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CPU-Benchmark hamamips.c
#include "stdio.h"
#include "stdlib.h"
#include "time.h"
#include "math.h"
typedef unsigned long seed_t;
#define DEFINE_VARS(seed, x, y, z, c) seed_t seed = 0x20111958UL; \
seed_t x = 0x33221122UL; \
seed_t y = 0x73829382UL; \
seed_t z = 0xabcdef07UL; \
seed_t c = 0
#define next(seed, x, y, z, c) \
do { \
x = x * 0x20111957 + 0x11121989; \
y ^= y << 13; \
y ^= y >> 17; \
y ^= y << 5; \
seed_t t = 698769069UL * z + c; \
c = t << 31; \
z = t; \
seed = x + y + z; \
} while (0)
seed_t calcRandom(int millions){
DEFINE_VARS(seed, x, y, z, c);
seed_t rc = 0;
while (millions-- > 0){
int ix2 = 1000000;
while(ix2-- > 0){
next(seed, x, y, z, c);
rc += seed;
}
}
return rc;
}
int memSpeed(int megaBytes, int rounds){
clock_t duration, duration2, start = clock();
int ix, ix2, ix3, ix1, round;
double** buffers = (double**) malloc(megaBytes * 1024 * 1024);
int bufferEntries = 1024*1024/sizeof(double);
for (ix = 0; ix < megaBytes; ix++){
buffers[ix] = (double*) malloc(sizeof(double)*bufferEntries);
for (ix2 = 0; ix2 < bufferEntries; ix2++)
buffers[ix][ix2] = ix2*ix;
}
duration2 = clock() - start;
for (round = 0; round < rounds; round++)
for (ix2 = bufferEntries - 1, ix3 = 0; ix2 >= 0; ix2--, ix3++)
for (ix = megaBytes - 1, ix1 = 0; ix >= 0; ix--, ix1++)
if (buffers[ix][ix2] != buffers[ix1][ix3] + buffers[ix1][ix2])
buffers[ix][ix2] += buffers[ix][ix3] - buffers[ix1][ix3] + buffers[ix1][ix2];
duration = clock() - start - duration2;
printf("%.3f MemMips %.3f / %.4f sec %d MiBytes %d rounds\n",
pow(megaBytes, 1.3) * (double) CLOCKS_PER_SEC * rounds / duration / 16,
duration / (double) CLOCKS_PER_SEC , duration2 / (double) CLOCKS_PER_SEC,
megaBytes, rounds);
}
int main(int argc, char** argv){
clock_t duration, start = clock();
int millions = 100, megaBytes = 50, rounds = 1000 * millions / 400 / megaBytes;
if (rounds < 1)
rounds = 1;
seed_t value;
if (argc > 1 && atol(argv[1]) != 0)
millions = atol(argv[1]);
if (argc > 2 && atol(argv[2]) != 0)
megaBytes = atol(argv[2]);
value = calcRandom(millions);
duration = clock() - start;
printf ("%.3f HamaMips %.3f sec value: %04x-%04x\n",
millions * (double) CLOCKS_PER_SEC / duration,
duration / (double) CLOCKS_PER_SEC,
(value >> 16) & 0xffff, value & 0xffff);
memSpeed(megaBytes, rounds);
}
gcc -O3 -lm hamamips.c && ./a.out