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Groups > linux.kernel > #1530202

Re: RFC: documentation of the autogroup feature [v2]

From Afzal Mohammed <afzal.mohd.ma@gmail.com>
Newsgroups linux.kernel
Subject Re: RFC: documentation of the autogroup feature [v2]
Date 2016-11-25 14:00 +0100
Message-ID <sHogG-FW-21@gated-at.bofh.it> (permalink)
References (2 earlier) <sGGfD-5CK-3@gated-at.bofh.it> <sGHOq-6Ev-33@gated-at.bofh.it> <sGIhs-71P-35@gated-at.bofh.it> <sGJnb-7Id-17@gated-at.bofh.it> <sHa41-8qT-7@gated-at.bofh.it>
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Hi,

On Thu, Nov 24, 2016 at 10:41:29PM +0100, Michael Kerrisk (man-pages) wrote:

>        Suppose  that  there  are two autogroups competing for the same
>        CPU.  The first group contains ten CPU-bound processes  from  a
>        kernel build started with make -j10.  The other contains a sin‐
>        gle CPU-bound process: a video player.   The  effect  of  auto‐
>        grouping  is  that the two groups will each receive half of the
>        CPU cycles.  That is, the video player will receive 50% of  the
>        CPU  cycles,  rather  just 9% of the cycles, which would likely
                            ^^^^
                            than ?

Regards
afzal

>        lead to degraded video playback.  Or to put things another way:
>        an  autogroup  that  contains  a large number of CPU-bound pro‐
>        cesses does not end up overwhelming the CPU at the  expense  of
>        the other jobs on the system.

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Thread

RFC: documentation of the autogroup feature "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-22 17:20 +0100
  [patch] sched/autogroup: Fix 64bit kernel nice adjustment Mike Galbraith <efault@gmx.de> - 2016-11-23 11:40 +0100
    Re: [patch] sched/autogroup: Fix 64bit kernel nice adjustment "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-23 14:50 +0100
      Re: [patch] sched/autogroup: Fix 64bit kernel nice adjustment Mike Galbraith <efault@gmx.de> - 2016-11-23 15:20 +0100
        Re: [patch] sched/autogroup: Fix 64bit kernel nice adjustment "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-23 15:30 +0100
          Re: [patch] sched/autogroup: Fix 64bit kernel nice adjustment Mike Galbraith <efault@gmx.de> - 2016-11-23 17:00 +0100
    [tip:sched/urgent] sched/autogroup: Fix 64-bit kernel nice level  adjustment tip-bot for Mike Galbraith <tipbot@zytor.com> - 2016-11-24 07:30 +0100
  Re: RFC: documentation of the autogroup feature Mike Galbraith <efault@gmx.de> - 2016-11-23 12:50 +0100
    Re: RFC: documentation of the autogroup feature "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-23 15:00 +0100
      Re: RFC: documentation of the autogroup feature Mike Galbraith <efault@gmx.de> - 2016-11-23 16:40 +0100
        Re: RFC: documentation of the autogroup feature "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-23 17:10 +0100
          Re: RFC: documentation of the autogroup feature Mike Galbraith <efault@gmx.de> - 2016-11-23 18:20 +0100
            Re: RFC: documentation of the autogroup feature "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-23 23:50 +0100
        Re: RFC: documentation of the autogroup feature "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-23 17:10 +0100
          Re: RFC: documentation of the autogroup feature Mike Galbraith <efault@gmx.de> - 2016-11-23 18:20 +0100
            RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-24 22:50 +0100
              Re: RFC: documentation of the autogroup feature [v2] Afzal Mohammed <afzal.mohd.ma@gmail.com> - 2016-11-25 14:00 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-25 14:10 +0100
              Re: RFC: documentation of the autogroup feature [v2] Mike Galbraith <efault@gmx.de> - 2016-11-25 14:30 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-25 16:30 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-25 16:50 +0100
                Re: RFC: documentation of the autogroup feature [v2] Mike Galbraith <efault@gmx.de> - 2016-11-25 17:00 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-25 17:20 +0100
                Re: RFC: documentation of the autogroup feature [v2] Peter Zijlstra <peterz@infradead.org> - 2016-11-25 17:20 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-25 17:40 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-25 22:00 +0100
                Re: RFC: documentation of the autogroup feature [v2] Peter Zijlstra <peterz@infradead.org> - 2016-11-25 22:50 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-29 08:50 +0100
                Re: RFC: documentation of the autogroup feature [v2] Peter Zijlstra <peterz@infradead.org> - 2016-11-29 12:50 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-29 14:50 +0100
                Re: RFC: documentation of the autogroup feature [v2] Peter Zijlstra <peterz@infradead.org> - 2016-11-25 17:10 +0100
                Re: RFC: documentation of the autogroup feature [v2] Peter Zijlstra <peterz@infradead.org> - 2016-11-25 17:20 +0100
                Re: RFC: documentation of the autogroup feature [v2] "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-25 17:40 +0100
                Re: RFC: documentation of the autogroup feature [v2] Peter Zijlstra <peterz@infradead.org> - 2016-11-25 23:50 +0100
        Re: RFC: documentation of the autogroup feature "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-27 22:20 +0100
          Re: RFC: documentation of the autogroup feature Mike Galbraith <efault@gmx.de> - 2016-11-28 02:50 +0100
            Re: RFC: documentation of the autogroup feature "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-11-29 10:20 +0100
              Re: RFC: documentation of the autogroup feature Mike Galbraith <efault@gmx.de> - 2016-11-29 14:50 +0100

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