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We see, the non-fragment and fragment workloads are not parellel.
"This expression defines the fragment queue utilization compared against the GPU active cycles. For GPU bound content it is expected that the GPU queues will process work in parallel, so the dominant queue should be close to 100% utilized. If no queue is dominant, but the GPU is close to 100% utilized, then there could be a serialization or dependency problem preventing better overlap across the queues." -- This is the document on the official web site. But i can not get the specific meaning of it.
So can you give some specific events to prevent parallel between vs and ps？
And what conditions are satisfied to parellel?