impala::RuntimeProfile::EventSequence Class Reference

#include <runtime-profile.h>

Collaboration diagram for impala::RuntimeProfile::EventSequence:

Public Types
typedef std::pair< std::string, int64_t >	Event
	An Event is a <label, timestamp> pair. More...
typedef std::vector< Event >	EventList
	An EventList is a sequence of Events, in increasing timestamp order. More...

Public Member Functions
	EventSequence ()
	EventSequence (const std::vector< int64_t > &timestamps, const std::vector< std::string > &labels)
	Helper constructor for building from Thrift. More...
void	Start ()
	Starts the timer without resetting it. More...
void	MarkEvent (const std::string &label)
int64_t	ElapsedTime ()
void	GetEvents (std::vector< Event > *events)
void	ToThrift (TEventSequence *seq) const

Private Attributes
boost::mutex	lock_
	Protect access to events_. More...
EventList	events_
	Stored in increasing time order. More...
MonotonicStopWatch	sw_
	Timer which allows events to be timestamped when they are recorded. More...

Detailed Description

An EventSequence captures a sequence of events (each added by calling MarkEvent). Each event has a text label, and a time (measured relative to the moment Start() was called as t=0). It is useful for tracking the evolution of some serial process, such as the query lifecycle.

Definition at line 267 of file runtime-profile.h.

Member Typedef Documentation

typedef std::pair<std::string, int64_t> impala::RuntimeProfile::EventSequence::Event

An Event is a <label, timestamp> pair.

Definition at line 294 of file runtime-profile.h.

typedef std::vector<Event> impala::RuntimeProfile::EventSequence::EventList

An EventList is a sequence of Events, in increasing timestamp order.

Definition at line 297 of file runtime-profile.h.

Constructor & Destructor Documentation

impala::RuntimeProfile::EventSequence::EventSequence ( )

inline

Definition at line 269 of file runtime-profile.h.

impala::RuntimeProfile::EventSequence::EventSequence ( const std::vector< int64_t > &  timestamps, const std::vector< std::string > &  labels  )

inline

Helper constructor for building from Thrift.

Definition at line 272 of file runtime-profile.h.

References events_.

Member Function Documentation

int64_t impala::RuntimeProfile::EventSequence::ElapsedTime ( )

inline

Definition at line 291 of file runtime-profile.h.

References impala::MonotonicStopWatch::ElapsedTime(), and sw_.

void impala::RuntimeProfile::EventSequence::GetEvents ( std::vector< Event > *  events )

inline

Copies the member events_ into the supplied vector 'events'. The supplied vector 'events' is cleared before this.

Definition at line 301 of file runtime-profile.h.

References events_, and lock_.

Referenced by impala::TEST().

void impala::RuntimeProfile::EventSequence::MarkEvent ( const std::string &  label )

inline

Stores an event in sequence with the given label and the current time (relative to the first time Start() was called) as the timestamp.

Definition at line 286 of file runtime-profile.h.

References impala::MonotonicStopWatch::ElapsedTime(), events_, lock_, and sw_.

Referenced by impala::AdmissionController::AdmitQuery(), impala::ImpalaServer::QueryExecState::Cancel(), impala::ImpalaServer::QueryExecState::Done(), impala::ImpalaServer::QueryExecState::ExecQueryOrDmlRequest(), impala::TEST(), impala::ImpalaServer::QueryExecState::UpdateCatalog(), impala::ImpalaServer::QueryExecState::UpdateTableAndColumnStats(), impala::ImpalaServer::QueryExecState::WaitForChildQueries(), and impala::ScopedEvent::~ScopedEvent().

void impala::RuntimeProfile::EventSequence::Start ( )

inline

Starts the timer without resetting it.

Definition at line 281 of file runtime-profile.h.

References impala::MonotonicStopWatch::Start(), and sw_.

Referenced by impala::ImpalaServer::QueryExecState::QueryExecState().

void impala::RuntimeProfile::EventSequence::ToThrift

(

TEventSequence *

seq

)

const

Definition at line 888 of file runtime-profile.cc.

Member Data Documentation

EventList impala::RuntimeProfile::EventSequence::events_

private

Stored in increasing time order.

Definition at line 314 of file runtime-profile.h.

Referenced by EventSequence(), GetEvents(), and MarkEvent().

boost::mutex impala::RuntimeProfile::EventSequence::lock_

private

Protect access to events_.

Definition at line 311 of file runtime-profile.h.

Referenced by GetEvents(), and MarkEvent().

MonotonicStopWatch impala::RuntimeProfile::EventSequence::sw_

private

Timer which allows events to be timestamped when they are recorded.

Definition at line 317 of file runtime-profile.h.

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

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

• be/src/util/runtime-profile.h
• be/src/util/runtime-profile.cc