Platform Layer Debug Events — Handmade Hero — Episode Guide

0:08Recap and plan for today

1:56Removing the obsolete debug_frame_end_info

2:15In place of that, we could have an array of counters for the platform layer translation unit

3:05But we can also write directly to the GlobalDebugTable

5:14Introducing manual_timed_block to have more flexibility recording events

8:28Implementing BEGIN_BLOCK and END_BLOCK

9:02Naming blocks so that we can pair BEGIN_ and END_BLOCKs

9:50We want to avoid creating scopes for the only purpose of timing what's inside

10:13Let's write the usage code first

13:30Naming also the END_BLOCKs

15:03Implementing the named BEGIN_BLOCK

18:34Implementing the named END_BLOCK

19:47Renaming TIMED_BLOCK as TIMED_FUNCTION

20:57Making the code compile after all the changes to the debug system

22:58Reintroducing TIMED_BLOCK and consolidating it with TIMED_FUNCTION

26:00There's a compilation problem related to BEGIN_BLOCK

27:32Debugging the macro by commenting parts of it out

28:06The problem was one of conflicting names

28:56Grabbing the GlobalDebugTable at DLL-load time

30:13Changing the type of the global debug table to be a pointer

32:08Introducing a placeholder GlobalDebugTable in the platform layer

33:00The program crashes

34:55We did not initialize the counter inside the timed_block constructor

35:06Testing the last changes. The platform layer writes now to a separate debug memory

35:31Hooking up the debug table from the game code after loading the game DLL

36:55The debug array could also live in the platform layer side, but that option would have its own problems

38:57The sharing of the debug_table could be better

40:10The platform counters still don't show up in the visualization

40:59We were not printing the platform layer records yet!

41:44Adding the RecordCount per translation unit to the debug table

46:02Figuring out the platform layer record count

47:42Testing again

48:37The Win32Loop closes after DEBUGFrameEnd is invoked, so its value is incorrect

50:25We want to have a way of establishing frame boundaries

51:20Introducing FRAME_MARKER

52:13New debug_event_type: DebugEvent_FrameMarker

54:14Testing it

55:10(Blackboard) Structure and plans for the debug log. We want to keep a history longer than one frame

57:02We need to allocate more memory. Maybe it should come from the platform layer

58:10Is the amount of data we want to keep in the static section going to be a problem?

59:33Instead of two ping-pong arrays, we have now sixty-four

1:00:30Now we can look across frames and we don't need the snapshots anymore

1:01:20Not as good as a circular buffer but it will do

1:02:43Q&A

🗩

1:02:43Q&A

🗩

1:02:43Q&A

🗩

1:03:11Hotspur_ Are you going to start the hardware renderer before starting on game logic? Or are you going to wait until software doesn't cut it? Or are you waiting for Vulkan?

🗪

1:03:11Hotspur_ Are you going to start the hardware renderer before starting on game logic? Or are you going to wait until software doesn't cut it? Or are you waiting for Vulkan?

🗪

1:03:11Hotspur_ Are you going to start the hardware renderer before starting on game logic? Or are you going to wait until software doesn't cut it? Or are you waiting for Vulkan?

🗪

1:04:09TheiBurley Do you just use the blue line selector and green cursor to make it easier to follow on stream, or is that how you normally like it? I feel like it would get fatiguing on the eyes

🗪

1:04:09TheiBurley Do you just use the blue line selector and green cursor to make it easier to follow on stream, or is that how you normally like it? I feel like it would get fatiguing on the eyes

🗪

1:04:09TheiBurley Do you just use the blue line selector and green cursor to make it easier to follow on stream, or is that how you normally like it? I feel like it would get fatiguing on the eyes

🗪

1:04:34elxenoaizd When do you think it is a good idea to use somebody else's library / system instead of implementing our own? (e.g. Do you use anything from the C standard library?)

🗪

1:04:34elxenoaizd When do you think it is a good idea to use somebody else's library / system instead of implementing our own? (e.g. Do you use anything from the C standard library?)

🗪

1:04:34elxenoaizd When do you think it is a good idea to use somebody else's library / system instead of implementing our own? (e.g. Do you use anything from the C standard library?)

🗪

1:07:08cubercaleb Missed the first half of the stream, are you saving the past 60 frames into a buffer?

🗪

1:07:08cubercaleb Missed the first half of the stream, are you saving the past 60 frames into a buffer?

🗪

1:07:08cubercaleb Missed the first half of the stream, are you saving the past 60 frames into a buffer?

🗪

1:07:40elxenoaizd If a miracle happens and C++ starts doing things right and addresses the issues in the implementations of most of their features, would you use their features like templates etc., or stick to metaprogramming etc.?

🗪

1:07:40elxenoaizd If a miracle happens and C++ starts doing things right and addresses the issues in the implementations of most of their features, would you use their features like templates etc., or stick to metaprogramming etc.?

🗪

1:07:40elxenoaizd If a miracle happens and C++ starts doing things right and addresses the issues in the implementations of most of their features, would you use their features like templates etc., or stick to metaprogramming etc.?

🗪

1:08:02JamesWidman In the debug display, are we going to see something like Brendan Gregg's flame graphs (where function call depth is represented on the Y axis)?

🗪

1:08:02JamesWidman In the debug display, are we going to see something like Brendan Gregg's flame graphs (where function call depth is represented on the Y axis)?

🗪

1:08:02JamesWidman In the debug display, are we going to see something like Brendan Gregg's flame graphs (where function call depth is represented on the Y axis)?

🗪

1:08:27insofaras I think a lot of people would like to see how to write a hardware renderer, myself included^α

🗪

1:08:27insofaras I think a lot of people would like to see how to write a hardware renderer, myself included^α

🗪

1:08:27insofaras I think a lot of people would like to see how to write a hardware renderer, myself included^α

🗪

1:10:33CaptainKraft Getting good at writing game engines: make lots of them or work on a few larger ones and continue improving them?

🗪

1:10:33CaptainKraft Getting good at writing game engines: make lots of them or work on a few larger ones and continue improving them?

🗪

1:10:33CaptainKraft Getting good at writing game engines: make lots of them or work on a few larger ones and continue improving them?

🗪

1:12:07Close it down

🗩

1:12:07Close it down

🗩

1:12:07Close it down

🗩

Keyboard Navigation

Global Keys

Menu toggling

In-Menu and Index Controls

Quotes and References Menus and Index

Quotes, References and Credits Menus

Filter Menu

Filter and Link Menus

Credits Menu