94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#include <omp.h>
|
|
#include <cstdio>
|
|
#include <vector>
|
|
|
|
#include <faiss/impl/FaissAssert.h>
|
|
#include <faiss/utils/hamming.h>
|
|
#include <faiss/utils/random.h>
|
|
#include <faiss/utils/utils.h>
|
|
|
|
using namespace faiss;
|
|
|
|
template <class T>
|
|
void hamming_cpt_test(
|
|
int code_size,
|
|
uint8_t* data1,
|
|
uint8_t* data2,
|
|
int n,
|
|
int* rst) {
|
|
T computer(data1, code_size);
|
|
for (int i = 0; i < n; i++) {
|
|
rst[i] = computer.hamming(data2);
|
|
data2 += code_size;
|
|
}
|
|
}
|
|
|
|
int main() {
|
|
size_t n = 4 * 1000 * 1000;
|
|
|
|
std::vector<size_t> code_size = {128, 256, 512, 1000};
|
|
|
|
std::vector<uint8_t> x(n * code_size.back());
|
|
byte_rand(x.data(), n, 12345);
|
|
|
|
int nrun = 100;
|
|
for (size_t cs : code_size) {
|
|
printf("benchmark with code_size=%zd n=%zd nrun=%d\n", cs, n, nrun);
|
|
|
|
double tot_t1 = 0, tot_t2 = 0, tot_t3 = 0;
|
|
#pragma omp parallel reduction(+ : tot_t1, tot_t2, tot_t3)
|
|
{
|
|
std::vector<int> rst_m4(n);
|
|
std::vector<int> rst_m8(n);
|
|
std::vector<int> rst_default(n);
|
|
|
|
#pragma omp for
|
|
for (int run = 0; run < nrun; run++) {
|
|
double t0, t1, t2, t3;
|
|
t0 = getmillisecs();
|
|
|
|
// new implem from Zilliz
|
|
hamming_cpt_test<HammingComputerDefault>(
|
|
cs, x.data(), x.data(), n, rst_default.data());
|
|
t1 = getmillisecs();
|
|
|
|
// M8
|
|
hamming_cpt_test<HammingComputerM8>(
|
|
cs, x.data(), x.data(), n, rst_m8.data());
|
|
t2 = getmillisecs();
|
|
|
|
// M4
|
|
hamming_cpt_test<HammingComputerM4>(
|
|
cs, x.data(), x.data(), n, rst_m4.data());
|
|
t3 = getmillisecs();
|
|
|
|
tot_t1 += t1 - t0;
|
|
tot_t2 += t2 - t1;
|
|
tot_t3 += t3 - t2;
|
|
}
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
FAISS_THROW_IF_NOT_FMT(
|
|
(rst_m4[i] == rst_m8[i] && rst_m4[i] == rst_default[i]),
|
|
"wrong result i=%d, m4 %d m8 %d default %d",
|
|
i,
|
|
rst_m4[i],
|
|
rst_m8[i],
|
|
rst_default[i]);
|
|
}
|
|
}
|
|
|
|
printf("Hamming_Dft implem: %.3f ms\n", tot_t1 / nrun);
|
|
printf("Hamming_M8 implem: %.3f ms\n", tot_t2 / nrun);
|
|
printf("Hamming_M4 implem: %.3f ms\n", tot_t3 / nrun);
|
|
}
|
|
return 0;
|
|
}
|