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    SubjectRe: [PATCH] x86: Export tsc related information in sysfs
    On 05/18/2010 12:16 PM, Dan Magenheimer wrote:
    > Oops, hit send too soon.
    > And the reason I expect tglx/arjan/andi/mingo to disagree is because
    > their position is that there is NO safe use for rdtsc in userspace EVER!
    > Whereas your position stated earlier:
    >> There are restricted uses of the TSC in userspace which are still
    >> useful
    >> (mainly involving performance analysis and/or CPU-locked processes).
    > says there are.
    > While the engineer in me agrees with tglx/arjan/andi/mingo, the
    > realist in me agrees with you.

    I should have added "that are not related to wall time" to the statement

    Furthermore, vsyscalls are user space from a CPU perspective.


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