Why QEMU the slowest emulator in the world?
Moderators: Cat_7, Ronald P. Regensburg
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- Space Cadet
- Posts: 9
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Why QEMU the slowest emulator in the world?
I installed Mac OS 9.0.4 but QEMU is very slow at everything. What can I do to stop that slowness?
Re: Why QEMU the slowest emulator in the world?
You know them all?Why QEMU the slowest emulator in the world?
There is not much you can do. Qemu aims to be accurate, and so you can run almost every program that fits within its limitations.
The ppc emulation cannot make use of the acceleration available when the host uses the same architecture as the guest.
Best,
Cat_7
Re: Why QEMU the slowest emulator in the world?
I've been using the qemu-hardfloat-screamer version and the sound works intermittently, very strange because it worked very well before (now it asks for microphone allowance in privacy).
Re: Why QEMU the slowest emulator in the world?
Has something changed on your host? What does intermittent mean in this case? You have drop-outs, slowness, or does sound sometimes not work at all?
Best,
Cat_7
Best,
Cat_7
- adespoton
- Forum All-Star
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Re: Why QEMU the slowest emulator in the world?
Probably also worth asking what changed in your setup? Sounds like you're on macOS; are you on macOS 11 beta by any chance?
Re: Why QEMU the slowest emulator in the world?
Lowered the RAM to 768 and now it works perfectly again. Apparently, when you set the RAM to 1GB and virtual memory gets disabled because of it, the sound stops working almost completely (just one or two beeps of a sound and then nothing).
Re: Why QEMU the slowest emulator in the world?
Yes,
The sound-enabled builds can only run with less than 1024Mb. After all, they are experimental
Best,
Cat_7
The sound-enabled builds can only run with less than 1024Mb. After all, they are experimental
Best,
Cat_7
Re: Why QEMU the slowest emulator in the world?
So far, I found some programs that can be run in SheepShaver, but does not run in qemu-system-ppc-screamer.Cat_7 wrote: ↑Mon Oct 05, 2020 7:37 amYou know them all?Why QEMU the slowest emulator in the world?
There is not much you can do. Qemu aims to be accurate, and so you can run almost every program that fits within its limitations.
The ppc emulation cannot make use of the acceleration available when the host uses the same architecture as the guest.
Best,
Cat_7
Colibricks
https://macintoshgarden.org/games/colibricks-13
PacMan Deluxe
https://macintoshgarden.org/games/pacmac-deluxe
Sixtyforce 0.8.0
https://macintoshgarden.org/apps/sixtyforce
Rosetta Stone
https://macintoshgarden.org/apps/rosetta-stone-chinese
- adespoton
- Forum All-Star
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- Joined: Fri Nov 27, 2009 5:11 am
- Location: Emaculation.com
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Re: Why QEMU the slowest emulator in the world?
When you say "does not run", what is the error you get? Which QEMU options are you using? Which OS version are you running? In all likelihood, the software will not run on real hardware with the configuration you currently have set -- although if you're using the fastfpu build of Screamer, it could also be an FPU issue.phed wrote: ↑Fri Dec 25, 2020 3:59 amSo far, I found some programs that can be run in SheepShaver, but does not run in qemu-system-ppc-screamer.Cat_7 wrote: ↑Mon Oct 05, 2020 7:37 amYou know them all?Why QEMU the slowest emulator in the world?
There is not much you can do. Qemu aims to be accurate, and so you can run almost every program that fits within its limitations.
The ppc emulation cannot make use of the acceleration available when the host uses the same architecture as the guest.
Best,
Cat_7
Colibricks
https://macintoshgarden.org/games/colibricks-13
PacMan Deluxe
https://macintoshgarden.org/games/pacmac-deluxe
Sixtyforce 0.8.0
https://macintoshgarden.org/apps/sixtyforce
Rosetta Stone
https://macintoshgarden.org/apps/rosetta-stone-chinese
Re: Why QEMU the slowest emulator in the world?
Colibricks works, you just need to disable the screen enhancement setting.
Pacman and perhaps also Rosetta stone suffer from not be able to load the gamma tables for the monitor.
Sixtyforce (i tested 0.6 earlier) works, but runs a 1-2 frames a second....
Best,
Cat_7
Pacman and perhaps also Rosetta stone suffer from not be able to load the gamma tables for the monitor.
Sixtyforce (i tested 0.6 earlier) works, but runs a 1-2 frames a second....
Best,
Cat_7
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- Space Cadet
- Posts: 2
- Joined: Mon Jan 25, 2021 1:16 am
Re: Why QEMU the slowest emulator in the world?
can iyou build qemu to make it as fast as exagear
Re: Why QEMU the slowest emulator in the world?
Hi,
Sorry, there is not much we can do. We only build the software from the source that is maintained and developed by others.
Best,
Cat_7
Sorry, there is not much we can do. We only build the software from the source that is maintained and developed by others.
Best,
Cat_7