Page 21 has some figures for preemption between the generations, which looks like it could be the switching delay for task preemption between a thread group and mid-thread preemption.
The before time periods are reminiscent of some of the early evaluations for PS4 GPU audio compute by Sony's audio engineer, with App 2 being in the same range. I would imagine he'd have been happier if the numbers given back then were closer to Gen 9's usecs versus the tend of msecs that Gen8 and the PS4 GPU (loaded latency) provided at the time.
The before time periods are reminiscent of some of the early evaluations for PS4 GPU audio compute by Sony's audio engineer, with App 2 being in the same range. I would imagine he'd have been happier if the numbers given back then were closer to Gen 9's usecs versus the tend of msecs that Gen8 and the PS4 GPU (loaded latency) provided at the time.