Commit-ID: 161149513b3570ebd7fe14fc2ddc42cb46557e37 Gitweb: http://git.kernel.org/tip/161149513b3570ebd7fe14fc2ddc42cb46557e37 Author: Yunlong Song <[email protected]> AuthorDate: Fri, 27 Feb 2015 18:21:26 +0800 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Fri, 27 Feb 2015 15:51:51 -0300
perf list: Allow listing events with 'tracepoint' prefix If somebody happens to name an event with the beginning of 'tracepoint' (e.g. tracepoint_foo), then it will never be showed with perf list event_glob, thus we parse the argument 'tracepoint' more carefully for accuracy. Example: Before this patch: $ perf list tracepoint_foo:* jbd2:jbd2_start_commit [Tracepoint event] jbd2:jbd2_commit_locking [Tracepoint event] jbd2:jbd2_run_stats [Tracepoint event] block:block_rq_issue [Tracepoint event] block:block_bio_complete [Tracepoint event] block:block_bio_backmerge [Tracepoint event] block:block_getrq [Tracepoint event] ... ... As shown above, all of the tracepoint events are printed. In fact, the command's real intention is to print the events of tracepoint_foo. After this patch: $ perf list tracepoint_foo:* tracepoint_foo:tp_foo_enter [Tracepoint event] tracepoint_foo:tp_foo_exit [Tracepoint event] As shown above, only the events of tracepoint_foo are printed. Signed-off-by: Yunlong Song <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/builtin-list.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c index ad8018e..2acbcf0 100644 --- a/tools/perf/builtin-list.c +++ b/tools/perf/builtin-list.c @@ -50,9 +50,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused) } for (i = 0; i < argc; ++i) { - if (i) - putchar('\n'); - if (strncmp(argv[i], "tracepoint", 10) == 0) + if (strcmp(argv[i], "tracepoint") == 0) print_tracepoint_events(NULL, NULL, false); else if (strcmp(argv[i], "hw") == 0 || strcmp(argv[i], "hardware") == 0) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
