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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61EFFC433EF for ; Fri, 25 Feb 2022 10:36:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239631AbiBYKhB (ORCPT ); Fri, 25 Feb 2022 05:37:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239643AbiBYKg7 (ORCPT ); Fri, 25 Feb 2022 05:36:59 -0500 X-Greylist: delayed 64 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 25 Feb 2022 02:36:25 PST Received: from esa12.hc1455-7.c3s2.iphmx.com (esa12.hc1455-7.c3s2.iphmx.com [139.138.37.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 118C929DD52; Fri, 25 Feb 2022 02:36:25 -0800 (PST) IronPort-SDR: DibmdeHjlOFNowuKLV0Dp7lXHcEDpQyJ4NvUNmqDBj1hIi7+CnKKzyNXNOQ+gv/KIdCclwwpjm 53I8KDKzrCvxp2BjCwiuRuIdYTnS6ueTLAy0VB/8rPMvlh6OnypTmbAvssj6umYJqQZnNZYBtE f22pCyFsIWDdMbHBwfPYX/tlZos1Vw0aM5LjMOAgDNtL+g7AffPRH1TMiL9Z6kVyJ64idsEDie opq24uZ7h5D54yPrzxCRPWxHGLtwBfQiJp7BOQ/uAo/0Q2WAoV9eOKwQcxpYuCBevhiVYhUhbW v1Gl6fvHgoogVkBsHuy0pXdA X-IronPort-AV: E=McAfee;i="6200,9189,10268"; a="43953260" X-IronPort-AV: E=Sophos;i="5.90,136,1643641200"; d="scan'208";a="43953260" Received: from unknown (HELO oym-r1.gw.nic.fujitsu.com) ([210.162.30.89]) by esa12.hc1455-7.c3s2.iphmx.com with ESMTP; 25 Feb 2022 19:35:18 +0900 Received: from oym-m3.gw.nic.fujitsu.com (oym-nat-oym-m3.gw.nic.fujitsu.com [192.168.87.60]) by oym-r1.gw.nic.fujitsu.com (Postfix) with ESMTP id D31A1F617A; Fri, 25 Feb 2022 19:35:17 +0900 (JST) Received: from yto-om3.fujitsu.com (yto-om3.o.css.fujitsu.com [10.128.89.164]) by oym-m3.gw.nic.fujitsu.com (Postfix) with ESMTP id DF49CD95E7; Fri, 25 Feb 2022 19:35:16 +0900 (JST) Received: from localhost.localdomain (bakeccha.fct.css.fujitsu.com [10.126.195.136]) by yto-om3.fujitsu.com (Postfix) with ESMTP id C8B9B40124EEE; Fri, 25 Feb 2022 19:35:16 +0900 (JST) From: Shunsuke To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Shunsuke Nakamura Subject: [RFC PATCH 4/7] libperf: Add perf_evsel__set_signal() functions Date: Fri, 25 Feb 2022 19:31:11 +0900 Message-Id: <20220225103114.144239-5-nakamura.shun@fujitsu.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220225103114.144239-1-nakamura.shun@fujitsu.com> References: <20220225103114.144239-1-nakamura.shun@fujitsu.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org From: Shunsuke Nakamura Add the following functions: perf_evsel__set_signal() perf_evsel__set_signal_cpu() to set the parameters to get the overflow signal. Signed-off-by: Shunsuke Nakamura --- tools/lib/perf/Documentation/libperf.txt | 4 + tools/lib/perf/evsel.c | 105 +++++++++++++++++++++++ tools/lib/perf/include/perf/evsel.h | 6 ++ tools/lib/perf/libperf.map | 2 + 4 files changed, 117 insertions(+) diff --git a/tools/lib/perf/Documentation/libperf.txt b/tools/lib/perf/Documentation/libperf.txt index 8f523293fb9d..d0aa57c6ca97 100644 --- a/tools/lib/perf/Documentation/libperf.txt +++ b/tools/lib/perf/Documentation/libperf.txt @@ -151,6 +151,10 @@ SYNOPSIS int cpu_map_idx); int perf_evsel__period(struct perf_evsel *evsel, int period); int perf_evsel__period_cpu(struct perf_evsel *evsel, int period, int cpu_map_idx); + int perf_evsel__set_signal(struct perf_evsel *evsel, int owner_type, unsigned int signal, + struct sigaction *sig); + int