Re: [TEST/REVIEW] CPU accounting patches

From: John-Mark Gurney <gurney_j_at_resnet.uoregon.edu>
Date: Fri, 27 Jan 2006 01:11:54 -0800
Brian Candler wrote this message on Fri, Jan 27, 2006 at 08:56 +0000:
> I think what you're saying is: I'm at no risk of my CPU becoming maxed out
> when speed has been automatically reduced by a power-saving daemon, because
> it will only stay there if there is still some spare capacity (i.e. some
> time is regularly spent in the HLT state). If not, the daemon will keep
> cranking up the clock speed until there *is* some spare capacity, or until
> max clock speed is reached.
> 
> I guess this is OK, *if* you trust the power management system to do its job
> properly. Unfortunately I have very bad experiences of such things. In many
> cases I've ended up turning off power management completely and locking
> everything at max clock speed. Mind you, if I do that, anything you do with
> scaling factors isn't going to affect me, so actually I don't really care.
> I'll shut up now :-)

powerd(8):
http://www.freebsd.org/cgi/man.cgi?query=powerd&apropos=0&sektion=0&manpath=FreeBSD+6.0-RELEASE+and+Ports&format=html
DESCRIPTION
     The powerd utility monitors the system state and sets various power con-
     trol options accordingly.	It offers three modes (maximum, minimum, and
     adaptive) that can be individually selected while on AC power or batter-
     ies.

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."
Received on Fri Jan 27 2006 - 08:13:08 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:51 UTC