CPU usage in WinUAE 115% in some AGA games

MheAd · 26 June 2004, 20:54

Hi!
While playing some of the AGA games like for instance Trolls, at some points, I see that the CPU usage rises over 100%, sometimes up to 115%. When this occurs, either the frame rate drops a bit and/or the skips/hick-ups in the sound can be heard. Can anyone tell me why this happens? My computer (Athlon 2000+, 256MB RAM, GForce 5900) should be fast enough.

26 June 2004, 23:40

Just a noob @ emulation myself.. but 256MB RAM sounds borderline to me (what Windows Version?) and how much memory are you "signing over" to WinUAE?. CPU Speed and GFXCard match mine, my gut feeling is, get another at least 256 MB RAM for your PC; you wont regret it.

But maybe the experts have some better suggestions for you..

andreas · 27 June 2004, 00:54

Heheh...well try firing up some old demos with old crunchers...here CPU usage goes beyond 400% sometimes. I bet these values should be taken with a grain of salt and not be taken too seriously.

Toni Wilen · 27 June 2004, 09:20

CPU% over 100% means FPS is under 50 (or 60 in NTSC)
25FPS = 200%, 10FPS = 500% etc..

It can't be more simple..

Try enabling JIT to lower CPU usage. (of course some AGA games don't like JIT..)

andreas · 27 June 2004, 13:26

Quote:

Originally Posted by Toni Wilen

CPU% over 100% means FPS is under 50 (or 60 in NTSC)
25FPS = 200%, 10FPS = 500% etc..

It can't be more simple..

But frankly, it doesn't make any sense to me.

Maybe better limit the CPU stuff to 100% and only decrease the FPS value in order not to confuse people?

Toni Wilen · 27 June 2004, 14:14

Quote:

Originally Posted by andreas

But frankly, it doesn't make any sense to me.

Maybe better limit the CPU stuff to 100% and only decrease the FPS value in order not to confuse people?

huh. I think it is very clear, CPU% > 100% = emulator wants more CPU power than is available.

Even old Amiga game F1GP did the same

(O-key during play)

TikTok · 27 June 2004, 16:24

I think there is a bit of confusion over the CPU usage. I believe WinUAE's value refers to the CPU usage of the emulated Amiga, *not* the usage of your PC's CPU (as the first poster appears to suggest).

Toni Wilen · 27 June 2004, 21:25

It is PC CPU usage.

andreas · 27 June 2004, 21:33

No one can know.

27 June 2004, 21:50

I thought it was the PC CPU usage but didn't reply not to sound like a bitch.

BippyM · 27 June 2004, 22:04

Why not have 50fps as 100% (Running at correct speed) then if it slows down then drop it.. so it's proportionate to speed

50% = 25fps (30fps ntsc) etc..

This is easier to understand!

Toni Wilen · 27 June 2004, 22:14

Because you can have 50fps even if WinUAE only uses 1% of your PC CPU, for example when nothing happens on screen but it can jump to near 100% when emulating heavy copper effects.

TikTok · 28 June 2004, 12:37

[quote]It is PC CPU usage.[\quote]
Oops, I stand corrected

derSammler · 28 June 2004, 17:11

Quote:

Originally Posted by Toni Wilen

huh. I think it is very clear, CPU% > 100% = emulator wants more CPU power than is available.

I agree.

If it shows e.g. 400% it means that your cpu must be four times faster to get 50 fps. I always understood it this way...

28 June 2004, 17:18

400% = Buy a 4x powerful CPU

30 June 2004, 20:55

Quote:

Originally Posted by WindowsKiller

I agree.

If it shows e.g. 400% it means that your cpu must be four times faster to get 50 fps. I always understood it this way...

Same here

Fackamato · 30 June 2004, 20:56

Quote:

Originally Posted by Unregistered

Same here

That was me

26 June 2004, 20:54	#1
MheAd Registered User Join Date: Jun 2003 Location: Stockholm Posts: 59	CPU usage in WinUAE 115% in some AGA games Hi! While playing some of the AGA games like for instance Trolls, at some points, I see that the CPU usage rises over 100%, sometimes up to 115%. When this occurs, either the frame rate drops a bit and/or the skips/hick-ups in the sound can be heard. Can anyone tell me why this happens? My computer (Athlon 2000+, 256MB RAM, GForce 5900) should be fast enough.

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26 June 2004, 23:40	#2
StephanK Posts: n/a	Just a noob @ emulation myself.. but 256MB RAM sounds borderline to me (what Windows Version?) and how much memory are you "signing over" to WinUAE?. CPU Speed and GFXCard match mine, my gut feeling is, get another at least 256 MB RAM for your PC; you wont regret it. But maybe the experts have some better suggestions for you..

27 June 2004, 00:54	#3
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	Heheh...well try firing up some old demos with old crunchers...here CPU usage goes beyond 400% sometimes. I bet these values should be taken with a grain of salt and not be taken too seriously.

27 June 2004, 09:20	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,506	CPU% over 100% means FPS is under 50 (or 60 in NTSC) 25FPS = 200%, 10FPS = 500% etc.. It can't be more simple.. Try enabling JIT to lower CPU usage. (of course some AGA games don't like JIT..)

27 June 2004, 16:24	#7
TikTok Registered User Join Date: Jul 2001 Location: Malayasia Age: 43 Posts: 657	I think there is a bit of confusion over the CPU usage. I believe WinUAE's value refers to the CPU usage of the emulated Amiga, not the usage of your PC's CPU (as the first poster appears to suggest).

27 June 2004, 21:25	#8
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,506	It is PC CPU usage.

27 June 2004, 21:33	#9
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	No one can know.

27 June 2004, 21:50	#10
oldpx Posts: n/a	I thought it was the PC CPU usage but didn't reply not to sound like a bitch.

27 June 2004, 22:04	#11
BippyM Global Moderator Join Date: Nov 2001 Location: Derby, UK Age: 48 Posts: 9,355	Why not have 50fps as 100% (Running at correct speed) then if it slows down then drop it.. so it's proportionate to speed 50% = 25fps (30fps ntsc) etc.. This is easier to understand!

27 June 2004, 22:14	#12
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,506	Because you can have 50fps even if WinUAE only uses 1% of your PC CPU, for example when nothing happens on screen but it can jump to near 100% when emulating heavy copper effects.

28 June 2004, 12:37	#13
TikTok Registered User Join Date: Jul 2001 Location: Malayasia Age: 43 Posts: 657	[quote]It is PC CPU usage.[\quote] Oops, I stand corrected

28 June 2004, 17:18	#15
oldpx Posts: n/a	400% = Buy a 4x powerful CPU

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