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Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/utilities/simulator_cache/sim_cache_test.cc | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/rocksdb/utilities/simulator_cache/sim_cache_test.cc b/src/rocksdb/utilities/simulator_cache/sim_cache_test.cc new file mode 100644 index 000000000..6cb495813 --- /dev/null +++ b/src/rocksdb/utilities/simulator_cache/sim_cache_test.cc @@ -0,0 +1,225 @@ +// 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). + +#include "rocksdb/utilities/sim_cache.h" +#include <cstdlib> +#include "db/db_test_util.h" +#include "port/stack_trace.h" + +namespace ROCKSDB_NAMESPACE { + +class SimCacheTest : public DBTestBase { + private: + size_t miss_count_ = 0; + size_t hit_count_ = 0; + size_t insert_count_ = 0; + size_t failure_count_ = 0; + + public: + const size_t kNumBlocks = 5; + const size_t kValueSize = 1000; + + SimCacheTest() : DBTestBase("/sim_cache_test") {} + + BlockBasedTableOptions GetTableOptions() { + BlockBasedTableOptions table_options; + // Set a small enough block size so that each key-value get its own block. + table_options.block_size = 1; + return table_options; + } + + Options GetOptions(const BlockBasedTableOptions& table_options) { + Options options = CurrentOptions(); + options.create_if_missing = true; + // options.compression = kNoCompression; + options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics(); + options.table_factory.reset(new BlockBasedTableFactory(table_options)); + return options; + } + + void InitTable(const Options& /*options*/) { + std::string value(kValueSize, 'a'); + for (size_t i = 0; i < kNumBlocks * 2; i++) { + ASSERT_OK(Put(ToString(i), value.c_str())); + } + } + + void RecordCacheCounters(const Options& options) { + miss_count_ = TestGetTickerCount(options, BLOCK_CACHE_MISS); + hit_count_ = TestGetTickerCount(options, BLOCK_CACHE_HIT); + insert_count_ = TestGetTickerCount(options, BLOCK_CACHE_ADD); + failure_count_ = TestGetTickerCount(options, BLOCK_CACHE_ADD_FAILURES); + } + + void CheckCacheCounters(const Options& options, size_t expected_misses, + size_t expected_hits, size_t expected_inserts, + size_t expected_failures) { + size_t new_miss_count = TestGetTickerCount(options, BLOCK_CACHE_MISS); + size_t new_hit_count = TestGetTickerCount(options, BLOCK_CACHE_HIT); + size_t new_insert_count = TestGetTickerCount(options, BLOCK_CACHE_ADD); + size_t new_failure_count = + TestGetTickerCount(options, BLOCK_CACHE_ADD_FAILURES); + ASSERT_EQ(miss_count_ + expected_misses, new_miss_count); + ASSERT_EQ(hit_count_ + expected_hits, new_hit_count); + ASSERT_EQ(insert_count_ + expected_inserts, new_insert_count); + ASSERT_EQ(failure_count_ + expected_failures, new_failure_count); + miss_count_ = new_miss_count; + hit_count_ = new_hit_count; + insert_count_ = new_insert_count; + failure_count_ = new_failure_count; + } +}; + +TEST_F(SimCacheTest, SimCache) { + ReadOptions read_options; + auto table_options = GetTableOptions(); + auto options = GetOptions(table_options); + InitTable(options); + LRUCacheOptions co; + co.capacity = 0; + co.num_shard_bits = 0; + co.strict_capacity_limit = false; + co.metadata_charge_policy = kDontChargeCacheMetadata; + std::shared_ptr<SimCache> simCache = NewSimCache(NewLRUCache(co), 20000, 0); + table_options.block_cache = simCache; + options.table_factory.reset(new BlockBasedTableFactory(table_options)); + Reopen(options); + RecordCacheCounters(options); + + std::vector<std::unique_ptr<Iterator>> iterators(kNumBlocks); + Iterator* iter = nullptr; + + // Load blocks into cache. + for (size_t i = 0; i < kNumBlocks; i++) { + iter = db_->NewIterator(read_options); + iter->Seek(ToString(i)); + ASSERT_OK(iter->status()); + CheckCacheCounters(options, 1, 0, 1, 