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169 regels
5.4 KiB
169 regels
5.4 KiB
#include <iostream>
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#include <gtest/gtest.h>
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#include <chrono>
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#include <vector>
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#include "leveldb/env.h"
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#include "leveldb/db.h"
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#include "db/fields.h"
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#include "leveldb/write_batch.h"
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using namespace leveldb;
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// Number of key/values to operate in database
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constexpr int num_ = 500000;
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// Size of each value
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constexpr int value_size_ = 1024;
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// Number of read operations
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constexpr int reads_ = 500000;
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Status OpenDB(std::string dbName, DB **db) {
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Options options;
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options.create_if_missing = true;
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return DB::Open(options, dbName, db);
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}
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void InsertData(DB *db, std::vector<int64_t> &lats) {
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WriteOptions writeOptions;
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srand(0);
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for (int i = 0; i < num_; ++i) {
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int key_ = rand() % num_ + 1;
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std::string key = std::to_string(key_);
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std::string value(value_size_, 'a');
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auto start_time = std::chrono::steady_clock::now();
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db->Put(writeOptions, key, value);
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auto end_time = std::chrono::steady_clock::now();
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lats.emplace_back(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count());
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}
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}
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void InsertFields(DB *db, std::vector<int64_t> &lats) {
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WriteOptions writeOptions;
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srand(0);
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for (int i = 0; i < num_; ++i) {
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int key_ = rand() % num_ + 1;
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std::string key = std::to_string(key_);
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FieldArray fields = {{"field", "old_value_"}};
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Fields f(fields);
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auto start_time = std::chrono::steady_clock::now();
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db->PutFields(writeOptions, Slice(key), f);
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auto end_time = std::chrono::steady_clock::now();
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lats.emplace_back(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count());
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}
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}
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void GetData(DB *db, std::vector<int64_t> &lats) {
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ReadOptions readOptions;
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srand(0);
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for (int i = 0; i < reads_; ++i) {
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int key_ = rand() % num_ + 1;
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std::string key = std::to_string(key_);
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std::string value;
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auto start_time = std::chrono::steady_clock::now();
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db->Get(readOptions, key, &value);
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auto end_time = std::chrono::steady_clock::now();
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lats.emplace_back(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count());
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}
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}
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void ReadOrdered(DB *db, std::vector<int64_t> &lats) {
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Iterator* iter = db->NewIterator(ReadOptions());
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int i = 0;
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for (iter->SeekToFirst(); i < reads_ && iter->Valid(); iter->Next()) {
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++i;
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auto start_time = std::chrono::steady_clock::now();
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// Just iterating over the data without performing any operation.
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auto end_time = std::chrono::steady_clock::now();
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lats.emplace_back(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count());
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}
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delete iter;
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}
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void FindKeys(DB *db, std::vector<int64_t> &lats) {
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srand(0);
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for (int i = 0; i < reads_; ++i) {
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int key_ = rand() % num_ + 1;
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FieldArray fields_to_find = {{"field", "old_value_" }};
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auto start_time = std::chrono::steady_clock::now();
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std::string dbname_ = "bench_resr_db";
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Options options;
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options.create_if_missing = true;
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DBImpl* impl = new DBImpl(options, dbname_);
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Fields::FindKeysByFields(db, fields_to_find, impl);
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auto end_time = std::chrono::steady_clock::now();
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lats.emplace_back(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count());
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}
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}
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double CalculatePercentile(const std::vector<int64_t>& latencies, double percentile) {
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if (latencies.empty()) return 0.0;
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std::vector<int64_t> sorted_latencies = latencies;
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std::sort(sorted_latencies.begin(), sorted_latencies.end());
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size_t index = static_cast<size_t>(percentile * sorted_latencies.size());
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if (index >= sorted_latencies.size()) index = sorted_latencies.size() - 1;
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return sorted_latencies[index];
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}
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void SetupData(DB *db) {
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std::vector<int64_t> lats;
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InsertData(db, lats);
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}
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void SetupFields(DB *db) {
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std::vector<int64_t> lats;
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InsertFields(db, lats);
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}
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template<typename Func>
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void RunBenchmark(const char* name, Func func, bool setup_data = true, bool setup_fields = false) {
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DB *db;
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std::string rm_command = "rm -rf testdb_bench";
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system(rm_command.c_str());
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if (!OpenDB("testdb_bench", &db).ok()) {
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std::cerr << "open db failed" << std::endl;
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abort();
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}
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if (setup_data) SetupData(db);
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if (setup_fields) SetupFields(db);
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std::vector<int64_t> lats;
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auto start_time = std::chrono::steady_clock::now();
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func(db, lats);
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auto end_time = std::chrono::steady_clock::now();
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auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end_time - start_time).count();
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double avg = 0.0;
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for (auto latency : lats) {
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avg += latency;
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}
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avg /= lats.size();
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double p75 = CalculatePercentile(lats, 0.75);
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double p99 = CalculatePercentile(lats, 0.99);
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std::cout << name << " Latency (avg, P75, P99): " << avg << " micros/op, " << p75 << " micros/op, " << p99 << " micros/op" << std::endl;
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std::cout << name << " Throughput: " << lats.size() / duration << " ops/ms" << std::endl;
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delete db;
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}
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TEST(BenchTest, PutLatency) { RunBenchmark("Put", InsertData, false, false); }
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TEST(BenchTest, PutFieldsLatency) { RunBenchmark("PutFields", InsertFields, false, false); }
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TEST(BenchTest, GetLatency) { RunBenchmark("Get", GetData, true, false); }
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TEST(BenchTest, IteratorLatency) { RunBenchmark("Iterator", ReadOrdered, true, false); }
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TEST(BenchTest, FindKeysByFieldLatency) {
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RunBenchmark("FindKeysByFields", FindKeys, false, true);
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}
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int main(int argc, char **argv) {
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testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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