Otimização gráfica com o Intel GPA

1. Danilo Cominotti Marques
Arquiteto de Sistemas (Dextra/Mutant) e Intel Software Innovator

2. #IntelGameDev 2
Scaling Graphics Performance Effectively
My super
awesome
game
30 FPS

3. #IntelGameDev 3
Scaling Graphics Performance Effectively
My super
awesome
game
30 FPS
10 FPS

4. #IntelGameDev 4
Scaling Graphics Performance Effectively
My super
awesome
game
30 FPS
10 FPS 20 FPS

5. #IntelGameDev 5
Scaling Graphics Performance Effectively
My super
awesome
game
30 FPS
10 FPS 20 FPS
30 FPS

6. #IntelGameDev 6
Scaling Graphics Performance Effectively
My super
awesome
game
30 FPS
10 FPS 30 FPS+
60 FPS+
Intel® Graphics
Performance
Analyzers

7. #IntelGameDev 7
Intel® Graphics Performance Analyzers (Intel GPA)
Intel® GPA is a suite of graphics performance tools created by Intel for the
purpose of optimizing games and real-time graphics applications.
System Analyzer
Multi-Frame Analyzer
Trace Analyzer

8. #IntelGameDev
GPU bound
8
Profiling Workflow
Frame Analysis
Identify Scene
+ +
CPU vs GPU
bound?
Identify Hotspots
Identify Hotspots via instrumentation
CPU bound

9. #IntelGameDev
GPU bound
9
Profiling Workflow
Frame Analysis
Identify Scene
+ +
CPU vs GPU
bound?
Identify Hotspots
Identify Hotspots via instrumentation
CPU bound

10. #IntelGameDev
GPU bound
10
Profiling Workflow
Frame Analysis
Identify Scene
+ +
CPU vs GPU
bound?
Identify Hotspots
Identify Hotspots via instrumentation
CPU bound

11. #IntelGameDev 11
System Analyzer Overview

12. #IntelGameDev 12
In Application Live Analysis

13. #IntelGameDev
GPU bound
13
Profiling Workflow
Frame Analysis
Identify Scene
+ +
CPU vs GPU
bound?
Identify Hotspots
Identify Hotspots via instrumentation
CPU bound

14. #IntelGameDev 14
• New Trace Analyzer UI with
improved collection mechanism
• Collect data from various
sources correlated in one
timeline
• ETW events
• Graphics API calls
• ITT user markers
• Sampled metrics
Trace Analyzer Overview

15. #IntelGameDev 15
GPU bound vs CPU bound comparison
• Consistent stream of
commands in GPU queue?
• GPU Bound
• Gaps in GPU queue?
• Not VSync bound?
• CPU bound
Not GPU Bound
GPU Bound

16. #IntelGameDev
GPU bound
16
Profiling Workflow
Frame Analysis
Identify Scene
+ +
CPU vs GPU
bound?
Identify Hotspots
Identify Hotspots via instrumentation
CPU bound

17. #IntelGameDev
GPU bound
17
CPU Bound
Frame Analysis
Identify Scene
+ +
CPU vs GPU
bound?
Identify Hotspots
Identify Hotspots via instrumentation
CPU bound

18. #IntelGameDev 18
Game Instrumentation
Instrumentation Alternatives
• ITT
• ETW
• PIX/Graphics API markers
Hotspots from selected region
Dive into region occurrences

19. #IntelGameDev
GPU bound
20
GPU Bound
Frame Analysis
Identify Scene
+ +
CPU vs GPU
bound?
Identify Hotspots
Identify Hotspots via instrumentation
CPU bound

20. #IntelGameDev 21
Frame Analyzer Overview

21. #IntelGameDev 22
Multi-frame Capture and Playback
New in Intel® GPA 2019 R1 Release
• Difficult problems for
single frame analysis
• Debug intermittent
glitches and frame
hitches
• Profile multi-frame
algorithms
• Single frame capture
workflow still
available

22. #IntelGameDev
GPU bound
23
GPU Bound
• Frame Analysis to identify most expensive calls
• Easy hotspot analysis for automatic bottleneck root cause analyzer
Identify HotspotsFrame Analysis

23. #IntelGameDev 24
Find most expensive calls
Bottom up approach

24. #IntelGameDev 25
Find most expensive calls
Top down approach

25. #IntelGameDev 26
Hotspot Analysis Overview