Package org.lwjgl.vulkan

Class EXTCalibratedTimestamps

java.lang.Object

org.lwjgl.vulkan.EXTCalibratedTimestamps

public class EXTCalibratedTimestamps
extends Object

This extension provides an interface to query calibrated timestamps obtained quasi simultaneously from two time domains.

Promotion to VK_KHR_calibrated_timestamps

All functionality in this extension is included in VK_KHR_calibrated_timestamps, with the suffix changed to KHR. The original enum names are still available as aliases of the KHR functionality.

Name String

VK_EXT_calibrated_timestamps

Extension Type

Device extension

Registered Extension Number

185

Revision

2

Extension and Version Dependencies

VK_KHR_get_physical_device_properties2 or Version 1.1

Deprecation State

• Promoted to VK_KHR_calibrated_timestamps extension

Contact

• Daniel Rakos drakos-amd

Extension Proposal

VK_EXT_calibrated_timestamps

Other Extension Metadata

Last Modified Date

2018-10-04

IP Status

No known IP claims.

Contributors

• Matthaeus G. Chajdas, AMD
• Alan Harrison, AMD
• Derrick Owens, AMD
• Daniel Rakos, AMD
• Faith Ekstrand, Intel
• Keith Packard, Valve

Field Summary

Fields

Modifier and Type	Field	Description
static final String	VK_EXT_CALIBRATED_TIMESTAMPS_EXTENSION_NAME	The extension name.
static final int	VK_EXT_CALIBRATED_TIMESTAMPS_SPEC_VERSION	The extension specification version.
static final int	VK_STRUCTURE_TYPE_CALIBRATED_TIMESTAMP_INFO_EXT	Extends VkStructureType.
static final int	VK_TIME_DOMAIN_CLOCK_MONOTONIC_EXT	Extends VkTimeDomainKHR.
static final int	VK_TIME_DOMAIN_CLOCK_MONOTONIC_KHR	VkTimeDomainKHR - Supported time domains
static final int	VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT	Extends VkTimeDomainKHR.
static final int	VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_KHR	VkTimeDomainKHR - Supported time domains
static final int	VK_TIME_DOMAIN_DEVICE_EXT	Extends VkTimeDomainKHR.
static final int	VK_TIME_DOMAIN_DEVICE_KHR	VkTimeDomainKHR - Supported time domains
static final int	VK_TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT	Extends VkTimeDomainKHR.
static final int	VK_TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_KHR	VkTimeDomainKHR - Supported time domains

Method Summary

Modifier and Type	Method	Description
static int	nvkGetCalibratedTimestampsEXT(org.lwjgl.vulkan.VkDevice device, int timestampCount, long pTimestampInfos, long pTimestamps, long pMaxDeviation)	Unsafe version of: GetCalibratedTimestampsEXT
static int	nvkGetPhysicalDeviceCalibrateableTimeDomainsEXT(org.lwjgl.vulkan.VkPhysicalDevice physicalDevice, long pTimeDomainCount, long pTimeDomains)	Unsafe version of: GetPhysicalDeviceCalibrateableTimeDomainsEXT
static int	vkGetCalibratedTimestampsEXT(org.lwjgl.vulkan.VkDevice device, VkCalibratedTimestampInfoKHR.Buffer pTimestampInfos, long[] pTimestamps, long[] pMaxDeviation)	Array version of: GetCalibratedTimestampsEXT
static int	vkGetCalibratedTimestampsEXT(org.lwjgl.vulkan.VkDevice device, VkCalibratedTimestampInfoKHR.Buffer pTimestampInfos, LongBuffer pTimestamps, LongBuffer pMaxDeviation)	See GetCalibratedTimestampsKHR.
static int	vkGetPhysicalDeviceCalibrateableTimeDomainsEXT(org.lwjgl.vulkan.VkPhysicalDevice physicalDevice, int[] pTimeDomainCount, int @Nullable [] pTimeDomains)	Array version of: GetPhysicalDeviceCalibrateableTimeDomainsEXT
static int	vkGetPhysicalDeviceCalibrateableTimeDomainsEXT(org.lwjgl.vulkan.VkPhysicalDevice physicalDevice, IntBuffer pTimeDomainCount, @Nullable IntBuffer pTimeDomains)	See GetPhysicalDeviceCalibrateableTimeDomainsKHR.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

VK_EXT_CALIBRATED_TIMESTAMPS_SPEC_VERSION

public static final int VK_EXT_CALIBRATED_TIMESTAMPS_SPEC_VERSION

The extension specification version.

