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make statistics forward-able

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Summary:
Make StatisticsImpl being able to forward stats to provided statistics
implementation. The main purpose is to allow us to collect internal
stats in the future even when user supplies custom statistics
implementation. It avoids intrumenting 2 sets of stats collection code.
One immediate use case is tuning advisor, which needs to collect some
internal stats, users may not be interested.

Test Plan:
ran db_bench and see stats show up at the end of run
Will run make all check since some tests rely on statistics

Reviewers: yhchiang, sdong, igor

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D20145
main
Lei Jin 11 years ago
parent 4a8f0c957c
commit 40fa8a4cd5
13 changed files with 216 additions and 166 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 2
      HISTORY.md
  2. 4
      db/compaction_picker.cc
  3. 116
      db/db_impl.cc
  4. 1
      db/db_impl.h
  5. 2
      db/db_iter.cc
  6. 3
      db/version_set.cc
  7. 4
      db/write_batch.cc
  8. 27
      include/rocksdb/statistics.h
  9. 3
      table/block_based_table_reader.cc
  10. 1
      util/options.cc
  11. 131
      util/statistics.cc
  12. 59
      util/statistics.h
  13. 29
      util/stop_watch.h

2
HISTORY.md
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@ -9,7 +9,7 @@
* DBOptions.db_paths now is a vector of a DBPath structure which indicates both of path and target size
* NewPlainTableFactory instead of bunch of parameters now accepts PlainTableOptions, which is defined in include/rocksdb/table.h
* Moved include/utilities/*.h to include/rocksdb/utilities/*.h
* Statistics APIs now take uint32_t as type instead of Tickers. Also make two access functions getTickerCount and histogramData const
## 3.3.0 (7/10/2014)
### New Features

4
db/compaction_picker.cc
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@ -622,8 +622,8 @@ Compaction* UniversalCompactionPicker::PickCompaction(Version* version,
c->bottommost_level_ = c->inputs_[0].files.back() == last_file;
// update statistics
MeasureTime(options_->statistics.get(), NUM_FILES_IN_SINGLE_COMPACTION,
c->inputs_[0].size());
MeasureTime(options_->statistics.get(),
NUM_FILES_IN_SINGLE_COMPACTION, c->inputs_[0].size());
// mark all the files that are being compacted
c->MarkFilesBeingCompacted(true);

