92c1eb0291
Summary: This will allow us to disable them completely for iOS or for better performance Test Plan: will run make all check Reviewers: igor, haobo, dhruba Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D17511
89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
// Copyright (c) 2013, 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.
|
|
//
|
|
#pragma once
|
|
#include "rocksdb/perf_context.h"
|
|
#include "util/stop_watch.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
#if defined(NPERF_CONTEXT) || defined(IOS_CROSS_COMPILE)
|
|
|
|
#define PERF_TIMER_DECLARE()
|
|
#define PERF_TIMER_START(metric)
|
|
#define PERF_TIMER_AUTO(metric)
|
|
#define PERF_TIMER_MEASURE(metric)
|
|
#define PERF_TIMER_STOP(metric)
|
|
#define PERF_COUNTER_ADD(metric, value)
|
|
|
|
#else
|
|
|
|
extern __thread PerfLevel perf_level;
|
|
|
|
class PerfStepTimer {
|
|
public:
|
|
PerfStepTimer()
|
|
: enabled_(perf_level >= PerfLevel::kEnableTime),
|
|
env_(enabled_ ? Env::Default() : nullptr),
|
|
start_(0) {
|
|
}
|
|
|
|
void Start() {
|
|
if (enabled_) {
|
|
start_ = env_->NowNanos();
|
|
}
|
|
}
|
|
|
|
void Measure(uint64_t* metric) {
|
|
if (start_) {
|
|
uint64_t now = env_->NowNanos();
|
|
*metric += now - start_;
|
|
start_ = now;
|
|
}
|
|
}
|
|
|
|
void Stop(uint64_t* metric) {
|
|
if (start_) {
|
|
*metric += env_->NowNanos() - start_;
|
|
start_ = 0;
|
|
}
|
|
}
|
|
|
|
private:
|
|
const bool enabled_;
|
|
Env* const env_;
|
|
uint64_t start_;
|
|
};
|
|
|
|
// Declare the local timer object to be used later on
|
|
#define PERF_TIMER_DECLARE() \
|
|
PerfStepTimer perf_step_timer;
|
|
|
|
// Set start time of the timer
|
|
#define PERF_TIMER_START(metric) \
|
|
perf_step_timer.Start();
|
|
|
|
// Declare and set start time of the timer
|
|
#define PERF_TIMER_AUTO(metric) \
|
|
PerfStepTimer perf_step_timer; \
|
|
perf_step_timer.Start();
|
|
|
|
// Update metric with time elapsed since last START. start time is reset
|
|
// to current timestamp.
|
|
#define PERF_TIMER_MEASURE(metric) \
|
|
perf_step_timer.Measure(&(perf_context.metric));
|
|
|
|
// Update metric with time elapsed since last START. But start time is not set.
|
|
#define PERF_TIMER_STOP(metric) \
|
|
perf_step_timer.Stop(&(perf_context.metric));
|
|
|
|
// Increase metric value
|
|
#define PERF_COUNTER_ADD(metric, value) \
|
|
perf_context.metric += value;
|
|
|
|
#endif
|
|
|
|
}
|