See Also:

• Constant Field Values

VK_EXT_CALIBRATED_TIMESTAMPS_EXTENSION_NAME

public static final String VK_EXT_CALIBRATED_TIMESTAMPS_EXTENSION_NAME

The extension name.

See Also:

• Constant Field Values

VK_STRUCTURE_TYPE_CALIBRATED_TIMESTAMP_INFO_EXT

public static final int VK_STRUCTURE_TYPE_CALIBRATED_TIMESTAMP_INFO_EXT

Extends VkStructureType.

See Also:

• Constant Field Values

VK_TIME_DOMAIN_DEVICE_EXT

public static final int VK_TIME_DOMAIN_DEVICE_EXT

Extends VkTimeDomainKHR.

Enum values:

• TIME_DOMAIN_DEVICE_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT
• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT

See Also:

• Constant Field Values

VK_TIME_DOMAIN_CLOCK_MONOTONIC_EXT

public static final int VK_TIME_DOMAIN_CLOCK_MONOTONIC_EXT

Extends VkTimeDomainKHR.

Enum values:

• TIME_DOMAIN_DEVICE_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT
• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT

See Also:

• Constant Field Values

VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT

public static final int VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT

Extends VkTimeDomainKHR.

Enum values:

• TIME_DOMAIN_DEVICE_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT
• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT

See Also:

• Constant Field Values

VK_TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT

public static final int VK_TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT

Extends VkTimeDomainKHR.

Enum values:

• TIME_DOMAIN_DEVICE_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_EXT
• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT
• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT

See Also:

• Constant Field Values

VK_TIME_DOMAIN_DEVICE_KHR

public static final int VK_TIME_DOMAIN_DEVICE_KHR

VkTimeDomainKHR - Supported time domains

Description

• TIME_DOMAIN_DEVICE_KHR 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 or CmdWriteTimestamp2 and are defined to be incrementing according to the timestampPeriod of the device.
• TIME_DOMAIN_CLOCK_MONOTONIC_KHR 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:

Note

An implementation supporting VK_KHR_calibrated_timestamps or VK_EXT_calibrated_timestamps will use the same time domain for all its VkQueue so that timestamp values reported for TIME_DOMAIN_DEVICE_KHR can be matched to any timestamp captured through CmdWriteTimestamp or CmdWriteTimestamp2 .

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

• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_KHR 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:

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

• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_KHR 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:

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

See Also

VkCalibratedTimestampInfoKHR, GetPhysicalDeviceCalibrateableTimeDomainsEXT, GetPhysicalDeviceCalibrateableTimeDomainsKHR

See Also:

• Constant Field Values

VK_TIME_DOMAIN_CLOCK_MONOTONIC_KHR

public static final int VK_TIME_DOMAIN_CLOCK_MONOTONIC_KHR

VkTimeDomainKHR - Supported time domains

Description

• TIME_DOMAIN_DEVICE_KHR 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 or CmdWriteTimestamp2 and are defined to be incrementing according to the timestampPeriod of the device.
• TIME_DOMAIN_CLOCK_MONOTONIC_KHR 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:

Note

An implementation supporting VK_KHR_calibrated_timestamps or VK_EXT_calibrated_timestamps will use the same time domain for all its VkQueue so that timestamp values reported for TIME_DOMAIN_DEVICE_KHR can be matched to any timestamp captured through CmdWriteTimestamp or CmdWriteTimestamp2 .

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

• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_KHR 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:

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

• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_KHR 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:

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

See Also

VkCalibratedTimestampInfoKHR, GetPhysicalDeviceCalibrateableTimeDomainsEXT, GetPhysicalDeviceCalibrateableTimeDomainsKHR

See Also:

• Constant Field Values

VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_KHR

public static final int VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_KHR

VkTimeDomainKHR - Supported time domains

Description

• TIME_DOMAIN_DEVICE_KHR 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 or CmdWriteTimestamp2 and are defined to be incrementing according to the timestampPeriod of the device.
• TIME_DOMAIN_CLOCK_MONOTONIC_KHR 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:

Note

An implementation supporting VK_KHR_calibrated_timestamps or VK_EXT_calibrated_timestamps will use the same time domain for all its VkQueue so that timestamp values reported for TIME_DOMAIN_DEVICE_KHR can be matched to any timestamp captured through CmdWriteTimestamp or CmdWriteTimestamp2 .

