Messages in this thread | | | Subject | Re: BIOS THRM-Throttling and driver timings | From | Arjan van de Ven <> | Date | Sun, 08 Oct 2006 23:45:06 +0200 |
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On Sun, 2006-10-08 at 23:18 +0200, Pavel Machek wrote: > Hi! > > > > We have a motherboard that has Thermal Throttling in the BIOS (which > > > we cannot disable). This causes the CPU usage to go up and down when > > > the CPU temperature reaches (and stays around) the Throttling > > > temperature point. > > > > > > What we would like to know is whether this will affect the timings in > > > drivers, eg the wireless drivers we are using. What can we check in > > > drivers' code that will tell us that its operations may be affected > > > the throttling? > > > > > > In the past few days, we noticed that some of the linux units we > > > deployed freezes after deveral hours of operation, we are now trying > > > to reproduce the problem in our test environment. Some insight on the > > > affect of throttling will help us narrow down the search. > > > in general linux should be ok with this happening. However for specific > > cases... you'll need to provide more information; you're not > > mentioning > > Really? AFAICT P4 will happily slow down behind our backs, making at > least udelays() with interrupts disabled sleep for too long.
it will during thermal throttle yes. but udelay() and co as API never have been super accurate; they mostly promise at least this much delay
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