Run in Raspberry Pi 1

[seanshpark]

Build

cmake -DCMAKE_BUILD_TYPE=Release \
-DBUILD_QAPPLE=OFF -DBUILD_LIBRETRO=OFF \
../AppleWinLinux/

It's tooooo slow running in Raspberry Pi 1 (running in 900MHz)

• gets slower and slower and then doesn't respond

To find a way to run at least with some response.

As of now

sa2_load.sh

• with imgui
• load disk
• exit

  ./sa2 \
  --sdl-driver 1 \
  --geometry 640x400 \
  --fixed-speed \
  --aspect-ratio \
  --no-audio \
  --timer

sa2_run.sh

• run
• F5 to swap disk
• F3 to exit

  ./sa2 \
  --sdl-driver 1 \
  --geometry 640x400 \
  --fixed-speed \
  --aspect-ratio \
  --no-audio \
  --timer \
  --no-imgui

  with refresh rate 24Hz

[seanshpark]

1/ Set refresh rate to 20

• need to force return 20 and rebuild

2/ Current option that seems to run, with mouse movement in Imgui

./sa2 \
  --sdl-driver 1 \
  --geometry 640x480 \
  --no-audio \
  --fixed-speed

• audio playback is almost impossible. better with no-audio

[seanshpark]

Settings

• Speed
  • Speed is 10 (1 MHz)
  • Full speed will make worse
  • Actual is about 569,500Hz
  • increase Speed to won't do good, delay(?) gets worse

[seanshpark]

with --timer option

• speed Actual gives about 835,000
• this is better
• refresh rate is 20Hz

[seanshpark]

Refresh to default 60Hz

• speed Actual about 445,000
• Imgui mouse moves better

to 30Hz

• Actual about 623,000
• mouse moves with some lag

[seanshpark]

Run with --benchmark option with some changes

regs.pc: 366
Pure Video FPS: 20
Pure CPU MHz:   0.6 (video update)
Pure CPU MHz:   11.9 (full-speed)

EXPECTED AVERAGE VIDEO GAME
PERFORMANCE: 11 FPS

[seanshpark]

add_compile_options(-march=armv6+vfpv2 -mfloat-abi=hard)

-->

regs.pc: 314
Pure Video FPS: 19
Pure CPU MHz:   0.7 (video update)
Pure CPU MHz:   12.0 (full-speed)

EXPECTED AVERAGE VIDEO GAME
PERFORMANCE: 12 FPS

but not much difference

[seanshpark]

Benchmark with --no-imgui

regs.pc: 30a
Pure Video FPS: 36
Pure CPU MHz:   1.1 (video update)
Pure CPU MHz:   21.9 (full-speed)

EXPECTED AVERAGE VIDEO GAME
PERFORMANCE: 23 FPS

[seanshpark]

Use OpenGL

./sa2 \
    --sdl-driver 0 --geometry 640x400 \
    --fixed-speed --aspect-ratio --no-audio --timer --no-imgui \
    --benchmark

regs.pc: 30a
Pure Video FPS: 25
Pure CPU MHz:   1.2 (video update)
Pure CPU MHz:   21.9 (full-speed)

EXPECTED AVERAGE VIDEO GAME
PERFORMANCE: 18 FPS

Use OpenGLES2

./sa2 \
    --sdl-driver 1 --geometry 640x400 \
    --fixed-speed --aspect-ratio --no-audio --timer --no-imgui \
    --benchmark

regs.pc: 314
Pure Video FPS: 35
Pure CPU MHz:   1.2 (video update)
Pure CPU MHz:   21.6 (full-speed)

EXPECTED AVERAGE VIDEO GAME
PERFORMANCE: 23 FPS