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    SubjectRe: Unified tracing buffer

    > By the way, systemtap uses two modes;
    > - single-channel mode
    > In this mode, all cpus share one buffer channel to write and read.
    > each writer locks spinlock and write a probe-local data to buffer.
    > - per-cpu buffer mode
    > In this mode, we use an atomic sequential number for ordering data. If
    > user doesn't need it(because they have their own timestamps), they can
    > choose not to use that seq-number.

    I can't imazine a merit of the single-channel mode.
    Could you please explain it?

    Because some architecture don't have fine grained timestamp?
    if so, could you explain which architecture don't have it?

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      Last update: 2008-09-23 16:41    [W:0.021 / U:1.216 seconds]
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