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Block fetch CPU time counters in perf context (#11342)

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Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/11342

Reviewed By: ajkr

Differential Revision: D45026838

Pulled By: mnv104

fbshipit-source-id: 099ed9579922b8fa6e7d3332bbb829d50ec47d91
oxigraph-8.3.2
Murali Vilayannur 2 years ago committed by Facebook GitHub Bot
parent 4d72f48e57
commit 226ee25d30
6 changed files with 274 additions and 595 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 2
      db/c.cc
  2. 3
      include/rocksdb/c.h
  3. 74
      include/rocksdb/perf_context.h
  4. 7
      microbench/db_basic_bench.cc
  5. 781
      monitoring/perf_context.cc
  6. 2
      table/block_fetcher.cc

2
db/c.cc
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@ -4064,6 +4064,8 @@ uint64_t rocksdb_perfcontext_metric(rocksdb_perfcontext_t* context,
return rep->blob_decompress_time;
case rocksdb_internal_range_del_reseek_count:
return rep->internal_range_del_reseek_count;
case rocksdb_block_read_cpu_time:
return rep->block_read_cpu_time;
default:
break;
}

3
include/rocksdb/c.h
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@ -1718,7 +1718,8 @@ enum {
rocksdb_blob_checksum_time,
rocksdb_blob_decompress_time,
rocksdb_internal_range_del_reseek_count,
rocksdb_total_metric_count = 78
rocksdb_block_read_cpu_time,
rocksdb_total_metric_count = 79
};
extern ROCKSDB_LIBRARY_API void rocksdb_set_perf_level(int);

74
include/rocksdb/perf_context.h
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@ -14,13 +14,17 @@
namespace ROCKSDB_NAMESPACE {
// A thread local context for gathering performance counter efficiently
// and transparently.
// Use SetPerfLevel(PerfLevel::kEnableTime) to enable time stats.
/*
* NOTE:
* Please do not reorder the fields in this structure. If you plan to do that or
* add/remove fields to this structure, builds would fail. The way to fix the
* builds would be to add the appropriate fields to the
* DEF_PERF_CONTEXT_LEVEL_METRICS() macro in the perf_context.cc file.
*/
// Break down performance counters by level and store per-level perf context in
// PerfContextByLevel
struct PerfContextByLevel {
struct PerfContextByLevelBase {
// # of times bloom filter has avoided file reads, i.e., negatives.
uint64_t bloom_filter_useful = 0;
// # of times bloom FullFilter has not avoided the reads.
@ -38,37 +42,34 @@ struct PerfContextByLevel {
uint64_t block_cache_hit_count = 0; // total number of block cache hits
uint64_t block_cache_miss_count = 0; // total number of block cache misses
void Reset(); // reset all performance counters to zero
};
struct PerfContext {
~PerfContext();
PerfContext() {}
PerfContext(const PerfContext&);
PerfContext& operator=(const PerfContext&);
PerfContext(PerfContext&&) noexcept;
// A thread local context for gathering performance counter efficiently
// and transparently.
// Use SetPerfLevel(PerfLevel::kEnableTime) to enable time stats.
// Break down performance counters by level and store per-level perf context in
// PerfContextByLevel
struct PerfContextByLevel : public PerfContextByLevelBase {
void Reset(); // reset all performance counters to zero
};
std::string ToString(bool exclude_zero_counters = false) const;
// enable per level perf context and allocate storage for PerfContextByLevel
void EnablePerLevelPerfContext();
// temporarily disable per level perf context by setting the flag to false
void DisablePerLevelPerfContext();
// free the space for PerfContextByLevel, also disable per level perf context
void ClearPerLevelPerfContext();
/*
* NOTE:
* Please do not reorder the fields in this structure. If you plan to do that or
* add/remove fields to this structure, builds would fail. The way to fix the
* builds would be to add the appropriate fields to the
* DEF_PERF_CONTEXT_METRICS() macro in the perf_context.cc file.
*/
struct PerfContextBase {
uint64_t user_key_comparison_count; // total number of user key comparisons
uint64_t block_cache_hit_count; // total number of block cache hits
uint64_t block_read_count; // total number of block reads (with IO)
uint64_t block_read_byte; // total number of bytes from block reads
uint64_t block_read_time; // total nanos spent on block reads
// total cpu time in nanos spent on block reads
uint64_t block_read_cpu_time;
uint64_t block_cache_index_hit_count; // total number of index block hits
// total number of standalone handles lookup from secondary cache
uint64_t block_cache_standalone_handle_count;
@ -267,9 +268,34 @@ struct PerfContext {
uint64_t decrypt_data_nanos;
uint64_t number_async_seek;
};
struct PerfContext : public PerfContextBase {
~PerfContext();
PerfContext() {}
PerfContext(const PerfContext&);
PerfContext& operator=(const PerfContext&);
PerfContext(PerfContext&&) noexcept;
void Reset(); // reset all performance counters to zero
std::string ToString(bool exclude_zero_counters = false) const;
// enable per level perf context and allocate storage for PerfContextByLevel
void EnablePerLevelPerfContext();
// temporarily disable per level perf context by setting the flag to false
void DisablePerLevelPerfContext();
// free the space for PerfContextByLevel, also disable per level perf context
void ClearPerLevelPerfContext();
std::map<uint32_t, PerfContextByLevel>* level_to_perf_context = nullptr;
bool per_level_perf_context_enabled = false;
void copyMetrics(const PerfContext* other) noexcept;
};
// If RocksDB is compiled with -DNPERF_CONTEXT, then a pointer to a global,

7
microbench/db_basic_bench.cc
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@ -436,6 +436,8 @@ static void ManualCompaction(benchmark::State& state) {
static_cast<double>(get_perf_context()->block_read_count);
state.counters["block_read_time"] =
static_cast<double>(get_perf_context()->block_read_time);
state.counters["block_read_cpu_time"] =
static_cast<double>(get_perf_context()->block_read_cpu_time);
state.counters["block_checksum_time"] =
static_cast<double>(get_perf_context()->block_checksum_time);
state.counters["new_table_block_iter_nanos"] =
@ -721,6 +723,7 @@ static void SimpleGetWithPerfContext(benchmark::State& state) {
size_t not_found = 0;
uint64_t user_key_comparison_count = 0;
uint64_t block_read_time = 0;
uint64_t block_read_cpu_time = 0;
uint64_t block_checksum_time = 0;
uint64_t get_snapshot_time = 0;
uint64_t get_post_process_time = 0;
@ -740,6 +743,7 @@ static void SimpleGetWithPerfContext(benchmark::State& state) {
}
user_key_comparison_count += get_perf_context()->user_key_comparison_count;
block_read_time += get_perf_context()->block_read_time;
block_read_cpu_time += get_perf_context()->block_read_cpu_time;
block_checksum_time += get_perf_context()->block_checksum_time;
get_snapshot_time += get_perf_context()->get_snapshot_time;
get_post_process_time += get_perf_context()->get_post_process_time;
@ -760,6 +764,9 @@ static void SimpleGetWithPerfContext(benchmark::State& state) {
benchmark::Counter::kAvgIterations);
state.counters["block_read_time"] = benchmark::Counter(
static_cast<double>(block_read_time), benchmark::Counter::kAvgIterations);
state.counters["block_read_cpu_time"] =
benchmark::Counter(static_cast<double>(block_read_cpu_time),
benchmark::Counter::kAvgIterations);
state.counters["block_checksum_time"] =
benchmark::Counter(static_cast<double>(block_checksum_time),
benchmark::Counter::kAvgIterations);

781
monitoring/perf_context.cc
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@ -10,6 +10,154 @@
namespace ROCKSDB_NAMESPACE {
/*
* Please add new metrics to this macro and appropriate fields will be copied,
* and/or emitted when converted to string.
