Messages in this thread | | | Subject | Re: exposing FSB clock speed in /sys | From | Arjan van de Ven <> | Date | Fri, 30 Mar 2007 08:49:52 -0700 |
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On Fri, 2007-03-30 at 07:39 -0800, Stephane Eranian wrote: > Hello, > > It seems that the kernel does not expose the Front-Side Bus (FSN) Clock > speed to user applications
and that is a good thing ;)
> Knowledge the the FSB speed is very useful to monitoring tools. It is used > to compute certain bus-related metrics.
perhaps. > > Looking at the code, it seems that there is no standard way of extracting > the FSB speed. For each processor model, you have different MSRs. I would > think that the routines in the cpufreq code could be moved out and used > as the basis to expose the information somewhere in /sys.
... yet not all CPU's *have* an FSB. Notably AMD ones do not, and I'm sure you've read on a lot of online tech magazines that other vendors may also not have one in the future :-)
Exposing a concept that we KNOW does not make sense via a kernel interface (which means we need to keep it around forever) is in my opinion quite a bad mistake to make.... Please lets not do this.
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