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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#ifndef GFLAGS
#include <cstdio>
int main() {
fprintf(stderr,
"Please install gflags to run block_cache_trace_analyzer_test\n");
return 0;
}
#else
#include <fstream>
#include <iostream>
#include <map>
#include <vector>
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/status.h"
#include "rocksdb/trace_reader_writer.h"
#include "rocksdb/trace_record.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "tools/block_cache_analyzer/block_cache_trace_analyzer.h"
#include "trace_replay/block_cache_tracer.h"
namespace ROCKSDB_NAMESPACE {
namespace {
const uint64_t kBlockSize = 1024;
const std::string kBlockKeyPrefix = "test-block-";
const uint32_t kCFId = 0;
const uint32_t kLevel = 1;
const uint64_t kSSTStoringEvenKeys = 100;
const uint64_t kSSTStoringOddKeys = 101;
const std::string kRefKeyPrefix = "test-get-";
const uint64_t kNumKeysInBlock = 1024;
const int kMaxArgCount = 100;
const size_t kArgBufferSize = 100000;
} // namespace
class BlockCacheTracerTest : public testing::Test {
public:
BlockCacheTracerTest() {
test_path_ = test::PerThreadDBPath("block_cache_trace_analyzer_test");
env_ = ROCKSDB_NAMESPACE::Env::Default();
EXPECT_OK(env_->CreateDir(test_path_));
trace_file_path_ = test_path_ + "/block_cache_trace";
block_cache_sim_config_path_ = test_path_ + "/block_cache_sim_config";
timeline_labels_ =
"block,all,cf,sst,level,bt,caller,cf_sst,cf_level,cf_bt,cf_caller";
reuse_distance_labels_ =
"block,all,cf,sst,level,bt,caller,cf_sst,cf_level,cf_bt,cf_caller";
reuse_distance_buckets_ = "1,1K,1M,1G";
reuse_interval_labels_ = "block,all,cf,sst,level,bt,cf_sst,cf_level,cf_bt";
reuse_interval_buckets_ = "1,10,100,1000";
reuse_lifetime_labels_ = "block,all,cf,sst,level,bt,cf_sst,cf_level,cf_bt";
reuse_lifetime_buckets_ = "1,10,100,1000";
analyzing_callers_ = "Get,Iterator";
access_count_buckets_ = "2,3,4,5,10";
analyze_get_spatial_locality_labels_ = "all";
analyze_get_spatial_locality_buckets_ = "10,20,30,40,50,60,70,80,90,100";
}
~BlockCacheTracerTest() override {
if (getenv("KEEP_DB")) {
printf("The trace file is still at %s\n", trace_file_path_.c_str());
return;
}
EXPECT_OK(env_->DeleteFile(trace_file_path_));
EXPECT_OK(env_->DeleteDir(test_path_));
}
TableReaderCaller GetCaller(uint32_t key_id) {
uint32_t n = key_id % 5;
switch (n) {
case 0:
return TableReaderCaller::kPrefetch;
case 1:
return TableReaderCaller::kCompaction;
case 2:
return TableReaderCaller::kUserGet;
case 3:
return TableReaderCaller::kUserMultiGet;
case 4:
return TableReaderCaller::kUserIterator;
}
// This cannot happend.
assert(false);
return TableReaderCaller::kMaxBlockCacheLookupCaller;
}
void WriteBlockAccess(BlockCacheTraceWriter* writer, uint32_t from_key_id,
TraceType block_type, uint32_t nblocks,
bool is_referenced_key_null = false) {
assert(writer);
for (uint32_t i = 0; i < nblocks; i++) {
uint32_t key_id = from_key_id + i;
uint64_t timestamp = (key_id + 1) * kMicrosInSecond;
BlockCacheTraceRecord record;
record.block_type = block_type;
record.block_size = kBlockSize + key_id;
record.block_key = kBlockKeyPrefix + std::to_string(key_id);
record.access_timestamp = timestamp;
record.cf_id = kCFId;
record.cf_name = kDefaultColumnFamilyName;
record.caller = GetCaller(key_id);
record.level = kLevel;
if (key_id % 2 == 0) {
record.sst_fd_number = kSSTStoringEvenKeys;
} else {
record.sst_fd_number = kSSTStoringOddKeys;
}
record.is_cache_hit = false;
record.no_insert = false;
// Provide these fields for all block types.
