FPS at half speed when Multithread is enable

[ppmeis]

Today I detect while playing Virtua Tennis: World Tour, if multithread option is enable game goes at exactly half speed when the match is ready:

Multithread disable:

Multithread enable:

[unknownbrackets]

What FPS does it play at when on a real PSP?

-[Unknown]

[hrydgard]

Virtua Tennis is a pretty consistent 60 FPS on a real PSP.

[ppmeis]

Tested with latest build. Same issue.

[ppmeis]

Tested with latest build. Same status.

[ppmeis]

Tested with latest build. Same status:

[ppmeis]

Tested with latest build. Same status.

[ppmeis]

Tested with latest build. Same status.

[ppmeis]

Tested with latest build. Same status.

[ppmeis]

Tested latest buil. Same issue.

[hrydgard]

This won't be fixed, instead the existing multithread mode will go away after 1.2.0, and will be replaced with a different one later.

[ppmeis]

@hrydgard nice to know that. Should I close this issue then? estimated release date for 1.2.0?

[ppmeis]

Tested with latest build. It seems new Multithread mode is not implemented yet. @unknownbrackets

[unknownbrackets]

It's gonna take some commits and pull requests to implement. The plan is basically to process GPU instructions but queue them, and then process them on a separate thread (or threads maybe even, in Vulkan.)

We'll still need barriers for some things, and there can still be glitches from memory getting modified, so it'll be tricky. But at least we can have the timing predictable.

-[Unknown]

[ppmeis]

Tested with latest build. It seems when I load the game with Multithread enable it works fine:

But if you go to PPSSPP menu and then back to the game without touching any option, FPS drops again:

[zminhquanz]

Project Diva Extend when enable Multithread is still half FPS , not boost performance , off multithread is normal