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/**
* Copyright (c) 2016-present, Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cstdio>
#include <thread>
#include <vector>
#include "caffe2/core/db.h"
#include "caffe2/core/init.h"
#include "caffe2/core/timer.h"
#include "caffe2/core/logging.h"
C10_DEFINE_string(input_db, "", "The input db.");
C10_DEFINE_string(input_db_type, "", "The input db type.");
C10_DEFINE_int(report_interval, 1000, "The report interval.");
C10_DEFINE_int(repeat, 10, "The number to repeat the throughput test.");
C10_DEFINE_bool(use_reader, false, "If true, use the reader interface.");
C10_DEFINE_int(
num_read_threads,
1,
"The number of concurrent reading threads.");
using caffe2::db::Cursor;
using caffe2::db::DB;
using caffe2::db::DBReader;
using caffe2::string;
void TestThroughputWithDB() {
std::unique_ptr<DB> in_db(caffe2::db::CreateDB(
FLAGS_input_db_type, FLAGS_input_db, caffe2::db::READ));
std::unique_ptr<Cursor> cursor(in_db->NewCursor());
for (int iter_id = 0; iter_id < FLAGS_repeat; ++iter_id) {
caffe2::Timer timer;
for (int i = 0; i < FLAGS_report_interval; ++i) {
string key = cursor->key();
string value = cursor->value();
//VLOG(1) << "Key " << key;
cursor->Next();
if (!cursor->Valid()) {
cursor->SeekToFirst();
}
}
double elapsed_seconds = timer.Seconds();
printf(
"Iteration %03d, took %4.5f seconds, throughput %f items/sec.\n",
iter_id,
elapsed_seconds,
FLAGS_report_interval / elapsed_seconds);
}
}
void TestThroughputWithReaderWorker(const DBReader* reader, int thread_id) {
string key, value;
for (int iter_id = 0; iter_id < FLAGS_repeat; ++iter_id) {
caffe2::Timer timer;
for (int i = 0; i < FLAGS_report_interval; ++i) {
reader->Read(&key, &value);
}
double elapsed_seconds = timer.Seconds();
printf(
"Thread %03d iteration %03d, took %4.5f seconds, "
"throughput %f items/sec.\n",
thread_id,
iter_id,
elapsed_seconds,
FLAGS_report_interval / elapsed_seconds);
}
}
void TestThroughputWithReader() {
caffe2::db::DBReader reader(FLAGS_input_db_type, FLAGS_input_db);
std::vector<std::unique_ptr<std::thread>> reading_threads(
FLAGS_num_read_threads);
for (int i = 0; i < reading_threads.size(); ++i) {
reading_threads[i].reset(new std::thread(
TestThroughputWithReaderWorker, &reader, i));
}
for (int i = 0; i < reading_threads.size(); ++i) {
reading_threads[i]->join();
}
}
int main(int argc, char** argv) {
caffe2::GlobalInit(&argc, &argv);
if (FLAGS_use_reader) {
TestThroughputWithReader();
} else {
TestThroughputWithDB();
}
return 0;
}
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