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perf top: 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: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
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>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-12-10 14:48:45 -03:00
parent b3f38fc242
commit f8a5c0b24b
1 changed files with 5 additions and 2 deletions
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7
tools/perf/builtin-top.c
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@ -1279,8 +1279,11 @@ 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("Couldn't create thread/CPU maps: %s\n",
errno == ENOENT ? "No such process" : strerror_r(errno, errbuf, sizeof(errbuf)));
goto out_delete_evlist;
}
if (!top.evlist->nr_entries &&
perf_evlist__add_default(top.evlist) < 0) {