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    SubjectRe: [PATCH 1/2] perf tools: Add reference timestamp to perf header
    Em Mon, Dec 13, 2010 at 06:18:19PM +0100, Peter Zijlstra escreveu:
    > On Mon, 2010-12-13 at 18:15 +0100, Frederic Weisbecker wrote:
    > > On Mon, Dec 13, 2010 at 06:11:29PM +0100, Peter Zijlstra wrote:
    > > > On Mon, 2010-12-13 at 18:09 +0100, Frederic Weisbecker wrote:
    > > > > So this should be the last one to add. Something like PERF_RECORD_GEN_EVT
    > > > > that has a field in its headers containing a sub-type which can be this
    > > > > wall clock but can also host about everything in the future.
    > > > >
    > > > > This way we don't propagate more the possible overlap with the kernel.
    > > >
    > > > I don't see why we should add more, that's going the wrong direction.
    > >
    > > This must be the last one.
    >
    > No, the last one already happened, you cannot postpone the last one,
    > there will always be another excuse.

    Did you understand the use case? How to have multiple reference times
    when appending?

    "last one" means adding a multiplexor, PERF_RECORD_LAST_ONE if you will,
    and inside it we add new events if the need arises. Then never again we
    add a PERF_RECORD_ event in userspace.

    - Arnaldo


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