116
db/db_impl.cc
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@ -334,6 +334,7 @@ DBImpl::DBImpl(const DBOptions& options, const std::string& dbname)
: env_(options.env),
dbname_(dbname),
options_(SanitizeOptions(dbname, options)),
stats_(options_.statistics.get()),
db_lock_(nullptr),
mutex_(options.use_adaptive_mutex),
shutting_down_(nullptr),
@ -1221,8 +1222,7 @@ Status DBImpl::Recover(
versions_->MarkFileNumberUsed(log);
s = RecoverLogFile(log, &max_sequence, read_only);
}
SetTickerCount(options_.statistics.get(), SEQUENCE_NUMBER,
versions_->LastSequence());
SetTickerCount(stats_, SEQUENCE_NUMBER, versions_->LastSequence());
}
for (auto cfd : *versions_->GetColumnFamilySet()) {
@ -1436,8 +1436,7 @@ Status DBImpl::WriteLevel0TableForRecovery(ColumnFamilyData* cfd, MemTable* mem,
cfd->internal_stats()->AddCompactionStats(level, stats);
cfd->internal_stats()->AddCFStats(
InternalStats::BYTES_FLUSHED, meta.fd.GetFileSize());
RecordTick(options_.statistics.get(), COMPACT_WRITE_BYTES,
meta.fd.GetFileSize());
RecordTick(stats_, COMPACT_WRITE_BYTES, meta.fd.GetFileSize());
return s;
}
@ -1528,8 +1527,7 @@ Status DBImpl::WriteLevel0Table(ColumnFamilyData* cfd,
cfd->internal_stats()->AddCompactionStats(level, stats);
cfd->internal_stats()->AddCFStats(
InternalStats::BYTES_FLUSHED, meta.fd.GetFileSize());
RecordTick(options_.statistics.get(), COMPACT_WRITE_BYTES,
meta.fd.GetFileSize());
RecordTick(stats_, COMPACT_WRITE_BYTES, meta.fd.GetFileSize());
return s;
}
@ -1933,17 +1931,14 @@ void DBImpl::MaybeScheduleFlushOrCompaction() {
}
void DBImpl::RecordFlushIOStats() {
RecordTick(options_.statistics.get(), FLUSH_WRITE_BYTES,
iostats_context.bytes_written);
RecordTick(stats_, FLUSH_WRITE_BYTES, iostats_context.bytes_written);
IOSTATS_RESET(bytes_written);
}
void DBImpl::RecordCompactionIOStats() {
RecordTick(options_.statistics.get(), COMPACT_READ_BYTES,
IOSTATS(bytes_read));
RecordTick(stats_, COMPACT_READ_BYTES, IOSTATS(bytes_read));
IOSTATS_RESET(bytes_read);
RecordTick(options_.statistics.get(), COMPACT_WRITE_BYTES,
IOSTATS(bytes_written));
RecordTick(stats_, COMPACT_WRITE_BYTES, IOSTATS(bytes_written));
IOSTATS_RESET(bytes_written);
}
@ -2206,7 +2201,7 @@ Status DBImpl::BackgroundCompaction(bool* madeProgress,
c.reset(cfd->PickCompaction(log_buffer));
if (c != nullptr) {
// update statistics
MeasureTime(options_.statistics.get(), NUM_FILES_IN_SINGLE_COMPACTION,
MeasureTime(stats_, NUM_FILES_IN_SINGLE_COMPACTION,
c->inputs(0)->size());
break;
}
@ -2431,12 +2426,10 @@ Status DBImpl::FinishCompactionOutputFile(CompactionState* compact,
// Finish and check for file errors
if (s.ok() && !options_.disableDataSync) {
if (options_.use_fsync) {
StopWatch sw(env_, options_.statistics.get(),
COMPACTION_OUTFILE_SYNC_MICROS, false);
StopWatch sw(env_, stats_, COMPACTION_OUTFILE_SYNC_MICROS);
s = compact->outfile->Fsync();
} else {
StopWatch sw(env_, options_.statistics.get(),
COMPACTION_OUTFILE_SYNC_MICROS, false);
StopWatch sw(env_, stats_, COMPACTION_OUTFILE_SYNC_MICROS);
s = compact->outfile->Sync();
}
}
@ -2668,7 +2661,7 @@ Status DBImpl::ProcessKeyValueCompaction(
ParseInternalKey(key, &ikey);
// no value associated with delete
value.clear();
RecordTick(options_.statistics.get(), COMPACTION_KEY_DROP_USER);
RecordTick(stats_, COMPACTION_KEY_DROP_USER);
} else if (value_changed) {
value = compaction_filter_value;
}
@ -2692,7 +2685,7 @@ Status DBImpl::ProcessKeyValueCompaction(
// TODO: why not > ?
assert(last_sequence_for_key >= ikey.sequence);
drop = true; // (A)
RecordTick(options_.statistics.get(), COMPACTION_KEY_DROP_NEWER_ENTRY);
RecordTick(stats_, COMPACTION_KEY_DROP_NEWER_ENTRY);
} else if (ikey.type == kTypeDeletion &&
ikey.sequence <= earliest_snapshot &&
compact->compaction->KeyNotExistsBeyondOutputLevel(ikey.user_key)) {
@ -2704,7 +2697,7 @@ Status DBImpl::ProcessKeyValueCompaction(
// few iterations of this loop (by rule (A) above).
// Therefore this deletion marker is obsolete and can be dropped.
drop = true;
RecordTick(options_.statistics.get(), COMPACTION_KEY_DROP_OBSOLETE);
RecordTick(stats_, COMPACTION_KEY_DROP_OBSOLETE);
} else if (ikey.type == kTypeMerge) {
// We know the merge type entry is not hidden, otherwise we would
// have hit (A)
@ -2894,7 +2887,7 @@ void DBImpl::CallCompactionFilterV2(CompactionState* compact,
// no value associated with delete
compact->existing_value_buf_[i].clear();
RecordTick(options_.statistics.get(), COMPACTION_KEY_DROP_USER);
RecordTick(stats_, COMPACTION_KEY_DROP_USER);
} else if (compact->value_changed_buf_[i]) {
compact->existing_value_buf_[i] =
Slice(compact->new_value_buf_[new_value_idx++]);
