From nobody Mon Apr 13 15:47:47 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35C6DC433FE for ; Mon, 14 Nov 2022 21:09:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237576AbiKNVJX (ORCPT ); Mon, 14 Nov 2022 16:09:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237712AbiKNVIz (ORCPT ); Mon, 14 Nov 2022 16:08:55 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC2236556 for ; Mon, 14 Nov 2022 13:08:52 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id b17-20020a25b851000000b006e32b877068so1820852ybm.16 for ; Mon, 14 Nov 2022 13:08:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=HIf5Y9gptGCDfzfHbnNjnA19mp6qRpBDngBttcXhem0=; b=GZZvStXHmV1H/jsQ47y9n//yaqltl/vwRLrf6lcIZ4n2MbmDx8/ILodhf/TEK75Z8h vXUnxC0uMPqpB2vpMCDlnHSYpQa3dRDuEOq5vKovpKq+6HygbUCE6CxFPDJH2gM7E1Qi FLLrolhCv9gq604BrlQkqDDkLA0ofnmSvLMWXDxOFhh1tp3dzVRpVhvk+6L+WKvrsVor lZZe4gUEvOzHpoof7kQuiiR3Iu6mUFZeHXN9XKZ/SHkRgkMgQxrKpvFCK5p45B5IA+sK mZuaxZ2n64tLPPGQlcOe5C8WIbk7k11MRMslThYNuZJYNMKQH3QxYYmA0Xhgz2/jqeDP fDLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=HIf5Y9gptGCDfzfHbnNjnA19mp6qRpBDngBttcXhem0=; b=WCfiHuyAtsPUTrVStbc+Yz+7cK/RGJfsgJXkMbpYv4H4aVzu+7frNHrdjx4Xp1Papn fZNyT4p8pY6QzW8hJgfIGyGzm/sbvABP1WFEUngd+Ujof2LrfaiKmHDaZgLTAK41xD2v EcyG5TJ71ZhOgknlbhlVflNyvMzmIlMpI0jMDZrNoKAXWUFVLIXJoD8xCHmA4Q5AsJck yxibkQ3CFgsI+VcQrtWLYNkq2ZUm5DCL0czVKa/jJ3R+fHjNw3R9gfiZqMENr4+8tPG0 JVxm4luREzMM+VbUxeR8jK+AZe9hgn0EQxh2EH/Ovo1Gu4l4nccL9UF7jox2VvxUke8b PrrA== X-Gm-Message-State: ANoB5pmxIfWZ7tDaIPkE0xWT5vrKLxYoF8tiNai591flU/tn1vJ7m1JB lNveU19gU+FILTX+T1f6zMAWzRhgBWUc X-Google-Smtp-Source: AA0mqf4iUCGjqHHy6le8WzwURkFlzhXoc/qhYuUsB8WjG8LnurJrKZI5KTY7Z/hdnQqtsNRqBFQconWgEbKj X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:553:438f:b86a:87f]) (user=irogers job=sendgmr) by 2002:a0d:d596:0:b0:36a:bc93:587c with SMTP id x144-20020a0dd596000000b0036abc93587cmr15112789ywd.59.1668460132140; Mon, 14 Nov 2022 13:08:52 -0800 (PST) Date: Mon, 14 Nov 2022 13:07:20 -0800 In-Reply-To: <20221114210723.2749751-1-irogers@google.com> Message-Id: <20221114210723.2749751-8-irogers@google.com> Mime-Version: 1.0 References: <20221114210723.2749751-1-irogers@google.com> X-Mailer: git-send-email 2.38.1.431.g37b22c650d-goog Subject: [PATCH v3 07/10] perf list: Simplify symbol event printing From: Ian Rogers To: Weilin Wang , Perry Taylor , Caleb Biggers , Leo Yan , Adrian Hunter , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Sandipan Das , Kajol Jain , Zhengjun Xing , Kan Liang , Ravi Bangoria , Xin Gao , Rob Herring , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Stephane Eranian , Ian Rogers Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The current code computes an array of symbol names then sorts and prints them. Use a strlist to create a list of names that is sorted and then print it. Signed-off-by: Ian Rogers --- tools/perf/util/print-events.c | 79 +++++++++------------------------- 1 file changed, 21 insertions(+), 58 deletions(-) diff --git a/tools/perf/util/print-events.c b/tools/perf/util/print-events.c index