- To force any incomplete CAMetalDrawable presentations to complete,
don't force the creation of another transient drawable, as this can
stall the creation of future drawables. Instead, when a swapchain
is destroyed, or replaced by a new swapchain, set the CAMetalLayer
drawableSize, which will force presentation completion.
- Add presentation completion handler in command buffer scheduling
callback, move marking available to presentation completion handler,
and minimize mutex locking.
- MVKQueue::waitIdle() remove wait for swapchain presentations,
and remove callbacks to MVKQueue from drawable completions.
- MVKQueue::submit() don't bypass submitting a misconfigured submission,
so that semaphores and fences will be signalled, and ensure misconfigured
submissions are well behaved.
- Add MVKSwapchain::getCAMetalLayer() to streamline layer access (unrelated).
- Add MVKConfiguration::timestampPeriodLowPassAlpha, along with matching
MVK_CONFIG_TIMESTAMP_PERIOD_LOWPASS_ALPHA env var.
- Add MVKConfigMembers.def file to describe MVKConfiguration members,
to support consistent batch handling of members.
- Add env var & build settings MVK_CONFIG_DEBUG, plus legacy
MVK_CONFIG_ALLOW_METAL_EVENTS & MVK_CONFIG_ALLOW_METAL_FENCES.
- Simplify environment variable retrieval functions and macros.
- Rename MVKDevice::updateTimestampsAndPeriod() to updateTimestampPeriod().
- vkCmdBlitImage() ensure swizzle texture view is retained for life
of MTLCommandBuffer.
- vkQueuePresentKHR() use MTLCommandBuffer that retains references.
- Update MoltenVK version to 1.2.6.
- Calling nextDrawable may result in a nil drawable, or a drawable with no
pixel format. Attempt several times to retrieve a drawable with a valid
pixel format, and if unsuccessful, return an error from vkQueuePresentKHR()
and vkAcquireNextImageKHR(), to force swapchain to be re-created.
- Reorganize MVKQueuePresentSurfaceSubmission::execute() to detect drawable
with invalid format, attach MTLCommandBuffer completion handler just before
commit, and delay enqueuing MTLCommandBuffer until commit.
- Refactor mvkOSVersionIsAtLeast() for clarity (unrelated).
- Fix failure building on Xcode 14.
- Track frame interval statistics, regardless of whether performance
tracking is enabled.
- Determine wait time for swapchain presentations from frame intervals.
- MVKSwapchain call markFrameInterval() from within mutex lock.
- MVKDevice rename addActivityPerformance() to addPerformanceInterval()
and addActivityByteCount() to addPerformanceByteCount().
- Add documentation about performance being measured in milliseconds.
In a recent Metal regression, Metal sometimes does not trigger the
[CAMetalDrawable addPresentedHandler:] callback on the final few (1-3)
CAMetalDrawable presentations, and retains internal memory associated
with these CAMetalDrawables. This does not occur for any CAMetalDrawable
presentations prior to those final few.
Most apps typically don't care much what happens after the last few
CAMetalDrawables are presented, and typically end shortly after that.
However, for some apps, such as Vulkan CTS WSI tests, which serially create
potentially hundreds, or thousands, of CAMetalLayers and MTLDevices,these
retained device memory allocations can pile up and cause the CTS WSI tests
to stall, block, or crash.
This issue has proven very difficult to debug, or replicate in incrementally
controlled environments. It appears consistently in some scenarios, and never
in other, almost identical scenarios.
For example, the MoltenVK Cube demo consistently runs without encountering
this issue, but CTS WSI test dEQP-VK.wsi.macos.swapchain.render.basic
consistently triggers the issue. Both apps run almost identical Vulkan
command paths, and identical swapchain image presentation paths, and
result in GPU captures that have identical swapchain image presentations.
We may ultimately have to wait for Apple to fix the core issue, but this
update includes workarounds that helps in some cases. During vkQueueWaitIdle()
and vkDeviceWaitIdle(), wait a short while for any in-flight swapchain image
presentations to finish, and attempt to force completion by calling
MVKPresentableSwapchainImage::forcePresentationCompletion(), which releases
the current CAMetalDrawable, and attempts to retrieve a new one, to trigger
the callback on the current CAMetalDrawable.
In exploring possible work-arounds for this issue, this update adds significant
structural improvements in the handling of swapchains, and quite a bit of new
performance and logging functionality that is useful for debugging purposes.
- Add several additional performance trackers, available via logging,
or the mvk_private_api.h API.
- Rename MVKPerformanceTracker members, and refactor performance result
collection, to support tracking and logging memory use, or other measurements,
in addition to just durations.
- Redefine MVKQueuePerformance to add tracking separate performance metrics for
MTLCommandBuffer retrieval, encoding, and execution, plus swapchain presentation.
- Add MVKDevicePerformance as part of MVKPerformanceStatistics to track device
information, including GPU device memory allocated, and update device memory
results whenever performance content is requested.
- Add MVKConfigActivityPerformanceLoggingStyle::
MVK_CONFIG_ACTIVITY_PERFORMANCE_LOGGING_STYLE_DEVICE_LIFETIME_ACCUMULATE
to accumulate performance and memory results across multiple serial
invocations of VkDevices, during the lifetime of the app process. This
is useful for accumulating performance results across multiple CTS tests.
- Log destruction of VkDevice, VkPhysicalDevice, and VkInstance, to bookend
the corresponding logs performed upon their creation.
- Include consumed GPU memory in log when VkPhysicalDevice is destroyed.
- Add mvkGetAvailableMTLDevicesArray() to support consistency when retrieving
MTLDevices available on the system.
- Add mvkVkCommandName() to generically map command use to a command name.
- MVKDevice:
- Support MTLPhysicalDevice.recommendedMaxWorkingSetSize on iOS & tvOS.
