liblzf/bench.c

#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;
}


Revision:	1.12
Committed:	Sun May 30 05:46:56 2010 UTC (13 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.11:	+9 -5 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include <stdio.h>
2			#include <assert.h>
3			#include <string.h>
4	root	1.7	#include <time.h>
5			#include <sys/time.h>
6	root	1.11	#include <sys/times.h>
7	root	1.7	#include <sys/types.h>
8			#include <sys/socket.h>
9	root	1.12	#include <sys/mman.h>
10	root	1.7	#include <sys/ioctl.h>
11	root	1.9	#include <sys/stat.h>
12	root	1.11	#include <sys/resource.h>
13	root	1.7	#include <math.h>
14	root	1.8	#include <signal.h>
15	root	1.7	#include <X11/Xlib.h>
16	root	1.1
17			#include "lzf.h"
18	root	1.4	//#include "fastlz.c"
19	root	1.1
20			typedef unsigned long tval;
21			typedef unsigned long long stamp64;
22
23			extern inline tval stamp(void)
24			{
25			tval tsc;
26			asm volatile("rdtsc" : "=a" (tsc) : : "edx");
27			return tsc;
28			}
29
30			extern inline tval measure(tval t)
31			{
32			tval tsc;
33			asm volatile("rdtsc" : "=a" (tsc) : : "edx");
34			if (tsc>t)
35			return tsc-t;
36			else
37			return t-tsc;
38			}
39
40	root	1.8	static void sigu (int signum)
41			{
42			}
43
44			int eventfd(unsigned int,int);
45
46	root	1.4	#define DSIZE 2821120
47	root	1.1
48			unsigned char data[DSIZE], data2[DSIZE2], data3[DSIZE2];
49
50			int main(void)
51			{
52			tval s;
53			tval si[1000];
54			int i, l, j;
55			int min = 1<<30;
56	root	1.2	int lp;
57	root	1.7	char buf[8192];
58			int p[2];
59	root	1.8	int evfd = eventfd (0, 0);
60			long ctr = 1;
61	root	1.9	struct stat sbuf;
62	root	1.7
63			pipe (p);
64	root	1.1
65			FILE *f = fopen ("data", "r");
66			fread (data, DSIZE, 1, f);
67			fclose (f);
68	root	1.7
69	root	1.8	signal (SIGURG, sigu);
70
71	root	1.11	for (lp = 0; lp < 1000000; lp++) {
72	root	1.6	s=stamp();
73	root	1.7
74	root	1.12	//struct timespec ts; clock_gettime (CLOCK_THREAD_CPUTIME_ID, &ts);
75	root	1.11	//printf ("%9ld\n", ts.tv_nsec);//D
76			//struct rusage usage; getrusage (RUSAGE_SELF, &usage);
77			//struct tms tms; times (&tms);
78
79	root	1.8	//kill (0, SIGURG);
80			//write (evfd, &ctr, 8);
81			//read (evfd, &ctr, 8);
82	root	1.9	//write (p[1], &buf, 1);
83			//read (p[0], &buf, 4);
84			//stat ("/etc/passwd", &sbuf);
85	root	1.11	//struct timeval tv; gettimeofday (&tv, 0);
86	root	1.12	//void *x = mmap (0, 16384, PROT_READ\|PROT_WRITE, MAP_ANONYMOUS\|MAP_PRIVATE,-1,0);
87	root	1.10
88	root	1.12	l = lzf_compress (data, DSIZE, data2, DSIZE*2);
89			assert(l);
90
91			j = lzf_decompress (data2, l, data3, DSIZE*2);
92			assert (j == DSIZE);
93	root	1.7
94	root	1.6	si[0]=measure(s);
95	root	1.7
96	root	1.12	assert (!memcmp (data, data3, DSIZE));
97	root	1.1
98			printf ("\r%10d (%d) ", si[0], l);
99			if (si[0] < min && si[0] > 0)
100			{
101			printf ("\n");
102			min = si[0];
103			}
104
105			fflush (stdout);
106
107	root	1.7	//assert (memcmp (data, data3, DSIZE) == 0);
108	root	1.1	}
109			return 0;
110			}
111
112
113