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 //#define ARR_SIZE 100000
  21 #define ARR_SIZE (1024*768*2)
  22
  23 #ifdef HAVE_MGA
  24
  25 #include "drivers/mga_vid.h"
  26
  27 static mga_vid_config_t mga_vid_config;
  28 static unsigned char* frame=NULL;
  29 static int f;
  30
  31 static int mga_init(){
  32
  33         f = open("/dev/mga_vid",O_RDWR);
  34         if(f == -1)
  35         {
  36                 fprintf(stderr,"Couldn't open /dev/mga_vid\n");
  37                 return(-1);
  38         }
  39
  40         mga_vid_config.num_frames=1;
  41         mga_vid_config.frame_size=ARR_SIZE;
  42         mga_vid_config.format=MGA_VID_FORMAT_YUY2;
  43
  44         mga_vid_config.colkey_on=0;
  45         mga_vid_config.src_width = 640;
  46         mga_vid_config.src_height= 480;
  47         mga_vid_config.dest_width = 320;
  48         mga_vid_config.dest_height= 200;
  49         mga_vid_config.x_org= 0;
  50         mga_vid_config.y_org= 0;
  51
  52         mga_vid_config.version=MGA_VID_VERSION;
  53         if (ioctl(f,MGA_VID_CONFIG,&mga_vid_config))
  54         {
  55                 perror("Error in mga_vid_config ioctl()");
  56                 printf("Your mga_vid driver version is incompatible with this MPlayer version!\n");
  57                 exit(1);
  58         }
  59         ioctl(f,MGA_VID_ON,0);
  60
  61         frame = (char*)mmap(0,mga_vid_config.frame_size*mga_vid_config.num_frames,PROT_WRITE,MAP_SHARED,f,0);
  62         if(!frame){
  63           printf("Can't mmap mga frame\n");
  64           exit(1);
  65         }
  66
  67         //clear the buffer
  68         //memset(frames[0],0x80,mga_vid_config.frame_size*mga_vid_config.num_frames);
  69
  70   return 0;
  71
  72 }
  73
  74 #endif
  75
  76 // Returns current time in microseconds
  77 unsigned int GetTimer(){
  78   struct timeval tv;
  79   struct timezone tz;
  80 //  float s;
  81   gettimeofday(&tv,&tz);
  82 //  s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec;
  83   return (tv.tv_sec*1000000+tv.tv_usec);
  84 }
  85
  86 static inline unsigned long long int read_tsc( void )
  87 {
  88   unsigned long long int retval;
  89   __asm __volatile ("rdtsc":"=A"(retval)::"memory");
  90   return retval;
  91 }
  92
  93 unsigned char  __attribute__((aligned(4096)))arr1[ARR_SIZE],arr2[ARR_SIZE];
  94
  95 int main( void )
  96 {
  97   unsigned long long int v1,v2;
  98   unsigned char * marr1,*marr2;
  99   int i;
 100   unsigned int t;
 101 #ifdef HAVE_MGA
 102   mga_init();
 103   marr1 = &frame[3];
 104 #else
 105   marr1 = &arr1[3];
 106 #endif
 107   marr2 = &arr2[9];
 108
 109   for(i=0; i<ARR_SIZE-16; i++) marr1[i] = marr2[i] = i;
 110
 111   t=GetTimer();
 112   v1 = read_tsc();
 113   for(i=0;i<100;i++) memcpy(marr1,marr2,ARR_SIZE-16);
 114   v2 = read_tsc();
 115   t=GetTimer()-t;
 116   // ARR_SIZE*100/(1024*1024)/(t/1000000) = ARR_SIZE*95.36743/t
 117   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);
 118   return 0;
 119 }