* When people need to add new metrics please add the metric to the macro below
* and enclose the name of the specific metric within defCmd().
* The position of the field will be dictated by the
* order in which the macros are enumerated and the offsets of the fields will
* be matched against ''PerfContextByLevelBase'' declared in perf_context.h.
*/
// clang-format off
#define DEF_PERF_CONTEXT_LEVEL_METRICS(defCmd) \
defCmd(bloom_filter_useful) \
defCmd(bloom_filter_full_positive) \
defCmd(bloom_filter_full_true_positive) \
defCmd(user_key_return_count) \
defCmd(get_from_table_nanos) \
defCmd(block_cache_hit_count) \
defCmd(block_cache_miss_count)
// clang-format on
// Break down performance counters by level and store per-level perf context in
// PerfContextByLevel
struct PerfContextByLevelInt {
#define EMIT_FIELDS(x) uint64_t x = 0;
DEF_PERF_CONTEXT_LEVEL_METRICS(EMIT_FIELDS)
#undef EMIT_FIELDS
};
/*
* Please add new metrics to this macro and appropriate fields will be copied,
* and/or emitted when converted to string.
* When people need to add new metrics please enclose the name of the specific
* metric within defCmd(). The position of the field will be dictated by the
* order in which the macros are enumerated and the offsets of the fields will
* be matched against ''PerfContextBase'' declared in perf_context.h.
*/
// clang-format off
#define DEF_PERF_CONTEXT_METRICS(defCmd) \
defCmd(user_key_comparison_count) \
defCmd(block_cache_hit_count) \
defCmd(block_read_count) \
defCmd(block_read_byte) \
defCmd(block_read_time) \
defCmd(block_read_cpu_time) \
defCmd(block_cache_index_hit_count) \
defCmd(block_cache_standalone_handle_count) \
defCmd(block_cache_real_handle_count) \
defCmd(index_block_read_count) \
defCmd(block_cache_filter_hit_count) \
defCmd(filter_block_read_count) \
defCmd(compression_dict_block_read_count) \
defCmd(secondary_cache_hit_count) \
defCmd(compressed_sec_cache_insert_real_count) \
defCmd(compressed_sec_cache_insert_dummy_count) \
defCmd(compressed_sec_cache_uncompressed_bytes) \
defCmd(compressed_sec_cache_compressed_bytes) \
defCmd(block_checksum_time) \
defCmd(block_decompress_time) \
defCmd(get_read_bytes) \
defCmd(multiget_read_bytes) \
defCmd(iter_read_bytes) \
defCmd(blob_cache_hit_count) \
defCmd(blob_read_count) \
defCmd(blob_read_byte) \
defCmd(blob_read_time) \
defCmd(blob_checksum_time) \
defCmd(blob_decompress_time) \
defCmd(internal_key_skipped_count) \
defCmd(internal_delete_skipped_count) \
defCmd(internal_recent_skipped_count) \
defCmd(internal_merge_count) \
defCmd(internal_merge_point_lookup_count) \
defCmd(internal_range_del_reseek_count) \
defCmd(get_snapshot_time) \
defCmd(get_from_memtable_time) \
defCmd(get_from_memtable_count) \
defCmd(get_post_process_time) \
defCmd(get_from_output_files_time) \
defCmd(seek_on_memtable_time) \
defCmd(seek_on_memtable_count) \
defCmd(next_on_memtable_count) \
defCmd(prev_on_memtable_count) \
defCmd(seek_child_seek_time) \
defCmd(seek_child_seek_count) \
defCmd(seek_min_heap_time) \
defCmd(seek_max_heap_time) \
defCmd(seek_internal_seek_time) \
defCmd(find_next_user_entry_time) \
defCmd(write_wal_time) \
defCmd(write_memtable_time) \
defCmd(write_delay_time) \
defCmd(write_scheduling_flushes_compactions_time)\
defCmd(write_pre_and_post_process_time) \
defCmd(write_thread_wait_nanos) \
defCmd(db_mutex_lock_nanos) \
defCmd(db_condition_wait_nanos) \
defCmd(merge_operator_time_nanos) \
defCmd(read_index_block_nanos) \
defCmd(read_filter_block_nanos) \
defCmd(new_table_block_iter_nanos) \
defCmd(new_table_iterator_nanos) \
defCmd(block_seek_nanos) \
defCmd(find_table_nanos) \
defCmd(bloom_memtable_hit_count) \
defCmd(bloom_memtable_miss_count) \
defCmd(bloom_sst_hit_count) \
defCmd(bloom_sst_miss_count) \
defCmd(key_lock_wait_time) \
defCmd(key_lock_wait_count) \
defCmd(env_new_sequential_file_nanos) \
defCmd(env_new_random_access_file_nanos) \
defCmd(env_new_writable_file_nanos) \
defCmd(env_reuse_writable_file_nanos) \
defCmd(env_new_random_rw_file_nanos) \
defCmd(env_new_directory_nanos) \
defCmd(env_file_exists_nanos) \
defCmd(env_get_children_nanos) \
defCmd(env_get_children_file_attributes_nanos) \
defCmd(env_delete_file_nanos) \
defCmd(env_create_dir_nanos) \
defCmd(env_create_dir_if_missing_nanos) \
defCmd(env_delete_dir_nanos) \
defCmd(env_get_file_size_nanos) \
defCmd(env_get_file_modification_time_nanos) \
defCmd(env_rename_file_nanos) \
defCmd(env_link_file_nanos) \
defCmd(env_lock_file_nanos) \
defCmd(env_unlock_file_nanos) \
defCmd(env_new_logger_nanos) \
defCmd(get_cpu_nanos) \
defCmd(iter_next_cpu_nanos) \
defCmd(iter_prev_cpu_nanos) \
defCmd(iter_seek_cpu_nanos) \
defCmd(iter_next_count) \
defCmd(iter_prev_count) \
defCmd(iter_seek_count) \
defCmd(encrypt_data_nanos) \
defCmd(decrypt_data_nanos) \
defCmd(number_async_seek)
// clang-format on
struct PerfContextInt {
#define EMIT_FIELDS(x) uint64_t x;
DEF_PERF_CONTEXT_METRICS(EMIT_FIELDS)
#undef EMIT_FIELDS
};
#if defined(NPERF_CONTEXT)
// Should not be used because the counters are not thread-safe.
