From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F39ECC433E2 for ; Fri, 10 Jul 2020 13:43:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B328A207BB for ; Fri, 10 Jul 2020 13:43:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MhVboXMB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727963AbgGJNn5 (ORCPT ); Fri, 10 Jul 2020 09:43:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726774AbgGJNnz (ORCPT ); Fri, 10 Jul 2020 09:43:55 -0400 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CBA2CC08C5CE for ; Fri, 10 Jul 2020 06:43:55 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id 1so2552427pfn.9 for ; Fri, 10 Jul 2020 06:43:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=TevwpdpkGTIVWOgepqkuv2WRKI9YZMyHnPvrWjpZh1I=; b=MhVboXMBdFFVfnOs7V/gZpF68Cj0ht7NMM+wcZ67SIomfXTimXIYUiX41WEmbC9Xrz UxHm90MyS6zVlgVBpHL7w0T4gRfXiFuIA/fwzY9r8JB6IMUqmGwXzqSmFA0gOPI+bXjI J10xxWXr4nJHBekiPMohLW5aDwNb/ATxlGW1bnssMiy1TQ1Kf3mUAdkwgLlEzWAJHmwl 8NOc9Ue8qrhXgSUxigxtMUheLLAwpsk2twHtu8BWbOrt4iZ2D6RKOHdwPmDJG0exphtb 1mfjEIOeUhSwUm7GquQkWErIifLjQwqlwo017Gedt0EOQvIILQmu8ytspJ7d8pOKFDWe hMQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=TevwpdpkGTIVWOgepqkuv2WRKI9YZMyHnPvrWjpZh1I=; b=dgSJ9ueklc8oXZFqhXt7szZHo+9/U6KywvjRBIds8zOLvP/M2tjxE6w83mk8YHyUn8 8O5UctrtJh5MNXJyilRUb9a7AuDTDKmLHwSLxRyP6pjkC6ZJAIzhGghPKpzfecfzPUSQ 30Hu7ZIbrE/nngA6zbUTEm/qi978xEKXkuVWmA2oGXbnjvWBpmwDPQULS0sx9Hg6mO0J ZywdWEuhC37ddPXPNji6sjHsAK1wzLhxSdPr4juCUtBHz41CPFmBNShzemR/ONWzqpea hRawRUGj3RlSgbY3HW4+5ABRgRu8LaheMomAwp+jnUwedNs1UY7UYrCTZpdb2PPp/mZk 2nKw== X-Gm-Message-State: AOAM530R/RweXK9b/bDP8STlMjVeeKgrJi1UVrMQPl6Z7sevboAtptyB PoiTymoAfhBzNlFPi2p8w04= X-Google-Smtp-Source: ABdhPJwffSup+gsmMjOAOvY4Qwxs6l3HzZ2n69Y1wTrfuArpzUYQCPxR2ZHYzvS/UY1/F9uxAQNA5A== X-Received: by 2002:a63:100b:: with SMTP id f11mr56200560pgl.287.1594388635383; Fri, 10 Jul 2020 06:43:55 -0700 (PDT) Received: from vultr.guest ([149.248.10.52]) by smtp.gmail.com with ESMTPSA id 198sm6297363pfb.27.2020.07.10.06.43.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Jul 2020 06:43:54 -0700 (PDT) From: Changbin Du To: Jiri Olsa , Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Ingo Molnar , Namhyung Kim , Steven Rostedt , linux-kernel@vger.kernel.org, Changbin Du Subject: [PATCH v4 01/17] perf ftrace: select function/function_graph tracer automatically Date: Fri, 10 Jul 2020 21:43:06 +0800 Message-Id: <20200710134322.15400-2-changbin.du@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200710134322.15400-1-changbin.du@gmail.com> References: <20200710134322.15400-1-changbin.du@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The '-g/-G' options have already implied function_graph tracer should be used instead of function tracer. So the extra option '--tracer' can be killed. This patch changes the behavior as below: - By default, function tracer is used. - If '-g' or '-G' option is on, then function_graph tracer is used. - The perf configuration item 'ftrace.tracer' is marked as deprecated. - The option '--tracer' is marked as deprecated. Here are some examples. This will start tracing all functions using function tracer: $ sudo perf ftrace This will trace all functions using function graph tracer: $ sudo perf ftrace -G This will trace function vfs_read using function graph tracer: $ sudo perf ftrace -G vfs_read Signed-off-by: Changbin Du --- v3: remove default '*' for -G/-T. --- tools/perf/Documentation/perf-config.txt | 5 ----- tools/perf/Documentation/perf-ftrace.txt | 2 +- tools/perf/builtin-ftrace.c | 15 ++++++++++----- 3 files changed, 11 insertions(+), 11 deletions(-) diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt index c7d3df5798e2..a25fee7de3b2 100644 --- a/tools/perf/Documentation/perf-config.txt +++ b/tools/perf/Documentation/perf-config.txt @@ -612,11 +612,6 @@ trace.