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Subject: Re: Power consumption HZ100, HZ250, HZ1000: new numbers
From: Lee Revell <rlrevell@joe-job.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: James Bruce <bruce@andrew.cmu.edu>, Marc Ballarin <Ballarin.Marc@gmx.de>,
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Date: Sun, 31 Jul 2005 19:53:55 -0400
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On Mon, 2005-08-01 at 01:29 +0200, Pavel Machek wrote:
> Hi!
> 
> > > I'm pretty sure at least one distro will go with HZ<300 real soon now
> > > ;-).
> > > 
> > 
> > Any idea what their official recommendation for people running apps that
> > require the 1ms sleep resolution is?  Something along the lines of "Get
> > bent"?
> 
> So you busy wait for 1msec, big deal.

Which requires changing all those apps.  I thought we tried not to break
userspace with minor kernel version upgrades.

> Some machines can't even keep time properly with HZ=1000.

If your workaround for broken hardware involves screwing over people
with good hardware, it might be the wrong workaround.

>  Official recommendation is likely "help us
> with CONFIG_NO_IDLE_HZ" or "get over it".

IOW, "if you don't like it, get another distro, or compile your own
kernel".

Lee