From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756145AbcAHSHX (ORCPT ); Fri, 8 Jan 2016 13:07:23 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:59357 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755962AbcAHSDg (ORCPT ); Fri, 8 Jan 2016 13:03:36 -0500 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Namhyung Kim , Andi Kleen , David Ahern , Frederic Weisbecker , Peter Zijlstra , Steven Rostedt , Wang Nan , Arnaldo Carvalho de Melo Subject: [PATCH 10/59] perf tools: Support shortcuts for events in dynamic sort keys Date: Fri, 8 Jan 2016 15:02:17 -0300 Message-Id: <1452276186-15202-11-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1452276186-15202-1-git-send-email-acme@kernel.org> References: <1452276186-15202-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Namhyung Kim The dynamic sort key requires event name but specifying full event name is rather inconvenient. This patch adds more ways to identify the event in a more compact way. 1. If session has just one event, event name can be omitted. 2. Events can be accessed by index preceded by a percent sign. 3. A part of the name can be used, if it's not ambiguous. The partial name should not contain ':' in it. 4. Full system + event name is still used, it should contain ':'. So in the below example all does same thing: $ perf record -e sched:sched_switch -a sleep 1 $ perf report -s next_pid,next_comm $ perf report -s %1.next_pid,%1.next_comm $ perf report -s switch.next_pid,switch.next_comm $ perf report -s sched:sched_switch.next_pid,sched:sched_switch.next_comm Signed-off-by: Namhyung Kim Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: David Ahern Cc: Frederic Weisbecker Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Wang Nan Link: http://lkml.kernel.org/r/1450804030-29193-10-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/sort.c | 107 ++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 87 insertions(+), 20 deletions(-) diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 34776854626e..f3a98c25fb8d 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -1828,10 +1828,90 @@ __alloc_dynamic_entry(struct perf_evsel *evsel, struct format_field *field) return hde; } +static int parse_field_name(char *str, char **event, char **field, char **opt) +{ + char *event_name, *field_name, *opt_name; + + event_name = str; + field_name = strchr(str, '.'); + + if (field_name) { + *field_name++ = '\0'; + } else { + event_name = NULL; + field_name = str; + } + + opt_name = strchr(field_name, '/'); + if (opt_name) + *opt_name++ = '\0'; + + *event = event_name; + *field = field_name; + *opt = opt_name; + + return 0; +} + +/* find match evsel using a given event name. The event name can be: + * 1. NULL - only valid for single event session + * 2. '%' + event index (e.g. '%1' for first event) + * 3. full event name (e.g. sched:sched_switch) + * 4. partial event name (should not contain ':') + */ +static struct perf_evsel *find_evsel(struct perf_evlist *evlist, char *event_name) +{ + struct perf_evsel *evsel = NULL; + struct perf_evsel *pos; + bool full_name; + + /* case 1 */ + if (event_name == NULL) { + if (evlist->nr_entries != 1) { + pr_debug("event name should be given\n"); + return NULL; + } + + return perf_evlist__first(evlist); + } + + /* case 2 */ + if (event_name[0] == '%') { + int nr = strtol(event_name+1, NULL, 0); + + if (nr > evlist->nr_entries) + return NULL; + + evsel = perf_evlist__first(evlist); + while (--nr > 0) + evsel = perf_evsel__next(evsel); + + return evsel; + } + + full_name = !!strchr(event_name, ':'); + evlist__for_each(evlist, pos) { + /* case 3 */ + if (full_name && !strcmp(pos->name, event_name)) + return pos; + /* case 4 */ + if (!full_name && strstr(pos->name, event_name)) { + if (evsel) { + pr_debug("'%s' event is ambiguous: it can be %s or %s\n", + event_name, evsel->name, pos->name); + return NULL; + } + evsel = pos; + } + } + + return evsel; +} + static int add_dynamic_entry(struct perf_evlist *evlist, const char *tok) { - char *str, *event_name, *field_name, *raw_opt; - struct perf_evsel *evsel, *pos; + char *str, *event_name, *field_name, *opt_name; + struct perf_evsel *evsel; struct format_field *field; struct hpp_dynamic_entry *hde; bool raw_trace = symbol_conf.raw_trace; @@ -1844,34 +1924,21 @@ static int add_dynamic_entry(struct perf_evlist *evlist, const char *tok) if (str == NULL) return -ENOMEM; - event_name = str; - field_name = strchr(str, '.'); - if (field_name == NULL) { + if (parse_field_name(str, &event_name, &field_name, &opt_name) < 0) { ret = -EINVAL; goto out; } - *field_name++ = '\0'; - raw_opt = strchr(field_name, '/'); - if (raw_opt) { - *raw_opt++ = '\0'; - - if (strcmp(raw_opt, "raw")) { - pr_err("Unsupported field option %s\n", raw_opt); + if (opt_name) { + if (strcmp(opt_name, "raw")) { + pr_debug("unsupported field option %s\n", opt_name); ret = -EINVAL; goto out; } raw_trace = true; } - evsel = NULL; - evlist__for_each(evlist, pos) { - if (!strcmp(pos->name, event_name)) { - evsel = pos; - break; - } - } - + evsel = find_evsel(evlist, event_name); if (evsel == NULL) { pr_debug("Cannot find event: %s\n", event_name); ret = -ENOENT; -- 2.1.0