// The writer should only write these fields for data blocks and the
// caller is either GET or MGET.
record.referenced_key =
kRefKeyPrefix + std::to_string(key_id) + std::string(8, 0);
record.referenced_key_exist_in_block = true;
if (is_referenced_key_null &&
record.caller == TableReaderCaller::kUserMultiGet) {
record.referenced_key = "";
record.get_from_user_specified_snapshot = true;
}
record.num_keys_in_block = kNumKeysInBlock;
ASSERT_OK(writer->WriteBlockAccess(
record, record.block_key, record.cf_name, record.referenced_key));
}
}
void AssertBlockAccessInfo(
uint32_t key_id, TraceType type,
const std::map<std::string, BlockAccessInfo>& block_access_info_map) {
auto key_id_str = kBlockKeyPrefix + std::to_string(key_id);
ASSERT_TRUE(block_access_info_map.find(key_id_str) !=
block_access_info_map.end());
auto& block_access_info = block_access_info_map.find(key_id_str)->second;
ASSERT_EQ(1, block_access_info.num_accesses);
ASSERT_EQ(kBlockSize + key_id, block_access_info.block_size);
ASSERT_GT(block_access_info.first_access_time, 0);
ASSERT_GT(block_access_info.last_access_time, 0);
ASSERT_EQ(1, block_access_info.caller_num_access_map.size());
TableReaderCaller expected_caller = GetCaller(key_id);
ASSERT_TRUE(block_access_info.caller_num_access_map.find(expected_caller) !=
block_access_info.caller_num_access_map.end());
ASSERT_EQ(
1,
block_access_info.caller_num_access_map.find(expected_caller)->second);
if ((expected_caller == TableReaderCaller::kUserGet ||
expected_caller == TableReaderCaller::kUserMultiGet) &&
type == TraceType::kBlockTraceDataBlock) {
ASSERT_EQ(kNumKeysInBlock, block_access_info.num_keys);
ASSERT_EQ(1, block_access_info.key_num_access_map.size());
ASSERT_EQ(0, block_access_info.non_exist_key_num_access_map.size());
ASSERT_EQ(1, block_access_info.num_referenced_key_exist_in_block);
}
}
void RunBlockCacheTraceAnalyzer() {
std::vector<std::string> params = {
"./block_cache_trace_analyzer",
"-block_cache_trace_path=" + trace_file_path_,
"-block_cache_sim_config_path=" + block_cache_sim_config_path_,
"-block_cache_analysis_result_dir=" + test_path_,
"-print_block_size_stats",
"-print_access_count_stats",
"-print_data_block_access_count_stats",
"-cache_sim_warmup_seconds=0",
"-analyze_bottom_k_access_count_blocks=5",
"-analyze_top_k_access_count_blocks=5",
"-analyze_blocks_reuse_k_reuse_window=5",
"-timeline_labels=" + timeline_labels_,
"-reuse_distance_labels=" + reuse_distance_labels_,
"-reuse_distance_buckets=" + reuse_distance_buckets_,
"-reuse_interval_labels=" + reuse_interval_labels_,
"-reuse_interval_buckets=" + reuse_interval_buckets_,
"-reuse_lifetime_labels=" + reuse_lifetime_labels_,
"-reuse_lifetime_buckets=" + reuse_lifetime_buckets_,
"-analyze_callers=" + analyzing_callers_,
"-access_count_buckets=" + access_count_buckets_,
"-analyze_get_spatial_locality_labels=" +
analyze_get_spatial_locality_labels_,
"-analyze_get_spatial_locality_buckets=" +
analyze_get_spatial_locality_buckets_,
"-analyze_correlation_coefficients_labels=all",
"-skew_labels=all",
"-skew_buckets=10,50,100"};
char arg_buffer[kArgBufferSize];
char* argv[kMaxArgCount];
int argc = 0;
int cursor = 0;
for (const auto& arg : params) {
ASSERT_LE(cursor + arg.size() + 1, kArgBufferSize);
