Need more details on "Chrome Device Stages"

[GHGmc2]

ze_tracer

Chrome Device Stages mode provides alternative view for device queue where each kernel invocation is divided into stages: "appended", "submitted" and "execution".

What's the meaning of "appended" state? It means command groups are in the queue? or command groups had been submitted to compute command streamer, but command streamer has not submitted them to the engine?
The same to "submitted" state.

Thanks!

[anton-v-gorshkov]

Hi @GHGmc2,
appended state means kernel was added into the command list (e.g. on zeCommandListAppendLaunchKernel call),
submitted state means command list was added into the device queue (e.g. on zeCommandQueueExecuteCommandLists call).
In case of immediate command list, append and submit time will be equal.

[GHGmc2]

@anton-v-gorshkov, Thanks for the explanation. But is command list SYCL queue? and device queue is command streamer in the hardware?

[anton-v-gorshkov]

Yes, I believe it's good enough explanation.

[GHGmc2]

Got it, thanks!