> On 24 Aug, 2016, at 11:22, Simo Koivukoski <[email protected]> wrote:
> 
> Is there any CPU load meter for OS 7 - 8.1? If find a "peek-a-boo-12.hqx" but 
> it is not very accurate. Usually it shows always 100% for selected task.

It’s tricky, because Classic MacOS is a *cooperatively* multitasking OS, and 
continually offers idle CPU time to applications in case they want to do 
something with it.  It’s a very different model than a modern pre-emptive 
system.

That said, BasiliskII is able to avoid using 100% of the host CPU when the 
emulated Mac isn’t doing anything.  I’m not sure precisely how it detects an 
idle condition, though.  The 68K instruction set does include a STOP 
instruction, but I have no idea whether the Mac uses it as standard.

 - Jonathan Morton

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