// Put here just to make get_perf_context() simple without ifdef.
@ -18,7 +166,30 @@ PerfContext perf_context;
thread_local PerfContext perf_context;
#endif
PerfContext* get_perf_context() { return &perf_context; }
PerfContext* get_perf_context() {
static_assert(sizeof(PerfContextBase) == sizeof(PerfContextInt));
static_assert(sizeof(PerfContextByLevelBase) ==
sizeof(PerfContextByLevelInt));
/*
* Validate that we have the same fields and offsets between the external user
* facing
* ''PerfContextBase'' and ''PerfContextByLevelBase' structures with the
* internal structures that we generate from the DEF_* macros above. This way
* if people add metrics to the user-facing header file, they will have a
* build failure and need to add similar fields to the macros in this file.
* These are compile-time validations and don't impose any run-time penalties.
*/
#define EMIT_OFFSET_ASSERTION(x) \
static_assert(offsetof(PerfContextBase, x) == offsetof(PerfContextInt, x));
DEF_PERF_CONTEXT_METRICS(EMIT_OFFSET_ASSERTION)
#undef EMIT_OFFSET_ASSERTION
#define EMIT_OFFSET_ASSERTION(x) \
static_assert(offsetof(PerfContextByLevelBase, x) == \
offsetof(PerfContextByLevelInt, x));
DEF_PERF_CONTEXT_LEVEL_METRICS(EMIT_OFFSET_ASSERTION)
#undef EMIT_OFFSET_ASSERTION
return &perf_context;
}
PerfContext::~PerfContext() {
#if !defined(NPERF_CONTEXT) && !defined(OS_SOLARIS)
@ -30,122 +201,7 @@ PerfContext::PerfContext(const PerfContext& other) {
#ifdef NPERF_CONTEXT
(void)other;
#else
user_key_comparison_count = other.user_key_comparison_count;
block_cache_hit_count = other.block_cache_hit_count;
block_read_count = other.block_read_count;
block_read_byte = other.block_read_byte;
block_read_time = other.block_read_time;
block_cache_index_hit_count = other.block_cache_index_hit_count;
block_cache_standalone_handle_count =
other.block_cache_standalone_handle_count;
block_cache_real_handle_count = other.block_cache_real_handle_count;
index_block_read_count = other.index_block_read_count;
block_cache_filter_hit_count = other.block_cache_filter_hit_count;
filter_block_read_count = other.filter_block_read_count;
compression_dict_block_read_count = other.compression_dict_block_read_count;
secondary_cache_hit_count = other.secondary_cache_hit_count;
compressed_sec_cache_insert_real_count =
other.compressed_sec_cache_insert_real_count;
compressed_sec_cache_insert_dummy_count =
other.compressed_sec_cache_insert_dummy_count;
compressed_sec_cache_uncompressed_bytes =
other.compressed_sec_cache_uncompressed_bytes;
compressed_sec_cache_compressed_bytes =
other.compressed_sec_cache_compressed_bytes;
block_checksum_time = other.block_checksum_time;
block_decompress_time = other.block_decompress_time;
get_read_bytes = other.get_read_bytes;
multiget_read_bytes = other.multiget_read_bytes;
iter_read_bytes = other.iter_read_bytes;
blob_cache_hit_count = other.blob_cache_hit_count;
blob_read_count = other.blob_read_count;
blob_read_byte = other.blob_read_byte;
blob_read_time = other.blob_read_time;
blob_checksum_time = other.blob_checksum_time;
blob_decompress_time = other.blob_decompress_time;
internal_key_skipped_count = other.internal_key_skipped_count;
internal_delete_skipped_count = other.internal_delete_skipped_count;
internal_recent_skipped_count = other.internal_recent_skipped_count;
internal_merge_count = other.internal_merge_count;
internal_merge_point_lookup_count = other.internal_merge_point_lookup_count;
internal_range_del_reseek_count = other.internal_range_del_reseek_count;
write_wal_time = other.write_wal_time;
get_snapshot_time = other.get_snapshot_time;
get_from_memtable_time = other.get_from_memtable_time;
get_from_memtable_count = other.get_from_memtable_count;
get_post_process_time = other.get_post_process_time;
get_from_output_files_time = other.get_from_output_files_time;
seek_on_memtable_time = other.seek_on_memtable_time;
seek_on_memtable_count = other.seek_on_memtable_count;
next_on_memtable_count = other.next_on_memtable_count;
prev_on_memtable_count = other.prev_on_memtable_count;
seek_child_seek_time = other.seek_child_seek_time;
seek_child_seek_count = other.seek_child_seek_count;
seek_min_heap_time = other.seek_min_heap_time;
seek_internal_seek_time = other.seek_internal_seek_time;
find_next_user_entry_time = other.find_next_user_entry_time;
write_pre_and_post_process_time = other.write_pre_and_post_process_time;
write_memtable_time = other.write_memtable_time;
write_delay_time = other.write_delay_time;
write_thread_wait_nanos = other.write_thread_wait_nanos;
write_scheduling_flushes_compactions_time =
other.write_scheduling_flushes_compactions_time;
db_mutex_lock_nanos = other.db_mutex_lock_nanos;
db_condition_wait_nanos = other.db_condition_wait_nanos;
merge_operator_time_nanos = other.merge_operator_time_nanos;
read_index_block_nanos = other.read_index_block_nanos;
read_filter_block_nanos = other.read_filter_block_nanos;
new_table_block_iter_nanos = other.new_table_block_iter_nanos;
new_table_iterator_nanos = other.new_table_iterator_nanos;
block_seek_nanos = other.block_seek_nanos;
