TOOLS/fastmemcpybench.c

   1 /*
   2    fastmemcpybench.c used to benchmark fastmemcpy.h code from libvo.
   3
   4    Note: this code can not be used on PentMMX-PII because they contain
   5    a bug in rdtsc. For Intel processors since P6(PII) rdpmc should be used
   6    instead. For PIII it's disputable and seems bug was fixed but I don't
   7    tested it.
   8 */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <sys/ioctl.h>
  14 #include <unistd.h>
  15 #include <fcntl.h>
  16 #include <sys/mman.h>
  17 #include <sys/time.h>
  18 #include <inttypes.h>
  19
  20 #include "libvo/fastmemcpy.h"
  21
  22 //#define ARR_SIZE 100000
  23 #define ARR_SIZE (1024*768*2)
  24
  25 #ifdef HAVE_MGA
  26
  27 #include "drivers/mga_vid.h"
  28
  29 static int mga_next_frame=0;
  30
  31 static mga_vid_config_t mga_vid_config;
  32 static unsigned char* frame=NULL;
  33 static int f;
  34
  35 static int mga_init(){
  36         char *frame_mem;
  37
  38         f = open("/dev/mga_vid",O_RDWR);
  39         if(f == -1)
  40         {
  41                 fprintf(stderr,"Couldn't open /dev/mga_vid\n");
  42                 return(-1);
  43         }
  44
  45         mga_vid_config.num_frames=1;
  46         mga_vid_config.frame_size=ARR_SIZE;
  47         mga_vid_config.format=MGA_VID_FORMAT_YUY2;
  48
  49         mga_vid_config.colkey_on=0;
  50         mga_vid_config.src_width = 640;
  51         mga_vid_config.src_height= 480;
  52         mga_vid_config.dest_width = 320;
  53         mga_vid_config.dest_height= 200;
  54         mga_vid_config.x_org= 0;
  55         mga_vid_config.y_org= 0;
  56
  57         mga_vid_config.version=MGA_VID_VERSION;
  58         if (ioctl(f,MGA_VID_CONFIG,&mga_vid_config))
  59         {
  60                 perror("Error in mga_vid_config ioctl()");
  61                 printf("Your mga_vid driver version is incompatible with this MPlayer version!\n");
  62                 exit(1);
  63         }
  64         ioctl(f,MGA_VID_ON,0);
  65
  66         frame = (char*)mmap(0,mga_vid_config.frame_size*mga_vid_config.num_frames,PROT_WRITE,MAP_SHARED,f,0);
  67         if(!frame){
  68           printf("Can't mmap mga frame\n");
  69           exit(1);
  70         }
  71
  72         //clear the buffer
  73         //memset(frames[0],0x80,mga_vid_config.frame_size*mga_vid_config.num_frames);
  74
  75   return 0;
  76
  77 }
  78
  79 #endif
  80
  81 // Returns current time in microseconds
  82 unsigned int GetTimer(){
  83   struct timeval tv;
  84   struct timezone tz;
  85 //  float s;
  86   gettimeofday(&tv,&tz);
  87 //  s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec;
  88   return (tv.tv_sec*1000000+tv.tv_usec);
  89 }
  90
  91 static inline unsigned long long int read_tsc( void )
  92 {
  93   unsigned long long int retval;
  94   __asm __volatile ("rdtsc":"=A"(retval)::"memory");
  95   return retval;
  96 }
  97
  98 unsigned char  __attribute__((aligned(4096)))arr1[ARR_SIZE],arr2[ARR_SIZE];
  99
 100 int main( void )
 101 {
 102   unsigned long long int v1,v2;
 103   unsigned char * marr1,*marr2;
 104   int i;
 105   unsigned int t;
 106 #ifdef HAVE_MGA
 107   mga_init();
 108   marr1 = &frame[3];
 109 #else
 110   marr1 = &arr1[3];
 111 #endif
 112   marr2 = &arr2[9];
 113
 114   for(i=0; i<ARR_SIZE-16; i++) marr1[i] = marr2[i] = i;
 115
 116   t=GetTimer();
 117   v1 = read_tsc();
 118   for(i=0;i<100;i++) memcpy(marr1,marr2,ARR_SIZE-16);
 119   v2 = read_tsc();
 120   t=GetTimer()-t;
 121   // ARR_SIZE*100/(1024*1024)/(t/1000000) = ARR_SIZE*95.36743/t
 122   printf(NAME": cpu clocks=%llu = %dus  (%5.3ffps)  %5.1fMB/s\n",v2-v1,t,100000000.0f/(float)t,(float)ARR_SIZE*95.36743f/(float)t);
 123   return 0;
 124 }