Hi Marcos,

> Texts (mainly Aurora editor), databases (DataPerfect),
> spreadsheets (SuperCalc).

Interesting, I know none of those :-)

> Pentiums, year 1995-2000, CPU speeds
> 133-333 MHz, memories 96-128 MB.

> BUFFERS=4

A bit more might be good.

> DEVICE=C:\FDOS\JEMM\JEMFBHLP.EXE

FB as in framebuffer? Does this really help you?

> SHELLHIGH=C:\RECURSOS\4DOS\4dos.com C:\RECURSOS\4DOS /P=C:\fdauto47.bat

Does it make a difference to use SHELL without HIGH
or to use FreeCOM, for memory and idleness purposes?

> loadhigh DISPLAY con=(EGA,,1)
> MODE con codepage prepare=((850) C:\RECURSOS\FONTTELA\sanse_38.cpi)
> loadhigh MODE con codepage select=850

A user of codepages :-) With a custom font?

> Shsurdrv  /D32M$Disco_Virtu

Nice ramdisk :-)

> DEVLOAD /H C:\FDOS\UIDE\UIDE.SYS /S25 /H /PM

If you use UIDE, did you try loading it earlier?
Not sure what the docs recommend about relative
loading time compared to EMM386, though...

> loadhigh C:\RECURSOS\4DOS\kstack.com

A command history? Or just more keyboard buffer?
The former is built-in with FreeCOM and for the
latter you could try a FDCONFIG option, see the
docs of the kernel (fdconfig.txt?)...

> loadhigh c:\FDOS\BIN\keyb.exe br,850

MKEYB could also be interesting - it is tiny
but only has a selection of built-in layouts.

> loadhigh c:\fdos\bin\FDAPM.COM APMDOS

FDAPM is small in RAM, so you can try if
it works more efficiently outside UMBs.

>> Does this also happen with a clean boot (no drivers loaded)?
> 
> Yes. The Aurora editor, for instance, usually reaches 98-99% idle
> time on desktops, but only 50% on the ThinkPad with nothing
> loaded except COMMAND.COM and FDAPM.

Quite interesting! Does the ThinkPad use any
fancy BIOS stuff such as extra energy saving
or USB-to-PS2 or similar BIOS based drivers?

> Another intriguing fact is that I've already seen -- albeit very
> rarely -- high numbers on the notebooks such as 90%, and low ones
> on the desktops such as 3%.

That is indeed unusual. It sometimes happens
when software has idle loops which are not
supported that well by FDAPM, e.g. SSH2DOS
or other networked software, but if you mean
very different idle ratio even with the same
software then it is of course unexpected :-)

How idle you get in part depends on which IRQ
sources are active on your system and in part
on what your BIOS does and whether you have
hardware energy saving such as CPU throttle.

> Could this be related to BIOS power management,
> such as HDD power down, system doze, standby,
> suspend, etc? Is the "FDAPM stats"
> calculation influenced by these?

It could be that standby / suspend confuses the
statistics, but HDD power down is mostly done
by your harddisk itself, the BIOS only sets a
timer inside the harddisk one time for that.

As said above, doze can have an effect if the
system already "takes away CPU time" in other
ways if the system is not busy. Then there is
less work to be done for FDAPM but that is ok.

Eric :-)


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