ff7793944246..d53dba033597 100644 --- a/tools/perf/util/print-events.c +++ b/tools/perf/util/print-events.c @@ -52,14 +52,6 @@ static const struct event_symbol event_symbols_tool[PERF= _TOOL_MAX] =3D { }, }; =20 -static int cmp_string(const void *a, const void *b) -{ - const char * const *as =3D a; - const char * const *bs =3D b; - - return strcmp(*as, *bs); -} - /* * Print the events from /tracing/events */ @@ -298,77 +290,48 @@ void print_symbol_events(const char *event_glob, unsi= gned int type, struct event_symbol *syms, unsigned int max, bool name_only) { - unsigned int i, evt_i =3D 0, evt_num =3D 0; - char name[MAX_NAME_LEN]; - char **evt_list =3D NULL; - bool evt_num_known =3D false; - -restart: - if (evt_num_known) { - evt_list =3D zalloc(sizeof(char *) * evt_num); - if (!evt_list) - goto out_enomem; - syms -=3D max; - } + struct strlist *evt_name_list =3D strlist__new(NULL, NULL); + struct str_node *nd; =20 - for (i =3D 0; i < max; i++, syms++) { + if (!evt_name_list) { + pr_debug("Failed to allocate new strlist for symbol events\n"); + return; + } + for (unsigned int i =3D 0; i < max; i++) { /* * New attr.config still not supported here, the latest * example was PERF_COUNT_SW_CGROUP_SWITCHES */ - if (syms->symbol =3D=3D NULL) + if (syms[i].symbol =3D=3D NULL) continue; =20 - if (event_glob !=3D NULL && !(strglobmatch(syms->symbol, event_glob) || - (syms->alias && strglobmatch(syms->alias, event_glob)))) + if (event_glob !=3D NULL && !(strglobmatch(syms[i].symbol, event_glob) || + (syms[i].alias && strglobmatch(syms[i].alias, event_glob)))) continue; =20 if (!is_event_supported(type, i)) continue; =20 - if (!evt_num_known) { - evt_num++; - continue; - } - - if (!name_only && strlen(syms->alias)) - snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); - else - strlcpy(name, syms->symbol, MAX_NAME_LEN); + if (strlen(syms[i].alias)) { + char name[MAX_NAME_LEN]; =20 - evt_list[evt_i] =3D strdup(name); - if (evt_list[evt_i] =3D=3D NULL) - goto out_enomem; - evt_i++; + snprintf(name, MAX_NAME_LEN, "%s OR %s", syms[i].symbol, syms[i].alias); + strlist__add(evt_name_list, name); + } else + strlist__add(evt_name_list, syms[i].symbol); } =20 - if (!evt_num_known) { - evt_num_known =3D true; - goto restart; - } - qsort(evt_list, evt_num, sizeof(char *), cmp_string); - evt_i =3D 0; - while (evt_i < evt_num) { + strlist__for_each_entry(nd, evt_name_list) { if (name_only) { - printf("%s ", evt_list[evt_i++]); + printf("%s ", nd->s); continue; } - printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]= ); + printf(" %-50s [%s]\n", nd->s, event_type_descriptors[type]); } - if (evt_num && pager_in_use()) + if (!strlist__empty(evt_name_list) && pager_in_use()) printf("\n"); =20 -out_free: - evt_num =3D evt_i; - for (evt_i =3D 0; evt_i < evt_num; evt_i++) - zfree(&evt_list[evt_i]); - zfree(&evt_list); - return; - -out_enomem: - printf("FATAL: not enough memory to print %s\n", event_type_descriptors[t= ype]); - if (evt_list) - goto out_free; + strlist__delete(evt_name_list); } =20 /* --=20 2.38.1.431.g37b22c650d-goog