1 #include <stdio.h> 2 #include <sys/time.h> 3 4 extern void icache_test(long count, long step); 5 extern void icache_test2(long count); 6 7 int main() 8 { 9 printf("[bytes]\t[us]\n"); 10 11 struct timeval now, tm; 12 long long t; 13 long MBs; 14 long i; 15 long step = 32; 16 for (i=0 ; step<=2048 ; i++, step+=32) 17 { 18 long value; 19 gettimeofday(&now, 0); 20 icache_test(0x800000L, step); 21 gettimeofday(&tm, 0); 22 t = (tm.tv_sec*1000000LL+tm.tv_usec) - (now.tv_sec*1000000LL+now.tv_usec); 23 printf("%6ld\t%lld\n", step*32, t); 24 } 25 26 gettimeofday(&now, 0); 27 icache_test2(0x800000L / 2048); 28 gettimeofday(&tm, 0); 29 t = (tm.tv_sec*1000000LL+tm.tv_usec) - (now.tv_sec*1000000LL+now.tv_usec); 30 MBs = (8388608LL*32*1000000) / (t * (1024*1024)); 31 printf("\n%6lld us\t%ld MB/s\n", t, MBs); 32 33 return 0; 34 } 35