find_table_nanos = other.find_table_nanos;
bloom_memtable_hit_count = other.bloom_memtable_hit_count;
bloom_memtable_miss_count = other.bloom_memtable_miss_count;
bloom_sst_hit_count = other.bloom_sst_hit_count;
bloom_sst_miss_count = other.bloom_sst_miss_count;
key_lock_wait_time = other.key_lock_wait_time;
key_lock_wait_count = other.key_lock_wait_count;
env_new_sequential_file_nanos = other.env_new_sequential_file_nanos;
env_new_random_access_file_nanos = other.env_new_random_access_file_nanos;
env_new_writable_file_nanos = other.env_new_writable_file_nanos;
env_reuse_writable_file_nanos = other.env_reuse_writable_file_nanos;
env_new_random_rw_file_nanos = other.env_new_random_rw_file_nanos;
env_new_directory_nanos = other.env_new_directory_nanos;
env_file_exists_nanos = other.env_file_exists_nanos;
env_get_children_nanos = other.env_get_children_nanos;
env_get_children_file_attributes_nanos =
other.env_get_children_file_attributes_nanos;
env_delete_file_nanos = other.env_delete_file_nanos;
env_create_dir_nanos = other.env_create_dir_nanos;
env_create_dir_if_missing_nanos = other.env_create_dir_if_missing_nanos;
env_delete_dir_nanos = other.env_delete_dir_nanos;
env_get_file_size_nanos = other.env_get_file_size_nanos;
env_get_file_modification_time_nanos =
other.env_get_file_modification_time_nanos;
env_rename_file_nanos = other.env_rename_file_nanos;
env_link_file_nanos = other.env_link_file_nanos;
env_lock_file_nanos = other.env_lock_file_nanos;
env_unlock_file_nanos = other.env_unlock_file_nanos;
env_new_logger_nanos = other.env_new_logger_nanos;
get_cpu_nanos = other.get_cpu_nanos;
iter_next_cpu_nanos = other.iter_next_cpu_nanos;
iter_prev_cpu_nanos = other.iter_prev_cpu_nanos;
iter_seek_cpu_nanos = other.iter_seek_cpu_nanos;
iter_next_count = other.iter_next_count;
iter_prev_count = other.iter_prev_count;
iter_seek_count = other.iter_seek_count;
number_async_seek = other.number_async_seek;
if (per_level_perf_context_enabled && level_to_perf_context != nullptr) {
ClearPerLevelPerfContext();
}
if (other.level_to_perf_context != nullptr) {
level_to_perf_context = new std::map<uint32_t, PerfContextByLevel>();
*level_to_perf_context = *other.level_to_perf_context;
}
per_level_perf_context_enabled = other.per_level_perf_context_enabled;
copyMetrics(&other);
#endif
}
@ -153,354 +209,42 @@ PerfContext::PerfContext(PerfContext&& other) noexcept {
#ifdef NPERF_CONTEXT
(void)other;
#else
user_key_comparison_count = other.user_key_comparison_count;
block_cache_hit_count = other.block_cache_hit_count;
block_read_count = other.block_read_count;
block_read_byte = other.block_read_byte;
block_read_time = other.block_read_time;
block_cache_index_hit_count = other.block_cache_index_hit_count;
block_cache_standalone_handle_count =
other.block_cache_standalone_handle_count;
block_cache_real_handle_count = other.block_cache_real_handle_count;
index_block_read_count = other.index_block_read_count;
block_cache_filter_hit_count = other.block_cache_filter_hit_count;
filter_block_read_count = other.filter_block_read_count;
compression_dict_block_read_count = other.compression_dict_block_read_count;
secondary_cache_hit_count = other.secondary_cache_hit_count;
compressed_sec_cache_insert_real_count =
other.compressed_sec_cache_insert_real_count;
compressed_sec_cache_insert_dummy_count =
other.compressed_sec_cache_insert_dummy_count;
compressed_sec_cache_uncompressed_bytes =
other.compressed_sec_cache_uncompressed_bytes;
compressed_sec_cache_compressed_bytes =
other.compressed_sec_cache_compressed_bytes;
block_checksum_time = other.block_checksum_time;
block_decompress_time = other.block_decompress_time;
get_read_bytes = other.get_read_bytes;
multiget_read_bytes = other.multiget_read_bytes;
iter_read_bytes = other.iter_read_bytes;
blob_cache_hit_count = other.blob_cache_hit_count;
blob_read_count = other.blob_read_count;
blob_read_byte = other.blob_read_byte;
blob_read_time = other.blob_read_time;
blob_checksum_time = other.blob_checksum_time;
blob_decompress_time = other.blob_decompress_time;
internal_key_skipped_count = other.internal_key_skipped_count;
internal_delete_skipped_count = other.internal_delete_skipped_count;
internal_recent_skipped_count = other.internal_recent_skipped_count;
internal_merge_count = other.internal_merge_count;
internal_merge_point_lookup_count = other.internal_merge_point_lookup_count;
internal_range_del_reseek_count = other.internal_range_del_reseek_count;
write_wal_time = other.write_wal_time;
get_snapshot_time = other.get_snapshot_time;
get_from_memtable_time = other.get_from_memtable_time;
get_from_memtable_count = other.get_from_memtable_count;
get_post_process_time = other.get_post_process_time;
get_from_output_files_time = other.get_from_output_files_time;
seek_on_memtable_time = other.seek_on_memtable_time;
seek_on_memtable_count = other.seek_on_memtable_count;
next_on_memtable_count = other.next_on_memtable_count;
prev_on_memtable_count = other.prev_on_memtable_count;
seek_child_seek_time = other.seek_child_seek_time;
