Messages in this thread | | | Date | Fri, 3 Jul 2009 09:24:00 +0200 | From | Ingo Molnar <> | Subject | Re: [patch 0/4] perf_counter tools: support annotation of live kernel modules |
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* Mike Galbraith <efault@gmx.de> wrote:
> On Thu, 2009-07-02 at 14:10 +0200, Peter Zijlstra wrote: > > On Thu, 2009-07-02 at 09:17 +0200, Mike Galbraith wrote: > > > > > I've been pondering a perf archive tool > > > that would package everything that's needed to do analysis on a > > > different box. One big problem though, is that while you can easily > > > package vmlinux and modules, what about all the userland binaries? A > > > large perf.data and/or debug info binaries can easily make transport > > > impractical enough. > > > > I would simply extend the current file header with another section in > > which we do a structured storage of the data structures we currently > > build in perf-report. That is, the dso and symbol bits. > > > > If we then run perf-report on a file containing such a section we read > > that data instead of trying to locate them the regular way. > > That's a good idea. > > If uname doesn't match stored record time uname, you're not live, > so tools require an exportable perf.data. If you're not live and > not on the same host, annotate requires binaries appended via an > export tool with --sym-filter -k -u -% whatever capability.
'perf export' could be a nice shortcut to convert a local perf.data into a off-line analysable body of data.
Ingo
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