rocksdb/monitoring/perf_context_imp.h

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// Copyright (c) 2011-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).
//
#pragma once
#include "monitoring/perf_step_timer.h"
#include "rocksdb/perf_context.h"
#include "util/stop_watch.h"
namespace rocksdb {
#if defined(NPERF_CONTEXT) || !defined(ROCKSDB_SUPPORT_THREAD_LOCAL)
extern PerfContext perf_context;
#else
#if defined(OS_SOLARIS)
extern __thread PerfContext perf_context_;
#define perf_context (*get_perf_context());
#else
extern __thread PerfContext perf_context;
#endif
#endif
#if defined(NPERF_CONTEXT)
#define PERF_TIMER_GUARD(metric)
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#define PERF_CONDITIONAL_TIMER_FOR_MUTEX_GUARD(metric, condition)
#define PERF_TIMER_MEASURE(metric)
#define PERF_TIMER_STOP(metric)
#define PERF_TIMER_START(metric)
#define PERF_COUNTER_ADD(metric, value)
#else
// Stop the timer and update the metric
#define PERF_TIMER_STOP(metric) perf_step_timer_##metric.Stop();
#define PERF_TIMER_START(metric) perf_step_timer_##metric.Start();
// Declare and set start time of the timer
#define PERF_TIMER_GUARD(metric) \
PerfStepTimer perf_step_timer_##metric(&(perf_context.metric)); \
perf_step_timer_##metric.Start();
#define PERF_CONDITIONAL_TIMER_FOR_MUTEX_GUARD(metric, condition, stats, \
ticker_type) \
PerfStepTimer perf_step_timer_##metric(&(perf_context.metric), true, stats, \
ticker_type); \
if (condition) { \
perf_step_timer_##metric.Start(); \
}
// Update metric with time elapsed since last START. start time is reset
// to current timestamp.
#define PERF_TIMER_MEASURE(metric) perf_step_timer_##metric.Measure();
// Increase metric value
#define PERF_COUNTER_ADD(metric, value) \
if (perf_level >= PerfLevel::kEnableCount) { \
perf_context.metric += value; \
}
#endif
}