ceph/src/rocksdb/monitoring/iostats_context_imp.h

   1 //  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5 //
   6 #pragma once
   7 #include "monitoring/perf_step_timer.h"
   8 #include "rocksdb/iostats_context.h"
   9
  10 #ifdef ROCKSDB_SUPPORT_THREAD_LOCAL
  11 namespace ROCKSDB_NAMESPACE {
  12 extern __thread IOStatsContext iostats_context;
  13 }  // namespace ROCKSDB_NAMESPACE
  14
  15 // increment a specific counter by the specified value
  16 #define IOSTATS_ADD(metric, value) (iostats_context.metric += value)
  17
  18 // Increase metric value only when it is positive
  19 #define IOSTATS_ADD_IF_POSITIVE(metric, value)   \
  20   if (value > 0) { IOSTATS_ADD(metric, value); }
  21
  22 // reset a specific counter to zero
  23 #define IOSTATS_RESET(metric) (iostats_context.metric = 0)
  24
  25 // reset all counters to zero
  26 #define IOSTATS_RESET_ALL() (iostats_context.Reset())
  27
  28 #define IOSTATS_SET_THREAD_POOL_ID(value) \
  29   (iostats_context.thread_pool_id = value)
  30
  31 #define IOSTATS_THREAD_POOL_ID() (iostats_context.thread_pool_id)
  32
  33 #define IOSTATS(metric) (iostats_context.metric)
  34
  35 // Declare and set start time of the timer
  36 #define IOSTATS_TIMER_GUARD(metric)                                     \
  37   PerfStepTimer iostats_step_timer_##metric(&(iostats_context.metric)); \
  38   iostats_step_timer_##metric.Start();
  39
  40 // Declare and set start time of the timer
  41 #define IOSTATS_CPU_TIMER_GUARD(metric, env)           \
  42   PerfStepTimer iostats_step_timer_##metric(           \
  43       &(iostats_context.metric), env, true,            \
  44       PerfLevel::kEnableTimeAndCPUTimeExceptForMutex); \
  45   iostats_step_timer_##metric.Start();
  46
  47 #else  // ROCKSDB_SUPPORT_THREAD_LOCAL
  48
  49 #define IOSTATS_ADD(metric, value)
  50 #define IOSTATS_ADD_IF_POSITIVE(metric, value)
  51 #define IOSTATS_RESET(metric)
  52 #define IOSTATS_RESET_ALL()
  53 #define IOSTATS_SET_THREAD_POOL_ID(value)
  54 #define IOSTATS_THREAD_POOL_ID()
  55 #define IOSTATS(metric) 0
  56
  57 #define IOSTATS_TIMER_GUARD(metric)
  58 #define IOSTATS_CPU_TIMER_GUARD(metric, env)   static_cast<void>(env)
  59
  60 #endif  // ROCKSDB_SUPPORT_THREAD_LOCAL