- Include available and consumed GPU memory in log of GPU device at
VkInstance creation time.
- MVKQueue:
- Add handleMTLCommandBufferError() to handle errors for all
MTLCommandBuffer executions.
- Track time to retrieve a MTLCommandBuffer.
- If MTLCommandBuffer could not be retrieved during queue submission,
report error, signal queue submission completion, and return
VK_ERROR_OUT_OF_POOL_MEMORY.
- waitIdle() simplify to use [MTLCommandBuffer waitUntilCompleted],
plus also wait for in-flight presentations to complete, and attempt
to force them to complete if they are stuck.
- MVKPresentableSwapchainImage:
- Don't track presenting MTLCommandBuffer.
- Add limit on number of attempts to retrieve a drawable, and report
VK_ERROR_OUT_OF_POOL_MEMORY if drawable cannot be retrieved.
- Return VkResult from acquireAndSignalWhenAvailable() to notify upstream
if MTLCommandBuffer could not be created.
- Track presentation time.
- Notify MVKQueue when presentation has completed.
- Add forcePresentationCompletion(), which releases the current
CAMetalDrawable, and attempts to retrieve a new one, to trigger the
callback on the current CAMetalDrawable. Called when a swapchain is
destroyed, or by queue if waiting for presentation to complete stalls,
- If destroyed while in flight, stop tracking swapchain and
don't notify when presentation completes.
- MVKSwapchain:
- Track active swapchain in MVKSurface to check oldSwapchain
- Track MVKSurface to access layer and detect lost surface.
- Don't track layer and layer observer, since MVKSurface handles these.
- On destruction, wait until all in-flight presentable images have returned.
- Remove empty and unused releaseUndisplayedSurfaces() function.
- MVKSurface:
- Consolidate constructors into initLayer() function.
- Update logic to test for valid layer and to set up layer observer.
- MVKSemaphoreImpl:
- Add getReservationCount()
- MVKBaseObject:
- Add reportResult() and reportWarning() functions to support logging
and reporting Vulkan results that are not actual errors.
- Rename MVKCommandUse::kMVKCommandUseEndCommandBuffer to
kMVKCommandUseBeginCommandBuffer, since that's where it is used.
- Update MVK_CONFIGURATION_API_VERSION and MVK_PRIVATE_API_VERSION to 38.
- Cube Demo support running a maximum number of frames.
In the rare case where vertex attribute buffers are bound to MVKCommandEncoder,
are not used by first pipeline, but are used by a subsequent pipeline, and no
other bindings are changed, the MVKResourcesCommandEncoderState will not appear
to be dirty to the second pipeline, and the buffer will not be bound to Metal.
When reverting a binding to dirty if it is not used by a pipeline, also revert
the enclosing MVKResourcesCommandEncoderState to dirty state.
Update MoltenVK to version 1.2.6 (unrelated).
- Guard against Intel returning zero values for CPU & GPU timestamps.
- Apply lowpass filter on timestampPeriod updates, to avoid wild temporary
changes, particularly at startup before GPU has been really exercised.
- In MoltenVK Xcode projects, set iOS & tvOS deployment targets to 12.0,
to avoid warnings while building MoltenVK.
- Add DYLD_LIBRARY_PATH to runcts script, to ensure Vulkan and MoltenVK
libraries are found during CTS runs.
- Update Whats_New.md and MoltenVK_Runtime_UserGuide.md documents.
Xcode simulator always requires 256B buffer alignment, even when running
on Apple Silicon. Previously, it was assumed that Apple Silicon would use
it's native 16B buffer alignment.
The [MTLDevice sampleTimestamps:gpuTimestamp:] function turns out to be
synchronized with other queue activities, and can block GPU execution
if it is called between MTLCommandBuffer submissions. On non-Apple-Silicon
devices, it was called before and after every vkQueueSubmit() submission,
to track the correlation between GPU and CPU timestamps, and was delaying
the start of GPU work on the next submission (on Apple Silicon, both
CPU & GPU timestamps are specified in nanoseconds, and the call was bypassed).
Move timestamp correlation from vkQueueSubmit() to
vkGetPhysicalDeviceProperties(), where it is used to update
VkPhysicalDeviceLimits::timestampPeriod on non-Apple-Silicon devices.
Delegate MVKPhysicalDevice::getProperties(VkPhysicalDeviceProperties2*)
to MVKPhysicalDevice::getProperties(VkPhysicalDeviceProperties*), plus
minimize wasted effort if pNext is empty (unrelated).
Move the declaration of several MVKPhysicalDevice member structs to
potentially reduce member spacing (unrelated).
When compiling tessellation vertex shaders, MVKGraphicsPipeline
pass array of MVKMTLFunction instead of MTLFunctions to retain
MTLFunctions for duration of processing.
Needed to complete fix for #1874
We can't wait until getMTLComputeEncoder() is called to dirty the state,
because this call will be avoided by dirty checks themselves.
Those checks are comparing against leftover and now incorrect state since
the previous encoder has already ended.
It needs to be dirtied on encoder end.
- Remove Xcode 11 build from GitHub CI.
- Leave MVK_XCODE_12 guards in place to allow devs to possibly continue to
attempt to build existing MoltenVK code using Xcode 11, even though it's
not officially supported. Such devs may have to add their own additional
MVK_XCODE_12 guards for any Xcode 12 API features added after this change.
- Remove visionOS from multi-platform builds because it
requires Xcode 15+ and will abort a multi-platform build.
- Define TARGET_OS_XR for older SDK's.
- A number of SDK deprecation warnings remain when building for visionOS.
These cannot be removed without significant refactoring.
- Build visionOS dependencies for Release build by default.
- Fix local variable initialization warning (unrelated).
