Fast Execution about fceux

[bbbradsmith]

I don't know how you're automating things, but if using lua there is emu.speedmode("turbo") in the interface, at least. If you're modifying the source directly you might look into how the turbo mode is implemented? (By default activated with the Tab key, I think.)

[Kautenja]

Indeed, I'm using a lua script that sets up the interface for the automated agent. I've been using emu.speedmode("maximum") which seems to net better performance than emu.speedmode("turbo") (around 120fps vs 45fps, with no frameskipping). My initial thought was to increase the maximum bound of the maximum speed mode from 3200% to 128000% in the source, but that seemed to have no additional effect. Perhaps overclocking the PPU would speed things up? But, I am unsure of how to accomplish this when launching fceux from a Unix shell.

[bbbradsmith]

I think there should be a configuration file that applies all the settings, so it shouldn't matter if you can't interact with the GUI after launching? (Is it still "fceux.cfg" on the SDL version?)

I don't know much about overclocking the PPU, but the Old PPU is significantly faster code vs. New PPU, at the expense of lower accuracy. Old PPU is still the default setting, I think, but just in case you might see if it's set.

[Kautenja]

ah, i do see a fceux.cfg in the .fceux directory with all the options listed. Looks like the old PPU is still in effect. Are there any other options I should check to boost emulation speed in this config file?

[zeromus]

overclocking the PPU does the opposite of what you want. If the maximum speed mode was 3200% and you were only getting 120fps, then changing it to 1 zillion % isn't going to help any; it's clearly not the limit.
set SDL.Vsync to 0. Or even better, hack BlitScreen in sdl-video.cpp to return immediately