ASSERT_LE(argc + 1, kMaxArgCount);
snprintf(arg_buffer + cursor, arg.size() + 1, "%s", arg.c_str());
argv[argc++] = arg_buffer + cursor;
cursor += static_cast<int>(arg.size()) + 1;
}
ASSERT_EQ(0,
ROCKSDB_NAMESPACE::block_cache_trace_analyzer_tool(argc, argv));
}
Env* env_;
EnvOptions env_options_;
std::string block_cache_sim_config_path_;
std::string trace_file_path_;
std::string test_path_;
std::string timeline_labels_;
std::string reuse_distance_labels_;
std::string reuse_distance_buckets_;
std::string reuse_interval_labels_;
std::string reuse_interval_buckets_;
std::string reuse_lifetime_labels_;
std::string reuse_lifetime_buckets_;
std::string analyzing_callers_;
std::string access_count_buckets_;
std::string analyze_get_spatial_locality_labels_;
std::string analyze_get_spatial_locality_buckets_;
};
TEST_F(BlockCacheTracerTest, BlockCacheAnalyzer) {
{
// Generate a trace file.
BlockCacheTraceWriterOptions trace_writer_opt;
std::unique_ptr<TraceWriter> trace_writer;
ASSERT_OK(NewFileTraceWriter(env_, env_options_, trace_file_path_,
&trace_writer));
const auto& clock = env_->GetSystemClock();
std::unique_ptr<BlockCacheTraceWriter> block_cache_trace_writer =
NewBlockCacheTraceWriter(clock.get(), trace_writer_opt,
std::move(trace_writer));
ASSERT_NE(block_cache_trace_writer, nullptr);
ASSERT_OK(block_cache_trace_writer->WriteHeader());
WriteBlockAccess(block_cache_trace_writer.get(), 0,
TraceType::kBlockTraceDataBlock, 50);
ASSERT_OK(env_->FileExists(trace_file_path_));
}
{
// Generate a cache sim config.
std::string config = "lru,1,0,1K,1M,1G";
std::ofstream out(block_cache_sim_config_path_);
ASSERT_TRUE(out.is_open());
out << config << std::endl;
out.close();
}
RunBlockCacheTraceAnalyzer();
{
// Validate the cache miss ratios.
std::vector<uint64_t> expected_capacities{1024, 1024 * 1024,
1024 * 1024 * 1024};
const std::string mrc_path = test_path_ + "/49_50_mrc";
std::ifstream infile(mrc_path);
uint32_t config_index = 0;
std::string line;
// Read header.
ASSERT_TRUE(getline(infile, line));
while (getline(infile, line)) {
std::stringstream ss(line);
std::vector<std::string> result_strs;
while (ss.good()) {
std::string substr;
getline(ss, substr, ',');
result_strs.push_back(substr);
}
ASSERT_EQ(6, result_strs.size());
ASSERT_LT(config_index, expected_capacities.size());
ASSERT_EQ("lru", result_strs[0]); // cache_name
ASSERT_EQ("1", result_strs[1]); // num_shard_bits
ASSERT_EQ("0", result_strs[2]); // ghost_cache_capacity
ASSERT_EQ(std::to_string(expected_capacities[config_index]),
result_strs[3]); // cache_capacity
ASSERT_EQ("100.0000", result_strs[4]); // miss_ratio
ASSERT_EQ("50", result_strs[5]); // number of accesses.
config_index++;
}
ASSERT_EQ(expected_capacities.size(), config_index);
infile.close();
ASSERT_OK(env_->DeleteFile(mrc_path));
const std::vector<std::string> time_units{"1", "60", "3600"};
expected_capacities.push_back(std::numeric_limits<uint64_t>::max());
for (auto const& expected_capacity : expected_capacities) {
for (auto const& time_unit : time_units) {
const std::string miss_ratio_timeline_path =
test_path_ + "/" + std::to_string(expected_capacity) + "_" +
time_unit + "_miss_ratio_timeline";
std::ifstream mrt_file(miss_ratio_timeline_path);
// Read header.
