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Search: Posts Made By: Andrew Lauritzen
Forum: 3D Architectures & Chips 20-Aug-2014, 05:00
Replies: 108
Views: 10,376
Posted By Andrew Lauritzen
Sure, but we're talking about a case where not a...

Sure, but we're talking about a case where not a single hardware thread on a given execution unit has any work to do for many cycles. Stalled threads can't be reused for async compute, so it really...
Forum: 3D Architectures & Chips 20-Aug-2014, 00:08
Replies: 108
Views: 10,376
Posted By Andrew Lauritzen
I'm well aware of distributed scheduling, work...

I'm well aware of distributed scheduling, work stealing, etc. and have advocated it myself for many years. But there are always serial bottlenecks in there, even if it's just the atomic that you need...
Forum: 3D Architectures & Chips 19-Aug-2014, 18:23
Replies: 108
Views: 10,376
Posted By Andrew Lauritzen
Not convinced. It puts off the issue slightly on...

Not convinced. It puts off the issue slightly on some architectures, but it's hardly a holy grail as it does nothing to address the real thread of dependent work through the rendering pipeline. You...
Forum: 3D Architectures & Chips 19-Aug-2014, 16:17
Replies: 108
Views: 10,376
Posted By Andrew Lauritzen
On the one hand that looks like the most stark...

On the one hand that looks like the most stark example of big GPU/small CPU (i.e. the 15W 2 core + GT3 part) while the vast majority of parts are more skewed towards the CPU (4+2, 4+3, 2+2). I'm also...
Forum: 3D Architectures & Chips 18-Aug-2014, 23:21
Replies: 108
Views: 10,376
Posted By Andrew Lauritzen
I think when I did the math a while back consoles...

I think when I did the math a while back consoles were ~20:1 on GPU:CPU SP flops. Haswell SoCs (GT3e for the biggest GPU) are ~2:1 at best. r290 + 4790k is ~10:1. Of course HSW-E will shift that a...
Forum: 3D Hardware, Software & Output Devices 18-Aug-2014, 22:08
Replies: 55
Views: 3,447
Posted By Andrew Lauritzen
Everything has to go through WDDM to draw on the...

Everything has to go through WDDM to draw on the swap chain, etc. And the OS owns the GPU memory on Windows, so that includes OpenGL. See for instance:...
Forum: 3D Architectures & Chips 18-Aug-2014, 21:27
Replies: 108
Views: 10,376
Posted By Andrew Lauritzen
Sure, and for most GPUs it's similar. But it's a...

Sure, and for most GPUs it's similar. But it's a very "bad" core compared to a CPU as far as extracting IPC goes. And no, that's not just because "that code is bad" (although of course there's never...
Forum: 3D Hardware, Software & Output Devices 15-Aug-2014, 23:49
Replies: 47
Views: 8,627
Posted By Andrew Lauritzen
Thanks! Yeah it was fun to show off DX12 on a...

Thanks! Yeah it was fun to show off DX12 on a tablet :)


Probably doesn't surprise you that I can't really speak to that. Sorry.
Forum: Console Technology 09-Aug-2014, 21:04
Replies: 610
Views: 81,171
Posted By Andrew Lauritzen
Also true on Intel FWIW. NVIDIA is the only IHV I...

Also true on Intel FWIW. NVIDIA is the only IHV I know that actually packs the data, and I'm not even sure if they still do (probably have both options). APIs are a bit behind the times on this issue.
Forum: Processor & Chipset Technology 03-Aug-2014, 03:24
Replies: 146
Views: 20,071
Posted By Andrew Lauritzen
Skylake* guys... we've already had the two...

Skylake* guys... we've already had the two "*wells" :)
Forum: 3D Technology & Algorithms 03-Jul-2014, 01:25
Replies: 217
Views: 25,372
Posted By Andrew Lauritzen
Uhh, I'm not sure I buy that. I'm not a display...

