Detailed Description

A GPU timestamp query pool, used for GPU-side performance profiling.

Inheritance diagram for QueryPool:

Public Member Functions
auto	getCapacity () const

auto	getTimestampPeriodMs () const

virtual std::vector< uint64_t >	getResults (uint32_t firstQuery, uint32_t queryCount) const = 0

virtual	~QueryPool () = default

	QueryPool (const QueryPool &) = delete

QueryPool &	operator= (const QueryPool &) = delete

Protected Member Functions
	QueryPool (const uint32_t capacity, const double timestampPeriodMs)

Constructor & Destructor Documentation

virtual ~QueryPool ( )

virtualdefault

QueryPool ( const QueryPool & )

delete

inlineprotected

auto getCapacity ( ) const

inline

Returns the maximum number of timestamp slots in this pool.

virtual std::vector<uint64_t> getResults	(	uint32_t	firstQuery,
		uint32_t	queryCount
	)		const

pure virtual

Reads back resolved timestamp values from the host-visible buffer.

Parameters

firstQuery	Index of the first query slot to read.
queryCount	Number of consecutive slots to read.

Returns: A vector of raw 64-bit GPU tick values. Convert to ms with getTimestampPeriodMs().

Note: Must only be called after the command list containing the matching resolveQueryPool() call has fully finished executing on the GPU (i.e. after the associated Fence has been signaled).

auto getTimestampPeriodMs ( ) const

inline

Returns the period (in milliseconds) of one GPU clock tick. Multiply a raw tick difference by this value to get a duration in ms.

QueryPool& operator= ( const QueryPool & )

delete

uint32_t capacity

protected

double timestampPeriodMs

protected