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    SubjectRe: 2.6.24-rc4-git5: Reported regressions from 2.6.23
    On Tue, 11 Dec 2007 01:01:25 +0100
    Guillaume Chazarain <guichaz@yahoo.fr> wrote:

    > Arjan van de Ven <arjan@infradead.org> wrote:
    >
    > > the frequency of both cores is the maximum of what linux sets each
    > > core to;
    >
    > Do you mean that the cpufreq code can be confused about the actual
    > frequency of the cores?

    it means that cpufreq doesn't know the actual frequency (although bios sometimes tells us about the relationship, often the bios just lies through it's teeth); it only knows what it asks for, not what it gets. We know it'll get at least what it asks for, but it can get more than it asks for basically.

    >That sounds like a big problem.

    it'll get way worse going forward.
    (but even on todays systems, the tsc no longer represents frequency, but is some fixed clock totally unrelated to cpu frequency)

    --
    If you want to reach me at my work email, use arjan@linux.intel.com
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    visit http://www.lesswatts.org


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