83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
/*
|
|
* Copyright (c) Meta Platforms, Inc. and 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 <benchmark/benchmark.h>
|
|
#include <faiss/impl/ScalarQuantizer.h>
|
|
#include <faiss/utils/distances.h>
|
|
#include <faiss/utils/random.h>
|
|
#include <faiss/utils/utils.h>
|
|
|
|
using namespace faiss;
|
|
|
|
static void bench(benchmark::State& state) {
|
|
int d = 128;
|
|
int n = 2000;
|
|
state.SetLabel(faiss::get_compile_options());
|
|
|
|
std::vector<float> x(d * n);
|
|
|
|
float_rand(x.data(), d * n, 12345);
|
|
|
|
// make sure it's idempotent
|
|
ScalarQuantizer sq(d, ScalarQuantizer::QT_6bit);
|
|
|
|
omp_set_num_threads(1);
|
|
|
|
sq.train(n, x.data());
|
|
|
|
size_t code_size = sq.code_size;
|
|
state.counters["code_size"] = sq.code_size;
|
|
|
|
// encode
|
|
std::vector<uint8_t> codes(code_size * n);
|
|
sq.compute_codes(x.data(), codes.data(), n);
|
|
|
|
// decode
|
|
std::vector<float> x2(d * n);
|
|
sq.decode(codes.data(), x2.data(), n);
|
|
|
|
state.counters["sql2_recons_error"] =
|
|
fvec_L2sqr(x.data(), x2.data(), n * d) / n;
|
|
|
|
// encode again
|
|
std::vector<uint8_t> codes2(code_size * n);
|
|
sq.compute_codes(x2.data(), codes2.data(), n);
|
|
|
|
size_t ndiff = 0;
|
|
for (size_t i = 0; i < codes.size(); i++) {
|
|
if (codes[i] != codes2[i])
|
|
ndiff++;
|
|
}
|
|
|
|
state.counters["ndiff_for_idempotence"] = ndiff;
|
|
|
|
state.counters["code_size_two"] = codes.size();
|
|
|
|
std::unique_ptr<ScalarQuantizer::SQDistanceComputer> dc(
|
|
sq.get_distance_computer());
|
|
dc->codes = codes.data();
|
|
dc->code_size = sq.code_size;
|
|
state.counters["code_size_three"] = dc->code_size;
|
|
|
|
for (auto _ : state) {
|
|
float sum_dis = 0;
|
|
for (int i = 0; i < n; i++) {
|
|
dc->set_query(&x[i * d]);
|
|
for (int j = 0; j < n; j++) {
|
|
benchmark::DoNotOptimize(sum_dis += (*dc)(j));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// I think maybe n and d should be input arguments
|
|
// for things to really make sense, idk.
|
|
BENCHMARK(bench)->Iterations(20);
|
|
BENCHMARK_MAIN();
|