3018a3e27e
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/9139 Reviewed By: zhichao-cao Differential Revision: D32211415 Pulled By: hx235 fbshipit-source-id: 39ce036ba34e1fb4a1992a33ac6904a4a943301d
418 lines
18 KiB
C++
418 lines
18 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "cache/cache_reservation_manager.h"
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#include <cstddef>
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#include <cstring>
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#include <memory>
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#include "cache/cache_entry_roles.h"
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#include "rocksdb/cache.h"
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#include "rocksdb/slice.h"
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#include "table/block_based/block_based_table_reader.h"
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#include "test_util/testharness.h"
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#include "util/coding.h"
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namespace ROCKSDB_NAMESPACE {
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class CacheReservationManagerTest : public ::testing::Test {
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protected:
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static constexpr std::size_t kSizeDummyEntry =
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CacheReservationManager::GetDummyEntrySize();
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static constexpr std::size_t kCacheCapacity = 4096 * kSizeDummyEntry;
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static constexpr int kNumShardBits = 0; // 2^0 shard
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static const std::size_t kCacheKeyPrefixSize =
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BlockBasedTable::kMaxCacheKeyPrefixSize + kMaxVarint64Length;
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static constexpr std::size_t kMetaDataChargeOverhead = 10000;
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std::shared_ptr<Cache> cache = NewLRUCache(kCacheCapacity, kNumShardBits);
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std::unique_ptr<CacheReservationManager> test_cache_rev_mng;
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CacheReservationManagerTest() {
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test_cache_rev_mng.reset(new CacheReservationManager(cache));
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}
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};
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TEST_F(CacheReservationManagerTest, GenerateCacheKey) {
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// The first cache reservation manager owning the cache will have
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// cache->NewId() = 1
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constexpr std::size_t kCacheNewId = 1;
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// The first key generated inside of cache reservation manager will have
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// next_cache_key_id = 0
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constexpr std::size_t kCacheKeyId = 0;
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char expected_cache_key[kCacheKeyPrefixSize + kMaxVarint64Length];
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std::memset(expected_cache_key, 0, kCacheKeyPrefixSize + kMaxVarint64Length);
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EncodeVarint64(expected_cache_key, kCacheNewId);
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char* end =
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EncodeVarint64(expected_cache_key + kCacheKeyPrefixSize, kCacheKeyId);
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Slice expected_cache_key_slice(
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expected_cache_key, static_cast<std::size_t>(end - expected_cache_key));
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std::size_t new_mem_used = 1 * kSizeDummyEntry;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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ASSERT_EQ(s, Status::OK());
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ASSERT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry);
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ASSERT_LT(cache->GetPinnedUsage(),
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1 * kSizeDummyEntry + kMetaDataChargeOverhead);
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Cache::Handle* handle = cache->Lookup(expected_cache_key_slice);
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EXPECT_NE(handle, nullptr)
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<< "Failed to generate the cache key for the dummy entry correctly";
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// Clean up the returned handle from Lookup() to prevent memory leak
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cache->Release(handle);
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}
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TEST_F(CacheReservationManagerTest, KeepCacheReservationTheSame) {
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std::size_t new_mem_used = 1 * kSizeDummyEntry;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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ASSERT_EQ(s, Status::OK());
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ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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1 * kSizeDummyEntry);
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std::size_t initial_pinned_usage = cache->GetPinnedUsage();
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ASSERT_GE(initial_pinned_usage, 1 * kSizeDummyEntry);
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ASSERT_LT(initial_pinned_usage,
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1 * kSizeDummyEntry + kMetaDataChargeOverhead);
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to keep cache reservation the same when new_mem_used equals "
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"to current cache reservation";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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1 * kSizeDummyEntry)
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<< "Failed to bookkeep correctly when new_mem_used equals to current "
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"cache reservation";
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EXPECT_EQ(cache->GetPinnedUsage(), initial_pinned_usage)
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<< "Failed to keep underlying dummy entries the same when new_mem_used "
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"equals to current cache reservation";
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}
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TEST_F(CacheReservationManagerTest,
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IncreaseCacheReservationByMultiplesOfDummyEntrySize) {
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std::size_t new_mem_used = 2 * kSizeDummyEntry;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to increase cache reservation correctly";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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2 * kSizeDummyEntry)
