Performance analysis tools such as
Graphics Performance Analyzers
make use of this extension and the metrics-discovery library to present
the data in a human readable way.
// 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