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    SubjectRe: HT and idle = poll
    On Thu, Mar 06, 2003 at 02:22:48PM -0800, Martin J. Bligh wrote:

    > BTW, could someone give a brief summary of why idle=poll is needed for
    > oprofile, I'd love to add it do the "documentation for dummies" file I
    > was writing.

    Because events like CPU_CLK_UNHALTED don't tick when the cpu is halted,
    so the idle time doesn't show up properly in the kernel profile.
    idle=poll doesn't hlt so the profile for poll_idle() reflects the actual
    idle percentage.

    Something like that anyway.

    john
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