seek_child_seek_count = other.seek_child_seek_count;
seek_min_heap_time = other.seek_min_heap_time;
seek_internal_seek_time = other.seek_internal_seek_time;
find_next_user_entry_time = other.find_next_user_entry_time;
write_pre_and_post_process_time = other.write_pre_and_post_process_time;
write_memtable_time = other.write_memtable_time;
write_delay_time = other.write_delay_time;
write_thread_wait_nanos = other.write_thread_wait_nanos;
write_scheduling_flushes_compactions_time =
other.write_scheduling_flushes_compactions_time;
db_mutex_lock_nanos = other.db_mutex_lock_nanos;
db_condition_wait_nanos = other.db_condition_wait_nanos;
merge_operator_time_nanos = other.merge_operator_time_nanos;
read_index_block_nanos = other.read_index_block_nanos;
read_filter_block_nanos = other.read_filter_block_nanos;
new_table_block_iter_nanos = other.new_table_block_iter_nanos;
new_table_iterator_nanos = other.new_table_iterator_nanos;
block_seek_nanos = other.block_seek_nanos;
find_table_nanos = other.find_table_nanos;
bloom_memtable_hit_count = other.bloom_memtable_hit_count;
bloom_memtable_miss_count = other.bloom_memtable_miss_count;
bloom_sst_hit_count = other.bloom_sst_hit_count;
bloom_sst_miss_count = other.bloom_sst_miss_count;
key_lock_wait_time = other.key_lock_wait_time;
key_lock_wait_count = other.key_lock_wait_count;
env_new_sequential_file_nanos = other.env_new_sequential_file_nanos;
env_new_random_access_file_nanos = other.env_new_random_access_file_nanos;
env_new_writable_file_nanos = other.env_new_writable_file_nanos;
env_reuse_writable_file_nanos = other.env_reuse_writable_file_nanos;
env_new_random_rw_file_nanos = other.env_new_random_rw_file_nanos;
env_new_directory_nanos = other.env_new_directory_nanos;
env_file_exists_nanos = other.env_file_exists_nanos;
env_get_children_nanos = other.env_get_children_nanos;
env_get_children_file_attributes_nanos =
other.env_get_children_file_attributes_nanos;
env_delete_file_nanos = other.env_delete_file_nanos;
env_create_dir_nanos = other.env_create_dir_nanos;
env_create_dir_if_missing_nanos = other.env_create_dir_if_missing_nanos;
env_delete_dir_nanos = other.env_delete_dir_nanos;
env_get_file_size_nanos = other.env_get_file_size_nanos;
env_get_file_modification_time_nanos =
other.env_get_file_modification_time_nanos;
env_rename_file_nanos = other.env_rename_file_nanos;
env_link_file_nanos = other.env_link_file_nanos;
env_lock_file_nanos = other.env_lock_file_nanos;
env_unlock_file_nanos = other.env_unlock_file_nanos;
env_new_logger_nanos = other.env_new_logger_nanos;
get_cpu_nanos = other.get_cpu_nanos;
iter_next_cpu_nanos = other.iter_next_cpu_nanos;
iter_prev_cpu_nanos = other.iter_prev_cpu_nanos;
iter_seek_cpu_nanos = other.iter_seek_cpu_nanos;
iter_next_count = other.iter_next_count;
iter_prev_count = other.iter_prev_count;
iter_seek_count = other.iter_seek_count;
number_async_seek = other.number_async_seek;
if (per_level_perf_context_enabled && level_to_perf_context != nullptr) {
ClearPerLevelPerfContext();
}
if (other.level_to_perf_context != nullptr) {
level_to_perf_context = other.level_to_perf_context;
other.level_to_perf_context = nullptr;
}
per_level_perf_context_enabled = other.per_level_perf_context_enabled;
copyMetrics(&other);
#endif
}
// TODO(Zhongyi): reduce code duplication between copy constructor and
// assignment operator
PerfContext& PerfContext::operator=(const PerfContext& other) {
#ifdef NPERF_CONTEXT
(void)other;
#else
user_key_comparison_count = other.user_key_comparison_count;
block_cache_hit_count = other.block_cache_hit_count;
block_read_count = other.block_read_count;
block_read_byte = other.block_read_byte;
block_read_time = other.block_read_time;
block_cache_index_hit_count = other.block_cache_index_hit_count;
block_cache_standalone_handle_count =
other.block_cache_standalone_handle_count;
block_cache_real_handle_count = other.block_cache_real_handle_count;
index_block_read_count = other.index_block_read_count;
block_cache_filter_hit_count = other.block_cache_filter_hit_count;
filter_block_read_count = other.filter_block_read_count;
compression_dict_block_read_count = other.compression_dict_block_read_count;
secondary_cache_hit_count = other.secondary_cache_hit_count;
compressed_sec_cache_insert_real_count =
other.compressed_sec_cache_insert_real_count;
compressed_sec_cache_insert_dummy_count =
other.compressed_sec_cache_insert_dummy_count;
compressed_sec_cache_uncompressed_bytes =
other.compressed_sec_cache_uncompressed_bytes;
compressed_sec_cache_compressed_bytes =
other.compressed_sec_cache_compressed_bytes;
block_checksum_time = other.block_checksum_time;
block_decompress_time = other.block_decompress_time;
get_read_bytes = other.get_read_bytes;
multiget_read_bytes = other.multiget_read_bytes;
iter_read_bytes = other.iter_read_bytes;
blob_cache_hit_count = other.blob_cache_hit_count;
blob_read_count = other.blob_read_count;
blob_read_byte = other.blob_read_byte;
blob_read_time = other.blob_read_time;
blob_checksum_time = other.blob_checksum_time;
blob_decompress_time = other.blob_decompress_time;
