[SCdF]

It appears to be a real term? https://docs.vulkan.org/tutorial/latest/Synchronization/Asyn...

Very odd, but perhaps more familiar to graphics programmers? I will say I'd probably call it a stall, which is exactly what the Vulkan docs call it moments later, so :shrug:

[kibibu]

"bubble" used to be used a lot more when talking about very deep pipelines, eg Pentium 4 depth.

[tux3]

Or in the case of my poor Verilog, even very short pipelines :(

[alfiedotwtf]

And before that, graphics programmers called it vertical retrace :upsidedown:

[ralferoo]

I'm a rendering engineer and have used this term frequently.

It's actually a very common technique in rendering to not always be able to easily fill in the gaps, that we frequently deliberately introduce an extra frame of latency, so that the GPU is rendering jobs for the latter half of rendering passes for frame N+1 and the early half of rendering passes of frame N+2 while frame N is visible. This still means that a frame takes the same total GPU time to render, but means that the gaps between jobs on a single frame can be usefully filled with something else from the other.