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<< "Failed to bookkeep cache reservation increase correctly";
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EXPECT_GE(cache->GetPinnedUsage(), 2 * kSizeDummyEntry)
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<< "Failed to increase underlying dummy entries in cache correctly";
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EXPECT_LT(cache->GetPinnedUsage(),
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2 * kSizeDummyEntry + kMetaDataChargeOverhead)
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<< "Failed to increase underlying dummy entries in cache correctly";
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}
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TEST_F(CacheReservationManagerTest,
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IncreaseCacheReservationNotByMultiplesOfDummyEntrySize) {
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std::size_t new_mem_used = 2 * kSizeDummyEntry + kSizeDummyEntry / 2;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to increase cache reservation correctly";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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3 * kSizeDummyEntry)
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<< "Failed to bookkeep cache reservation increase correctly";
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EXPECT_GE(cache->GetPinnedUsage(), 3 * kSizeDummyEntry)
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<< "Failed to increase underlying dummy entries in cache correctly";
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EXPECT_LT(cache->GetPinnedUsage(),
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3 * kSizeDummyEntry + kMetaDataChargeOverhead)
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<< "Failed to increase underlying dummy entries in cache correctly";
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}
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TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,
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IncreaseCacheReservationOnFullCache) {
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;
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constexpr std::size_t kSizeDummyEntry =
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CacheReservationManager::GetDummyEntrySize();
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constexpr std::size_t kSmallCacheCapacity = 4 * kSizeDummyEntry;
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constexpr std::size_t kBigCacheCapacity = 4096 * kSizeDummyEntry;
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constexpr std::size_t kMetaDataChargeOverhead = 10000;
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LRUCacheOptions lo;
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lo.capacity = kSmallCacheCapacity;
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lo.num_shard_bits = 0; // 2^0 shard
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lo.strict_capacity_limit = true;
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std::shared_ptr<Cache> cache = NewLRUCache(lo);
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std::unique_ptr<CacheReservationManager> test_cache_rev_mng(
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new CacheReservationManager(cache));
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std::size_t new_mem_used = kSmallCacheCapacity + 1;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::Incomplete())
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<< "Failed to return status to indicate failure of dummy entry insertion "
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"during cache reservation on full cache";
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EXPECT_GE(test_cache_rev_mng->GetTotalReservedCacheSize(),
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1 * kSizeDummyEntry)
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<< "Failed to bookkeep correctly before cache resevation failure happens "
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"due to full cache";
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EXPECT_LE(test_cache_rev_mng->GetTotalReservedCacheSize(),
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kSmallCacheCapacity)
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<< "Failed to bookkeep correctly (i.e, bookkeep only successful dummy "
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"entry insertions) when encountering cache resevation failure due to "
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"full cache";
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EXPECT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry)
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<< "Failed to insert underlying dummy entries correctly when "
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"encountering cache resevation failure due to full cache";
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EXPECT_LE(cache->GetPinnedUsage(), kSmallCacheCapacity)
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<< "Failed to insert underlying dummy entries correctly when "
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"encountering cache resevation failure due to full cache";
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new_mem_used = kSmallCacheCapacity / 2; // 2 dummy entries
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to decrease cache reservation after encountering cache "
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"reservation failure due to full cache";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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2 * kSizeDummyEntry)
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<< "Failed to bookkeep cache reservation decrease correctly after "
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"encountering cache reservation due to full cache";
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EXPECT_GE(cache->GetPinnedUsage(), 2 * kSizeDummyEntry)
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<< "Failed to release underlying dummy entries correctly on cache "
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"reservation decrease after encountering cache resevation failure due "
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"to full cache";
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EXPECT_LT(cache->GetPinnedUsage(),
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2 * kSizeDummyEntry + kMetaDataChargeOverhead)
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<< "Failed to release underlying dummy entries correctly on cache "
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"reservation decrease after encountering cache resevation failure due "
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"to full cache";
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// Create cache full again for subsequent tests
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new_mem_used = kSmallCacheCapacity + 1;
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::Incomplete())
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<< "Failed to return status to indicate failure of dummy entry insertion "
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"during cache reservation on full cache";
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EXPECT_GE(test_cache_rev_mng->GetTotalReservedCacheSize(),
