Function vkEnumeratePhysicalDeviceQueueFamilyPerformanceCountersByRegionARM 

pub unsafe extern "system" fn vkEnumeratePhysicalDeviceQueueFamilyPerformanceCountersByRegionARM(
    physicalDevice: VkPhysicalDevice,
    queueFamilyIndex: u32,
    pCounterCount: *mut u32,
    pCounters: *mut VkPerformanceCounterARM,
    pCounterDescriptions: *mut VkPerformanceCounterDescriptionARM,
) -> VkResult

Available if built with prototypes.