35 lines
858 B
C
35 lines
858 B
C
#include <stdio.h>
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#include <sys/time.h>
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extern void icache_test(long count, long step);
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extern void icache_test2(long count);
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int main()
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{
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printf("[bytes]\t[us]\n");
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struct timeval now, tm;
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long long t;
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long MBs;
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long i;
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long step = 32;
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for (i=0 ; step<=2048 ; i++, step+=32)
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{
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long value;
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gettimeofday(&now, 0);
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icache_test(0x800000L, step);
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gettimeofday(&tm, 0);
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t = (tm.tv_sec*1000000LL+tm.tv_usec) - (now.tv_sec*1000000LL+now.tv_usec);
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printf("%6ld\t%lld\n", step*32, t);
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}
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gettimeofday(&now, 0);
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icache_test2(0x800000L / 2048);
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gettimeofday(&tm, 0);
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t = (tm.tv_sec*1000000LL+tm.tv_usec) - (now.tv_sec*1000000LL+now.tv_usec);
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MBs = (8388608LL*32*1000000) / (t * (1024*1024));
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printf("\n%6lld us\t%ld MB/s\n", t, MBs);
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return 0;
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}
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