Re: Lenny overheating, preventing installation
Dne sobota 11 april 2009 ob 15:58:35 je Douglas A. Tutty napisal(a):
> On Sat, Apr 11, 2009 at 03:46:31PM +0200, Klistvud wrote:
> > Dne sobota 11 april 2009 ob 15:22:38 je Douglas A. Tutty napisal(a):
> > > On Sat, Apr 11, 2009 at 02:26:30PM +0200, Aleksa ??u??uli?? wrote:
> > I agree ... to a point. Namely, I've never managed to overheat the unit
> > by just _using_ the CPU. It exclusively happens:
> > 1) during a Debian Lenny installation
> > 2) during a certain type of system lock-up which forces both the CPU
> > frequency and its usage to go to 100%.
> > I'd compare (if I may) the situation with a car having, say, a range of 0
> > to 7000 RPM, of which only 2000 to 5000 is actually the "working range".
> > Now, forcing the car in a very low gear and running it at a constant 7000
> > RPM, how many minutes until the engine overheats? And, more importantly:
> > how _stupid_ should one be to actually try doing this at home? It's, in
> > my opinion, what's happening here: some runaway process or OS flaw simply
> > ramps up the CPU to a regime that wasn't intended to be used for a
> > prolonged time in the first place. In normal usage, leaving a CPU running
> > at 100% usage is a rare occurence (I'm not talking about CPU frequency
> > here, I'm talking about CPU usage - 100% meaning no idle cycles
> > whatsoever over several minutes or even hours!).
> What about a big compile? Retouching a movie?
> For normal usage (other than using iceweasel), I have difficulty getting
> my dual PII-450 to less than 90% idle, but there are things that will
> bog it down, and no it doesn't overheat. Then again, its a 2U server,
> not a laptop.
A good case in point.
And firefox/iceweasel is _definitely_ a CPU hog.