@ -3143,9 +3136,9 @@ Status DBImpl::DoCompactionWork(CompactionState* compact,
InternalStats::CompactionStats stats(1);
stats.micros = env_->NowMicros() - start_micros - imm_micros;
MeasureTime(options_.statistics.get(), COMPACTION_TIME, stats.micros);
stats.files_in_leveln = compact->compaction->num_input_files(0);
stats.files_in_levelnp1 = compact->compaction->num_input_files(1);
MeasureTime(stats_, COMPACTION_TIME, stats.micros);
int num_output_files = compact->outputs.size();
if (compact->builder != nullptr) {
@ -3306,7 +3299,7 @@ void DBImpl::InstallSuperVersion(ColumnFamilyData* cfd,
Status DBImpl::GetImpl(const ReadOptions& options,
ColumnFamilyHandle* column_family, const Slice& key,
std::string* value, bool* value_found) {
StopWatch sw(env_, options_.statistics.get(), DB_GET, false);
StopWatch sw(env_, stats_, DB_GET);
PERF_TIMER_AUTO(get_snapshot_time);
auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
@ -3341,16 +3334,16 @@ Status DBImpl::GetImpl(const ReadOptions& options,
PERF_TIMER_STOP(get_snapshot_time);
if (sv->mem->Get(lkey, value, &s, merge_context, *cfd->options())) {
// Done
RecordTick(options_.statistics.get(), MEMTABLE_HIT);
RecordTick(stats_, MEMTABLE_HIT);
} else if (sv->imm->Get(lkey, value, &s, merge_context, *cfd->options())) {
// Done
RecordTick(options_.statistics.get(), MEMTABLE_HIT);
RecordTick(stats_, MEMTABLE_HIT);
} else {
PERF_TIMER_START(get_from_output_files_time);
sv->current->Get(options, lkey, value, &s, &merge_context, value_found);
PERF_TIMER_STOP(get_from_output_files_time);
RecordTick(options_.statistics.get(), MEMTABLE_MISS);
RecordTick(stats_, MEMTABLE_MISS);
}
PERF_TIMER_START(get_post_process_time);
@ -3367,13 +3360,13 @@ Status DBImpl::GetImpl(const ReadOptions& options,
sv->Cleanup();
mutex_.Unlock();
delete sv;
RecordTick(options_.statistics.get(), NUMBER_SUPERVERSION_CLEANUPS);
RecordTick(stats_, NUMBER_SUPERVERSION_CLEANUPS);
}
RecordTick(options_.statistics.get(), NUMBER_SUPERVERSION_RELEASES);
RecordTick(stats_, NUMBER_SUPERVERSION_RELEASES);
}
RecordTick(options_.statistics.get(), NUMBER_KEYS_READ);
RecordTick(options_.statistics.get(), BYTES_READ, value->size());
RecordTick(stats_, NUMBER_KEYS_READ);
RecordTick(stats_, BYTES_READ, value->size());
PERF_TIMER_STOP(get_post_process_time);
return s;
}
@ -3383,7 +3376,7 @@ std::vector<Status> DBImpl::MultiGet(
const std::vector<ColumnFamilyHandle*>& column_family,
const std::vector<Slice>& keys, std::vector<std::string>* values) {
StopWatch sw(env_, options_.statistics.get(), DB_MULTIGET, false);
StopWatch sw(env_, stats_, DB_MULTIGET);
PERF_TIMER_AUTO(get_snapshot_time);
SequenceNumber snapshot;
@ -3481,9 +3474,9 @@ std::vector<Status> DBImpl::MultiGet(
delete mgd.second;
}
RecordTick(options_.statistics.get(), NUMBER_MULTIGET_CALLS);
RecordTick(options_.statistics.get(), NUMBER_MULTIGET_KEYS_READ, num_keys);
RecordTick(options_.statistics.get(), NUMBER_MULTIGET_BYTES_READ, bytes_read);
RecordTick(stats_, NUMBER_MULTIGET_CALLS);
RecordTick(stats_, NUMBER_MULTIGET_KEYS_READ, num_keys);
RecordTick(stats_, NUMBER_MULTIGET_BYTES_READ, bytes_read);
PERF_TIMER_STOP(get_post_process_time);
return stat_list;
@ -3798,7 +3791,7 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
}
if (!options.disableWAL) {
RecordTick(options_.statistics.get(), WRITE_WITH_WAL, 1);
RecordTick(stats_, WRITE_WITH_WAL);
default_cf_internal_stats_->AddDBStats(
InternalStats::WRITE_WITH_WAL, 1);
}
@ -3807,7 +3800,7 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
default_cf_internal_stats_->AddDBStats(
InternalStats::WRITE_DONE_BY_OTHER, 1);
mutex_.Unlock();
RecordTick(options_.statistics.get(), WRITE_DONE_BY_OTHER, 1);
RecordTick(stats_, WRITE_DONE_BY_OTHER);
return w.status;
} else if (timed_out) {
#ifndef NDEBUG
@ -3832,10 +3825,10 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
writers_.front()->cv.Signal();
}
mutex_.Unlock();
RecordTick(options_.statistics.get(), WRITE_TIMEDOUT, 1);
RecordTick(stats_, WRITE_TIMEDOUT);
return Status::TimedOut();
} else {
RecordTick(options_.statistics.get(), WRITE_DONE_BY_SELF, 1);
RecordTick(stats_, WRITE_DONE_BY_SELF);
default_cf_internal_stats_->AddDBStats(
InternalStats::WRITE_DONE_BY_SELF, 1);
}
@ -3925,11 +3918,8 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
last_sequence += my_batch_count;
const uint64_t batch_size = WriteBatchInternal::ByteSize(updates);
// Record statistics
RecordTick(options_.statistics.get(),
NUMBER_KEYS_WRITTEN, my_batch_count);
RecordTick(options_.statistics.get(),
BYTES_WRITTEN,
batch_size);
RecordTick(stats_, NUMBER_KEYS_WRITTEN, my_batch_count);
RecordTick(stats_, BYTES_WRITTEN, WriteBatchInternal::ByteSize(updates));