0); + iterators[i].reset(iter); + } + ASSERT_EQ(kNumBlocks, + simCache->get_hit_counter() + simCache->get_miss_counter()); + ASSERT_EQ(0, simCache->get_hit_counter()); + size_t usage = simCache->GetUsage(); + ASSERT_LT(0, usage); + ASSERT_EQ(usage, simCache->GetSimUsage()); + simCache->SetCapacity(usage); + ASSERT_EQ(usage, simCache->GetPinnedUsage()); + + // Test with strict capacity limit. + simCache->SetStrictCapacityLimit(true); + iter = db_->NewIterator(read_options); + iter->Seek(ToString(kNumBlocks * 2 - 1)); + ASSERT_TRUE(iter->status().IsIncomplete()); + CheckCacheCounters(options, 1, 0, 0, 1); + delete iter; + iter = nullptr; + + // Release iterators and access cache again. + for (size_t i = 0; i < kNumBlocks; i++) { + iterators[i].reset(); + CheckCacheCounters(options, 0, 0, 0, 0); + } + // Add kNumBlocks again + for (size_t i = 0; i < kNumBlocks; i++) { + std::unique_ptr<Iterator> it(db_->NewIterator(read_options)); + it->Seek(ToString(i)); + ASSERT_OK(it->status()); + CheckCacheCounters(options, 0, 1, 0, 0); + } + ASSERT_EQ(5, simCache->get_hit_counter()); + for (size_t i = kNumBlocks; i < kNumBlocks * 2; i++) { + std::unique_ptr<Iterator> it(db_->NewIterator(read_options)); + it->Seek(ToString(i)); + ASSERT_OK(it->status()); + CheckCacheCounters(options, 1, 0, 1, 0); + } + ASSERT_EQ(0, simCache->GetPinnedUsage()); + ASSERT_EQ(3 * kNumBlocks + 1, + simCache->get_hit_counter() + simCache->get_miss_counter()); + ASSERT_EQ(6, simCache->get_hit_counter()); +} + +TEST_F(SimCacheTest, SimCacheLogging) { + auto table_options = GetTableOptions(); + auto options = GetOptions(table_options); + options.disable_auto_compactions = true; + LRUCacheOptions co; + co.capacity = 1024 * 1024; + co.metadata_charge_policy = kDontChargeCacheMetadata; + std::shared_ptr<SimCache> sim_cache = NewSimCache(NewLRUCache(co), 20000, 0); + table_options.block_cache = sim_cache; + options.table_factory.reset(new BlockBasedTableFactory(table_options)); + Reopen(options); + + int num_block_entries = 20; + for (int i = 0; i < num_block_entries; i++) { + Put(Key(i), "val"); + Flush(); + } + + std::string log_file = test::PerThreadDBPath(env_, "cache_log.txt"); + ASSERT_OK(sim_cache->StartActivityLogging(log_file, env_)); + for (int i = 0; i < num_block_entries; i++) { + ASSERT_EQ(Get(Key(i)), "val"); + } + for (int i = 0; i < num_block_entries; i++) { + ASSERT_EQ(Get(Key(i)), "val"); + } + sim_cache->StopActivityLogging(); + ASSERT_OK(sim_cache->GetActivityLoggingStatus()); + + std::string file_contents = ""; + ReadFileToString(env_, log_file, &file_contents); + + int lookup_num = 0; + int add_num = 0; + std::string::size_type pos; + + // count number of lookups + pos = 0; + while ((pos = file_contents.find("LOOKUP -", pos)) != std::string::npos) { + ++lookup_num; + pos += 1; + } + + // count number of additions + pos = 0; + while ((pos = file_contents.find("ADD -", pos)) != std::string::npos) { + ++add_num; + pos += 1; + } + + // We asked for every block twice + ASSERT_EQ(lookup_num, num_block_entries * 2); + + // We added every block only once, since the cache can hold all blocks + ASSERT_EQ(add_num, num_block_entries); + + // Log things again but stop logging automatically after reaching 512 bytes + // @lint-ignore TXT2 T25377293 Grandfathered in + int max_size = 512; + ASSERT_OK(sim_cache->StartActivityLogging(log_file, env_, max_size)); + for (int it = 0; it < 10; it++) { + for (int i = 0; i < num_block_entries; i++) { + ASSERT_EQ(Get(Key(i)), "val"); + } + } + ASSERT_OK(sim_cache->GetActivityLoggingStatus()); + + uint64_t fsize = 0; + ASSERT_OK(env_->GetFileSize(log_file, &fsize)); + // error margin of 100 bytes + ASSERT_LT(fsize, max_size + 100); + ASSERT_GT(fsize, max_size - 100); +} + +} // namespace ROCKSDB_NAMESPACE + +int main(int argc, char** argv) { + ROCKSDB_NAMESPACE::port::InstallStackTraceHandler(); + ::testing::InitGoogleTest(&argc, argv); + return RUN_ALL_TESTS(); +} |