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    SubjectRe: [PATCH 5/5] perf buildid-list: New plumbing command
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    On Mon, 2009-11-16 at 17:41 -0200, Arnaldo Carvalho de Melo wrote:
    > Em Mon, Nov 16, 2009 at 07:58:52PM +0100, Frederic Weisbecker escreveu:
    > > On Mon, Nov 16, 2009 at 04:32:45PM -0200, Arnaldo Carvalho de Melo wrote:
    > > > With this we can list the buildids in a perf.data file so that we can
    > > > pipe them to other, distro specific tools that from the buildids can
    > > > figure out separate packages (foo-debuginfo) where we can find the
    > > > matching symtabs so that perf report can do its job.
    > > > E.g:
    > > > [acme@doppio linux-2.6-tip]$ perf buildid-list | head -2
    > > > 8e08b117e5458ad3f85da16d42d0fc5cd21c5869
    > > > 520c2387a587cc5acfcf881e27dba1caaeab4b1f
    > > > [acme@doppio linux-2.6-tip]$ perf buildid-list -v | head -2
    > > > 8e08b117e5458ad3f85da16d42d0fc5cd21c5869 /sbin/init
    > > > 520c2387a587cc5acfcf881e27dba1caaeab4b1f /lib64/ld-2.10.1.so
    > >
    > > I would rather see the effect of this -v option as the default.
    > > It's very useful to see the dso resolved but hashes alone
    > > don't pay much.
    >
    > I disagree, the main purpose of this command is equivalent to 'git
    > rev-list':
    >
    > [acme@doppio linux-2.6-tip]$ git rev-list HEAD^^..
    > 089242a8c826aac1c827bb797475b9852fe0db49
    > 18e3a75dc47d8397bbf0936ec8e3ebdecada7ba1
    > [acme@doppio linux-2.6-tip]$
    >
    > I.e. provide content keys that then will be used by distro specific
    > porcelain to get the matching -debuginfo packages with the symtabs.

    I'm pretty sure such distro specific muck can trivially ignore the
    second column.

    And the output is much _much_ more useful when it has the dso listed.



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