GNU bug report logs - #32416
nice command doesn't provide requested niceness

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: andré <andr55 <at> laposte.net>
To: bug-coreutils <at> gnu.org
Subject: nice command doesn't provide requested niceness
Date: Fri, 10 Aug 2018 14:24:57 -0400

nice -n 1 (command)
.or.
nice --adjustment=1 (command)

produces niceness of 10
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

-- 
André

Message #8 received at 32416 <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: andré <andr55 <at> laposte.net>, 32416 <at> debbugs.gnu.org
Subject: Re: bug#32416: nice command doesn't provide requested niceness
Date: Sat, 11 Aug 2018 08:12:47 +0200

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?

Have a nice day,
Berny

Message #11 received at 32416 <at> debbugs.gnu.org (full text, mbox):

From: andré <andr55 <at> laposte.net>
To: Bernhard Voelker <mail <at> bernhard-voelker.de>, 32416 <at> debbugs.gnu.org
Subject: Re: bug#32416: nice command doesn't provide requested niceness
Date: Sun, 12 Aug 2018 01:12:15 -0400

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

Message #14 received at 32416 <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: andré <andr55 <at> laposte.net>, 32416 <at> debbugs.gnu.org
Subject: Re: bug#32416: nice command doesn't provide requested niceness
Date: Sun, 12 Aug 2018 15:51:09 +0200

tag 32416 notabug
close 32416
thanks

On 08/12/2018 07:12 AM, andré wrote:
> 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)

Maybe 'chromium-browser' adjusts this itself? (I don't have it here.)
You could check with strace.  After all, this is not a bug in 'nice',
therefore I'm marking it as such.  Of course, you can continue the
discussion here.

Have a nice day,
Berny

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