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=-14.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 C5797C433E6 for ; Sat, 2 Jan 2021 22:06:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C9F520798 for ; Sat, 2 Jan 2021 22:06:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727330AbhABWGU convert rfc822-to-8bit (ORCPT ); Sat, 2 Jan 2021 17:06:20 -0500 Received: from us-smtp-delivery-44.mimecast.com ([205.139.111.44]:51322 "EHLO us-smtp-delivery-44.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727280AbhABWGT (ORCPT ); Sat, 2 Jan 2021 17:06:19 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-218-4DduToGYP-i2lJ8aM3uO6w-1; Sat, 02 Jan 2021 17:05:20 -0500 X-MC-Unique: 4DduToGYP-i2lJ8aM3uO6w-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1DF6D107ACE3; Sat, 2 Jan 2021 22:05:19 +0000 (UTC) Received: from krava.redhat.com (unknown [10.40.192.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 45CE819727; Sat, 2 Jan 2021 22:05:16 +0000 (UTC) From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: lkml , Peter Zijlstra , Ingo Molnar , Mark Rutland , Namhyung Kim , Alexander Shishkin , Michael Petlan , Ian Rogers , Stephane Eranian , Alexei Budankov Subject: [PATCH 10/22] perf daemon: Add signal command Date: Sat, 2 Jan 2021 23:04:29 +0100 Message-Id: <20210102220441.794923-11-jolsa@kernel.org> In-Reply-To: <20210102220441.794923-1-jolsa@kernel.org> References: <20210102220441.794923-1-jolsa@kernel.org> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jolsa@kernel.org X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: kernel.org Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset=WINDOWS-1252 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allow perf daemon to send SIGUSR2 to all running sessions or just to a specific session. Example: # cat ~/.perfconfig [daemon] base=/opt/perfdata [session-cycles] run = -m 10M -e cycles --overwrite --switch-output -a [session-sched] run = -m 20M -e sched:* --overwrite --switch-output -a Starting the daemon: # perf daemon start Send signal to all running sessions: # perf daemon signal signal 12 sent to session 'cycles [773738]' signal 12 sent to session 'sched [773739]' Or to specific one: # perf daemon signal --session sched signal 12 sent to session 'sched [773739]' And verify signals were delivered and perf.data dumped: # cat /opt/perfdata/session-cycles/output rounding mmap pages size to 32M (8192 pages) [ perf record: dump data: Woken up 1 times ] [ perf record: Dump perf.data.2021010220382490 ] # car /opt/perfdata/session-sched/output rounding mmap pages size to 32M (8192 pages) [ perf record: dump data: Woken up 1 times ] [ perf record: Dump perf.data.2021010220382489 ] [ perf record: dump data: Woken up 1 times ] [ perf record: Dump perf.data.2021010220393745 ] Signed-off-by: Jiri Olsa --- tools/perf/builtin-daemon.c | 64 ++++++++++++++++++++++++++++++++++++- 1 file changed, 63 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c index 644f196d7f39..a7ffbecf8d14 100644 --- a/tools/perf/builtin-daemon.c +++ b/tools/perf/builtin-daemon.c @@ -522,10 +522,13 @@ static int setup_server_socket(struct daemon *daemon) } enum { - CMD_LIST = 0, + CMD_LIST = 0, + CMD_SIGNAL = 1, CMD_MAX, }; +#define SESSION_MAX 64 + union cmd { int cmd; @@ -535,6 +538,13 @@ union cmd { int verbose; char csv_sep; } list; + + /* CMD_SIGNAL */ + struct { + int cmd; + int sig; + char name[SESSION_MAX]; + } signal; }; static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out) @@ -592,6 +602,24 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out) return 0; } +static int cmd_session_kill(struct daemon *daemon, union cmd *cmd, FILE *out) +{ + struct session *session; + bool all = false; + + all = !strcmp(cmd->signal.name, "all"); + + list_for_each_entry(session, &daemon->sessions, list) { + if (all || !strcmp(cmd->signal.name, session->name)) { + session__signal(session, cmd->signal.sig); + fprintf(out, "signal %d sent to session '%s [%d]'\n", + cmd->signal.sig, session->name, session->pid); + } + } + + return 0; +} + static int handle_server_socket(struct daemon *daemon, int sock_fd) { int ret = -EINVAL, fd; @@ -619,6 +647,9 @@ static int handle_server_socket(struct daemon *daemon, int sock_fd) case CMD_LIST: ret = cmd_session_list(daemon, &cmd, out); break; + case CMD_SIGNAL: + ret = cmd_session_kill(daemon, &cmd, out); + break; default: break; } @@ -933,6 +964,34 @@ static int send_cmd_list(struct daemon *daemon) return send_cmd(daemon, &cmd); } +static int __cmd_signal(struct daemon *daemon, struct option parent_options[], + int argc, const char **argv) +{ + const char *name = "all"; + struct option start_options[] = { + OPT_STRING(0, "session", &name, "session", + "Sent signal to specific session"), + OPT_PARENT(parent_options), + OPT_END() + }; + union cmd cmd; + + argc = parse_options(argc, argv, start_options, daemon_usage, 0); + if (argc) + usage_with_options(daemon_usage, start_options); + + if (setup_config(daemon)) { + pr_err("failed: config not found\n"); + return -1; + } + + cmd.signal.cmd = CMD_SIGNAL, + cmd.signal.sig = SIGUSR2; + strncpy(cmd.signal.name, name, sizeof(cmd.signal.name) - 1); + + return send_cmd(daemon, &cmd); +} + int cmd_daemon(int argc, const char **argv) { struct option daemon_options[] = { @@ -954,6 +1013,9 @@ int cmd_daemon(int argc, const char **argv) return __cmd_start(&__daemon, daemon_options, argc, argv); if (argc) { + if (!strcmp(argv[0], "signal")) + return __cmd_signal(&__daemon, daemon_options, argc, argv); + pr_err("failed: unknown command '%s'\n", argv[0]); return -1; } -- 2.26.2