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. More...
void	reset ()
	Reset the stream such that it can be played once again. More...
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. More...
uint32_t	getWindowSize () const
	Get window size from trace. More...
uint64_t	getMicroOpCount () const
	Get number of micro-ops modelled in the TraceCPU replay. More...

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

Detailed Description

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

Definition at line 793 of file trace_cpu.hh.

Constructor & Destructor Documentation

InputStream()

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 1180 of file trace_cpu.cc.

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

Member Function Documentation

getMicroOpCount()

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

inline

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

Definition at line 849 of file trace_cpu.hh.

References microOpCount.

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

getWindowSize()

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

inline

Get window size from trace.

Definition at line 846 of file trace_cpu.hh.

References windowSize.

read()

bool 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 1210 of file trace_cpu.cc.

References TraceCPU::ElasticDataGen::GraphNode::clearRegDep(), TraceCPU::ElasticDataGen::GraphNode::clearRobDep(), TraceCPU::ElasticDataGen::GraphNode::compDelay, TraceCPU::ElasticDataGen::GraphNode::flags, ArmISA::i, ArmISA::j, ArmISA::MaxInstSrcRegs, TraceCPU::ElasticDataGen::GraphNode::maxRobDep, TraceCPU::ElasticDataGen::GraphNode::numRegDep, TraceCPU::ElasticDataGen::GraphNode::numRobDep, TraceCPU::ElasticDataGen::GraphNode::pc, TraceCPU::ElasticDataGen::GraphNode::physAddr, read(), TraceCPU::ElasticDataGen::GraphNode::regDep, TraceCPU::ElasticDataGen::GraphNode::robDep, TraceCPU::ElasticDataGen::GraphNode::robNum, TraceCPU::ElasticDataGen::GraphNode::seqNum, TraceCPU::ElasticDataGen::GraphNode::size, TraceCPU::ElasticDataGen::trace, TraceCPU::ElasticDataGen::GraphNode::type, and TraceCPU::ElasticDataGen::GraphNode::virtAddr.

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

reset()

void TraceCPU::ElasticDataGen::InputStream::reset

(

)

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

Definition at line 1204 of file trace_cpu.cc.

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

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

Member Data Documentation

microOpCount

uint64_t TraceCPU::ElasticDataGen::InputStream::microOpCount

private

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

Definition at line 810 of file trace_cpu.hh.

Referenced by getMicroOpCount().

timeMultiplier

const double 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 807 of file trace_cpu.hh.

trace

ProtoInputStream TraceCPU::ElasticDataGen::InputStream::trace

private

Input file stream for the protobuf trace.

Definition at line 799 of file trace_cpu.hh.

Referenced by InputStream().

windowSize

uint32_t 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 816 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