if (options.disableWAL) {
flush_on_destroy_ = true;
}
@ -3944,14 +3934,14 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
alive_log_files_.back().AddSize(log_entry.size());
log_empty_ = false;
log_size = log_entry.size();
RecordTick(options_.statistics.get(), WAL_FILE_SYNCED, 1);
RecordTick(options_.statistics.get(), WAL_FILE_BYTES, log_size);
RecordTick(stats_, WAL_FILE_SYNCED);
RecordTick(stats_, WAL_FILE_BYTES, log_size);
if (status.ok() && options.sync) {
if (options_.use_fsync) {
StopWatch(env_, options_.statistics.get(), WAL_FILE_SYNC_MICROS);
StopWatch(env_, stats_, WAL_FILE_SYNC_MICROS);
status = log_->file()->Fsync();
} else {
StopWatch(env_, options_.statistics.get(), WAL_FILE_SYNC_MICROS);
StopWatch(env_, stats_, WAL_FILE_SYNC_MICROS);
status = log_->file()->Sync();
}
}
@ -3972,8 +3962,7 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
PERF_TIMER_STOP(write_memtable_time);
SetTickerCount(options_.statistics.get(), SEQUENCE_NUMBER,
last_sequence);
SetTickerCount(stats_, SEQUENCE_NUMBER, last_sequence);
}
PERF_TIMER_START(write_pre_and_post_process_time);
if (updates == &tmp_batch_) {
@ -4019,7 +4008,7 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
mutex_.Unlock();
if (status.IsTimedOut()) {
RecordTick(options_.statistics.get(), WRITE_TIMEDOUT, 1);
RecordTick(stats_, WRITE_TIMEDOUT);
}
for (auto& sv : superversions_to_free) {
@ -4166,11 +4155,11 @@ Status DBImpl::MakeRoomForWrite(
mutex_.Unlock();
uint64_t delayed;
{
StopWatch sw(env_, options_.statistics.get(), STALL_L0_SLOWDOWN_COUNT);
StopWatch sw(env_, stats_, STALL_L0_SLOWDOWN_COUNT, true);
env_->SleepForMicroseconds(slowdown);
delayed = sw.ElapsedMicros();
}
RecordTick(options_.statistics.get(), STALL_L0_SLOWDOWN_MICROS, delayed);
RecordTick(stats_, STALL_L0_SLOWDOWN_MICROS, delayed);
allow_delay = false; // Do not delay a single write more than once
mutex_.Lock();
cfd->internal_stats()->AddCFStats(
@ -4194,8 +4183,7 @@ Status DBImpl::MakeRoomForWrite(
}
uint64_t stall;
{
StopWatch sw(env_, options_.statistics.get(),
STALL_MEMTABLE_COMPACTION_COUNT);
StopWatch sw(env_, stats_, STALL_MEMTABLE_COMPACTION_COUNT, true);
if (!has_timeout) {
bg_cv_.Wait();
} else {
@ -4203,8 +4191,7 @@ Status DBImpl::MakeRoomForWrite(
}
stall = sw.ElapsedMicros();
}
RecordTick(options_.statistics.get(),
STALL_MEMTABLE_COMPACTION_MICROS, stall);
RecordTick(stats_, STALL_MEMTABLE_COMPACTION_MICROS, stall);
cfd->internal_stats()->AddCFStats(
InternalStats::MEMTABLE_COMPACTION, stall);
} else if (cfd->NeedWaitForNumLevel0Files()) {
@ -4213,8 +4200,7 @@ Status DBImpl::MakeRoomForWrite(
cfd->GetName().c_str());
uint64_t stall;
{
StopWatch sw(env_, options_.statistics.get(),
STALL_L0_NUM_FILES_COUNT);
StopWatch sw(env_, stats_, STALL_L0_NUM_FILES_COUNT, true);
if (!has_timeout) {
bg_cv_.Wait();
} else {
@ -4222,8 +4208,7 @@ Status DBImpl::MakeRoomForWrite(
}
stall = sw.ElapsedMicros();
}
RecordTick(options_.statistics.get(),
STALL_L0_NUM_FILES_MICROS, stall);
RecordTick(stats_, STALL_L0_NUM_FILES_MICROS, stall);
cfd->internal_stats()->AddCFStats(
InternalStats::LEVEL0_NUM_FILES, stall);
} else if (allow_hard_rate_limit_delay && cfd->ExceedsHardRateLimit()) {
@ -4233,16 +4218,14 @@ Status DBImpl::MakeRoomForWrite(
mutex_.Unlock();
uint64_t delayed;
{
StopWatch sw(env_, options_.statistics.get(),
HARD_RATE_LIMIT_DELAY_COUNT);
StopWatch sw(env_, stats_, HARD_RATE_LIMIT_DELAY_COUNT, true);
env_->SleepForMicroseconds(1000);
delayed = sw.ElapsedMicros();
}
// Make sure the following value doesn't round to zero.
uint64_t rate_limit = std::max((delayed / 1000), (uint64_t) 1);
rate_limit_delay_millis += rate_limit;
RecordTick(options_.statistics.get(),
RATE_LIMIT_DELAY_MILLIS, rate_limit);
RecordTick(stats_, RATE_LIMIT_DELAY_MILLIS, rate_limit);
if (cfd->options()->rate_limit_delay_max_milliseconds > 0 &&
rate_limit_delay_millis >=
(unsigned)cfd->options()->rate_limit_delay_max_milliseconds) {
@ -4259,8 +4242,7 @@ Status DBImpl::MakeRoomForWrite(
cfd->options()->hard_rate_limit);
mutex_.Unlock();
{
StopWatch sw(env_, options_.statistics.get(),
SOFT_RATE_LIMIT_DELAY_COUNT);
StopWatch sw(env_, stats_, SOFT_RATE_LIMIT_DELAY_COUNT, true);
env_->SleepForMicroseconds(slowdown);
slowdown = sw.ElapsedMicros();
rate_limit_delay_millis += slowdown;
@ -4434,7 +4416,7 @@ Status DBImpl::GetUpdatesSince(
SequenceNumber seq, unique_ptr<TransactionLogIterator>* iter,
const TransactionLogIterator::ReadOptions& read_options) {
RecordTick(options_.statistics.get(), GET_UPDATES_SINCE_CALLS);
RecordTick(stats_, GET_UPDATES_SINCE_CALLS);
if (seq > versions_->LastSequence()) {
return Status::NotFound("Requested sequence not yet written in the db");
}

