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"nice" question

  • 25-07-2008 12:18pm
    #1
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭


    process A, owned by root, nice value of 19.
    process B, owned by me, nice value of 0.

    Both compete for compute resources, who wins?


Comments

  • #2
    yoke
    Registered Users, Registered Users 2 Posts: 529 ✭✭✭yoke


    process B


  • #3
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭Khannie


    Welcome to boards.ie

    That's what I thought. Just wanted to make sure.


  • #4
    witnessmenow
    Registered Users, Registered Users 2 Posts: 7,264 ✭✭✭witnessmenow


    The nice value is how nice it is, the higher the value the more it lets other processes go ahead of it.

    Also remember you can go into minus figures if i'm not mistaken


  • #5
    Creamy Goodness
    Registered Users, Registered Users 2 Posts: 26,584 ✭✭✭✭Creamy Goodness


    yup the nice value will always superceed who owns the process.


  • #6
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭Khannie


    Cremo wrote: »
    yup the nice value will always superceed who owns the process.

    Yeah, this is the bit I wasn't 100% on. I thought that potentially the superusers process might get priority regardless of niceness. Good to know for sure. Cheers lads.


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  • #7
    Snowbat
    Registered Users, Registered Users 2 Posts: 1,065 ✭✭✭Snowbat


    IIRC, only root can use negative values. There are a few processes owned by root running at -5 on this machine.


  • #8
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭Khannie


    Snowbat wrote: »
    IIRC, only root can use negative values. There are a few processes owned by root running at -5 on this machine.

    Root can renice a process owned by another user to a negative value. The gnome-system-monitor tool lets you do this in a nice gui way.


  • #9
    Explosive_Cornflake
    Registered Users, Registered Users 2 Posts: 2,133 ✭✭✭Explosive_Cornflake


    Or htop will do it from the command line, in a friendly way :)


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