Nice value and thread priority

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vinaynk Contact options for registered users 's Avatar (by Gravatar) posted on
July 18, 2005, 7:03 am
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Hello

I am trying to understand the scheduling in Linux.

Quoted text here. Click to load it

http://groups-beta.google.com/group/linux.kernel/browse_frm/thread/c2ee40c43147e79d/0f37be2d50e4dd6c?q=scheduling&rnum=2#0f37be2d50e4dd6c


Here it mentions that for the threads with policy SCHED_OTHER have soft
priority  over the 'nice' range of -20 to +19 (static priority of
100-139)
But when I see the process details with "top -b- n 1" command the
priorities
of the tasks shown are all in 10  to 30 value range and the nice
valuesare -20 to 19

Can anybody please explain me the relationship between the nice value
and the
priority needed for thread scheduling in real time.

Thanx
Vinay


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vinaynk Contact options for registered users 's Avatar (by Gravatar) posted on
July 18, 2005, 8:01 am
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Re: Nice value and thread priority
Hello

I am trying to understand the scheduling in Linux.

Quoted text here. Click to load it

http://groups-beta.google.com/group/linux.kernel/browse_frm/thread/c2ee40c43147e79d/0f37be2d50e4dd6c?q=scheduling&rnum=2#0f37be2d50e4dd6c


Here it mentions that for the threads with policy SCHED_OTHER have soft
priority  over the 'nice' range of -20 to +19 (static priority of
100-139)
But when I see the process details with "top -b- n 1" command the
priorities
of the tasks shown are all in 10  to 30 value range and the nice
valuesare -20 to 19

Can anybody please explain me the relationship between the nice value
and the
priority needed for thread scheduling in real time.

Thanx
Vinay


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Vinay N Karanth Contact options for registered users 's Avatar (by Gravatar) posted on
July 18, 2005, 10:38 am
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Re: Nice value and thread priority

Hello


I am trying to understand the scheduling in Linux.



Quoted text here. Click to load it


http://groups-beta.google.com/ group/linux.kernel/browse_frm/ thread/c2...

Here it mentions that for the threads with policy SCHED_OTHER have soft
priority  over the 'nice' range of -20 to +19 (static priority of
100-139)
But when I see the process details with "top -b- n 1" command the
priorities
of the tasks shown are all in 10  to 30 value range and the nice
valuesare -20 to 19


Can anybody please explain me the relationship between the nice value
and the
priority needed for thread scheduling in real time.


Thanx
Vinay



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