Uhh, I'm not sure I buy that. I'm not a display pipe expert but my understanding is there are physically only N (2-3 or whatever) clock generators in most GPUs, hence the requirement to have...
Forum: 3D Technology & Algorithms 02-Jul-2014, 19:26
Replies: 217
Views: 25,372
Posted By Andrew Lauritzen
Wouldn't it be more likely related to the sync'd...

Wouldn't it be more likely related to the sync'd clock signal stuff that was part of the original restrictions for needing a DP monitor? i.e. I imagine if you had all display-port monitors it could...
Forum: 3D Technology & Algorithms 02-Jul-2014, 19:22
Replies: 3
Views: 1,923
Posted By Andrew Lauritzen
Probably is related to doing "blobby"-type...

Probably is related to doing "blobby"-type occlusion type things like your googling implies.
Forum: 3D Hardware, Software & Output Devices 30-Jun-2014, 21:58
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
PRT/tiled resources does not allocated pages on...

PRT/tiled resources does not allocated pages on the fly - all the allocating/mapping is still done from the CPU between frames, etc. Hitting real page faults or otherwise stopping GPU execution to...
Forum: 3D Hardware, Software & Output Devices 30-Jun-2014, 18:06
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
Even if the hardware supports haulting on a page...

Even if the hardware supports haulting on a page fault like that (it may or may not, I don't know), it's likely to be reeaaaallly slow. Definitely not something you want to be doing in the middle of...
Forum: 3D Hardware, Software & Output Devices 30-Jun-2014, 00:57
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
Yes, but you don't really have any good options...

Yes, but you don't really have any good options once you run out of memory. Basically in the case of "too much transparency" you just have to drop fragments. This obviously produces artefacts and...
Forum: 3D Hardware, Software & Output Devices 28-Jun-2014, 19:05
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
If a similar feature is available in DirectX...

If a similar feature is available in DirectX feature level 12, game developers will have to modify their code to use it (i.e. it won't just automatically start working). But yes in theory eventually...
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 23:57
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
Cool, yeah I think the smoke stuff was important...

Cool, yeah I think the smoke stuff was important enough for their desired look that they wanted to implement a general path - even if slower - for other GPUs, but I don't know the details.

Anyways...
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 23:28
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
I think I corrected you on this last time...

I think I corrected you on this last time (assuming they are what I think)... these are not Intel CPU-specific features (i.e. AVX2), they are Intel *GPU* features. i.e. they use pixel...
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 22:34
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
That's not what I said. I said in the case of the...

That's not what I said. I said in the case of the tessellation stuff they should be called out for it given that there was no real visual advantage (in the Crysis case that was pretty definitively...
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 20:04
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
Not intentionally! This is precisely why I've...

Not intentionally! This is precisely why I've just been asking you to clarify the situation here and, incidentally, why license files exist ;)
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 19:05
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
No issues, I have never made my feelings on that...

No issues, I have never made my feelings on that point a secret. Thanks for publicly acknowledging the situation; the only reason I kept bringing it back up is that no one from AMD had publicly...
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 17:27
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
People who think any for-profit company wouldn't...

People who think any for-profit company wouldn't do exactly the same thing given the opportunity are the ones being naive.


That's what this entire discussion is about... NVIDIA will happily...
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 16:39
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
If you don't see how this policy is in direct...

If you don't see how this policy is in direct contradiction to the rhetoric you've been spouting then you're in too deep... And yeah on this point I do have a clear agenda: to point out that you're...
Forum: 3D Hardware, Software & Output Devices 27-Jun-2014, 06:14
Replies: 373
Views: 32,661
Posted By Andrew Lauritzen
Which, as I've mentioned before, AMD still will...

Which, as I've mentioned before, AMD still will not allow other IHVs to post optimized versions of as Mr. Huddy knows first-hand :) AMD folks please correct me if you've changed your minds on this...
Showing results 1 to 25 of 500

 
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