bug#32416: nice command doesn't provide requested niceness

[andré]

Le 2018-08-11 à 02:12, Bernhard Voelker a écrit :
> On 08/10/2018 08:24 PM, andré wrote:
> > nice -n 1 (command)
> > .or.
> > nice --adjustment=1 (command)
> >
> > produces niceness of 10
>
> how do you check this?
>
> > on a system with default niceness of 0
> > coreutils version 8.25
> > package coreutils-8.25-3.mga6.src.rpm compiled 2017-05-02 by Mageia
> >
> > expected behavior :
> > produce niceness of 1
>
> I cannot reproduce here ('nice' wasn't changed to this regard since 8.25):
>
>    $ nice --version | head -n1
>    nice (GNU coreutils) 8.30
>    $ nice
>    0
>    $ nice -n 1 nice
>    1
>
> 'nice' only adds 10 if I don't specify a number:
>
>    $ nice nice
>    10
>
> Could you please show us a reproducer?

when I do :

nice -n 1 chromium-browser

mate-system-monitor under processes shows
priority (niceness) of 10 for each chromium-browser process.
(there is one process by page)

If in mate-system-monitor I change priority (niceness) to 1, it is 
changed to 1.

Just tested with gkrellm
nice -n 1 gkrellm
produces niceness of 1 (as shown by mate-system-monitor)

so the problem affects chromium-browser if invoked with nice, but not 
all other applications (and maybe only chromium-browser)

I tried
nice '-n 1' chromium-browser
it still gives niceness of 10

Maybe because each page has a separate process, and '-n 1' is lost ?
(every chromium process started has a niceness of 10)

> Have a nice day,
> Berny

regards,
--
André