On 22/06/2015 18:50, Rugxulo wrote:
> Really naive suggestion:  did you try IDLEHALT (in FDCONFIG.SYS)?    :-)

Yes, I did, although my understanding is that IDLEHALT is a HLT 
implementation inside the kernel, so it's probably (?) redundant with 
what FDAPM achieves, when the latter is loaded.

Without IDLEHALT, FDAPM reports ~50% of idle time.

With IDLHALT=1, the result is seemingly worse, because FDAPM reports 
only ~40% of idle time (but this migh be a wrong perception of FDAPM, 
since it sees the kernel giving away less time exactly because of 
kernel-issued HLTs...)

I'd be curious to know if I am alone with this problem - do you have 
'good' idle results on your PC when the system only blinks at a command 
prompt?

The test is as simple as this:

FDAPM APMDOS
FDAPM ZAPSTATS
(here wait for 30s or so)
FDAPM STATS


I never really payed attention to this, and assumed that's just how 
things are, but when testing DOSMid I was surprized to see that DOSMid 
achieves 95% and more of idle time when playing MIDI files, while 
FreeCOM is apparently doing something 50% of the time, when it should do 
literally nothing. So now it's cheaper (power-wise) for me to play MIDI 
files all day long on my PC rather than leave it "idle" at the DOS prompt :)

Mateusz


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