GPU Conceptual Overview — Handmade Hero — Episode Guide

0:07Recap and glimpse into the future of streaming via a video capture card

2:06Run the game and note that Casey can see the game and we can't

3:00Recap where we're at

4:31Blackboard: GPUs

7:00Blackboard: How the CPU relates to the GPU

10:59Blackboard: A typical mobile setup

13:19Blackboard: The implications of the system RAM and graphics RAM being separated by a PCI bus, i.e. latency

15:39Blackboard: CPU vs GPU, historically

22:42Blackboard: A high level overview of GPU architecture

29:03Blackboard: How a GPU core works

31:38Blackboard: "Shader" != "CPU code"

33:05Blackboard: How if statments are executed on a GPU

36:46Blackboard: How loops are worked through on a GPU

37:51Blackboard: "Warp"^α

38:28Blackboard: Summarise what a GPU is

41:16Blackboard: How we program for the GPU

46:14Blackboard: "Pushbuffer"

53:26Blackboard: Plan for tomorrow

56:38Q&A

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56:38Q&A

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56:38Q&A

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57:04@ratchetfreak You can instead of two triangles use a single triangle twice as big. It avoids the overdraw at the diagonal

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57:04@ratchetfreak You can instead of two triangles use a single triangle twice as big. It avoids the overdraw at the diagonal

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57:04@ratchetfreak You can instead of two triangles use a single triangle twice as big. It avoids the overdraw at the diagonal

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58:33@kknewkles Quick CPU question: All it does on barebones physics level is run electrons through if-statements, right? (Go left, go right, etc., with transistors)

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58:33@kknewkles Quick CPU question: All it does on barebones physics level is run electrons through if-statements, right? (Go left, go right, etc., with transistors)

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58:33@kknewkles Quick CPU question: All it does on barebones physics level is run electrons through if-statements, right? (Go left, go right, etc., with transistors)

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59:34@NoRaD91 Can't you run a Xeon Phi as your main processor, or did they make them dedicated only? Not like price / performance makes sense there

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59:34@NoRaD91 Can't you run a Xeon Phi as your main processor, or did they make them dedicated only? Not like price / performance makes sense there

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59:34@NoRaD91 Can't you run a Xeon Phi as your main processor, or did they make them dedicated only? Not like price / performance makes sense there

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1:00:15@ChronalDragon What barriers are there currently from just using the CPU as a GPU?

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1:00:15@ChronalDragon What barriers are there currently from just using the CPU as a GPU?

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1:00:15@ChronalDragon What barriers are there currently from just using the CPU as a GPU?

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1:01:49@aceflameseer Can we make a "first person" 3D mode of the game, just for education?

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1:01:49@aceflameseer Can we make a "first person" 3D mode of the game, just for education?

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1:01:49@aceflameseer Can we make a "first person" 3D mode of the game, just for education?

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1:01:55@cubercaleb Where does the PS4 / XBone processor lie on the CPU / GPU spectrum?

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1:01:55@cubercaleb Where does the PS4 / XBone processor lie on the CPU / GPU spectrum?

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1:01:55@cubercaleb Where does the PS4 / XBone processor lie on the CPU / GPU spectrum?

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1:04:18@quartertron Intel has killed off many projects that made good money but had bad margins

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1:04:18@quartertron Intel has killed off many projects that made good money but had bad margins

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1:04:18@quartertron Intel has killed off many projects that made good money but had bad margins

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1:05:56@Longboolean I've been told that lots of graphics drivers optimize for specific games (at the driver level). How does this fit into the equation? How do those optimizations make some games run better?

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1:05:56@Longboolean I've been told that lots of graphics drivers optimize for specific games (at the driver level). How does this fit into the equation? How do those optimizations make some games run better?

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1:05:56@Longboolean I've been told that lots of graphics drivers optimize for specific games (at the driver level). How does this fit into the equation? How do those optimizations make some games run better?

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1:08:05@sssmcgrath Why does everyone good that works at Intel hate Intel, yet simultaneously Intel's engineering is so far ahead of everyone else's? It doesn't compute!

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1:08:05@sssmcgrath Why does everyone good that works at Intel hate Intel, yet simultaneously Intel's engineering is so far ahead of everyone else's? It doesn't compute!

