[Bug 750009] Re: beam.smp use 10%CPU on idle netbook

[Marc H.]

I see the same behavior on Ubuntu 16.04.2 LTS:

http://i.imgur.com/pJ3eOK9.png

What is this? Permanent 2 x 3% idle on a Xeon 4core is a lot, what is
causing this?

Is this a joke? Not fixed after 6 years?

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https://bugs.launchpad.net/bugs/750009

Title:
  beam.smp use 10%CPU on idle netbook

Status in erlang package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: erlang

  Even if my netbook is completely idle beam.smp use about 4-10% CPU.

  If i understand correctly beam.smp is an SMP version of this program,
  the problem is, my netbook i a single core athom processor with
  hyperthreading enabled. There is no way to disable hypertheread in
  BIOS, and disabling it in kernel will consume more power too.

  lex       5498  5.1  1.2  88368 24844 ?        Sl   09:02   0:57
  /usr/lib/erlang/erts-5.7.4/bin/beam.smp -Bd -K true -A 4 -- -root
  /usr/lib/erlang -progname erl -- -home /home/lex -- -noshell -noinput
  -sasl errlog_type error -couch_ini /etc/couchdb/default.ini /etc/xdg
  /desktop-couch/compulsory-auth.ini /home/lex/.config/desktop-couch
  /desktop-couchdb.ini -s couch -pidfile /home/lex/.cache/desktop-couch
  /desktop-couchdb.pid -heart

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: erlang-base 1:13.b.3-dfsg-2ubuntu3
  Uname: Linux 2.6.38-rc8-00275-gf0c8602 i686
  Architecture: i386
  Date: Mon Apr  4 09:15:01 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  ProcEnviron:
   LANGUAGE=de_DE:de:en_GB:en
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: erlang
  UpgradeStatus: Upgraded to natty on 2011-01-04 (89 days ago)

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