d616ebea23
Summary: Closes https://github.com/facebook/rocksdb/pull/2226 Differential Revision: D4967547 Pulled By: siying fbshipit-source-id: dd3b58ae1e7a106ab6bb6f37ab5c88575b125ab4
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
// This source code is also licensed under the GPLv2 license found in the
|
|
// COPYING file in the root directory of this source tree.
|
|
//
|
|
#pragma once
|
|
#include "monitoring/perf_level_imp.h"
|
|
#include "rocksdb/env.h"
|
|
#include "util/stop_watch.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class PerfStepTimer {
|
|
public:
|
|
explicit PerfStepTimer(uint64_t* metric, bool for_mutex = false)
|
|
: enabled_(perf_level >= PerfLevel::kEnableTime ||
|
|
(!for_mutex && perf_level >= kEnableTimeExceptForMutex)),
|
|
env_(enabled_ ? Env::Default() : nullptr),
|
|
start_(0),
|
|
metric_(metric) {}
|
|
|
|
~PerfStepTimer() {
|
|
Stop();
|
|
}
|
|
|
|
void Start() {
|
|
if (enabled_) {
|
|
start_ = env_->NowNanos();
|
|
}
|
|
}
|
|
|
|
void Measure() {
|
|
if (start_) {
|
|
uint64_t now = env_->NowNanos();
|
|
*metric_ += now - start_;
|
|
start_ = now;
|
|
}
|
|
}
|
|
|
|
void Stop() {
|
|
if (start_) {
|
|
*metric_ += env_->NowNanos() - start_;
|
|
start_ = 0;
|
|
}
|
|
}
|
|
|
|
private:
|
|
const bool enabled_;
|
|
Env* const env_;
|
|
uint64_t start_;
|
|
uint64_t* metric_;
|
|
};
|
|
|
|
} // namespace rocksdb
|