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

• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_KHR 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:

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

• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_KHR 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:

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

See Also

VkCalibratedTimestampInfoKHR, GetPhysicalDeviceCalibrateableTimeDomainsEXT, GetPhysicalDeviceCalibrateableTimeDomainsKHR

See Also:

• Constant Field Values

VK_TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_KHR

public static final int VK_TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_KHR

VkTimeDomainKHR - Supported time domains

Description

• TIME_DOMAIN_DEVICE_KHR 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 or CmdWriteTimestamp2 and are defined to be incrementing according to the timestampPeriod of the device.
• TIME_DOMAIN_CLOCK_MONOTONIC_KHR 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:

Note

An implementation supporting VK_KHR_calibrated_timestamps or VK_EXT_calibrated_timestamps will use the same time domain for all its VkQueue so that timestamp values reported for TIME_DOMAIN_DEVICE_KHR can be matched to any timestamp captured through CmdWriteTimestamp or CmdWriteTimestamp2 .

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

• TIME_DOMAIN_CLOCK_MONOTONIC_RAW_KHR 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:

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

• TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_KHR 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:

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

See Also

VkCalibratedTimestampInfoKHR, GetPhysicalDeviceCalibrateableTimeDomainsEXT, GetPhysicalDeviceCalibrateableTimeDomainsKHR

See Also:

• Constant Field Values

Method Details

nvkGetPhysicalDeviceCalibrateableTimeDomainsEXT

public static int nvkGetPhysicalDeviceCalibrateableTimeDomainsEXT(org.lwjgl.vulkan.VkPhysicalDevice physicalDevice,
 long pTimeDomainCount,
 long pTimeDomains)

Unsafe version of: GetPhysicalDeviceCalibrateableTimeDomainsEXT

Parameters:

pTimeDomainCount - a pointer to an integer related to the number of calibrateable time domains available or queried, as described below.

vkGetPhysicalDeviceCalibrateableTimeDomainsEXT

public static int vkGetPhysicalDeviceCalibrateableTimeDomainsEXT(org.lwjgl.vulkan.VkPhysicalDevice physicalDevice,
 IntBuffer pTimeDomainCount,
 @Nullable IntBuffer pTimeDomains)

See GetPhysicalDeviceCalibrateableTimeDomainsKHR.

Parameters:

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

pTimeDomainCount - a pointer to an integer related to the number of calibrateable time domains available or queried, as described below.

pTimeDomains - either NULL or a pointer to an array of VkTimeDomainKHR values, indicating the supported calibrateable time domains.

nvkGetCalibratedTimestampsEXT

public static int nvkGetCalibratedTimestampsEXT(org.lwjgl.vulkan.VkDevice device,
 int timestampCount,
 long pTimestampInfos,
 long pTimestamps,
 long pMaxDeviation)

Unsafe version of: GetCalibratedTimestampsEXT

Parameters:

timestampCount - the number of timestamps to query.

vkGetCalibratedTimestampsEXT

public static int vkGetCalibratedTimestampsEXT(org.lwjgl.vulkan.VkDevice device,
 VkCalibratedTimestampInfoKHR.Buffer pTimestampInfos,
 LongBuffer pTimestamps,
 LongBuffer pMaxDeviation)

See GetCalibratedTimestampsKHR.

Parameters:

device - the logical device used to perform the query.

pTimestampInfos - a pointer to an array of timestampCount VkCalibratedTimestampInfoKHR structures, describing the time domains the calibrated timestamps should be captured from.

pTimestamps - a pointer to an array of timestampCount 64-bit unsigned integer values in which the requested calibrated timestamp values are returned.

pMaxDeviation - 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.

vkGetPhysicalDeviceCalibrateableTimeDomainsEXT

public static int vkGetPhysicalDeviceCalibrateableTimeDomainsEXT(org.lwjgl.vulkan.VkPhysicalDevice physicalDevice,
 int[] pTimeDomainCount,
 int @Nullable [] pTimeDomains)

Array version of: GetPhysicalDeviceCalibrateableTimeDomainsEXT

vkGetCalibratedTimestampsEXT

public static int vkGetCalibratedTimestampsEXT(org.lwjgl.vulkan.VkDevice device,
 VkCalibratedTimestampInfoKHR.Buffer pTimestampInfos,
 long[] pTimestamps,
 long[] pMaxDeviation)

Array version of: GetCalibratedTimestampsEXT