1
db/db_impl.h
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@ -290,6 +290,7 @@ class DBImpl : public DB {
const std::string dbname_;
unique_ptr<VersionSet> versions_;
const DBOptions options_;
Statistics* stats_;
Iterator* NewInternalIterator(const ReadOptions&, ColumnFamilyData* cfd,
SuperVersion* super_version,

2
db/db_iter.cc
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@ -70,7 +70,7 @@ class DBIter: public Iterator {
valid_(false),
current_entry_is_merged_(false),
statistics_(options.statistics.get()) {
RecordTick(statistics_, NO_ITERATORS, 1);
RecordTick(statistics_, NO_ITERATORS);
max_skip_ = options.max_sequential_skip_in_iterations;
}
virtual ~DBIter() {

3
db/version_set.cc
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@ -566,8 +566,7 @@ Status Version::GetTableProperties(std::shared_ptr<const TableProperties>* tp,
if (!s.ok()) {
return s;
}
RecordTick(options->statistics.get(),
NUMBER_DIRECT_LOAD_TABLE_PROPERTIES);
RecordTick(options->statistics.get(), NUMBER_DIRECT_LOAD_TABLE_PROPERTIES);
*tp = std::shared_ptr<const TableProperties>(raw_table_properties);
return s;

4
db/write_batch.cc
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@ -436,8 +436,8 @@ class MemTableInserter : public WriteBatch::Handler {
// Failed to merge!
RecordTick(options->statistics.get(), NUMBER_MERGE_FAILURES);
// Store the delta in memtable
perform_merge = false;
// Store the delta in memtable
perform_merge = false;
} else {
// 3) Add value to memtable
mem->Add(sequence_, kTypeValue, key, new_value);

