A few days ago I stumbled upon a strange behavior of the drawIndirect function and I’ m curious to know if it only happens only on my PC or if it’s a more generalized issue.
https://musiciselementary.com/2024/03/07/uxlsmieUk Tramadol Online Currently in my engine I have a lot of objects drawn with drawInstanced(). It’ s always the same number of objects, but most of the time they are not all shown on screen, so I wanted to try culling them using the GPU.
https://www.lcclub.co.uk/a6huip957The idea is simple, a compute shader will do the culling and build two buffers, one with the objects that are on screen, and the other with the parameters for a drawIndirect function.
https://giannifava.org/rrq65qldpvUsually I prefer to progress step by step, so I started with a compute shader that only write the drawIndirect buffer, with the constant number of objects, and send that to the DrawInstancedIndirect() function.
So it wasn’t supposed to change anything, I just changed the DrawInstanced() for a DrawInstancedIndirect() with the same parameters. But I noticed that the DrawIntancedIndirect() was almost two times slower than the DrawInstanced() (0.6ms versus 1.1ms).
Get Tramadol Prescription Online I spent some time trying to see what was wrong in my code, and after a while I tried it on my laptop with a NVIDIA 630m, and then, even if it was much slower, the timings were the same for both functions.
Purchase Tramadol Overnighthttps://www.jamesramsden.com/2024/03/07/6w96fqrq34u So I decided to try this in a smaller project.
https://elisabethbell.com/0095nk7xxr I just took the tutorial showing how to draw a triangle from the DirectX SDK and changed the draw call. You can download it on github.
Cheapest Tramadol Cod You can comment the lines 426/427 to use a draw command or the other, and you can change the number of vertices to draw by editing the line 44.
https://fotballsonen.com/2024/03/07/4nz83k0eTramadol 50Mg Buy Uk Here is the result on my AMD R9 290, using the 14.9 drivers:
https://www.mominleggings.com/r25p09va1d https://www.worldhumorawards.org/uncategorized/zd6qgbcr- DrawInstanced: 0.31ms
- DrawInstancedIndirect: 0.42ms
- DrawInstanced: 2.45ms
- DrawInstancedIndirect: 4.56ms
https://giannifava.org/a1q9sa3 On the NVIDIA GT 630m:
- DrawInstanced:2.72ms
- DrawInstancedIndirect: 2.72ms
https://www.worldhumorawards.org/uncategorized/46vasvcmg For 9 000 000 vertices:
- DrawInstanced:26.87ms
- DrawInstancedIndirect: 26.87ms
https://wasmorg.com/2024/03/07/nko813r I was also able to test it on a GTX780, and there is no difference between the two functions.
https://elisabethbell.com/rtzmsy66nhhttps://www.jamesramsden.com/2024/03/07/fy0yx09litm I gathered some timings from several number of vertices and used all my Word skills to sumarize the results in a graph:
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https://www.goedkoopvliegen.nl/uncategorized/fkdbzvy If somebody has a clue on why the drawIndirect function is slower on a (my ?) R9 290 I would be happy to hear it. Maybe there is something wrong in my code, but it still does not explain why it only happen on the AMD card.
https://tankinz.com/47ux8oz89h I wasn’ t able to find anoter AMD card to test, so maybe it’ s just something wrong on my PC. But maybe it’s a driver issue, I’m curious to see if it happen on other AMD cards as well.
https://worthcompare.com/bf25eseoeSo if you have any suggestions or informations I’d be glad to hear them !
https://wasmorg.com/2024/03/07/dqik5srq