ASSERT_TRUE(getline(mrt_file, line));
ASSERT_TRUE(getline(mrt_file, line));
std::stringstream ss(line);
bool read_header = false;
while (ss.good()) {
std::string substr;
getline(ss, substr, ',');
if (!read_header) {
if (expected_capacity == std::numeric_limits<uint64_t>::max()) {
ASSERT_EQ("trace", substr);
} else {
ASSERT_EQ("lru-1-0", substr);
}
read_header = true;
continue;
}
ASSERT_DOUBLE_EQ(100.0, ParseDouble(substr));
}
ASSERT_FALSE(getline(mrt_file, line));
mrt_file.close();
ASSERT_OK(env_->DeleteFile(miss_ratio_timeline_path));
}
for (auto const& time_unit : time_units) {
const std::string miss_timeline_path =
test_path_ + "/" + std::to_string(expected_capacity) + "_" +
time_unit + "_miss_timeline";
std::ifstream mt_file(miss_timeline_path);
// Read header.
ASSERT_TRUE(getline(mt_file, line));
ASSERT_TRUE(getline(mt_file, line));
std::stringstream ss(line);
uint32_t num_misses = 0;
while (ss.good()) {
std::string substr;
getline(ss, substr, ',');
if (num_misses == 0) {
if (expected_capacity == std::numeric_limits<uint64_t>::max()) {
ASSERT_EQ("trace", substr);
} else {
ASSERT_EQ("lru-1-0", substr);
}
num_misses++;
continue;
}
num_misses += ParseInt(substr);
}
ASSERT_EQ(51u, num_misses);
ASSERT_FALSE(getline(mt_file, line));
mt_file.close();
ASSERT_OK(env_->DeleteFile(miss_timeline_path));
}
}
}
{
// Validate the skewness csv file.
const std::string skewness_file_path = test_path_ + "/all_skewness";
std::ifstream skew_file(skewness_file_path);
// Read header.
std::string line;
ASSERT_TRUE(getline(skew_file, line));
std::stringstream ss(line);
double sum_percent = 0;
while (getline(skew_file, line)) {
std::stringstream ss_naccess(line);
std::string substr;
bool read_label = false;
while (ss_naccess.good()) {
ASSERT_TRUE(getline(ss_naccess, substr, ','));
if (!read_label) {
read_label = true;
continue;
}
sum_percent += ParseDouble(substr);
}
}
ASSERT_EQ(100.0, sum_percent);
ASSERT_FALSE(getline(skew_file, line));
skew_file.close();
ASSERT_OK(env_->DeleteFile(skewness_file_path));
}
{
// Validate the timeline csv files.
const std::vector<std::string> time_units{"_60", "_3600"};
const std::vector<std::string> user_access_only_flags{"user_access_only_",
"all_access_"};
for (auto const& user_access_only : user_access_only_flags) {
for (auto const& unit : time_units) {
std::stringstream ss(timeline_labels_);
while (ss.good()) {
std::string l;
ASSERT_TRUE(getline(ss, l, ','));
if (l.find("block") == std::string::npos) {
if (user_access_only != "all_access_") {
continue;
}
}
const std::string timeline_file = test_path_ + "/" +
user_access_only + l + unit +
"_access_timeline";
std::ifstream infile(timeline_file);
std::string line;
const uint64_t expected_naccesses = 50;
const uint64_t expected_user_accesses = 30;
ASSERT_TRUE(getline(infile, line)) << timeline_file;
uint32_t naccesses = 0;
while (getline(infile, line)) {
std::stringstream ss_naccess(line);
std::string substr;
bool read_label = false;
while (ss_naccess.good()) {
ASSERT_TRUE(getline(ss_naccess, substr, ','));
if (!read_label) {
read_label = true;
continue;
}
naccesses += ParseUint32(substr);
}
}
if (user_access_only == "user_access_only_") {
ASSERT_EQ(expected_user_accesses, naccesses) << timeline_file;
} else {
ASSERT_EQ(expected_naccesses, naccesses) << timeline_file;
}
ASSERT_OK(env_->DeleteFile(timeline_file));
}
}
}
}
{
// Validate the reuse_interval and reuse_distance csv files.