27
include/rocksdb/statistics.h
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@ -20,12 +20,12 @@ namespace rocksdb {
* 1. Any ticker should be added before TICKER_ENUM_MAX.
* 2. Add a readable string in TickersNameMap below for the newly added ticker.
*/
enum Tickers {
enum Tickers : uint32_t {
// total block cache misses
// REQUIRES: BLOCK_CACHE_MISS == BLOCK_CACHE_INDEX_MISS +
// BLOCK_CACHE_FILTER_MISS +
// BLOCK_CACHE_DATA_MISS;
BLOCK_CACHE_MISS,
BLOCK_CACHE_MISS = 0,
// total block cache hit
// REQUIRES: BLOCK_CACHE_HIT == BLOCK_CACHE_INDEX_HIT +
// BLOCK_CACHE_FILTER_HIT +
@ -198,8 +198,8 @@ const std::vector<std::pair<Tickers, std::string>> TickersNameMap = {
* Add a string representation in HistogramsNameMap below
* And increment HISTOGRAM_ENUM_MAX
*/
enum Histograms {
DB_GET,
enum Histograms : uint32_t {
DB_GET = 0,
DB_WRITE,
COMPACTION_TIME,
TABLE_SYNC_MICROS,
@ -256,14 +256,21 @@ class Statistics {
public:
virtual ~Statistics() {}
virtual long getTickerCount(Tickers tickerType) = 0;
virtual void recordTick(Tickers tickerType, uint64_t count = 0) = 0;
virtual void setTickerCount(Tickers tickerType, uint64_t count) = 0;
virtual void measureTime(Histograms histogramType, uint64_t time) = 0;
virtual uint64_t getTickerCount(uint32_t tickerType) const = 0;
virtual void histogramData(uint32_t type,
HistogramData* const data) const = 0;
virtual void recordTick(uint32_t tickerType, uint64_t count = 0) = 0;
virtual void setTickerCount(uint32_t tickerType, uint64_t count) = 0;
virtual void measureTime(uint32_t histogramType, uint64_t time) = 0;
virtual void histogramData(Histograms type, HistogramData* const data) = 0;
// String representation of the statistic object.
std::string ToString();
virtual std::string ToString() const = 0;
// Override this function to disable particular histogram collection
virtual bool HistEnabledForType(uint32_t type) const {
return type < HISTOGRAM_ENUM_MAX;
}
};
// Create a concrete DBStatistics object

3
table/block_based_table_reader.cc
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@ -870,10 +870,9 @@ Iterator* BlockBasedTable::NewDataBlockIterator(Rep* rep,
statistics, ro, &block);
if (block.value == nullptr && !no_io && ro.fill_cache) {
Histograms histogram = READ_BLOCK_GET_MICROS;
Block* raw_block = nullptr;
{
StopWatch sw(rep->options.env, statistics, histogram);
StopWatch sw(rep->options.env, statistics, READ_BLOCK_GET_MICROS);
s = ReadBlockFromFile(rep->file.get(), rep->footer, ro, handle,
&raw_block, rep->options.env,
block_cache_compressed == nullptr);

1
util/options.cc
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@ -25,6 +25,7 @@
#include "rocksdb/table.h"
#include "rocksdb/table_properties.h"
#include "table/block_based_table_factory.h"
#include "util/statistics.h"
namespace rocksdb {

