tree ef5b04f057b0f3bc4fd75601ad7e37770d7b5145
parent 472bbbe604e6cd9f272e2bdc6806b2fda94ad759
author Lei Zhang <antiagainst@google.com> 1679426284 -0700
committer Lei Zhang <antiagainst@google.com> 1686716252 -0700

[metal] Enable real async execution on GPU

This commit drops `legacy_sync` path from Metal HAL driver, where
we were forcing waiting all semaphores before all queue execution.
This requires us to track lifetimes of resources involved in queue
execution better, particularly we need to make sure semaphores
and command buffers aren't released until they are not needed by
the GPU.