141 lines
4.1 KiB
C++
141 lines
4.1 KiB
C++
|
// Copyright (c) 2020-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 "test_util/testharness.h"
|
||
|
|
||
|
#ifdef ROCKSDB_LIB_IO_POSIX
|
||
|
#include "env/io_posix.h"
|
||
|
|
||
|
namespace ROCKSDB_NAMESPACE {
|
||
|
|
||
|
#ifdef OS_LINUX
|
||
|
class LogicalBlockSizeCacheTest : public testing::Test {};
|
||
|
|
||
|
// Tests the caching behavior.
|
||
|
TEST_F(LogicalBlockSizeCacheTest, Cache) {
|
||
|
int ncall = 0;
|
||
|
auto get_fd_block_size = [&](int fd) {
|
||
|
ncall++;
|
||
|
return fd;
|
||
|
};
|
||
|
std::map<std::string, int> dir_fds{
|
||
|
{"/", 0},
|
||
|
{"/db", 1},
|
||
|
{"/db1", 2},
|
||
|
{"/db2", 3},
|
||
|
};
|
||
|
auto get_dir_block_size = [&](const std::string& dir, size_t* size) {
|
||
|
ncall++;
|
||
|
*size = dir_fds[dir];
|
||
|
return Status::OK();
|
||
|
};
|
||
|
LogicalBlockSizeCache cache(get_fd_block_size, get_dir_block_size);
|
||
|
ASSERT_EQ(0, ncall);
|
||
|
ASSERT_EQ(0, cache.Size());
|
||
|
|
||
|
ASSERT_EQ(6, cache.GetLogicalBlockSize("/sst", 6));
|
||
|
ASSERT_EQ(1, ncall);
|
||
|
ASSERT_EQ(7, cache.GetLogicalBlockSize("/db/sst1", 7));
|
||
|
ASSERT_EQ(2, ncall);
|
||
|
ASSERT_EQ(8, cache.GetLogicalBlockSize("/db/sst2", 8));
|
||
|
ASSERT_EQ(3, ncall);
|
||
|
|
||
|
ASSERT_OK(cache.RefAndCacheLogicalBlockSize({"/", "/db1/", "/db2"}));
|
||
|
ASSERT_EQ(3, cache.Size());
|
||
|
ASSERT_TRUE(cache.Contains("/"));
|
||
|
ASSERT_TRUE(cache.Contains("/db1"));
|
||
|
ASSERT_TRUE(cache.Contains("/db2"));
|
||
|
ASSERT_EQ(6, ncall);
|
||
|
// Block size for / is cached.
|
||
|
ASSERT_EQ(0, cache.GetLogicalBlockSize("/sst", 6));
|
||
|
ASSERT_EQ(6, ncall);
|
||
|
// No cached size for /db.
|
||
|
ASSERT_EQ(7, cache.GetLogicalBlockSize("/db/sst1", 7));
|
||
|
ASSERT_EQ(7, ncall);
|
||
|
ASSERT_EQ(8, cache.GetLogicalBlockSize("/db/sst2", 8));
|
||
|
ASSERT_EQ(8, ncall);
|
||
|
// Block size for /db1 is cached.
|
||
|
ASSERT_EQ(2, cache.GetLogicalBlockSize("/db1/sst1", 4));
|
||
|
ASSERT_EQ(8, ncall);
|
||
|
ASSERT_EQ(2, cache.GetLogicalBlockSize("/db1/sst2", 5));
|
||
|
ASSERT_EQ(8, ncall);
|
||
|
// Block size for /db2 is cached.