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1 * kSizeDummyEntry)
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<< "Failed to bookkeep correctly before cache resevation failure happens "
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"due to full cache";
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EXPECT_LE(test_cache_rev_mng->GetTotalReservedCacheSize(),
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kSmallCacheCapacity)
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<< "Failed to bookkeep correctly (i.e, bookkeep only successful dummy "
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"entry insertions) when encountering cache resevation failure due to "
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"full cache";
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EXPECT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry)
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<< "Failed to insert underlying dummy entries correctly when "
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"encountering cache resevation failure due to full cache";
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EXPECT_LE(cache->GetPinnedUsage(), kSmallCacheCapacity)
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<< "Failed to insert underlying dummy entries correctly when "
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"encountering cache resevation failure due to full cache";
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// Increase cache capacity so the previously failed insertion can fully
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// succeed
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cache->SetCapacity(kBigCacheCapacity);
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new_mem_used = kSmallCacheCapacity + 1;
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to increase cache reservation after increasing cache capacity "
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"and mitigating cache full error";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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5 * kSizeDummyEntry)
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<< "Failed to bookkeep cache reservation increase correctly after "
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"increasing cache capacity and mitigating cache full error";
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EXPECT_GE(cache->GetPinnedUsage(), 5 * kSizeDummyEntry)
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<< "Failed to insert underlying dummy entries correctly after increasing "
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"cache capacity and mitigating cache full error";
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EXPECT_LT(cache->GetPinnedUsage(),
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5 * kSizeDummyEntry + kMetaDataChargeOverhead)
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<< "Failed to insert underlying dummy entries correctly after increasing "
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"cache capacity and mitigating cache full error";
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}
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TEST_F(CacheReservationManagerTest,
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DecreaseCacheReservationByMultiplesOfDummyEntrySize) {
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std::size_t new_mem_used = 2 * kSizeDummyEntry;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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ASSERT_EQ(s, Status::OK());
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ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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2 * kSizeDummyEntry);
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ASSERT_GE(cache->GetPinnedUsage(), 2 * kSizeDummyEntry);
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ASSERT_LT(cache->GetPinnedUsage(),
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2 * kSizeDummyEntry + kMetaDataChargeOverhead);
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new_mem_used = 1 * kSizeDummyEntry;
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to decrease cache reservation correctly";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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1 * kSizeDummyEntry)
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<< "Failed to bookkeep cache reservation decrease correctly";
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EXPECT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry)
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<< "Failed to decrease underlying dummy entries in cache correctly";
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EXPECT_LT(cache->GetPinnedUsage(),
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1 * kSizeDummyEntry + kMetaDataChargeOverhead)
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<< "Failed to decrease underlying dummy entries in cache correctly";
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}
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TEST_F(CacheReservationManagerTest,
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DecreaseCacheReservationNotByMultiplesOfDummyEntrySize) {
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std::size_t new_mem_used = 2 * kSizeDummyEntry;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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ASSERT_EQ(s, Status::OK());
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ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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2 * kSizeDummyEntry);
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ASSERT_GE(cache->GetPinnedUsage(), 2 * kSizeDummyEntry);
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ASSERT_LT(cache->GetPinnedUsage(),
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2 * kSizeDummyEntry + kMetaDataChargeOverhead);
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new_mem_used = kSizeDummyEntry / 2;
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to decrease cache reservation correctly";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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1 * kSizeDummyEntry)
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<< "Failed to bookkeep cache reservation decrease correctly";
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EXPECT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry)
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<< "Failed to decrease underlying dummy entries in cache correctly";
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EXPECT_LT(cache->GetPinnedUsage(),
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1 * kSizeDummyEntry + kMetaDataChargeOverhead)
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<< "Failed to decrease underlying dummy entries in cache correctly";
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}
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TEST(CacheReservationManagerWithDelayedDecreaseTest,
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DecreaseCacheReservationWithDelayedDecrease) {
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constexpr std::size_t kSizeDummyEntry =
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CacheReservationManager::GetDummyEntrySize();