std::map<std::string, std::string> test_reuse_csv_files;
test_reuse_csv_files["_access_reuse_interval"] = reuse_interval_labels_;
test_reuse_csv_files["_reuse_distance"] = reuse_distance_labels_;
test_reuse_csv_files["_reuse_lifetime"] = reuse_lifetime_labels_;
test_reuse_csv_files["_avg_reuse_interval"] = reuse_interval_labels_;
test_reuse_csv_files["_avg_reuse_interval_naccesses"] =
reuse_interval_labels_;
for (auto const& test : test_reuse_csv_files) {
const std::string& file_suffix = test.first;
const std::string& labels = test.second;
const uint32_t expected_num_rows = 5;
std::stringstream ss(labels);
while (ss.good()) {
std::string l;
ASSERT_TRUE(getline(ss, l, ','));
const std::string reuse_csv_file = test_path_ + "/" + l + file_suffix;
std::ifstream infile(reuse_csv_file);
std::string line;
ASSERT_TRUE(getline(infile, line));
double npercentage = 0;
uint32_t nrows = 0;
while (getline(infile, line)) {
std::stringstream ss_naccess(line);
bool label_read = false;
nrows++;
while (ss_naccess.good()) {
std::string substr;
ASSERT_TRUE(getline(ss_naccess, substr, ','));
if (!label_read) {
label_read = true;
continue;
}
npercentage += ParseDouble(substr);
}
}
ASSERT_EQ(expected_num_rows, nrows);
if ("_reuse_lifetime" == test.first ||
"_avg_reuse_interval" == test.first ||
"_avg_reuse_interval_naccesses" == test.first) {
ASSERT_EQ(100, npercentage) << reuse_csv_file;
} else {
ASSERT_LT(npercentage, 0);
}
ASSERT_OK(env_->DeleteFile(reuse_csv_file));
}
}
}
{
// Validate the percentage of accesses summary.
const std::string percent_access_summary_file =
test_path_ + "/percentage_of_accesses_summary";
std::ifstream infile(percent_access_summary_file);
std::string line;
ASSERT_TRUE(getline(infile, line));
std::set<std::string> callers;
std::set<std::string> expected_callers{"Get", "MultiGet", "Iterator",
"Prefetch", "Compaction"};
while (getline(infile, line)) {
std::stringstream caller_percent(line);
std::string caller;
ASSERT_TRUE(getline(caller_percent, caller, ','));
std::string percent;
ASSERT_TRUE(getline(caller_percent, percent, ','));
ASSERT_FALSE(caller_percent.good());
callers.insert(caller);
ASSERT_EQ(20, ParseDouble(percent));
}
ASSERT_EQ(expected_callers.size(), callers.size());
for (auto caller : callers) {
ASSERT_TRUE(expected_callers.find(caller) != expected_callers.end());
}
ASSERT_OK(env_->DeleteFile(percent_access_summary_file));
}
{
// Validate the percentage of accesses summary by analyzing callers.
