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=-11.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 3F396CA9EAF for ; Tue, 22 Oct 2019 00:04:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D1422084C for ; Tue, 22 Oct 2019 00:04:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730661AbfJVAEZ convert rfc822-to-8bit (ORCPT ); Mon, 21 Oct 2019 20:04:25 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:38895 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387508AbfJVAEX (ORCPT ); Mon, 21 Oct 2019 20:04:23 -0400 Received: from [5.158.153.53] (helo=tip-bot2.lab.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1iMgxK-00049G-ES; Tue, 22 Oct 2019 01:19:18 +0200 Received: from [127.0.1.1] (localhost [IPv6:::1]) by tip-bot2.lab.linutronix.de (Postfix) with ESMTP id 894361C04D7; Tue, 22 Oct 2019 01:19:11 +0200 (CEST) Date: Mon, 21 Oct 2019 23:19:11 -0000 From: "tip-bot2 for Arnaldo Carvalho de Melo" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: perf/core] perf trace: Filter own pid to avoid a feedback look in 'perf trace record -a' Cc: Andi Kleen , Adrian Hunter , David Ahern , Jiri Olsa , Luis =?utf-8?q?Cl=C3=A1udio_Gon=C3=A7alves?= , Namhyung Kim , Arnaldo Carvalho de Melo , Ingo Molnar , Borislav Petkov , linux-kernel@vger.kernel.org In-Reply-To: References: MIME-Version: 1.0 Message-ID: <157169995114.29376.6162722012242994606.tip-bot2@tip-bot2> X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8BIT X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the perf/core branch of tip: Commit-ID: 7fbfe22cf4cfe01a88704dd76ca65d108039d297 Gitweb: https://git.kernel.org/tip/7fbfe22cf4cfe01a88704dd76ca65d108039d297 Author: Arnaldo Carvalho de Melo AuthorDate: Mon, 14 Oct 2019 20:13:51 -03:00 Committer: Arnaldo Carvalho de Melo CommitterDate: Tue, 15 Oct 2019 13:03:57 -03:00 perf trace: Filter own pid to avoid a feedback look in 'perf trace record -a' When doing a system wide 'perf trace record' we need, just like in 'perf trace' live mode, to filter out perf trace's own pid, so set up a tracepoint filter for the raw_syscalls tracepoints right after adding them to the argv array that is set up to then call cmd_record(). Reported-by: Andi Kleen Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Luis Cláudio Gonçalves Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-uysx5w8f2y5ndoln5cq370tv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 467e18e..cdee22d 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -2796,21 +2796,23 @@ static int trace__record(struct trace *trace, int argc, const char **argv) "-m", "1024", "-c", "1", }; - + pid_t pid = getpid(); + char *filter = asprintf__tp_filter_pids(1, &pid); const char * const sc_args[] = { "-e", }; unsigned int sc_args_nr = ARRAY_SIZE(sc_args); const char * const majpf_args[] = { "-e", "major-faults" }; unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); const char * const minpf_args[] = { "-e", "minor-faults" }; unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); + int err = -1; - /* +1 is for the event string below */ - rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + + /* +3 is for the event string below and the pid filter */ + rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + majpf_args_nr + minpf_args_nr + argc; rec_argv = calloc(rec_argc + 1, sizeof(char *)); - if (rec_argv == NULL) - return -ENOMEM; + if (rec_argv == NULL || filter == NULL) + goto out_free; j = 0; for (i = 0; i < ARRAY_SIZE(record_args); i++) @@ -2827,11 +2829,13 @@ static int trace__record(struct trace *trace, int argc, const char **argv) rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; else { pr_err("Neither raw_syscalls nor syscalls events exist.\n"); - free(rec_argv); - return -1; + goto out_free; } } + rec_argv[j++] = "--filter"; + rec_argv[j++] = filter; + if (trace->trace_pgfaults & TRACE_PFMAJ) for (i = 0; i < majpf_args_nr; i++) rec_argv[j++] = majpf_args[i]; @@ -2843,7 +2847,11 @@ static int trace__record(struct trace *trace, int argc, const char **argv) for (i = 0; i < (unsigned int)argc; i++) rec_argv[j++] = argv[i]; - return cmd_record(j, rec_argv); + err = cmd_record(j, rec_argv); +out_free: + free(filter); + free(rec_argv); + return err; } static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);