internal_key_skipped_count = other.internal_key_skipped_count;
internal_delete_skipped_count = other.internal_delete_skipped_count;
internal_recent_skipped_count = other.internal_recent_skipped_count;
internal_merge_count = other.internal_merge_count;
internal_merge_point_lookup_count = other.internal_merge_point_lookup_count;
internal_range_del_reseek_count = other.internal_range_del_reseek_count;
write_wal_time = other.write_wal_time;
get_snapshot_time = other.get_snapshot_time;
get_from_memtable_time = other.get_from_memtable_time;
get_from_memtable_count = other.get_from_memtable_count;
get_post_process_time = other.get_post_process_time;
get_from_output_files_time = other.get_from_output_files_time;
seek_on_memtable_time = other.seek_on_memtable_time;
seek_on_memtable_count = other.seek_on_memtable_count;
next_on_memtable_count = other.next_on_memtable_count;
prev_on_memtable_count = other.prev_on_memtable_count;
seek_child_seek_time = other.seek_child_seek_time;
seek_child_seek_count = other.seek_child_seek_count;
seek_min_heap_time = other.seek_min_heap_time;
seek_internal_seek_time = other.seek_internal_seek_time;
find_next_user_entry_time = other.find_next_user_entry_time;
write_pre_and_post_process_time = other.write_pre_and_post_process_time;
write_memtable_time = other.write_memtable_time;
write_delay_time = other.write_delay_time;
write_thread_wait_nanos = other.write_thread_wait_nanos;
write_scheduling_flushes_compactions_time =
other.write_scheduling_flushes_compactions_time;
db_mutex_lock_nanos = other.db_mutex_lock_nanos;
db_condition_wait_nanos = other.db_condition_wait_nanos;
merge_operator_time_nanos = other.merge_operator_time_nanos;
read_index_block_nanos = other.read_index_block_nanos;
read_filter_block_nanos = other.read_filter_block_nanos;
new_table_block_iter_nanos = other.new_table_block_iter_nanos;
new_table_iterator_nanos = other.new_table_iterator_nanos;
block_seek_nanos = other.block_seek_nanos;
find_table_nanos = other.find_table_nanos;
bloom_memtable_hit_count = other.bloom_memtable_hit_count;
bloom_memtable_miss_count = other.bloom_memtable_miss_count;
bloom_sst_hit_count = other.bloom_sst_hit_count;
bloom_sst_miss_count = other.bloom_sst_miss_count;
key_lock_wait_time = other.key_lock_wait_time;
key_lock_wait_count = other.key_lock_wait_count;
copyMetrics(&other);
#endif
return *this;
}
env_new_sequential_file_nanos = other.env_new_sequential_file_nanos;
env_new_random_access_file_nanos = other.env_new_random_access_file_nanos;
env_new_writable_file_nanos = other.env_new_writable_file_nanos;
env_reuse_writable_file_nanos = other.env_reuse_writable_file_nanos;
env_new_random_rw_file_nanos = other.env_new_random_rw_file_nanos;
env_new_directory_nanos = other.env_new_directory_nanos;
env_file_exists_nanos = other.env_file_exists_nanos;
env_get_children_nanos = other.env_get_children_nanos;
env_get_children_file_attributes_nanos =
other.env_get_children_file_attributes_nanos;
env_delete_file_nanos = other.env_delete_file_nanos;
env_create_dir_nanos = other.env_create_dir_nanos;
env_create_dir_if_missing_nanos = other.env_create_dir_if_missing_nanos;
env_delete_dir_nanos = other.env_delete_dir_nanos;
env_get_file_size_nanos = other.env_get_file_size_nanos;
env_get_file_modification_time_nanos =
other.env_get_file_modification_time_nanos;
env_rename_file_nanos = other.env_rename_file_nanos;
env_link_file_nanos = other.env_link_file_nanos;
env_lock_file_nanos = other.env_lock_file_nanos;
env_unlock_file_nanos = other.env_unlock_file_nanos;
env_new_logger_nanos = other.env_new_logger_nanos;
get_cpu_nanos = other.get_cpu_nanos;
iter_next_cpu_nanos = other.iter_next_cpu_nanos;
iter_prev_cpu_nanos = other.iter_prev_cpu_nanos;
iter_seek_cpu_nanos = other.iter_seek_cpu_nanos;
iter_next_count = other.iter_next_count;
iter_prev_count = other.iter_prev_count;
iter_seek_count = other.iter_seek_count;
number_async_seek = other.number_async_seek;
void PerfContext::copyMetrics(const PerfContext* other) noexcept {
#ifdef NPERF_CONTEXT
(void)other;
#else
#define EMIT_COPY_FIELDS(x) x = other->x;
DEF_PERF_CONTEXT_METRICS(EMIT_COPY_FIELDS)
#undef EMIT_COPY_FIELDS
if (per_level_perf_context_enabled && level_to_perf_context != nullptr) {
ClearPerLevelPerfContext();
}
if (other.level_to_perf_context != nullptr) {
if (other->level_to_perf_context != nullptr) {
level_to_perf_context = new std::map<uint32_t, PerfContextByLevel>();
*level_to_perf_context = *other.level_to_perf_context;
*level_to_perf_context = *other->level_to_perf_context;
}
per_level_perf_context_enabled = other.per_level_perf_context_enabled;
per_level_perf_context_enabled = other->per_level_perf_context_enabled;
#endif
return *this;
}
void PerfContext::Reset() {
#ifndef NPERF_CONTEXT
user_key_comparison_count = 0;
block_cache_hit_count = 0;
block_read_count = 0;
block_read_byte = 0;
block_read_time = 0;
block_cache_index_hit_count = 0;
block_cache_standalone_handle_count = 0;
block_cache_real_handle_count = 0;
index_block_read_count = 0;
block_cache_filter_hit_count = 0;
