HPP terrain tessellation sample reports wrong statistics

[SaschaWillems]

The terrain tessellations sample displays statistics using a pipeline statistics query:

The HPP version of that sample does the same, but displays wrong values:

When debugging, I can see the correct values in the HPP ones after getting the query pool results, but they seem to get lost between this and the display. I wasn't able to find out why.

Maybe you can take a look at this @asuessenbach?

[asuessenbach]

I'm sorry, but I can't repro this issue. The statistics look correct on my end. Maybe someone else can test this as well?

[SaschaWillems]

Thanks for testing this. I can actually also reproduce this on Android with my Pixel 4a. While the non hpp version displays proper statistics, the hpp one always shows the same (probably wrong) values.

[SaschaWillems]

As noted in #832 this issue is still present.

It only happens in the hpp version and for two completely different setups:

• My old setup with an RTX 2060 and Windows 10
• My new setup with an RTX 4070 and Windows 11

I expect a sync/timing problem, as it seems to be more visible with hight framertates. On another setup with an integrated Intel GPU where I can't get vsync to disable I always see correct values.

[asuessenbach]

As already noted, I can't repro this issue. If anybody else could check on his setup and report here?

[SaschaWillems]

Just to rule out anything related to my PC setup: I can also reproduce this on my Google Pixel 4a. It's actually even a bit different there: The HPP version of the sample always displays the same (wrong) values that never change, no matter where i look, whereas the non-HPP version works fine:

[SaschaWillems]

This is still happening for me, even with the recent change that limits gui updates.