Messages in this thread |  | | Date | Sun, 2 Aug 2009 22:05:33 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 1/1 tip] perf report: Introduce -u/--unresolved-symbols |
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* Arnaldo Carvalho de Melo <acme@redhat.com> wrote:
> So that we can concentrate on getting more symtabs or on figuring out > which files we have to recompile with -g or ask proprietary vendors for > graciously ship us rich symtabs. > > For instance, shame on me: > > [acme@doppio ~]$ perf report -us comm,dso,symbol | head -7 > # Samples: 22501 > # > # Overhead Command Shared Object Symbol > # ........ ............ ............................................ ...... > # > 82.53% npviewer.bin /usr/lib64/mozilla/plugins/libflashplayer.so [.] 0x000000003820d7 > 6.34% skype /opt/skype_static-2.0.0.72/skype [.] 0x00000000e1e0b1 > > ;-) > > But the next cset should be rather nice, as I realized that doing: > > yum install /usr/lib/debug/<DSO NAME WITH MISSING SYMTAB>.debug > > Works! > > Now think about a world where: > > yum install /usr/lib/debug/<DSO NAME WITH MISSING SYMTAB>.symtab > > Works, makes the internet a better place by not downloading whales, > oops, debuginfo files full of crap we don't need. > > Don't get me wrong, the aforementioned crap has its place in this world, > just not for the perf tools, _so far_. > > Ah, and replace 'yum' with zypper, apt-get (I tried!), smart, urpmi, > whatever-is-your-still-non-standardized way to get needed pieces to do > real work. > > Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> > Cc: Frederic Weisbecker <fweisbec@gmail.com> > Cc: Mike Galbraith <efault@gmx.de> > Cc: Paul Mackerras <paulus@samba.org>, > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> > --- > tools/perf/Documentation/perf-report.txt | 5 +++++ > tools/perf/builtin-report.c | 11 +++++++++-- > 2 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt > index e72e931..86aec08 100644 > --- a/tools/perf/Documentation/perf-report.txt > +++ b/tools/perf/Documentation/perf-report.txt > @@ -48,6 +48,11 @@ OPTIONS > all occurances of this separator in symbol names (and other output) > with a '.' character, that thus it's the only non valid separator. > > +-u:: > +--unresolved-symbols > + > + Consider only unresolved symbols. > + > SEE ALSO > -------- > linkperf:perf-stat[1] > diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c > index a118bc7..c30f4cd 100644 > --- a/tools/perf/builtin-report.c > +++ b/tools/perf/builtin-report.c > @@ -52,6 +52,7 @@ static int modules; > > static int full_paths; > static int show_nr_samples; > +static int show_only_unresolved_symbols; > > static unsigned long page_size; > static unsigned long mmap_window = 32; > @@ -1556,8 +1557,12 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head) > if (dso_list && dso && dso->name && !strlist__has_entry(dso_list, dso->name)) > return 0; > > - if (sym_list && sym && !strlist__has_entry(sym_list, sym->name)) > - return 0; > + if (sym) { > + if (show_only_unresolved_symbols) > + return 0; > + if (sym_list && !strlist__has_entry(sym_list, sym->name)) > + return 0; > + } > > if (hist_entry__add(thread, map, dso, sym, ip, chain, level, period)) { > eprintf("problem incrementing symbol count, skipping event\n"); > @@ -2020,6 +2025,8 @@ static const struct option options[] = { > OPT_STRING('t', "field-separator", &field_sep, "separator", > "separator for columns, no spaces will be added between " > "columns '.' is reserved."), > + OPT_BOOLEAN('u', "unresolved-symbols", &show_only_unresolved_symbols, > + "Show only the symbols that were no resolved to names"), > OPT_END()
Looks nice!
How about also adding an option to initiate the yum install (or apt-get, etc.) debuginfo package installation automatically? It would be a nice 'plug and play' touch.
Ingo
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