[Bug 911206] Re: /etc/init.d/ondemand unconditionally overrules /etc/init.d/cpufrequtils

[Sergio Callegari]

There is another issue:

/etc/init.d/ondemand tries to set the governor to ondemand
unconditionally, even on intel systems with p-state.

Systems with the p-state frequency scaling do not have an ondemand
governor at all. This means that the /etc/init.d/ondemand falls back to
the powersave governor, hindering performance.

Alltogether, the /etc/init.d/ondemand looks hackish.  Its operation
relies on assumptions on the system setup that are just plain wrong:

1) That one does not install the cpufreq utils
since, as mentioned in the original bug report, it destroys the work of /etc/init.d/cpufrequtils

2) That one is on the acpi cpu frequency driver
since it is hardwired with the governors provided by such driver.

I strongly recommend getting rid of /etc/init.d/ondemand

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https://bugs.launchpad.net/bugs/911206

Title:
  /etc/init.d/ondemand unconditionally overrules
  /etc/init.d/cpufrequtils

Status in cpufrequtils package in Ubuntu:
  Confirmed
Status in sysvinit package in Ubuntu:
  Triaged

Bug description:
  /etc/init.d/ondemand *always* sets the cpu scaling governor to
  ondemand, and is executed after /etc/init.d/cpufrequtils.

  This causes two problems:
  1. Confusion, because it seems as if /etc/init.d/cpufrequtils is being run, but has no effect
  2. Possible problems down the road, because /etc/init.d/ondemand has no /etc/default/ondemand, so either editing or deleting
    /etc/init.d/ondemand. I just discovered that updating initscripts will fail if /etc/init.d/ondemand has been deleted (dpkg complains about this file missing and aborts)

  Suggested fixes:

  a) Remove /etc/init.d/ondemand, make the ondemand governor the default
  for /etc/init.d/cpufrequtils, install package cpufrequtils by default.

  b) If this is not desired, make absolutely sure that
  /etc/init.d/ondemand is executed *before* /etc/init.d/cpufrequtils,
  maybe by making /etc/init.d/cpufrequtils depend on
  /etc/init.d/ondemand.

  I'm looking forward to your responses,
  Daniel

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: initscripts 2.88dsf-13.10ubuntu4.1
  ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
  Uname: Linux 3.0.0-14-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Tue Jan  3 13:13:59 2012
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: sysvinit
  UpgradeStatus: Upgraded to oneiric on 2011-12-10 (23 days ago)
  modified.conffile..etc.init.d.ondemand: [modified]
  mtime.conffile..etc.init.d.ondemand: 2012-01-03T13:13:33.783902

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