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constexpr std::size_t kCacheCapacity = 4096 * kSizeDummyEntry;
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constexpr std::size_t kMetaDataChargeOverhead = 10000;
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LRUCacheOptions lo;
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lo.capacity = kCacheCapacity;
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lo.num_shard_bits = 0;
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std::shared_ptr<Cache> cache = NewLRUCache(lo);
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std::unique_ptr<CacheReservationManager> test_cache_rev_mng(
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new CacheReservationManager(cache, true /* delayed_decrease */));
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std::size_t new_mem_used = 8 * kSizeDummyEntry;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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ASSERT_EQ(s, Status::OK());
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ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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8 * kSizeDummyEntry);
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std::size_t initial_pinned_usage = cache->GetPinnedUsage();
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ASSERT_GE(initial_pinned_usage, 8 * kSizeDummyEntry);
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ASSERT_LT(initial_pinned_usage,
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8 * kSizeDummyEntry + kMetaDataChargeOverhead);
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new_mem_used = 6 * kSizeDummyEntry;
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK()) << "Failed to delay decreasing cache reservation";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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8 * kSizeDummyEntry)
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<< "Failed to bookkeep correctly when delaying cache reservation "
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"decrease";
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EXPECT_EQ(cache->GetPinnedUsage(), initial_pinned_usage)
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<< "Failed to delay decreasing underlying dummy entries in cache";
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new_mem_used = 7 * kSizeDummyEntry;
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK()) << "Failed to delay decreasing cache reservation";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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8 * kSizeDummyEntry)
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<< "Failed to bookkeep correctly when delaying cache reservation "
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"decrease";
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EXPECT_EQ(cache->GetPinnedUsage(), initial_pinned_usage)
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<< "Failed to delay decreasing underlying dummy entries in cache";
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new_mem_used = 6 * kSizeDummyEntry - 1;
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s = test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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EXPECT_EQ(s, Status::OK())
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<< "Failed to decrease cache reservation correctly when new_mem_used < "
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"GetTotalReservedCacheSize() * 3 / 4 on delayed decrease mode";
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EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
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6 * kSizeDummyEntry)
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<< "Failed to bookkeep correctly when new_mem_used < "
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"GetTotalReservedCacheSize() * 3 / 4 on delayed decrease mode";
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EXPECT_GE(cache->GetPinnedUsage(), 6 * kSizeDummyEntry)
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<< "Failed to decrease underlying dummy entries in cache when "
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"new_mem_used < GetTotalReservedCacheSize() * 3 / 4 on delayed "
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"decrease mode";
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EXPECT_LT(cache->GetPinnedUsage(),
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6 * kSizeDummyEntry + kMetaDataChargeOverhead)
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<< "Failed to decrease underlying dummy entries in cache when "
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"new_mem_used < GetTotalReservedCacheSize() * 3 / 4 on delayed "
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"decrease mode";
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}
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TEST(CacheReservationManagerDestructorTest,
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ReleaseRemainingDummyEntriesOnDestruction) {
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constexpr std::size_t kSizeDummyEntry =
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CacheReservationManager::GetDummyEntrySize();
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constexpr std::size_t kCacheCapacity = 4096 * kSizeDummyEntry;
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constexpr std::size_t kMetaDataChargeOverhead = 10000;
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LRUCacheOptions lo;
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lo.capacity = kCacheCapacity;
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lo.num_shard_bits = 0;
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std::shared_ptr<Cache> cache = NewLRUCache(lo);
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{
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std::unique_ptr<CacheReservationManager> test_cache_rev_mng(
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new CacheReservationManager(cache));
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std::size_t new_mem_used = 1 * kSizeDummyEntry;
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Status s =
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test_cache_rev_mng
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->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
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new_mem_used);
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ASSERT_EQ(s, Status::OK());
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ASSERT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry);
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ASSERT_LT(cache->GetPinnedUsage(),
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1 * kSizeDummyEntry + kMetaDataChargeOverhead);
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}
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EXPECT_EQ(cache->GetPinnedUsage(), 0 * kSizeDummyEntry)
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<< "Failed to release remaining underlying dummy entries in cache in "
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"CacheReservationManager's destructor";
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}
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} // namespace ROCKSDB_NAMESPACE
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|