filter_block_read_count = 0;
compression_dict_block_read_count = 0;
secondary_cache_hit_count = 0;
compressed_sec_cache_insert_real_count = 0;
compressed_sec_cache_insert_dummy_count = 0;
compressed_sec_cache_uncompressed_bytes = 0;
compressed_sec_cache_compressed_bytes = 0;
block_checksum_time = 0;
block_decompress_time = 0;
get_read_bytes = 0;
multiget_read_bytes = 0;
iter_read_bytes = 0;
blob_cache_hit_count = 0;
blob_read_count = 0;
blob_read_byte = 0;
blob_read_time = 0;
blob_checksum_time = 0;
blob_decompress_time = 0;
internal_key_skipped_count = 0;
internal_delete_skipped_count = 0;
internal_recent_skipped_count = 0;
internal_merge_count = 0;
internal_merge_point_lookup_count = 0;
internal_range_del_reseek_count = 0;
write_wal_time = 0;
get_snapshot_time = 0;
get_from_memtable_time = 0;
get_from_memtable_count = 0;
get_post_process_time = 0;
get_from_output_files_time = 0;
seek_on_memtable_time = 0;
seek_on_memtable_count = 0;
next_on_memtable_count = 0;
prev_on_memtable_count = 0;
seek_child_seek_time = 0;
seek_child_seek_count = 0;
seek_min_heap_time = 0;
seek_internal_seek_time = 0;
find_next_user_entry_time = 0;
write_pre_and_post_process_time = 0;
write_memtable_time = 0;
write_delay_time = 0;
write_thread_wait_nanos = 0;
write_scheduling_flushes_compactions_time = 0;
db_mutex_lock_nanos = 0;
db_condition_wait_nanos = 0;
merge_operator_time_nanos = 0;
read_index_block_nanos = 0;
read_filter_block_nanos = 0;
new_table_block_iter_nanos = 0;
new_table_iterator_nanos = 0;
block_seek_nanos = 0;
find_table_nanos = 0;
bloom_memtable_hit_count = 0;
bloom_memtable_miss_count = 0;
bloom_sst_hit_count = 0;
bloom_sst_miss_count = 0;
key_lock_wait_time = 0;
key_lock_wait_count = 0;
env_new_sequential_file_nanos = 0;
env_new_random_access_file_nanos = 0;
env_new_writable_file_nanos = 0;
env_reuse_writable_file_nanos = 0;
env_new_random_rw_file_nanos = 0;
env_new_directory_nanos = 0;
env_file_exists_nanos = 0;
env_get_children_nanos = 0;
env_get_children_file_attributes_nanos = 0;
env_delete_file_nanos = 0;
env_create_dir_nanos = 0;
env_create_dir_if_missing_nanos = 0;
env_delete_dir_nanos = 0;
env_get_file_size_nanos = 0;
env_get_file_modification_time_nanos = 0;
env_rename_file_nanos = 0;
env_link_file_nanos = 0;
env_lock_file_nanos = 0;
env_unlock_file_nanos = 0;
env_new_logger_nanos = 0;
get_cpu_nanos = 0;
iter_next_cpu_nanos = 0;
iter_prev_cpu_nanos = 0;
iter_seek_cpu_nanos = 0;
iter_next_count = 0;
iter_prev_count = 0;
iter_seek_count = 0;
number_async_seek = 0;
#define EMIT_FIELDS(x) x = 0;
DEF_PERF_CONTEXT_METRICS(EMIT_FIELDS)
#undef EMIT_FIELDS
if (per_level_perf_context_enabled && level_to_perf_context) {
for (auto& kv : *level_to_perf_context) {
kv.second.Reset();
@ -509,28 +253,11 @@ void PerfContext::Reset() {
#endif
}
#define PERF_CONTEXT_OUTPUT(counter) \
if (!exclude_zero_counters || (counter > 0)) { \
ss << #counter << " = " << counter << ", "; \
}
#define PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER(counter) \
if (per_level_perf_context_enabled && level_to_perf_context) { \
ss << #counter << " = "; \
for (auto& kv : *level_to_perf_context) { \
if (!exclude_zero_counters || (kv.second.counter > 0)) { \
ss << kv.second.counter << "@level" << kv.first << ", "; \
} \
} \
}
void PerfContextByLevel::Reset() {
#ifndef NPERF_CONTEXT
bloom_filter_useful = 0;
bloom_filter_full_positive = 0;
bloom_filter_full_true_positive = 0;
block_cache_hit_count = 0;
block_cache_miss_count = 0;
#define EMIT_FIELDS(x) x = 0;
DEF_PERF_CONTEXT_LEVEL_METRICS(EMIT_FIELDS)
#undef EMIT_FIELDS
#endif
}
@ -540,109 +267,23 @@ std::string PerfContext::ToString(bool exclude_zero_counters) const {
return "";
#else
std::ostringstream ss;
PERF_CONTEXT_OUTPUT(user_key_comparison_count);
PERF_CONTEXT_OUTPUT(block_cache_hit_count);
PERF_CONTEXT_OUTPUT(block_read_count);
PERF_CONTEXT_OUTPUT(block_read_byte);
PERF_CONTEXT_OUTPUT(block_read_time);
PERF_CONTEXT_OUTPUT(block_cache_index_hit_count);
PERF_CONTEXT_OUTPUT(block_cache_standalone_handle_count);
PERF_CONTEXT_OUTPUT(block_cache_real_handle_count);
PERF_CONTEXT_OUTPUT(index_block_read_count);
PERF_CONTEXT_OUTPUT(block_cache_filter_hit_count);
PERF_CONTEXT_OUTPUT(filter_block_read_count);
PERF_CONTEXT_OUTPUT(compression_dict_block_read_count);
PERF_CONTEXT_OUTPUT(secondary_cache_hit_count);
PERF_CONTEXT_OUTPUT(compressed_sec_cache_insert_real_count);
PERF_CONTEXT_OUTPUT(compressed_sec_cache_insert_dummy_count);
PERF_CONTEXT_OUTPUT(compressed_sec_cache_uncompressed_bytes);
PERF_CONTEXT_OUTPUT(compressed_sec_cache_compressed_bytes);
PERF_CONTEXT_OUTPUT(block_checksum_time);
PERF_CONTEXT_OUTPUT(block_decompress_time);
PERF_CONTEXT_OUTPUT(get_read_bytes);
PERF_CONTEXT_OUTPUT(multiget_read_bytes);
PERF_CONTEXT_OUTPUT(iter_read_bytes);
PERF_CONTEXT_OUTPUT(blob_cache_hit_count);
PERF_CONTEXT_OUTPUT(blob_read_count);
PERF_CONTEXT_OUTPUT(blob_read_byte);
PERF_CONTEXT_OUTPUT(blob_read_time);
PERF_CONTEXT_OUTPUT(blob_checksum_time);
PERF_CONTEXT_OUTPUT(blob_decompress_time);
PERF_CONTEXT_OUTPUT(internal_key_skipped_count);
