sampleCounters(sampleBuffer:sampleIndex:barrier:)

Encodes a command to sample hardware counters, providing performance information.

Declaration

func sampleCounters(sampleBuffer: any MTLCounterSampleBuffer, sampleIndex: Int, barrier: Bool)

sampleBuffer:
An Mtlcountersamplebuffer instance that stores the GPU hardware data.
sampleIndex:
An index within sampleBuffer the command stores the data to.
barrier:
Whether or not the command inserts a barrier before sampling the counter’s data.
A barrier ensures that the commands you encode before this one complete before the GPU samples the hardware counters, but can negatively impact runtime performance.
Running this command without a barrier means the GPU can sample counters concurrently with other commands from the encoder.
The barrier parameter for the command has no impact on sampling commands from other passes.