std::stringstream analyzing_callers(analyzing_callers_);
while (analyzing_callers.good()) {
std::string caller;
ASSERT_TRUE(getline(analyzing_callers, caller, ','));
std::vector<std::string> breakdowns{"level", "bt"};
for (auto breakdown : breakdowns) {
const std::string file_name = test_path_ + "/" + caller + "_" +
breakdown +
"_percentage_of_accesses_summary";
std::ifstream infile(file_name);
std::string line;
ASSERT_TRUE(getline(infile, line));
double sum = 0;
while (getline(infile, line)) {
std::stringstream label_percent(line);
std::string label;
ASSERT_TRUE(getline(label_percent, label, ','));
std::string percent;
ASSERT_TRUE(getline(label_percent, percent, ','));
ASSERT_FALSE(label_percent.good());
sum += ParseDouble(percent);
}
ASSERT_EQ(100, sum);
ASSERT_OK(env_->DeleteFile(file_name));
}
}
}
const std::vector<std::string> access_types{"user_access_only", "all_access"};
const std::vector<std::string> prefix{"bt", "cf"};
for (auto const& pre : prefix) {
for (auto const& access_type : access_types) {
{
// Validate the access count summary.
const std::string bt_access_count_summary = test_path_ + "/" + pre +
"_" + access_type +
"_access_count_summary";
std::ifstream infile(bt_access_count_summary);
std::string line;
ASSERT_TRUE(getline(infile, line));
double sum_percent = 0;
while (getline(infile, line)) {
std::stringstream bt_percent(line);
std::string bt;
ASSERT_TRUE(getline(bt_percent, bt, ','));
std::string percent;
ASSERT_TRUE(getline(bt_percent, percent, ','));
sum_percent += ParseDouble(percent);
}
ASSERT_EQ(100.0, sum_percent);
ASSERT_OK(env_->DeleteFile(bt_access_count_summary));
}
}
}
for (auto const& access_type : access_types) {
std::vector<std::string> block_types{"Index", "Data", "Filter"};
for (auto block_type : block_types) {
// Validate reuse block timeline.
const std::string reuse_blocks_timeline = test_path_ + "/" + block_type +
"_" + access_type +
"_5_reuse_blocks_timeline";
std::ifstream infile(reuse_blocks_timeline);
std::string line;
ASSERT_TRUE(getline(infile, line)) << reuse_blocks_timeline;
uint32_t index = 0;
while (getline(infile, line)) {
std::stringstream timeline(line);
bool start_time = false;
double sum = 0;
while (timeline.good()) {
std::string value;
ASSERT_TRUE(getline(timeline, value, ','));
if (!start_time) {
start_time = true;
continue;
}
sum += ParseDouble(value);
}
index++;
ASSERT_LT(sum, 100.0 * index + 1) << reuse_blocks_timeline;
}
ASSERT_OK(env_->DeleteFile(reuse_blocks_timeline));
}
}
std::stringstream ss(analyze_get_spatial_locality_labels_);
while (ss.good()) {
std::string l;
ASSERT_TRUE(getline(ss, l, ','));
const std::vector<std::string> spatial_locality_files{
"_percent_ref_keys", "_percent_accesses_on_ref_keys",
"_percent_data_size_on_ref_keys"};
for (auto const& spatial_locality_file : spatial_locality_files) {
const std::string filename = test_path_ + "/" + l + spatial_locality_file;
std::ifstream infile(filename);
std::string line;
ASSERT_TRUE(getline(infile, line));
double sum_percent = 0;
uint32_t nrows = 0;
while (getline(infile, line)) {
std::stringstream bt_percent(line);
std::string bt;
ASSERT_TRUE(getline(bt_percent, bt, ','));
std::string percent;
ASSERT_TRUE(getline(bt_percent, percent, ','));
sum_percent += ParseDouble(percent);
nrows++;
}
ASSERT_EQ(11u, nrows);
ASSERT_EQ(100.0, sum_percent);
ASSERT_OK(env_->DeleteFile(filename));
}
}
ASSERT_OK(env_->DeleteFile(block_cache_sim_config_path_));
}
TEST_F(BlockCacheTracerTest, MixedBlocks) {
{
// Generate a trace file containing a mix of blocks.
// It contains two SST files with 25 blocks of odd numbered block_key in
// kSSTStoringOddKeys and 25 blocks of even numbered blocks_key in
// kSSTStoringEvenKeys.
