Messages in this thread Patch in this message | | | Date | Thu, 10 Dec 2015 15:06:35 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 5/7] perf top: Delay UI browser setup after initialization is done |
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Em Thu, Dec 10, 2015 at 02:52:05PM -0300, Arnaldo Carvalho de Melo escreveu: > Em Thu, Dec 10, 2015 at 02:43:32PM -0300, Arnaldo Carvalho de Melo escreveu: > > Em Thu, Dec 10, 2015 at 12:00:57PM +0900, Namhyung Kim escreveu: > > > Move setup_browser after all necessary initialization is done. This > > > is to remove the browser dependency from usage_with_options() and > > > friends. > > > > So, please try: > > > > perf top -C 0 -p 1 > > > > So that we get a command line validation error that will cause cmd_top > > to trip this: > > > > status = target__validate(target); > > if (status) { > > target__strerror(target, status, errbuf, BUFSIZ); > > ui__warning("%s\n", errbuf); > > } > > > > ui__warning() will emit the warning to stdio, and this message will be > > seen only after the user exits the tool: > > So, this one should be enough, ack?
if (perf_evlist__create_maps(top.evlist, target) < 0) { - ui__error("Not enough memory to create thread/cpu maps\n"); + ui__error("Couldn't create thread/CPU maps: %s\n", + errno == ENOENT ? "No such process" : strerror_r(errno, errbuf, sizeof(errbuf))); goto out_delete_evlist; } I'm adding "Introduce perf_evlist__strerror_create_maps()" to my TODO list at https://perf.wiki.kernel.org/index.php/Todo > From 83c5eb5124210a579f174d37af8f0ce4f21264ff Mon Sep 17 00:00:00 2001 > From: Arnaldo Carvalho de Melo <acme@redhat.com> > Date: Thu, 10 Dec 2015 14:48:45 -0300 > Subject: [PATCH] perf report: Do show usage message when failing to create > cpu/thread maps > > This is necessary to get rid of the browser dependency from > usage_with_options() and its friends. Because we validate the targets > which are used to create the cpu/thread maps and inform the user about > any override performed via the chosen UI, we don't need to call the > usage routine for that.
> Cc: Namhyung Kim <namhyung@kernel.org> > Cc: Josh Poimboeuf <jpoimboe@redhat.com> > Cc: David Ahern <dsahern@gmail.com> > Cc: Jiri Olsa <jolsa@redhat.com> > Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> > Link: http://lkml.kernel.org/n/tip-slu7lj7buzpwgop1vo9la8ma@git.kernel.org > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> > --- > tools/perf/builtin-top.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c > index 7e2e72e6d9d1..4eb9c6906219 100644 > --- a/tools/perf/builtin-top.c > +++ b/tools/perf/builtin-top.c > @@ -1279,8 +1279,10 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) > if (target__none(target)) > target->system_wide = true; > > - if (perf_evlist__create_maps(top.evlist, target) < 0) > - usage_with_options(top_usage, options); > + if (perf_evlist__create_maps(top.evlist, target) < 0) { > + ui__error("Not enough memory to create thread/cpu maps\n"); > + goto out_delete_evlist; > + } > > if (!top.evlist->nr_entries && > perf_evlist__add_default(top.evlist) < 0) { > -- > 1.8.3.1 >
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