kernel launch latency test..

[oscarbg]

nice to have like clpeak..

[allanmac]

@nihui / @oscarbg, I wrote a microbenchmark that captures the round trip time of a GPU submission and completion using several different submit-and-wait Vulkan mechanisms.

It's pretty straightforward now that VK_EXT_calibrated_timestamps appears to be universal.

Note that vkQueueWaitIdle(), vkWaitForFences(), and vkWaitSemaphores() (for timeline semaphores) can demonstrate different round-trip times because they may be implemented differently.

You can skim this code for some hints. The only thing that you need to watch out for is making sure the right clock domain is being used based on support in the driver and OS.

If I were to write it again, it would be even smaller.

[oscarbg]

@allanmac sorry wishing now also and seen didn't thankyou for your detailed post!!

any update on interest to implement?
while we have clpeak to measure if platform support OpenCL now that vkpeak includes bandwith tests seems the last remaining test remaining (well there is also mad24 benchmarks in clpeak)..
also a way to test Metal API kernel launch latency..