# resolveCounterRange(_:) Transforms samples of a GPU’s counter set from the driver’s internal format to a standard Metal data structure. ``` func resolveCounterRange(_ range: Range) throws -> Data? ``` ## Parameters `range` A range that indicates which sample instances the method resolves in the counter sample buffer. ## Return Value A instance in Swift, or an instance in Objective-C, if the method successfully resolves the range of samples in the buffer; otherwise, `nil`. ## Discussion You can only call this method on a counter sample buffer that you create with [`MTLStorageMode.shared`](/documentation/Metal/MTLStorageMode/shared) (see [`storageMode`](/documentation/Metal/MTLCounterSampleBufferDescriptor/storageMode)). For an example of how and when to use this method, see [Converting a GPU’s counter data into a readable format](/documentation/Metal/converting-a-gpus-counter-data-into-a-readable-format). > Note: > The GPU stores ``doc://com.apple.metal/documentation/Metal/MTLCounterErrorValue`` in `destinationBuffer` each time it encounters an error resolving a sample. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)