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1:08:05@sssmcgrath Why does everyone good that works at Intel hate Intel, yet simultaneously Intel's engineering is so far ahead of everyone else's? It doesn't compute!

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1:08:36@garryjohanson What did you think about Larrabee?

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1:08:36@garryjohanson What did you think about Larrabee?

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1:08:36@garryjohanson What did you think about Larrabee?

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1:08:56@chr0n0kun Does Vulkan fix the problem with OpenGL of not being able to transfer buffer-objects between processes with separate address spaces?

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1:08:56@chr0n0kun Does Vulkan fix the problem with OpenGL of not being able to transfer buffer-objects between processes with separate address spaces?

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1:08:56@chr0n0kun Does Vulkan fix the problem with OpenGL of not being able to transfer buffer-objects between processes with separate address spaces?

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1:09:36@angus_holder Intel's compiler is meant to be really good, right?

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1:09:36@angus_holder Intel's compiler is meant to be really good, right?

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1:09:36@angus_holder Intel's compiler is meant to be really good, right?

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1:10:11@Andremm2 Can you give us some insight (without breaking any NDAs) how different from OpenGL console graphics APIs are?

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1:10:11@Andremm2 Can you give us some insight (without breaking any NDAs) how different from OpenGL console graphics APIs are?

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1:10:11@Andremm2 Can you give us some insight (without breaking any NDAs) how different from OpenGL console graphics APIs are?

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1:12:26@chr0n0kun Sharing objects between applications without CPU overhead

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1:12:26@chr0n0kun Sharing objects between applications without CPU overhead

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1:12:26@chr0n0kun Sharing objects between applications without CPU overhead

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1:12:43@kknewkles Why do you think there's no games about programming / hardware / history of PC / hardware? The domain is unimaginably rich

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1:12:43@kknewkles Why do you think there's no games about programming / hardware / history of PC / hardware? The domain is unimaginably rich

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1:12:43@kknewkles Why do you think there's no games about programming / hardware / history of PC / hardware? The domain is unimaginably rich

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1:13:22@hguleryuz How does GDDR RAM for GPU or concept of "memory chip designed specifically for GPU" enter into this picture?

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1:13:22@hguleryuz How does GDDR RAM for GPU or concept of "memory chip designed specifically for GPU" enter into this picture?

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1:13:22@hguleryuz How does GDDR RAM for GPU or concept of "memory chip designed specifically for GPU" enter into this picture?

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1:13:48Blackboard: The gist of GDDR

1:16:36@NoRaD91 Could you one day maybe do a pre / after-stream short summary about your thoughts on OS-design and what you would do differently given current hardware?

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1:16:36@NoRaD91 Could you one day maybe do a pre / after-stream short summary about your thoughts on OS-design and what you would do differently given current hardware?

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1:16:36@NoRaD91 Could you one day maybe do a pre / after-stream short summary about your thoughts on OS-design and what you would do differently given current hardware?

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1:16:57@kknewkles I mustered up one more. How come The Witness has 4GB RAM as minimum requirement? I don't doubt it has great optimization (as Jon is an apex-level programmer). Is it because nowadays everyone has 4 gigs at least and they thought it's unfeasible or too limiting to go below that? What can be the design behind that requirement?

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1:16:57@kknewkles I mustered up one more. How come The Witness has 4GB RAM as minimum requirement? I don't doubt it has great optimization (as Jon is an apex-level programmer). Is it because nowadays everyone has 4 gigs at least and they thought it's unfeasible or too limiting to go below that? What can be the design behind that requirement?

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1:16:57@kknewkles I mustered up one more. How come The Witness has 4GB RAM as minimum requirement? I don't doubt it has great optimization (as Jon is an apex-level programmer). Is it because nowadays everyone has 4 gigs at least and they thought it's unfeasible or too limiting to go below that? What can be the design behind that requirement?

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1:19:47@elxenoaizd Why does it always seem like PC games claim that they require much more hardware power than they need? Do they want the extra power - just in case something goes wrong - or what?

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1:19:47@elxenoaizd Why does it always seem like PC games claim that they require much more hardware power than they need? Do they want the extra power - just in case something goes wrong - or what?