*:: "libbeauty", the default, to use the same argument beautifiers used in the strace-like sys_enter+sys_exit lines. -ftrace.*:: - ftrace.tracer:: - Can be used to select the default tracer. Possible values are - 'function' and 'function_graph'. - llvm.*:: llvm.clang-path:: Path to clang. If omit, search it from $PATH. diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt index b80c84307dc9..952e46669168 100644 --- a/tools/perf/Documentation/perf-ftrace.txt +++ b/tools/perf/Documentation/perf-ftrace.txt @@ -24,7 +24,7 @@ OPTIONS -t:: --tracer=:: - Tracer to use: function_graph or function. + Tracer to use: function_graph or function. This option is deprecated. -v:: --verbose=:: diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 2bfc1b0db536..5f53da87040d 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -27,7 +27,6 @@ #include "util/cap.h" #include "util/config.h" -#define DEFAULT_TRACER "function_graph" struct perf_ftrace { struct evlist *evlist; @@ -419,6 +418,7 @@ static int perf_ftrace_config(const char *var, const char *value, void *cb) if (strcmp(var, "ftrace.tracer")) return -1; + pr_warning("Configuration ftrace.tracer is deprecated\n"); if (!strcmp(value, "function_graph") || !strcmp(value, "function")) { ftrace->tracer = value; @@ -459,7 +459,7 @@ int cmd_ftrace(int argc, const char **argv) { int ret; struct perf_ftrace ftrace = { - .tracer = DEFAULT_TRACER, + .tracer = "function", .target = { .uid = UINT_MAX, }, }; const char * const ftrace_usage[] = { @@ -469,7 +469,7 @@ int cmd_ftrace(int argc, const char **argv) }; const struct option ftrace_options[] = { OPT_STRING('t', "tracer", &ftrace.tracer, "tracer", - "tracer to use: function_graph(default) or function"), + "tracer to use: function or function_graph (This option is deprecated)"), OPT_STRING('p', "pid", &ftrace.target.pid, "pid", "trace on existing process id"), OPT_INCR('v', "verbose", &verbose, @@ -479,11 +479,13 @@ int cmd_ftrace(int argc, const char **argv) OPT_STRING('C', "cpu", &ftrace.target.cpu_list, "cpu", "list of cpus to monitor"), OPT_CALLBACK('T', "trace-funcs", &ftrace.filters, "func", - "trace given functions only", parse_filter_func), + "trace given functions using function tracer", + parse_filter_func), OPT_CALLBACK('N', "notrace-funcs", &ftrace.notrace, "func", "do not trace given functions", parse_filter_func), OPT_CALLBACK('G', "graph-funcs", &ftrace.graph_funcs, "func", - "Set graph filter on given functions", parse_filter_func), + "trace given functions using function_graph tracer", + parse_filter_func), OPT_CALLBACK('g', "nograph-funcs", &ftrace.nograph_funcs, "func", "Set nograph filter on given functions", parse_filter_func), OPT_INTEGER('D', "graph-depth", &ftrace.graph_depth, @@ -505,6 +507,9 @@ int cmd_ftrace(int argc, const char **argv) if (!argc && target__none(&ftrace.target)) ftrace.target.system_wide = true; + if (!list_empty(&ftrace.graph_funcs) || !list_empty(&ftrace.nograph_funcs)) + ftrace.tracer = "function_graph"; + ret = target__validate(&ftrace.target); if (ret) { char errbuf[512]; -- 2.25.1