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