Instance Property

error

The error that occurred when the command buffer was executed.

Required.

Declaration

@property(readonly) NSError *error;

Discussion

This property is primarily for debugging. If the command buffer hasn't been executed yet, or if execution finished successfully, error is nil.

See Also

Obtaining Status and Timestamps

status

The current stage in the lifetime of the command buffer.

Required.

MTLCommandBufferStatus

The stages in the lifetime of the command buffer.

MTLCommandBufferErrorDomain

The error domain used by MTLCommandBuffer when returning command buffer execution errors.

MTLCommandBufferError

Error codes that indicate why the execution of the command buffer has failed. The error property contains the error code.

kernelStartTime

The host time, in seconds, when the CPU began scheduling this command buffer for execution.

Required.

kernelEndTime

The host time, in seconds, when the CPU finished scheduling this command buffer for execution.

Required.

GPUStartTime

The host time, in seconds, when the GPU began executing this command buffer.

Required.

GPUEndTime

The host time, in seconds, when the GPU finished executing this command buffer.

Required.