct stat sbuf;
pipe (p);
FILE *f = fopen ("data", "r");
fread (data, DSIZE, 1, f);
fclose (f);
signal (SIGURG, sigu);
for (lp = 0; lp < 1000000; lp++) {
s=stamp();
//struct timespec ts; clock_gettime (CLOCK_THREAD_CPUTIME_ID, &ts);
//printf ("%9ld\n", ts.tv_nsec);//D
//struct rusage usage; getrusage (RUSAGE_SELF, &usage);
//struct tms tms; times (&tms);
//kill (0, SIGURG);
//write (evfd, &ctr, 8);
//read (evfd, &ctr, 8);
//write (p[1], &buf, 1);
//read (p[0], &buf, 4);
//stat ("/etc/passwd", &sbuf);
//struct timeval tv; gettimeofday (&tv, 0);
//void *x = mmap (0, 16384, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE,-1,0);
l = lzf_compress (data, DSIZE, data2, DSIZE*2);
assert(l);
j = lzf_decompress (data2, l, data3, DSIZE*2);
assert (j == DSIZE);
si[0]=measure(s);
assert (!memcmp (data, data3, DSIZE));
printf ("\r%10d (%d) ", si[0], l);
if (si[0] < min && si[0] > 0)
{
printf ("\n");
min = si[0];
}
fflush (stdout);
//assert (memcmp (data, data3, DSIZE) == 0);
}
return 0;
}
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