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/**
* Copyright (C) 2020-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include <benchmark/benchmark.h>
#include <forward_list>
#include "mongo/util/cancelation.h"
namespace mongo {
void BM_create_single_token_from_source(benchmark::State& state) {
CancelationSource source;
for (auto _ : state) {
benchmark::DoNotOptimize(source.token());
}
}
void BM_uncancelable_token_ctor(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(CancelationToken::uncancelable());
}
}
void BM_cancel_tokens_from_single_source(benchmark::State& state) {
for (auto _ : state) {
state.PauseTiming(); // Do not time the construction and set-up of the source + tokens.
CancelationSource source;
for (int i = 0; i < state.range(0); ++i) {
source.token().onCancel().unsafeToInlineFuture().getAsync([](auto) {});
}
state.ResumeTiming();
source.cancel();
}
}
void BM_check_if_token_from_source_canceled(benchmark::State& state) {
CancelationSource source;
auto token = source.token();
for (auto _ : state) {
benchmark::DoNotOptimize(token.isCanceled());
}
}
void BM_cancelation_source_from_token_ctor(benchmark::State& state) {
CancelationSource source;
for (auto _ : state) {
CancelationSource child(source.token());
benchmark::DoNotOptimize(child);
}
}
void BM_cancelation_source_default_ctor(benchmark::State& state) {
for (auto _ : state) {
CancelationSource source;
benchmark::DoNotOptimize(source);
}
}
/**
* Constructs a cancelation 'hierarchy' of depth state.range(0), with one cancelation source at
* each level and one token obtained from each source. When root.cancel() is called, the whole
* hierarchy (all sources in the hierarchy, and any tokens obtained from any source in the
* hierarchy) will be canceled.
*/
void BM_ranged_depth_cancelation_hierarchy(benchmark::State& state) {
for (auto _ : state) {
state.PauseTiming();
CancelationSource root;
CancelationSource parent = root;
// We use list to keep every cancelation source in the hierarchy in scope.
std::forward_list<CancelationSource> list;
for (int i = 0; i < state.range(0); ++i) {
list.push_front(parent);
CancelationSource child(parent.token());
child.token().onCancel().unsafeToInlineFuture().getAsync([](auto) {});
parent = child;
}
state.ResumeTiming();
root.cancel();
}
}
BENCHMARK(BM_create_single_token_from_source);
BENCHMARK(BM_uncancelable_token_ctor);
BENCHMARK(BM_cancel_tokens_from_single_source)->RangeMultiplier(10)->Range(1, 100 * 100 * 100);
BENCHMARK(BM_check_if_token_from_source_canceled);
BENCHMARK(BM_cancelation_source_from_token_ctor);
BENCHMARK(BM_cancelation_source_default_ctor);
BENCHMARK(BM_ranged_depth_cancelation_hierarchy)->RangeMultiplier(10)->Range(1, 1000);
} // namespace mongo
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