|
||
|
ASSERT_EQ(3, cache.GetLogicalBlockSize("/db2/sst1", 6));
|
||
|
ASSERT_EQ(8, ncall);
|
||
|
ASSERT_EQ(3, cache.GetLogicalBlockSize("/db2/sst2", 7));
|
||
|
ASSERT_EQ(8, ncall);
|
||
|
|
||
|
cache.RefAndCacheLogicalBlockSize({"/db"});
|
||
|
ASSERT_EQ(4, cache.Size());
|
||
|
ASSERT_TRUE(cache.Contains("/"));
|
||
|
ASSERT_TRUE(cache.Contains("/db1"));
|
||
|
ASSERT_TRUE(cache.Contains("/db2"));
|
||
|
ASSERT_TRUE(cache.Contains("/db"));
|
||
|
|
||
|
ASSERT_EQ(9, ncall);
|
||
|
// Block size for /db is cached.
|
||
|
ASSERT_EQ(1, cache.GetLogicalBlockSize("/db/sst1", 7));
|
||
|
ASSERT_EQ(9, ncall);
|
||
|
ASSERT_EQ(1, cache.GetLogicalBlockSize("/db/sst2", 8));
|
||
|
ASSERT_EQ(9, ncall);
|
||
|
}
|
||
|
|
||
|
// Tests the reference counting behavior.
|
||
|
TEST_F(LogicalBlockSizeCacheTest, Ref) {
|
||
|
int ncall = 0;
|
||
|
auto get_fd_block_size = [&](int fd) {
|
||
|
ncall++;
|
||
|
return fd;
|
||
|
};
|
||
|
std::map<std::string, int> dir_fds{
|
||
|
{"/db", 0},
|
||
|
};
|
||
|
auto get_dir_block_size = [&](const std::string& dir, size_t* size) {
|
||
|
ncall++;
|
||
|
*size = dir_fds[dir];
|
||
|
return Status::OK();
|
||
|
};
|
||
|
LogicalBlockSizeCache cache(get_fd_block_size, get_dir_block_size);
|
||
|
|
||
|
ASSERT_EQ(0, ncall);
|
||
|
|
||
|
ASSERT_EQ(1, cache.GetLogicalBlockSize("/db/sst0", 1));
|
||
|
ASSERT_EQ(1, ncall);
|
||
|
|
||
|
cache.RefAndCacheLogicalBlockSize({"/db"});
|
||
|
ASSERT_EQ(2, ncall);
|
||
|
ASSERT_EQ(1, cache.GetRefCount("/db"));
|
||
|
// Block size for /db is cached. Ref count = 1.
|
||
|
ASSERT_EQ(0, cache.GetLogicalBlockSize("/db/sst1", 1));
|
||
|
ASSERT_EQ(2, ncall);
|
||
|
|
||
|
// Ref count = 2, but won't recompute the cached buffer size.
|
||
|
cache.RefAndCacheLogicalBlockSize({"/db"});
|
||
|
ASSERT_EQ(2, cache.GetRefCount("/db"));
|
||
|
ASSERT_EQ(2, ncall);
|
||
|
|
||
|
// Ref count = 1.
|
||
|
cache.UnrefAndTryRemoveCachedLogicalBlockSize({"/db"});
|
||
|
ASSERT_EQ(1, cache.GetRefCount("/db"));
|
||
|
// Block size for /db is still cached.
|
||
|
ASSERT_EQ(0, cache.GetLogicalBlockSize("/db/sst2", 1));
|
||
|
ASSERT_EQ(2, ncall);
|
||
|
|
||
|
// Ref count = 0 and cached buffer size for /db is removed.
|
||
|
cache.UnrefAndTryRemoveCachedLogicalBlockSize({"/db"});
|
||
|
ASSERT_EQ(0, cache.Size());
|
||
|
ASSERT_EQ(1, cache.GetLogicalBlockSize("/db/sst0", 1));
|
||
|
ASSERT_EQ(3, ncall);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
} // namespace ROCKSDB_NAMESPACE
|
||
|
#endif
|
||
|
|
||
|
int main(int argc, char** argv) {
|
||
|
::testing::InitGoogleTest(&argc, argv);
|
||
|
return RUN_ALL_TESTS();
|
||
|
}
|