video_core: less waiting on the GPU caches' locks

- The texture and buffer caches' mutexes spin briefly before sleeping
  (Common::SpinRecursiveMutex): the GPU thread, the fencing thread and
  CPU write traps take them tens of thousands of times a second for
  microseconds, and a sleeping waiter's wake-up took longer than that.
  Title 1's GPU thread slept 7.7% of its time there, now 3.7%.
- Fences commit and pop texture and buffer downloads separately, and
  only when there are any (one fence per compute dispatch in Switch 2
  titles): the fencing thread no longer holds both caches while it
  copies buffer downloads.
- Inline uploads and pre-draw invalidation take the caches one at a
  time again: holding one while std::lock waited for the other waited
  longer.

0 files changed, 0 insertions, 0 deletions