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1:19:47@elxenoaizd Why does it always seem like PC games claim that they require much more hardware power than they need? Do they want the extra power - just in case something goes wrong - or what?

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1:20:59@chr0n0kun Having OS-level support for GPU resources for compute and graphics so that 3D graphics tools etc. can interoperate efficiently, e.g. in VFX production where you have lots of tools using the same data

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1:20:59@chr0n0kun Having OS-level support for GPU resources for compute and graphics so that 3D graphics tools etc. can interoperate efficiently, e.g. in VFX production where you have lots of tools using the same data

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1:20:59@chr0n0kun Having OS-level support for GPU resources for compute and graphics so that 3D graphics tools etc. can interoperate efficiently, e.g. in VFX production where you have lots of tools using the same data

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1:21:45@Longboolean What would be a disadvantage of having a big beefy cpu (if any) or are there none?

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1:21:45@Longboolean What would be a disadvantage of having a big beefy cpu (if any) or are there none?

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1:21:45@Longboolean What would be a disadvantage of having a big beefy cpu (if any) or are there none?

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1:22:00@Boorocks998 Have you seen that guy that is going to recreate Quake in a Handmade Hero style?

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1:22:00@Boorocks998 Have you seen that guy that is going to recreate Quake in a Handmade Hero style?

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1:22:00@Boorocks998 Have you seen that guy that is going to recreate Quake in a Handmade Hero style?

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1:22:21@pankupunka How long do you expect this project to take?

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1:22:21@pankupunka How long do you expect this project to take?

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1:22:21@pankupunka How long do you expect this project to take?

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1:22:48@kknewkles From what I get, Fallout 4 just allocates itself an 8 gig block. Abhorrent

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1:22:48@kknewkles From what I get, Fallout 4 just allocates itself an 8 gig block. Abhorrent

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1:22:48@kknewkles From what I get, Fallout 4 just allocates itself an 8 gig block. Abhorrent

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1:23:17@kil4h Quick question about strict aliasing due to your forum post (not defending it), but how would you propose compilers to understand that pointers do not overlap (to optimize loads and so on)? Not sure how we could improve generated code without having that kind of guarantee, assuming we need to still support old code

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1:23:17@kil4h Quick question about strict aliasing due to your forum post (not defending it), but how would you propose compilers to understand that pointers do not overlap (to optimize loads and so on)? Not sure how we could improve generated code without having that kind of guarantee, assuming we need to still support old code

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1:23:17@kil4h Quick question about strict aliasing due to your forum post (not defending it), but how would you propose compilers to understand that pointers do not overlap (to optimize loads and so on)? Not sure how we could improve generated code without having that kind of guarantee, assuming we need to still support old code

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1:25:27@Andremm2 Out of curiosity, back then when it came out, was GDI just a wrapper for OpenGL?

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1:25:27@Andremm2 Out of curiosity, back then when it came out, was GDI just a wrapper for OpenGL?

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1:25:27@Andremm2 Out of curiosity, back then when it came out, was GDI just a wrapper for OpenGL?

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1:26:29@cubercaleb Restrict doesn't seem to work with vs2013 / 2015

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1:26:29@cubercaleb Restrict doesn't seem to work with vs2013 / 2015

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1:26:29@cubercaleb Restrict doesn't seem to work with vs2013 / 2015

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1:26:48@NoRaD91 Isn't Restrict, like, stupid limited though? And you don't have Alias (one that's definitive at least)

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1:26:48@NoRaD91 Isn't Restrict, like, stupid limited though? And you don't have Alias (one that's definitive at least)

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1:26:48@NoRaD91 Isn't Restrict, like, stupid limited though? And you don't have Alias (one that's definitive at least)

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1:27:18@Neitchzehrer Why is it that games get more difficult to play as Windows OS gets more advanced, i.e. playing a game from Windows XP on Windows 7?

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1:27:18@Neitchzehrer Why is it that games get more difficult to play as Windows OS gets more advanced, i.e. playing a game from Windows XP on Windows 7?

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1:27:18@Neitchzehrer Why is it that games get more difficult to play as Windows OS gets more advanced, i.e. playing a game from Windows XP on Windows 7?

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1:28:00Wind down

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1:28:00Wind down

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1:28:00Wind down

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