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
  19 #include "../libvo/fastmemcpy.h"
  20
  21 //#define ARR_SIZE 100000
  22 #define ARR_SIZE (1024*768*2)
  23
  24 #ifdef HAVE_MGA
  25
  26 #include "../drivers/mga_vid.h"
  27
  28 static int mga_next_frame=0;
  29
  30 static mga_vid_config_t mga_vid_config;
  31 static unsigned char* frame=NULL;
  32 static int f;
  33
  34 static int mga_init(){
  35         char *frame_mem;
  36
  37         f = open("/dev/mga_vid",O_RDWR);
  38         if(f == -1)
  39         {
  40                 fprintf(stderr,"Couldn't open /dev/mga_vid\n");
  41                 return(-1);
  42         }
  43
  44         mga_vid_config.num_frames=1;
  45         mga_vid_config.frame_size=ARR_SIZE;
  46         mga_vid_config.format=MGA_VID_FORMAT_YUY2;
  47
  48         mga_vid_config.colkey_on=0;
  49         mga_vid_config.src_width = 640;
  50         mga_vid_config.src_height= 480;
  51         mga_vid_config.dest_width = 320;
  52         mga_vid_config.dest_height= 200;
  53         mga_vid_config.x_org= 0;
  54         mga_vid_config.y_org= 0;
  55
  56         mga_vid_config.version=MGA_VID_VERSION;
  57         if (ioctl(f,MGA_VID_CONFIG,&mga_vid_config))
  58         {
  59                 perror("Error in mga_vid_config ioctl()");
  60                 printf("Your mga_vid driver version is incompatible with this MPlayer version!\n");
  61                 exit(1);
  62         }
  63         ioctl(f,MGA_VID_ON,0);
  64
  65         frame = (char*)mmap(0,mga_vid_config.frame_size*mga_vid_config.num_frames,PROT_WRITE,MAP_SHARED,f,0);
  66         if(!frame){
  67           printf("Can't mmap mga frame\n");
  68           exit(1);
  69         }
  70
  71         //clear the buffer
  72         //memset(frames[0],0x80,mga_vid_config.frame_size*mga_vid_config.num_frames);
  73
  74   return 0;
  75
  76 }
  77
  78 #endif
  79
  80 // Returns current time in microseconds
  81 unsigned int GetTimer(){
  82   struct timeval tv;
  83   struct timezone tz;
  84 //  float s;
  85   gettimeofday(&tv,&tz);
  86 //  s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec;
  87   return (tv.tv_sec*1000000+tv.tv_usec);
  88 }
  89
  90 static inline unsigned long long int read_tsc( void )
  91 {
  92   unsigned long long int retval;
  93   __asm __volatile ("rdtsc":"=A"(retval)::"memory");
  94   return retval;
  95 }
  96
  97 unsigned char  __attribute__((aligned(4096)))arr1[ARR_SIZE],arr2[ARR_SIZE];
  98
  99 int main( void )
 100 {
 101   unsigned long long int v1,v2;
 102   unsigned char * marr1,*marr2;
 103   int i;
 104   unsigned int t;
 105 #ifdef HAVE_MGA
 106   mga_init();
 107   marr1 = &frame[3];
 108 #else
 109   marr1 = &arr1[3];
 110 #endif
 111   marr2 = &arr2[9];
 112
 113   for(i=0; i<ARR_SIZE-16; i++) marr1[i] = marr2[i] = i;
 114
 115   t=GetTimer();
 116   v1 = read_tsc();
 117   for(i=0;i<100;i++) memcpy(marr1,marr2,ARR_SIZE-16);
 118   v2 = read_tsc();
 119   t=GetTimer()-t;
 120   // ARR_SIZE*100/(1024*1024)/(t/1000000) = ARR_SIZE*95.36743/t
 121   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);
 122   return 0;
 123 }