Full screen + Vsync + texture scaling = performance loss

[RPG Advocate]

If I play a game in full screen with Vsync and 5x BRZ texture scaling, VPS drops to around 30-40. Disabling any one of those three things returns the VPS to 60. It doesn't appear to be a resource problem, because when I use those settings, I get about 35% CPU utilization, and I have over 10GB of RAM free.

My system:

i5-3570K @ 4.2 GHz
16GB RAM
NVidia 660 Ti 2GB

Those specs should be more than enough to handle PPSSPP at max settings.

[solarmystic]

(06-18-2013 01:31 AM)RPG Advocate Wrote:  If I play a game in full screen with Vsync and 5x BRZ texture scaling, VPS drops to around 30-40.

Which game? Any game in particular?

Also 35% CPU utlization for a super charged IB i5 quad is disturbingly high for if it's just PPSSPP you were running at the time on your machine.

Don't leave us hanging mate.

[Bad Company]

If you play with Vsync and 5x BRZ texture scaling, but without full screen the vps drops or not?

I am with the same problem when I switch to full screen the vps drops to 30, but when I turn back to window the vps go to 60.

With VSync OFF on full screen and/or with Vsync ON on window, it doesn't happens.

[KrossX]

Try enabling triple buffering from your video card settings.

[[Unknown]]

How much video memory are you using when you do that, according to like GPU-Z or whatever?

Vsync affecting it definitely does sound like a driver related thing.

-[Unknown]

[Squall Leonhart]

its normal vsync behavior when the framerate cannot sustain full speed

[[Unknown]]

Oh, duh. That makes sense.

-[Unknown]

[Henrik]

We need to make the resolution system a bit more flexible so you can run at non-full resolution while still scaling to full screen. This should let your GPU keep up - it's obvious that it's falling _just_ a little behind.

[xemnas]

I don't have this issue. Vsync on, full screen, and 5x texture scaling. I'm using a 7870.

[Ritori]

(06-18-2013 12:08 PM)xemnas Wrote:  I don't have this issue. Vsync on, full screen, and 5x texture scaling. I'm using a 7870.

maybe u device (pc) is strong enough to handle it?

[vitality19]

(06-18-2013 11:35 AM)Henrik Wrote:  We need to make the resolution system a bit more flexible so you can run at non-full resolution while still scaling to full screen. This should let your GPU keep up - it's obvious that it's falling _just_ a little behind.

Yes, this would be great for weaker gpus. Is this hard to implement on Android, I mean to set PPSSPP to run in original PSP resolution (480*272) or is it already implemented by enabling buffered rendering (the image gets blurry, but some games run slower, though some faster) ?

[xemnas]

In some scene, I get a slowdown when VSync is on. Don't know why. My GPU should be capable.

[RPG Advocate]

Here's a screenshot of CPU, GPU and RAM usage when the slowdown occurs.



One other interesting thing is that the reported FPS doesn't decrease, only the VPS.

[Squall Leonhart]

create a profile for ppsspp with the power management mode set to prefer max performance

[RPG Advocate]

(06-19-2013 02:46 AM)Squall Leonhart Wrote:  create a profile for ppsspp with the power management mode set to prefer max performance

This completely eliminates the slowdown. Thanks!