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    SubjectFwd: x86_64 and AMD with C1E
    01 Oct 2007 11:33:48 +0200, Andi Kleen <>:
    > Mikhail Kshevetskiy <> writes:
    > >
    > > The same situation can be observed for linux-2.6.22.
    > You're saying 2.6.22/x86-64 without any patches doesn't boot out of the box
    > with C1E enabled? If yes what are the exact symptoms?
    > -Andi

    No, it boot and work normally. The only thing i bother, is the
    additional 260 timer interrupts per seconds.
    Here is short result:

    c1e enabled:
    -- power consumption about 23 watts
    -- there is only C1 power state enabled
    -- there are about 260 timer interrupts per seconds
    tested with x86_64(2.6.22, 2.6.23-rc8, 2.6.23-rc8-hrt1 ),
    i386(2.6.21, 2.6.22, 2.6.23-rc5-hrt1)

    c1e disabled:
    -- power consumption about 27 watts
    -- there are no any power state enabled (including C1)
    -- there are no additional 260 timer interrupts per seconds
    tested with 2.6.23-rc6-hrt1/x86_64.

    I want to reduce the power consumption of my notebook. I see the 2 possibility:
    -- remove 260 additional timer interrupts (c1e enabled case )
    -- force enable C1, C2 and C3 states (c1e disabled case)
    Do you have any idea how it can be reached?

    Mikhail Kshevetskiy
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