| name | 要对其进行采样的配置文件名称信息。 |
| sampler | The CustomSampler that the CommandBuffer uses for sampling. |
添加命令，以开始对配置文件进行采样。
Schedules a performance profiling sample to begin when the Command Buffer reaches this point. This is useful for measuring CPU and GPU time spent by one or more commands in the Command Buffer.
A profiling sample that starts with BeginSample must always end with a call to CommandBuffer.EndSample with the same argument.