BlockCacheTraceWriterOptions trace_writer_opt;
std::unique_ptr<TraceWriter> trace_writer;
const auto& clock = env_->GetSystemClock();
ASSERT_OK(NewFileTraceWriter(env_, env_options_, trace_file_path_,
&trace_writer));
std::unique_ptr<BlockCacheTraceWriter> block_cache_trace_writer =
NewBlockCacheTraceWriter(clock.get(), trace_writer_opt,
std::move(trace_writer));
ASSERT_NE(block_cache_trace_writer, nullptr);
ASSERT_OK(block_cache_trace_writer->WriteHeader());
// Write blocks of different types.
WriteBlockAccess(block_cache_trace_writer.get(), 0,
TraceType::kBlockTraceUncompressionDictBlock, 10);
WriteBlockAccess(block_cache_trace_writer.get(), 10,
TraceType::kBlockTraceDataBlock, 10);
WriteBlockAccess(block_cache_trace_writer.get(), 20,
TraceType::kBlockTraceFilterBlock, 10);
WriteBlockAccess(block_cache_trace_writer.get(), 30,
TraceType::kBlockTraceIndexBlock, 10);
WriteBlockAccess(block_cache_trace_writer.get(), 40,
TraceType::kBlockTraceRangeDeletionBlock, 10);
ASSERT_OK(env_->FileExists(trace_file_path_));
}
{
// Verify trace file is generated correctly.
std::unique_ptr<TraceReader> trace_reader;
ASSERT_OK(NewFileTraceReader(env_, env_options_, trace_file_path_,
&trace_reader));
BlockCacheTraceReader reader(std::move(trace_reader));
BlockCacheTraceHeader header;
ASSERT_OK(reader.ReadHeader(&header));
ASSERT_EQ(static_cast<uint32_t>(kMajorVersion),
header.rocksdb_major_version);
ASSERT_EQ(static_cast<uint32_t>(kMinorVersion),
header.rocksdb_minor_version);
// Read blocks.
BlockCacheTraceAnalyzer analyzer(
trace_file_path_,
/*output_miss_ratio_curve_path=*/"",
/*human_readable_trace_file_path=*/"",
/*compute_reuse_distance=*/true,
/*mrc_only=*/false,
/*is_block_cache_human_readable_trace=*/false,
/*simulator=*/nullptr);
// The analyzer ends when it detects an incomplete access record.
ASSERT_EQ(Status::Incomplete(""), analyzer.Analyze());
const uint64_t expected_num_cfs = 1;
std::vector<uint64_t> expected_fds{kSSTStoringOddKeys, kSSTStoringEvenKeys};
const std::vector<TraceType> expected_types{
TraceType::kBlockTraceUncompressionDictBlock,
TraceType::kBlockTraceDataBlock, TraceType::kBlockTraceFilterBlock,
TraceType::kBlockTraceIndexBlock,
TraceType::kBlockTraceRangeDeletionBlock};
const uint64_t expected_num_keys_per_type = 5;
auto& stats = analyzer.TEST_cf_aggregates_map();
ASSERT_EQ(expected_num_cfs, stats.size());
ASSERT_TRUE(stats.find(kDefaultColumnFamilyName) != stats.end());
auto& cf_stats = stats.find(kDefaultColumnFamilyName)->second;
ASSERT_EQ(expected_fds.size(), cf_stats.fd_aggregates_map.size());
for (auto fd_id : expected_fds) {
ASSERT_TRUE(cf_stats.fd_aggregates_map.find(fd_id) !=
cf_stats.fd_aggregates_map.end());
ASSERT_EQ(kLevel, cf_stats.fd_aggregates_map.find(fd_id)->second.level);
auto& block_type_aggregates_map = cf_stats.fd_aggregates_map.find(fd_id)
->second.block_type_aggregates_map;
ASSERT_EQ(expected_types.size(), block_type_aggregates_map.size());
uint32_t key_id = 0;
for (auto type : expected_types) {
ASSERT_TRUE(block_type_aggregates_map.find(type) !=
block_type_aggregates_map.end());
auto& block_access_info_map =
block_type_aggregates_map.find(type)->second.block_access_info_map;
// Each block type has 5 blocks.
