mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 01:22:30 +00:00
cc5af9a1b6
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3083 b3059339-0415-0410-9bf9-f77b7e298cf2
124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/*
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fastmemcpybench.c used to benchmark fastmemcpy.h code from libvo.
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Note: this code can not be used on PentMMX-PII because they contain
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a bug in rdtsc. For Intel processors since P6(PII) rdpmc should be used
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instead. For PIII it's disputable and seems bug was fixed but I don't
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tested it.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/time.h>
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#include "../libvo/fastmemcpy.h"
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//#define ARR_SIZE 100000
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#define ARR_SIZE (1024*768*2)
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#ifdef HAVE_MGA
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#include "../drivers/mga_vid.h"
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static int mga_next_frame=0;
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static mga_vid_config_t mga_vid_config;
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static unsigned char* frame=NULL;
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static int f;
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static int mga_init(){
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char *frame_mem;
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f = open("/dev/mga_vid",O_RDWR);
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if(f == -1)
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{
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fprintf(stderr,"Couldn't open /dev/mga_vid\n");
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return(-1);
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}
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mga_vid_config.num_frames=1;
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mga_vid_config.frame_size=ARR_SIZE;
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mga_vid_config.format=MGA_VID_FORMAT_YUY2;
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mga_vid_config.colkey_on=0;
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mga_vid_config.src_width = 640;
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mga_vid_config.src_height= 480;
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mga_vid_config.dest_width = 320;
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mga_vid_config.dest_height= 200;
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mga_vid_config.x_org= 0;
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mga_vid_config.y_org= 0;
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mga_vid_config.version=MGA_VID_VERSION;
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if (ioctl(f,MGA_VID_CONFIG,&mga_vid_config))
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{
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perror("Error in mga_vid_config ioctl()");
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printf("Your mga_vid driver version is incompatible with this MPlayer version!\n");
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exit(1);
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}
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ioctl(f,MGA_VID_ON,0);
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frame = (char*)mmap(0,mga_vid_config.frame_size*mga_vid_config.num_frames,PROT_WRITE,MAP_SHARED,f,0);
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if(!frame){
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printf("Can't mmap mga frame\n");
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exit(1);
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}
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//clear the buffer
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//memset(frames[0],0x80,mga_vid_config.frame_size*mga_vid_config.num_frames);
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return 0;
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}
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#endif
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// Returns current time in microseconds
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unsigned int GetTimer(){
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struct timeval tv;
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struct timezone tz;
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// float s;
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gettimeofday(&tv,&tz);
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// s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec;
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return (tv.tv_sec*1000000+tv.tv_usec);
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}
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static inline unsigned long long int read_tsc( void )
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{
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unsigned long long int retval;
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__asm __volatile ("rdtsc":"=A"(retval)::"memory");
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return retval;
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}
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unsigned char __attribute__((aligned(4096)))arr1[ARR_SIZE],arr2[ARR_SIZE];
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int main( void )
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{
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unsigned long long int v1,v2;
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unsigned char * marr1,*marr2;
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int i;
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unsigned int t;
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#ifdef HAVE_MGA
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mga_init();
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marr1 = &frame[3];
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#else
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marr1 = &arr1[3];
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#endif
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marr2 = &arr2[9];
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for(i=0; i<ARR_SIZE-16; i++) marr1[i] = marr2[i] = i;
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t=GetTimer();
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v1 = read_tsc();
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for(i=0;i<100;i++) memcpy(marr1,marr2,ARR_SIZE-16);
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v2 = read_tsc();
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t=GetTimer()-t;
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// ARR_SIZE*100/(1024*1024)/(t/1000000) = ARR_SIZE*95.36743/t
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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);
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return 0;
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}
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