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    SubjectRe: [PATCH -tip v4 0/7] perf: Introduce branch sub commands
    (2011/05/26 22:28), Frederic Weisbecker wrote:
    > (Adding David Ahern in Cc)
    > Ok that's all good except this needs to use the "perf script" centralized
    > dump.
    > Currently running "perf script" without an actual script dumps
    > the events by default, whatever kind of event they are: hardware,
    > software, tracepoints, ...
    > So we want the branch output to be supported there, so we can reuse
    > some code and interface.
    > For example, "perf script -f branch:comm,tid,sym" would print the
    > comm, tid and the sym for to and from addresses.
    > That's better than creating a new set of options in a new command
    > that people need to relearn while everybody could simply get
    > familiarized with common perf script options.
    > Of course we can still have a "perf branch" command, which could
    > be a tiny shortcut that maps to perf record and perf script.
    > Like:
    > perf branch record
    > perf branch [trace] -f tid,sym,comm
    > Would map to:
    > perf record branch:u
    > perf script -f branch:tid,sym,comm
    > And may be if one day we can do something more tricky than a
    > linear output for branches (like source code coloring/browsing),
    > then it may be implemented inside perf branch and not rely on
    > another subcommand. Until then we are only dealing with raw linear
    > dump, and that's a core job for perf script where we want to
    > centralize that kind of facility.
    I agreed that the core job is dumpimg BTS logs on perf script.

    Next, I'd like to implement the perf-branch's functions and
    additional interfaces to perf script.
    For example, resoving symbols and dso about branch_to address and,
    adding interfaces to get source file path, line number using debuginfo.

    I presented about perf-branch's future plan in LinuxCon Japan 2011,
    please refer the follwing slide.
    (The slide will be available soon)

    Thank you.

    > Thanks.

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