ASSERT_EQ(expected_num_keys_per_type, block_access_info_map.size());
for (uint32_t i = 0; i < 10; i++) {
// Verify that odd numbered blocks are stored in kSSTStoringOddKeys
// and even numbered blocks are stored in kSSTStoringEvenKeys.
auto key_id_str = kBlockKeyPrefix + std::to_string(key_id);
if (fd_id == kSSTStoringOddKeys) {
if (key_id % 2 == 1) {
AssertBlockAccessInfo(key_id, type, block_access_info_map);
} else {
ASSERT_TRUE(block_access_info_map.find(key_id_str) ==
block_access_info_map.end());
}
} else {
if (key_id % 2 == 1) {
ASSERT_TRUE(block_access_info_map.find(key_id_str) ==
block_access_info_map.end());
} else {
AssertBlockAccessInfo(key_id, type, block_access_info_map);
}
}
key_id++;
}
}
}
}
}
TEST_F(BlockCacheTracerTest, MultiGetWithNullReferenceKey) {
{
// Generate a trace file containing MultiGet records with reference key
// being 0.
BlockCacheTraceWriterOptions trace_writer_opt;
std::unique_ptr<TraceWriter> trace_writer;
const auto& clock = env_->GetSystemClock();
ASSERT_OK(NewFileTraceWriter(env_, env_options_, trace_file_path_,
&trace_writer));
std::unique_ptr<BlockCacheTraceWriter> block_cache_trace_writer =
NewBlockCacheTraceWriter(clock.get(), trace_writer_opt,
std::move(trace_writer));
ASSERT_NE(block_cache_trace_writer, nullptr);
ASSERT_OK(block_cache_trace_writer->WriteHeader());
// Write blocks of different types.
WriteBlockAccess(block_cache_trace_writer.get(), 0,
TraceType::kBlockTraceUncompressionDictBlock, 10, true);
WriteBlockAccess(block_cache_trace_writer.get(), 10,
TraceType::kBlockTraceDataBlock, 10, true);
WriteBlockAccess(block_cache_trace_writer.get(), 20,
TraceType::kBlockTraceFilterBlock, 10, true);
WriteBlockAccess(block_cache_trace_writer.get(), 30,
TraceType::kBlockTraceIndexBlock, 10, true);
WriteBlockAccess(block_cache_trace_writer.get(), 40,
TraceType::kBlockTraceRangeDeletionBlock, 10, true);
ASSERT_OK(env_->FileExists(trace_file_path_));
}
{
// Verify trace file is generated correctly.
std::unique_ptr<TraceReader> trace_reader;
ASSERT_OK(NewFileTraceReader(env_, env_options_, trace_file_path_,
&trace_reader));
BlockCacheTraceReader reader(std::move(trace_reader));
BlockCacheTraceHeader header;
ASSERT_OK(reader.ReadHeader(&header));
ASSERT_EQ(static_cast<uint32_t>(kMajorVersion),
header.rocksdb_major_version);
ASSERT_EQ(static_cast<uint32_t>(kMinorVersion),
header.rocksdb_minor_version);
std::string human_readable_trace_file_path =
test_path_ + "/readable_block_cache_trace";
// Read blocks.
BlockCacheTraceAnalyzer analyzer(
trace_file_path_,
/*output_dir=*/"",
/*human_readable_trace_file_path=*/human_readable_trace_file_path,
/*compute_reuse_distance=*/true,
/*mrc_only=*/false,
/*is_human_readable_trace_file=*/false,
/*cache_simulator=*/nullptr);
// The analyzer ends when it detects an incomplete access record.
ASSERT_EQ(Status::Incomplete(""), analyzer.Analyze());
ASSERT_OK(env_->DeleteFile(human_readable_trace_file_path));
}
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#endif // GFLAG