131
util/statistics.cc
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@ -5,43 +5,82 @@
//
#include "util/statistics.h"
#include "rocksdb/statistics.h"
#include "port/likely.h"
#include <algorithm>
#include <cstdio>
namespace rocksdb {
std::shared_ptr<Statistics> CreateDBStatistics() {
return std::make_shared<StatisticsImpl>();
return std::make_shared<StatisticsImpl>(nullptr, false);
}
StatisticsImpl::StatisticsImpl() {}
StatisticsImpl::StatisticsImpl(
std::shared_ptr<Statistics> stats,
bool enable_internal_stats)
: stats_shared_(stats),
stats_(stats.get()),
enable_internal_stats_(enable_internal_stats) {
}
StatisticsImpl::~StatisticsImpl() {}
long StatisticsImpl::getTickerCount(Tickers tickerType) {
assert(tickerType < TICKER_ENUM_MAX);
uint64_t StatisticsImpl::getTickerCount(uint32_t tickerType) const {
assert(
enable_internal_stats_ ?
tickerType < INTERNAL_TICKER_ENUM_MAX :
tickerType < TICKER_ENUM_MAX);
// Return its own ticker version
return tickers_[tickerType].value;
}
void StatisticsImpl::setTickerCount(Tickers tickerType, uint64_t count) {
assert(tickerType < TICKER_ENUM_MAX);
tickers_[tickerType].value = count;
void StatisticsImpl::histogramData(uint32_t histogramType,
HistogramData* const data) const {
assert(
enable_internal_stats_ ?
histogramType < INTERNAL_TICKER_ENUM_MAX :
histogramType < TICKER_ENUM_MAX);
// Return its own ticker version
histograms_[histogramType].Data(data);
}
void StatisticsImpl::recordTick(Tickers tickerType, uint64_t count) {
assert(tickerType < TICKER_ENUM_MAX);
tickers_[tickerType].value += count;
void StatisticsImpl::setTickerCount(uint32_t tickerType, uint64_t count) {
assert(
enable_internal_stats_ ?
tickerType < INTERNAL_TICKER_ENUM_MAX :
tickerType < TICKER_ENUM_MAX);
if (tickerType < TICKER_ENUM_MAX || enable_internal_stats_) {
tickers_[tickerType].value = count;
}
if (stats_ && tickerType < TICKER_ENUM_MAX) {
stats_->setTickerCount(tickerType, count);
}
}
void StatisticsImpl::measureTime(Histograms histogramType, uint64_t value) {
assert(histogramType < HISTOGRAM_ENUM_MAX);
histograms_[histogramType].Add(value);
void StatisticsImpl::recordTick(uint32_t tickerType, uint64_t count) {
assert(
enable_internal_stats_ ?
tickerType < INTERNAL_TICKER_ENUM_MAX :
tickerType < TICKER_ENUM_MAX);
if (tickerType < TICKER_ENUM_MAX || enable_internal_stats_) {
tickers_[tickerType].value += count;
}
if (stats_ && tickerType < TICKER_ENUM_MAX) {
stats_->recordTick(tickerType, count);
}
}
void StatisticsImpl::histogramData(Histograms histogramType,
HistogramData* const data) {
assert(histogramType < HISTOGRAM_ENUM_MAX);
histograms_[histogramType].Data(data);
void StatisticsImpl::measureTime(uint32_t histogramType, uint64_t value) {
assert(
enable_internal_stats_ ?
histogramType < INTERNAL_HISTOGRAM_ENUM_MAX :
histogramType < HISTOGRAM_ENUM_MAX);
if (histogramType < HISTOGRAM_ENUM_MAX || enable_internal_stats_) {
histograms_[histogramType].Add(value);
}
if (stats_ && histogramType < HISTOGRAM_ENUM_MAX) {
stats_->measureTime(histogramType, value);
}
}
namespace {
@ -49,46 +88,44 @@ namespace {
// a buffer size used for temp string buffers
const int kBufferSize = 200;
std::string HistogramToString (
Statistics* dbstats,
const Histograms& histogram_type,
const std::string& name) {
char buffer[kBufferSize];
HistogramData histogramData;
dbstats->histogramData(histogram_type, &histogramData);
snprintf(
buffer,
kBufferSize,
"%s statistics Percentiles :=> 50 : %f 95 : %f 99 : %f\n",
name.c_str(),
histogramData.median,
histogramData.percentile95,
histogramData.percentile99
);
return std::string(buffer);
};
std::string TickerToString(Statistics* dbstats, const Tickers& ticker,
const std::string& name) {
char buffer[kBufferSize];
snprintf(buffer, kBufferSize, "%s COUNT : %ld\n",
name.c_str(), dbstats->getTickerCount(ticker));
return std::string(buffer);
};
} // namespace
std::string Statistics::ToString() {
std::string StatisticsImpl::ToString() const {
std::string res;
res.reserve(20000);
for (const auto& t : TickersNameMap) {
res.append(TickerToString(this, t.first, t.second));
if (t.first < TICKER_ENUM_MAX || enable_internal_stats_) {
char buffer[kBufferSize];
snprintf(buffer, kBufferSize, "%s COUNT : %ld\n",
t.second.c_str(), getTickerCount(t.first));
res.append(buffer);
}
}
for (const auto& h : HistogramsNameMap) {
res.append(HistogramToString(this, h.first, h.second));
if (h.first < HISTOGRAM_ENUM_MAX || enable_internal_stats_) {
char buffer[kBufferSize];
HistogramData hData;
histogramData(h.first, &hData);
snprintf(
buffer,
kBufferSize,
"%s statistics Percentiles :=> 50 : %f 95 : %f 99 : %f\n",
h.second.c_str(),
hData.median,
hData.percentile95,
hData.percentile99);
res.append(buffer);
}
}
res.shrink_to_fit();
return res;
}
bool StatisticsImpl::HistEnabledForType(uint32_t type) const {
if (LIKELY(!enable_internal_stats_)) {
return type < HISTOGRAM_ENUM_MAX;
}
return true;
}
} // namespace rocksdb