PERF_CONTEXT_OUTPUT(internal_delete_skipped_count);
PERF_CONTEXT_OUTPUT(internal_recent_skipped_count);
PERF_CONTEXT_OUTPUT(internal_merge_count);
PERF_CONTEXT_OUTPUT(internal_merge_point_lookup_count);
PERF_CONTEXT_OUTPUT(internal_range_del_reseek_count);
PERF_CONTEXT_OUTPUT(write_wal_time);
PERF_CONTEXT_OUTPUT(get_snapshot_time);
PERF_CONTEXT_OUTPUT(get_from_memtable_time);
PERF_CONTEXT_OUTPUT(get_from_memtable_count);
PERF_CONTEXT_OUTPUT(get_post_process_time);
PERF_CONTEXT_OUTPUT(get_from_output_files_time);
PERF_CONTEXT_OUTPUT(seek_on_memtable_time);
PERF_CONTEXT_OUTPUT(seek_on_memtable_count);
PERF_CONTEXT_OUTPUT(next_on_memtable_count);
PERF_CONTEXT_OUTPUT(prev_on_memtable_count);
PERF_CONTEXT_OUTPUT(seek_child_seek_time);
PERF_CONTEXT_OUTPUT(seek_child_seek_count);
PERF_CONTEXT_OUTPUT(seek_min_heap_time);
PERF_CONTEXT_OUTPUT(seek_internal_seek_time);
PERF_CONTEXT_OUTPUT(find_next_user_entry_time);
PERF_CONTEXT_OUTPUT(write_pre_and_post_process_time);
PERF_CONTEXT_OUTPUT(write_memtable_time);
PERF_CONTEXT_OUTPUT(write_thread_wait_nanos);
PERF_CONTEXT_OUTPUT(write_scheduling_flushes_compactions_time);
PERF_CONTEXT_OUTPUT(db_mutex_lock_nanos);
PERF_CONTEXT_OUTPUT(db_condition_wait_nanos);
PERF_CONTEXT_OUTPUT(merge_operator_time_nanos);
PERF_CONTEXT_OUTPUT(write_delay_time);
PERF_CONTEXT_OUTPUT(read_index_block_nanos);
PERF_CONTEXT_OUTPUT(read_filter_block_nanos);
PERF_CONTEXT_OUTPUT(new_table_block_iter_nanos);
PERF_CONTEXT_OUTPUT(new_table_iterator_nanos);
PERF_CONTEXT_OUTPUT(block_seek_nanos);
PERF_CONTEXT_OUTPUT(find_table_nanos);
PERF_CONTEXT_OUTPUT(bloom_memtable_hit_count);
PERF_CONTEXT_OUTPUT(bloom_memtable_miss_count);
PERF_CONTEXT_OUTPUT(bloom_sst_hit_count);
PERF_CONTEXT_OUTPUT(bloom_sst_miss_count);
PERF_CONTEXT_OUTPUT(key_lock_wait_time);
PERF_CONTEXT_OUTPUT(key_lock_wait_count);
PERF_CONTEXT_OUTPUT(env_new_sequential_file_nanos);
PERF_CONTEXT_OUTPUT(env_new_random_access_file_nanos);
PERF_CONTEXT_OUTPUT(env_new_writable_file_nanos);
PERF_CONTEXT_OUTPUT(env_reuse_writable_file_nanos);
PERF_CONTEXT_OUTPUT(env_new_random_rw_file_nanos);
PERF_CONTEXT_OUTPUT(env_new_directory_nanos);
PERF_CONTEXT_OUTPUT(env_file_exists_nanos);
PERF_CONTEXT_OUTPUT(env_get_children_nanos);
PERF_CONTEXT_OUTPUT(env_get_children_file_attributes_nanos);
PERF_CONTEXT_OUTPUT(env_delete_file_nanos);
PERF_CONTEXT_OUTPUT(env_create_dir_nanos);
PERF_CONTEXT_OUTPUT(env_create_dir_if_missing_nanos);
PERF_CONTEXT_OUTPUT(env_delete_dir_nanos);
PERF_CONTEXT_OUTPUT(env_get_file_size_nanos);
PERF_CONTEXT_OUTPUT(env_get_file_modification_time_nanos);
PERF_CONTEXT_OUTPUT(env_rename_file_nanos);
PERF_CONTEXT_OUTPUT(env_link_file_nanos);
PERF_CONTEXT_OUTPUT(env_lock_file_nanos);
PERF_CONTEXT_OUTPUT(env_unlock_file_nanos);
PERF_CONTEXT_OUTPUT(env_new_logger_nanos);
PERF_CONTEXT_OUTPUT(get_cpu_nanos);
PERF_CONTEXT_OUTPUT(iter_next_cpu_nanos);
PERF_CONTEXT_OUTPUT(iter_prev_cpu_nanos);
PERF_CONTEXT_OUTPUT(iter_seek_cpu_nanos);
PERF_CONTEXT_OUTPUT(iter_next_count);
PERF_CONTEXT_OUTPUT(iter_prev_count);
PERF_CONTEXT_OUTPUT(iter_seek_count);
PERF_CONTEXT_OUTPUT(number_async_seek);
PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER(bloom_filter_useful);
PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER(bloom_filter_full_positive);
PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER(bloom_filter_full_true_positive);
PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER(block_cache_hit_count);
PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER(block_cache_miss_count);
#define PERF_CONTEXT_OUTPUT(counter) \
if (!exclude_zero_counters || (counter > 0)) { \
ss << #counter << " = " << counter << ", "; \
}
DEF_PERF_CONTEXT_METRICS(PERF_CONTEXT_OUTPUT)
#undef PERF_CONTEXT_OUTPUT
if (per_level_perf_context_enabled && level_to_perf_context) {
#define PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER(counter) \
ss << #counter << " = "; \
for (auto& kv : *level_to_perf_context) { \
if (!exclude_zero_counters || (kv.second.counter > 0)) { \
ss << kv.second.counter << "@level" << kv.first << ", "; \
} \
}
DEF_PERF_CONTEXT_LEVEL_METRICS(PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER)
#undef PERF_CONTEXT_BY_LEVEL_OUTPUT_ONE_COUNTER
}
std::string str = ss.str();
str.erase(str.find_last_not_of(", ") + 1);
return str;

2
table/block_fetcher.cc
Unescape View File

@ -254,6 +254,7 @@ IOStatus BlockFetcher::ReadBlockContents() {
if (io_status_.ok()) {
if (file_->use_direct_io()) {
PERF_TIMER_GUARD(block_read_time);
PERF_CPU_TIMER_GUARD(block_read_cpu_time, nullptr);
io_status_ = file_->Read(
opts, handle_.offset(), block_size_with_trailer_, &slice_, nullptr,
&direct_io_buf_, read_options_.rate_limiter_priority);
@ -262,6 +263,7 @@ IOStatus BlockFetcher::ReadBlockContents() {
} else {
PrepareBufferForBlockFromFile();
PERF_TIMER_GUARD(block_read_time);
PERF_CPU_TIMER_GUARD(block_read_cpu_time, nullptr);
io_status_ = file_->Read(opts, handle_.offset(),
block_size_with_trailer_, &slice_, used_buf_,
nullptr, read_options_.rate_limiter_priority);

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