# VkPerformanceCounterUnitKHR(3) Manual Page

## Name

VkPerformanceCounterUnitKHR - Supported counter unit types

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## C Specification

Performance counters have an associated unit. This unit describes how to interpret the performance counter result.

The performance counter unit types which may be returned in VkPerformanceCounterKHR::`unit` are:

    // Provided by VK_KHR_performance_query
    typedef enum VkPerformanceCounterUnitKHR {
        VK_PERFORMANCE_COUNTER_UNIT_GENERIC_KHR = 0,
        VK_PERFORMANCE_COUNTER_UNIT_PERCENTAGE_KHR = 1,
        VK_PERFORMANCE_COUNTER_UNIT_NANOSECONDS_KHR = 2,
        VK_PERFORMANCE_COUNTER_UNIT_BYTES_KHR = 3,
        VK_PERFORMANCE_COUNTER_UNIT_BYTES_PER_SECOND_KHR = 4,
        VK_PERFORMANCE_COUNTER_UNIT_KELVIN_KHR = 5,
        VK_PERFORMANCE_COUNTER_UNIT_WATTS_KHR = 6,
        VK_PERFORMANCE_COUNTER_UNIT_VOLTS_KHR = 7,
        VK_PERFORMANCE_COUNTER_UNIT_AMPS_KHR = 8,
        VK_PERFORMANCE_COUNTER_UNIT_HERTZ_KHR = 9,
        VK_PERFORMANCE_COUNTER_UNIT_CYCLES_KHR = 10,
    } VkPerformanceCounterUnitKHR;

## Description

- `VK_PERFORMANCE_COUNTER_UNIT_GENERIC_KHR` - the performance counter unit is a generic data point.

- `VK_PERFORMANCE_COUNTER_UNIT_PERCENTAGE_KHR` - the performance counter unit is a percentage (%).

- `VK_PERFORMANCE_COUNTER_UNIT_NANOSECONDS_KHR` - the performance counter unit is a value of nanoseconds (ns).

- `VK_PERFORMANCE_COUNTER_UNIT_BYTES_KHR` - the performance counter unit is a value of bytes.

- `VK_PERFORMANCE_COUNTER_UNIT_BYTES_PER_SECOND_KHR` - the performance counter unit is a value of bytes/s.

- `VK_PERFORMANCE_COUNTER_UNIT_KELVIN_KHR` - the performance counter unit is a temperature reported in Kelvin.

- `VK_PERFORMANCE_COUNTER_UNIT_WATTS_KHR` - the performance counter unit is a value of watts (W).

- `VK_PERFORMANCE_COUNTER_UNIT_VOLTS_KHR` - the performance counter unit is a value of volts (V).

- `VK_PERFORMANCE_COUNTER_UNIT_AMPS_KHR` - the performance counter unit is a value of amps (A).

- `VK_PERFORMANCE_COUNTER_UNIT_HERTZ_KHR` - the performance counter unit is a value of hertz (Hz).

- `VK_PERFORMANCE_COUNTER_UNIT_CYCLES_KHR` - the performance counter unit is a value of cycles.

## See Also

VK_KHR_performance_query, VkPerformanceCounterKHR

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0