Vulkan.Extensions.VK_EXT_calibrated_timestamps

Documentation

getPhysicalDeviceCalibrateableTimeDomainsEXT :: forall io. MonadIO io => PhysicalDevice -> io (Result, "timeDomains" ::: Vector TimeDomainEXT)

vkGetPhysicalDeviceCalibrateableTimeDomainsEXT - Query calibrateable time domains

Parameters

• physicalDevice is the physical device from which to query the set of calibrateable time domains.

• pTimeDomainCount is a pointer to an integer related to the number of calibrateable time domains available or queried, as described below.
• pTimeDomains is either NULL or a pointer to an array of TimeDomainEXT values, indicating the supported calibrateable time domains.

Description

If pTimeDomains is NULL, then the number of calibrateable time domains supported for the given physicalDevice is returned in pTimeDomainCount. Otherwise, pTimeDomainCount must point to a variable set by the user to the number of elements in the pTimeDomains array, and on return the variable is overwritten with the number of values actually written to pTimeDomains. If the value of pTimeDomainCount is less than the number of calibrateable time domains supported, at most pTimeDomainCount values will be written to pTimeDomains. If pTimeDomainCount is smaller than the number of calibrateable time domains supported for the given physicalDevice, INCOMPLETE will be returned instead of SUCCESS to indicate that not all the available values were returned.

Valid Usage (Implicit)

• physicalDevice must be a valid PhysicalDevice handle

• pTimeDomainCount must be a valid pointer to a uint32_t value
• If the value referenced by pTimeDomainCount is not 0, and pTimeDomains is not NULL, pTimeDomains must be a valid pointer to an array of pTimeDomainCount TimeDomainEXT values

Return Codes

Success

• SUCCESS
• INCOMPLETE

Failure

• ERROR_OUT_OF_HOST_MEMORY
• ERROR_OUT_OF_DEVICE_MEMORY

See Also

PhysicalDevice, TimeDomainEXT

getCalibratedTimestampsEXT :: forall io. MonadIO io => Device -> ("timestampInfos" ::: Vector CalibratedTimestampInfoEXT) -> io ("timestamps" ::: Vector Word64, "maxDeviation" ::: Word64)

vkGetCalibratedTimestampsEXT - Query calibrated timestamps

Parameters

• device is the logical device used to perform the query.

• timestampCount is the number of timestamps to query.
• pTimestampInfos is a pointer to an array of timestampCount CalibratedTimestampInfoEXT structures, describing the time domains the calibrated timestamps should be captured from.
• pTimestamps is a pointer to an array of timestampCount 64-bit unsigned integer values in which the requested calibrated timestamp values are returned.
• pMaxDeviation is a pointer to a 64-bit unsigned integer value in which the strictly positive maximum deviation, in nanoseconds, of the calibrated timestamp values is returned.

Description

Note

The maximum deviation may vary between calls to getCalibratedTimestampsEXT even for the same set of time domains due to implementation and platform specific reasons. It is the application’s responsibility to assess whether the returned maximum deviation makes the timestamp values suitable for any particular purpose and can choose to re-issue the timestamp calibration call pursuing a lower devation value.

Calibrated timestamp values can be extrapolated to estimate future coinciding timestamp values, however, depending on the nature of the time domains and other properties of the platform extrapolating values over a sufficiently long period of time may no longer be accurate enough to fit any particular purpose so applications are expected to re-calibrate the timestamps on a regular basis.

Return Codes

Success

• SUCCESS

Failure

• ERROR_OUT_OF_HOST_MEMORY
• ERROR_OUT_OF_DEVICE_MEMORY

See Also

CalibratedTimestampInfoEXT, Device

data CalibratedTimestampInfoEXT

VkCalibratedTimestampInfoEXT - Structure specifying the input parameters of a calibrated timestamp query

Valid Usage (Implicit)

See Also

StructureType, TimeDomainEXT, getCalibratedTimestampsEXT

Constructors

CalibratedTimestampInfoEXT

Fields

• timeDomain :: TimeDomainEXT

  timeDomain must be a valid TimeDomainEXT value

Instances

Show CalibratedTimestampInfoEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

showsPrec :: Int -> CalibratedTimestampInfoEXT -> ShowS

show :: CalibratedTimestampInfoEXT -> String

showList :: [CalibratedTimestampInfoEXT] -> ShowS

Storable CalibratedTimestampInfoEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

sizeOf :: CalibratedTimestampInfoEXT -> Int

alignment :: CalibratedTimestampInfoEXT -> Int

peekElemOff :: Ptr CalibratedTimestampInfoEXT -> Int -> IO CalibratedTimestampInfoEXT

pokeElemOff :: Ptr CalibratedTimestampInfoEXT -> Int -> CalibratedTimestampInfoEXT -> IO ()

peekByteOff :: Ptr b -> Int -> IO CalibratedTimestampInfoEXT

pokeByteOff :: Ptr b -> Int -> CalibratedTimestampInfoEXT -> IO ()

peek :: Ptr CalibratedTimestampInfoEXT -> IO CalibratedTimestampInfoEXT

poke :: Ptr CalibratedTimestampInfoEXT -> CalibratedTimestampInfoEXT -> IO ()

FromCStruct CalibratedTimestampInfoEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

peekCStruct :: Ptr CalibratedTimestampInfoEXT -> IO CalibratedTimestampInfoEXT

ToCStruct CalibratedTimestampInfoEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

withCStruct :: CalibratedTimestampInfoEXT -> (Ptr CalibratedTimestampInfoEXT -> IO b) -> IO b

pokeCStruct :: Ptr CalibratedTimestampInfoEXT -> CalibratedTimestampInfoEXT -> IO b -> IO b

withZeroCStruct :: (Ptr CalibratedTimestampInfoEXT -> IO b) -> IO b

pokeZeroCStruct :: Ptr CalibratedTimestampInfoEXT -> IO b -> IO b

cStructSize :: Int

cStructAlignment :: Int

Zero CalibratedTimestampInfoEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

zero :: CalibratedTimestampInfoEXT

newtype TimeDomainEXT

VkTimeDomainEXT - Supported time domains

Description

struct timespec tv;
clock_gettime(CLOCK_MONOTONIC, &tv);
return tv.tv_nsec + tv.tv_sec*1000000000ull;

struct timespec tv;
clock_gettime(CLOCK_MONOTONIC_RAW, &tv);
return tv.tv_nsec + tv.tv_sec*1000000000ull;

LARGE_INTEGER counter;
QueryPerformanceCounter(&counter);
return counter.QuadPart;

See Also

CalibratedTimestampInfoEXT, getPhysicalDeviceCalibrateableTimeDomainsEXT

Constructors

TimeDomainEXT Int32

Bundled Patterns

pattern TIME_DOMAIN_DEVICE_EXT :: TimeDomainEXT

TIME_DOMAIN_DEVICE_EXT specifies the device time domain. Timestamp values in this time domain use the same units and are comparable with device timestamp values captured using cmdWriteTimestamp and are defined to be incrementing according to the timestampPeriod of the device.

pattern TIME_DOMAIN_CLOCK_MONOTONIC_EXT :: TimeDomainEXT

TIME_DOMAIN_CLOCK_MONOTONIC_EXT specifies the CLOCK_MONOTONIC time domain available on POSIX platforms. Timestamp values in this time domain are in units of nanoseconds and are comparable with platform timestamp values captured using the POSIX clock_gettime API as computed by this example:

pattern TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT :: TimeDomainEXT

TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT specifies the CLOCK_MONOTONIC_RAW time domain available on POSIX platforms. Timestamp values in this time domain are in units of nanoseconds and are comparable with platform timestamp values captured using the POSIX clock_gettime API as computed by this example:

pattern TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT :: TimeDomainEXT

TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT specifies the performance counter (QPC) time domain available on Windows. Timestamp values in this time domain are in the same units as those provided by the Windows QueryPerformanceCounter API and are comparable with platform timestamp values captured using that API as computed by this example:

Instances

Eq TimeDomainEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

(==) :: TimeDomainEXT -> TimeDomainEXT -> Bool

(/=) :: TimeDomainEXT -> TimeDomainEXT -> Bool

Ord TimeDomainEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

compare :: TimeDomainEXT -> TimeDomainEXT -> Ordering

(<) :: TimeDomainEXT -> TimeDomainEXT -> Bool

(<=) :: TimeDomainEXT -> TimeDomainEXT -> Bool

(>) :: TimeDomainEXT -> TimeDomainEXT -> Bool

(>=) :: TimeDomainEXT -> TimeDomainEXT -> Bool

max :: TimeDomainEXT -> TimeDomainEXT -> TimeDomainEXT

min :: TimeDomainEXT -> TimeDomainEXT -> TimeDomainEXT

Read TimeDomainEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

readsPrec :: Int -> ReadS TimeDomainEXT

readList :: ReadS [TimeDomainEXT]

readPrec :: ReadPrec TimeDomainEXT

readListPrec :: ReadPrec [TimeDomainEXT]

Show TimeDomainEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

showsPrec :: Int -> TimeDomainEXT -> ShowS

show :: TimeDomainEXT -> String

showList :: [TimeDomainEXT] -> ShowS

Storable TimeDomainEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

sizeOf :: TimeDomainEXT -> Int

alignment :: TimeDomainEXT -> Int

peekElemOff :: Ptr TimeDomainEXT -> Int -> IO TimeDomainEXT

pokeElemOff :: Ptr TimeDomainEXT -> Int -> TimeDomainEXT -> IO ()

peekByteOff :: Ptr b -> Int -> IO TimeDomainEXT

pokeByteOff :: Ptr b -> Int -> TimeDomainEXT -> IO ()

peek :: Ptr TimeDomainEXT -> IO TimeDomainEXT

poke :: Ptr TimeDomainEXT -> TimeDomainEXT -> IO ()

Zero TimeDomainEXT

Defined in Vulkan.Extensions.VK_EXT_calibrated_timestamps

Methods

zero :: TimeDomainEXT

type EXT_CALIBRATED_TIMESTAMPS_SPEC_VERSION = 1

pattern EXT_CALIBRATED_TIMESTAMPS_SPEC_VERSION :: forall a. Integral a => a

type EXT_CALIBRATED_TIMESTAMPS_EXTENSION_NAME = "VK_EXT_calibrated_timestamps"

pattern EXT_CALIBRATED_TIMESTAMPS_EXTENSION_NAME :: forall a. (Eq a, IsString a) => a