gem5::TraceCPU::ElasticDataGen::InputStream Class Reference

The InputStream encapsulates a trace file and the internal buffers and populates GraphNodes based on the input. More...

Public Member Functions
	InputStream (const std::string &filename, const double time_multiplier)
	Create a trace input stream for a given file name.
void	reset ()
	Reset the stream such that it can be played once again.
bool	read (GraphNode *element)
	Attempt to read a trace element from the stream, and also notify the caller if the end of the file was reached.
uint32_t	getWindowSize () const
	Get window size from trace.
uint64_t	getMicroOpCount () const
	Get number of micro-ops modelled in the TraceCPU replay.

Private Attributes
ProtoInputStream	trace
	Input file stream for the protobuf trace.
const double	timeMultiplier
	A multiplier for the compute delays in the trace to modulate the Trace CPU frequency either up or down.
uint64_t	microOpCount
	Count of committed ops read from trace plus the filtered ops.
uint32_t	windowSize
	The window size that is read from the header of the protobuf trace and used to process the dependency trace.

Detailed Description

The InputStream encapsulates a trace file and the internal buffers and populates GraphNodes based on the input.

Definition at line 746 of file trace_cpu.hh.

Constructor & Destructor Documentation

InputStream()

gem5::TraceCPU::ElasticDataGen::InputStream::InputStream	(	const std::string &	filename,
		const double	time_multiplier )

Create a trace input stream for a given file name.

Parameters

filename	Path to the file to read from
time_multiplier	used to scale the compute delays

Definition at line 1205 of file trace_cpu.cc.

References gem5::sim_clock::Frequency, panic, ProtoInputStream::read(), trace, and windowSize.

Member Function Documentation

getMicroOpCount()

uint64_t gem5::TraceCPU::ElasticDataGen::InputStream::getMicroOpCount ( ) const

inline

Get number of micro-ops modelled in the TraceCPU replay.

Definition at line 800 of file trace_cpu.hh.

References microOpCount.

Referenced by gem5::TraceCPU::ElasticDataGen::getMicroOpCount().

getWindowSize()

uint32_t gem5::TraceCPU::ElasticDataGen::InputStream::getWindowSize ( ) const

inline

Get window size from trace.

Definition at line 797 of file trace_cpu.hh.

References windowSize.

read()

bool gem5::TraceCPU::ElasticDataGen::InputStream::read

(

GraphNode *

element

)

Attempt to read a trace element from the stream, and also notify the caller if the end of the file was reached.

Parameters

element	Trace element to populate
size	of register dependency array stored in the element

Returns

True if an element could be read successfully

Definition at line 1234 of file trace_cpu.cc.

References gem5::TraceCPU::ElasticDataGen::GraphNode::compDelay, gem5::TraceCPU::ElasticDataGen::GraphNode::flags, gem5::ArmISA::i, gem5::TraceCPU::ElasticDataGen::GraphNode::pc, gem5::TraceCPU::ElasticDataGen::GraphNode::physAddr, read(), gem5::TraceCPU::ElasticDataGen::GraphNode::regDep, gem5::TraceCPU::ElasticDataGen::GraphNode::robDep, gem5::TraceCPU::ElasticDataGen::GraphNode::robNum, gem5::TraceCPU::ElasticDataGen::GraphNode::seqNum, gem5::TraceCPU::ElasticDataGen::GraphNode::size, gem5::TraceCPU::ElasticDataGen::trace, gem5::TraceCPU::ElasticDataGen::GraphNode::type, and gem5::TraceCPU::ElasticDataGen::GraphNode::virtAddr.

Referenced by read(), and gem5::TraceCPU::ElasticDataGen::readNextWindow().

reset()

void gem5::TraceCPU::ElasticDataGen::InputStream::reset

(

)

Reset the stream such that it can be played once again.

Definition at line 1228 of file trace_cpu.cc.

References reset(), and gem5::TraceCPU::ElasticDataGen::trace.

Referenced by gem5::TraceCPU::ElasticDataGen::exit(), and reset().

Member Data Documentation

microOpCount

uint64_t gem5::TraceCPU::ElasticDataGen::InputStream::microOpCount

private

Count of committed ops read from trace plus the filtered ops.

Definition at line 761 of file trace_cpu.hh.

Referenced by getMicroOpCount().

timeMultiplier

const double gem5::TraceCPU::ElasticDataGen::InputStream::timeMultiplier

private

A multiplier for the compute delays in the trace to modulate the Trace CPU frequency either up or down.

The Trace CPU's clock domain frequency must also be set to match the expected result of frequency scaling.

Definition at line 758 of file trace_cpu.hh.

trace

ProtoInputStream gem5::TraceCPU::ElasticDataGen::InputStream::trace

private

Input file stream for the protobuf trace.

Definition at line 750 of file trace_cpu.hh.

Referenced by InputStream().

windowSize

uint32_t gem5::TraceCPU::ElasticDataGen::InputStream::windowSize

private

The window size that is read from the header of the protobuf trace and used to process the dependency trace.

Definition at line 767 of file trace_cpu.hh.

Referenced by getWindowSize(), and InputStream().

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

• cpu/trace/trace_cpu.hh
• cpu/trace/trace_cpu.cc