Hello,
May I ask
What are the differences among
“command buffer submissions” and
“command buffer batches” and
“command buffer boundaries”
shown below ? (in the spec manual)
Command buffer submissions to a single queue respect submission order and other implicit
ordering guarantees, but otherwise may overlap or execute out of order. Other types of batches and
queue submissions against a single queue (e.g. sparse memory binding) have no implicit ordering
constraints with any other queue submission or batch. Additional explicit ordering constraints
between queue submissions and individual batches can be expressed with semaphores and fences.
Command buffer boundaries, both between primary command buffers of the same or different
batches or submissions as well as between primary and secondary command buffers, do not
introduce any additional ordering constraints. In other words, submitting the set of command
buffers (which can include executing secondary command buffers) between any semaphore or
fence operations execute the recorded commands as if they had all been recorded into a single
primary command buffer, except that the current state is reset on each boundary. Explicit ordering
constraints can be expressed with explicit synchronization primitives.