Re: nice really nice?

[Randall R Schulz <rrschulz at cris dot com>]

Thomas,

One thing to keep in mind is that while Unix (and work-alikes) has a -20 
(best scheduling priority) ... +20 (worst priority) range, Windows has only 
the six distinct levels. I don't know how Cygwin maps the Unix nice values 
to the Windows priorities, offhand. Probably it's a linear mapping.

I haven't had a chance to read the information about scheduling in Windows, 
but I will. Thanks for referring me to it.

Randy


At 10:14 2002-11-25, you wrote:

> I'm also wondering what nice really does in cygwin. Look at the
> following test:
>
> $ time mkisofs -J -R -l * 2>/dev/null | nice -19 dd of=/dev/null
> real    0m7.482s
>
> $ time mkisofs -J -R -l * 2>/dev/null | nice -1 dd of=/dev/null
> real    0m7.384s
>
> $ time mkisofs -J -R -l * 2>/dev/null | nice -0 dd of=/dev/null
> real    0m7.419s
>
> $ time mkisofs -J -R -l * 2>/dev/null | nice --1 dd of=/dev/null
> real    1m51.516s
>
> $ time mkisofs -J -R -l * 2>/dev/null | nice --19 dd of=/dev/null
> real    1m51.760s

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