Re: [PATCH][RFC] P4/Xeon Thermal LVT support

Zwane Mwaikambo
2002-03-27T11:47:50Z

On Wed, 27 Mar 2002, Dave Jones wrote:

> On Wed, Mar 27, 2002 at 08:04:37AM +0200, Zwane Mwaikambo wrote:
>
> > + rdmsr(MSR_IA32_THERM_STATUS, l, h);
> > + if (l & 1) {
> > + printk(KERN_EMERG "CPU#%d: Temperature above threshold\n", cpu);
> > + printk(KERN_EMERG "CPU#%d: Running in modulated clock mode\n", cpu);
> > + } else {
> > + printk(KERN_INFO "CPU#%d: Temperature/speed normal\n", cpu);
> > + }
>
> This chunk probably wants to be rate-limited to avoid flooding the
> same message over and over.

That shouldn't be a problem since the interrupt only occurs on thermal
transition, ie when you hit over the threshold or hit below. Therefore we
shouldn't be fluctuating since the clock modulation will be in effect and
the temperature will drop. However i can't be 100% certain.

Zwane

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