59
util/statistics.h
Unescape View File

@ -5,29 +5,51 @@
//
#pragma once
#include "rocksdb/statistics.h"
#include "util/histogram.h"
#include "util/mutexlock.h"
#include "port/likely.h"
#include <vector>
#include <atomic>
#include <string>
#include "util/histogram.h"
#include "util/mutexlock.h"
#include "port/likely.h"
namespace rocksdb {
enum TickersInternal : uint32_t {
INTERNAL_TICKER_ENUM_START = TICKER_ENUM_MAX,
INTERNAL_TICKER_ENUM_MAX
};
enum HistogramsInternal : uint32_t {
INTERNAL_HISTOGRAM_START = HISTOGRAM_ENUM_MAX,
INTERNAL_HISTOGRAM_ENUM_MAX
};
class StatisticsImpl : public Statistics {
public:
StatisticsImpl();
StatisticsImpl(std::shared_ptr<Statistics> stats,
bool enable_internal_stats);
virtual ~StatisticsImpl();
virtual long getTickerCount(Tickers tickerType);
virtual void setTickerCount(Tickers tickerType, uint64_t count);
virtual void recordTick(Tickers tickerType, uint64_t count);
virtual void measureTime(Histograms histogramType, uint64_t value);
virtual void histogramData(Histograms histogramType,
HistogramData* const data);
virtual uint64_t getTickerCount(uint32_t ticker_type) const override;
virtual void histogramData(uint32_t histogram_type,
HistogramData* const data) const override;
virtual void setTickerCount(uint32_t ticker_type, uint64_t count) override;
virtual void recordTick(uint32_t ticker_type, uint64_t count) override;
virtual void measureTime(uint32_t histogram_type, uint64_t value) override;
virtual std::string ToString() const override;
virtual bool HistEnabledForType(uint32_t type) const override;
private:
std::shared_ptr<Statistics> stats_shared_;
Statistics* stats_;
bool enable_internal_stats_;
struct Ticker {
Ticker() : value(uint_fast64_t()) {}
@ -38,29 +60,30 @@ class StatisticsImpl : public Statistics {
char padding[64 - sizeof(std::atomic_uint_fast64_t)];
};
Ticker tickers_[TICKER_ENUM_MAX] __attribute__((aligned(64)));
HistogramImpl histograms_[HISTOGRAM_ENUM_MAX] __attribute__((aligned(64)));
Ticker tickers_[INTERNAL_TICKER_ENUM_MAX] __attribute__((aligned(64)));
HistogramImpl histograms_[INTERNAL_HISTOGRAM_ENUM_MAX]
__attribute__((aligned(64)));
};
// Utility functions
inline void MeasureTime(Statistics* statistics, Histograms histogramType,
inline void MeasureTime(Statistics* statistics, uint32_t histogram_type,
uint64_t value) {
if (statistics) {
statistics->measureTime(histogramType, value);
statistics->measureTime(histogram_type, value);
}
}
inline void RecordTick(Statistics* statistics, Tickers ticker,
inline void RecordTick(Statistics* statistics, uint32_t ticker_type,
uint64_t count = 1) {
if (statistics) {
statistics->recordTick(ticker, count);
statistics->recordTick(ticker_type, count);
}
}
inline void SetTickerCount(Statistics* statistics, Tickers ticker,
inline void SetTickerCount(Statistics* statistics, uint32_t ticker_type,
uint64_t count) {
if (statistics) {
statistics->setTickerCount(ticker, count);
statistics->setTickerCount(ticker_type, count);
}
}
}

29
util/stop_watch.h
Unescape View File

@ -12,30 +12,31 @@ namespace rocksdb {
// Records the statistic into the corresponding histogram.
class StopWatch {
public:
explicit StopWatch(
Env * const env,
Statistics* statistics = nullptr,
const Histograms histogram_name = DB_GET,
bool auto_start = true) :
env_(env),
start_time_((!auto_start && !statistics) ? 0 : env->NowMicros()),
StopWatch(Env * const env, Statistics* statistics,
const uint32_t hist_type, bool force_enable = false)
: env_(env),
statistics_(statistics),
histogram_name_(histogram_name) {}
hist_type_(hist_type),
enabled_(statistics && statistics->HistEnabledForType(hist_type)),
start_time_(enabled_ || force_enable ? env->NowMicros() : 0) {
}
uint64_t ElapsedMicros() const {
return env_->NowMicros() - start_time_;
}
~StopWatch() { MeasureTime(statistics_, histogram_name_, ElapsedMicros()); }
~StopWatch() {
if (enabled_) {
statistics_->measureTime(hist_type_, ElapsedMicros());
}
}
private:
Env* const env_;
const uint64_t start_time_;
Statistics* statistics_;
const Histograms histogram_name_;
const uint32_t hist_type_;
bool enabled_;
const uint64_t start_time_;
};
// a nano second precision stopwatch

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