impala::MonotonicStopWatch Class Reference

#include <stopwatch.h>

Collaboration diagram for impala::MonotonicStopWatch:

Public Member Functions
	MonotonicStopWatch ()
void	Start ()
void	Stop ()
uint64_t	Reset ()
	Restarts the timer. Returns the elapsed time until this point. More...
uint64_t	ElapsedTime () const
	Returns time in nanosecond. More...

Private Attributes
timespec	start_
uint64_t	total_time_
bool	running_

Detailed Description

Stop watch for reporting elapsed time in nanosec based on CLOCK_MONOTONIC. It is as fast as Rdtsc. It is also accurate because it not affected by cpu frequency changes and it is not affected by user setting the system clock. CLOCK_MONOTONIC represents monotonic time since some unspecified starting point. It is good for computing elapsed time.

Definition at line 74 of file stopwatch.h.

Constructor & Destructor Documentation

impala::MonotonicStopWatch::MonotonicStopWatch ( )

inline

Definition at line 76 of file stopwatch.h.

References running_, and total_time_.

Member Function Documentation

uint64_t impala::MonotonicStopWatch::ElapsedTime ( ) const

inline

Returns time in nanosecond.

Definition at line 105 of file stopwatch.h.

References running_, start_, and total_time_.

Referenced by impala::Webserver::BeginRequestCallback(), impala::BlockingQueue< TRowBatch * >::BlockingGet(), impala::BlockingQueue< TRowBatch * >::BlockingPut(), impala::RuntimeProfile::EventSequence::ElapsedTime(), impala::ResourceBroker::Expand(), impala::PlanFragmentExecutor::FragmentComplete(), impala::CatalogServer::GatherCatalogUpdatesThread(), HandleBroadcast(), impala::ResourceBroker::LlamaRpc(), impala::RuntimeProfile::EventSequence::MarkEvent(), impala::StatestoreSubscriber::RecoveryModeChecker(), impala::ResourceBroker::Reserve(), Reset(), Send(), impala::Statestore::SendHeartbeat(), impala::Statestore::SendTopicUpdate(), Stop(), impala::ThreadCounterMeasurement::Stop(), impala::StatestoreSubscriber::UpdateState(), and impala::ParallelExecutor::Worker().

uint64_t impala::MonotonicStopWatch::Reset ( )

inline

Restarts the timer. Returns the elapsed time until this point.

Definition at line 96 of file stopwatch.h.

References ElapsedTime(), running_, and start_.

Referenced by impala::StatestoreSubscriber::Heartbeat(), and impala::StatestoreSubscriber::UpdateState().

void impala::MonotonicStopWatch::Start ( )

inline

Definition at line 81 of file stopwatch.h.

References running_, and start_.

Referenced by impala::Webserver::BeginRequestCallback(), impala::BlockingQueue< TRowBatch * >::BlockingGet(), impala::BlockingQueue< TRowBatch * >::BlockingPut(), impala::ResourceBroker::Expand(), impala::CatalogServer::GatherCatalogUpdatesThread(), HandleBroadcast(), impala::ResourceBroker::LlamaRpc(), impala::PlanFragmentExecutor::Prepare(), impala::StatestoreSubscriber::RecoveryModeChecker(), impala::StatestoreSubscriber::Register(), impala::ResourceBroker::Reserve(), Send(), impala::Statestore::SendHeartbeat(), impala::Statestore::SendTopicUpdate(), impala::RuntimeProfile::EventSequence::Start(), impala::ThreadCounterMeasurement::ThreadCounterMeasurement(), impala::StatestoreSubscriber::UpdateState(), and impala::ParallelExecutor::Worker().

void impala::MonotonicStopWatch::Stop ( )

inline

Definition at line 88 of file stopwatch.h.

References ElapsedTime(), running_, and total_time_.

Referenced by impala::BlockingQueue< TRowBatch * >::BlockingGet(), impala::BlockingQueue< TRowBatch * >::BlockingPut(), impala::PlanFragmentExecutor::FragmentComplete(), HandleBroadcast(), Send(), impala::ThreadCounterMeasurement::Stop(), and impala::StatestoreSubscriber::UpdateState().

Member Data Documentation

bool impala::MonotonicStopWatch::running_

private

Definition at line 116 of file stopwatch.h.

Referenced by ElapsedTime(), MonotonicStopWatch(), Reset(), Start(), and Stop().

timespec impala::MonotonicStopWatch::start_

private

Definition at line 114 of file stopwatch.h.

Referenced by ElapsedTime(), Reset(), and Start().

uint64_t impala::MonotonicStopWatch::total_time_

private

Definition at line 115 of file stopwatch.h.

Referenced by ElapsedTime(), MonotonicStopWatch(), and Stop().

---

The documentation for this class was generated from the following file:

• be/src/util/stopwatch.h