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Registered Extension Number

211

Revision

2

Extension and Version Dependencies

  • Requires Vulkan 1.0

Special Use

Other Extension Metadata

Last Modified Date

2018-05-16

IP Status

No known IP claims.

Contributors
  • Lionel Landwerlin, Intel

  • Piotr Maciejewski, Intel

Description

This extension allows an application to capture performance data to be interpreted by a external application or library.

Such a library is available at : https://github.com/intel/metrics-discovery

Performance analysis tools such as GPA (https://software.intel.com/en-us/gpa) make use of this extension and the metrics-discovery library to present the data in a human readable way.

New Enum Constants

  • VK_INTEL_PERFORMANCE_QUERY_EXTENSION_NAME

  • VK_INTEL_PERFORMANCE_QUERY_SPEC_VERSION

  • Extending VkObjectType:

    • VK_OBJECT_TYPE_PERFORMANCE_CONFIGURATION_INTEL

  • Extending VkQueryType:

    • VK_QUERY_TYPE_PERFORMANCE_QUERY_INTEL

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_INITIALIZE_PERFORMANCE_API_INFO_INTEL

    • VK_STRUCTURE_TYPE_PERFORMANCE_CONFIGURATION_ACQUIRE_INFO_INTEL

    • VK_STRUCTURE_TYPE_PERFORMANCE_MARKER_INFO_INTEL

    • VK_STRUCTURE_TYPE_PERFORMANCE_OVERRIDE_INFO_INTEL

    • VK_STRUCTURE_TYPE_PERFORMANCE_STREAM_MARKER_INFO_INTEL

    • VK_STRUCTURE_TYPE_QUERY_POOL_PERFORMANCE_QUERY_CREATE_INFO_INTEL

Example Code

// A previously created device
VkDevice device;

// A queue derived from the device
VkQueue queue;

VkInitializePerformanceApiInfoINTEL performanceApiInfoIntel = {
  VK_STRUCTURE_TYPE_INITIALIZE_PERFORMANCE_API_INFO_INTEL,
  NULL,
  NULL
};

vkInitializePerformanceApiINTEL(
  device,
  &performanceApiInfoIntel);

VkQueryPoolPerformanceQueryCreateInfoINTEL queryPoolIntel = {
  VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO_INTEL,
  NULL,
  VK_QUERY_POOL_SAMPLING_MODE_MANUAL_INTEL,
};

VkQueryPoolCreateInfo queryPoolCreateInfo = {
  VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO,
  &queryPoolIntel,
  0,
  VK_QUERY_TYPE_PERFORMANCE_QUERY_INTEL,
  1,
  0
};

VkQueryPool queryPool;

VkResult result = vkCreateQueryPool(
  device,
  &queryPoolCreateInfo,
  NULL,
  &queryPool);

assert(VK_SUCCESS == result);

// A command buffer we want to record counters on
VkCommandBuffer commandBuffer;

VkCommandBufferBeginInfo commandBufferBeginInfo = {
  VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
  NULL,
  VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT,
  NULL
};

result = vkBeginCommandBuffer(commandBuffer, &commandBufferBeginInfo);

assert(VK_SUCCESS == result);

vkCmdResetQueryPool(
  commandBuffer,
  queryPool,
  0,
  1);

vkCmdBeginQuery(
  commandBuffer,
  queryPool,
  0,
  0);

// Perform the commands you want to get performance information on
// ...

// Perform a barrier to ensure all previous commands were complete before
// ending the query
vkCmdPipelineBarrier(commandBuffer,
  VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT,
  VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT,
  0,
  0,
  NULL,
  0,
  NULL,
  0,
  NULL);

vkCmdEndQuery(
  commandBuffer,
  queryPool,
  0);

result = vkEndCommandBuffer(commandBuffer);

assert(VK_SUCCESS == result);

VkPerformanceConfigurationAcquireInfoINTEL performanceConfigurationAcquireInfo = {
  VK_STRUCTURE_TYPE_PERFORMANCE_CONFIGURATION_ACQUIRE_INFO_INTEL,
  NULL,
  VK_PERFORMANCE_CONFIGURATION_TYPE_COMMAND_QUEUE_METRICS_DISCOVERY_ACTIVATED_INTEL
};

VkPerformanceConfigurationINTEL performanceConfigurationIntel;

result = vkAcquirePerformanceConfigurationINTEL(
  device,
  &performanceConfigurationAcquireInfo,
  &performanceConfigurationIntel);

vkQueueSetPerformanceConfigurationINTEL(queue, performanceConfigurationIntel);

assert(VK_SUCCESS == result);

// Submit the command buffer and wait for its completion
// ...

result = vkReleasePerformanceConfigurationINTEL(
  device,
  performanceConfigurationIntel);

assert(VK_SUCCESS == result);

// Get the report size from metrics-discovery's QueryReportSize

result = vkGetQueryPoolResults(
  device,
  queryPool,
  0, 1, QueryReportSize,
  data, QueryReportSize, 0);

assert(VK_SUCCESS == result);

// The data can then be passed back to metrics-discovery from which
// human readable values can be queried.

Version History

  • Revision 2, 2020-03-06 (Lionel Landwerlin)

    • Rename VkQueryPoolCreateInfoINTEL in VkQueryPoolPerformanceQueryCreateInfoINTEL

  • Revision 1, 2018-05-16 (Lionel Landwerlin)

    • Initial revision

See Also

Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.