perf_evsel__set_signal_cpu(struct perf_evsel *evsel, int owner_type, unsigned int signal, + struct sigaction *sig, int cpu_map_idx); struct perf_cpu_map *perf_evsel__cpus(struct perf_evsel *evsel); struct perf_thread_map *perf_evsel__threads(struct perf_evsel *evsel); struct perf_event_attr *perf_evsel__attr(struct perf_evsel *evsel); diff --git a/tools/lib/perf/evsel.c b/tools/lib/perf/evsel.c index 8348545874e4..991ab04112b1 100644 --- a/tools/lib/perf/evsel.c +++ b/tools/lib/perf/evsel.c @@ -1,4 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif #include #include #include @@ -16,6 +19,9 @@ #include #include #include +#include +#include +#include #include #include @@ -351,6 +357,28 @@ static int perf_evsel__run_ioctl(struct perf_evsel *evsel, return 0; } +static int perf_evsel__run_fcntl(struct perf_evsel *evsel, + unsigned int cmd, unsigned long arg, + int cpu_map_idx) +{ + int thread; + + for (thread = 0; thread < xyarray__max_y(evsel->fd); thread++) { + int err; + int *fd = FD(evsel, cpu_map_idx, thread); + + if (!fd || *fd < 0) + return -1; + + err = fcntl(*fd, cmd, arg); + + if (err) + return err; + } + + return 0; +} + int perf_evsel__enable_cpu(struct perf_evsel *evsel, int cpu_map_idx) { return perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_ENABLE, 0, cpu_map_idx); @@ -437,6 +465,83 @@ int perf_evsel__period(struct perf_evsel *evsel, __u64 period) return err; } +int perf_evsel__set_signal_cpu(struct perf_evsel *evsel, int owner_type, unsigned int signal, + struct sigaction *sig, int cpu_map_idx) +{ + int err = 0; + struct f_owner_ex owner; + + switch (owner_type) { + case F_OWNER_PID: + owner.pid = getpid(); + break; + case F_OWNER_TID: + owner.pid = syscall(SYS_gettid); + break; + default: + return -1; + } + + err = perf_evsel__run_fcntl(evsel, F_SETFL, (O_RDWR | O_NONBLOCK | O_ASYNC), cpu_map_idx); + if (err) + return err; + + err = perf_evsel__run_fcntl(evsel, F_SETSIG, signal, cpu_map_idx); + if (err) + return err; + + err = perf_evsel__run_fcntl(evsel, F_SETOWN_EX, (unsigned long)&owner, cpu_map_idx); + if (err) + return err; + + err = sigaction(signal, sig, NULL); + if (err) + return err; + + return err; +} + +int perf_evsel__set_signal(struct perf_evsel *evsel, int owner_type, unsigned int signal, + struct sigaction *sig) +{ + int i; + int err = 0; + struct f_owner_ex owner; + + switch (owner_type) { + case F_OWNER_PID: + owner.pid = getpid(); + break; + case F_OWNER_TID: + owner.pid = syscall(SYS_gettid); + break; + default: + return -1; + } + + owner.type = owner_type; + + for (i = 0; i < xyarray__max_x(evsel->fd) && !err; i++) { + err = perf_evsel__run_fcntl(evsel, F_SETFL, (O_RDWR | O_NONBLOCK | O_ASYNC), i); + if (err) + return err; + + err = perf_evsel__run_fcntl(evsel, F_SETSIG, signal, i); + if (err) + return err; + + err = perf_evsel__run_fcntl(evsel, F_SETOWN_EX, (unsigned long)&owner, i); + if (err) + return err; + } + + err = sigaction(signal, sig, NULL); + if (err) + return err; + + return err; +} + int perf_evsel__apply_filter(struct perf_evsel *evsel, const char *filter) { int err = 0, i; diff --git a/tools/lib/perf/include/perf/evsel.h b/tools/lib/perf/include/perf/evsel.h index 9ec24a5f5f9f..15768fc91910 100644 --- a/tools/lib/perf/include/perf/evsel.h +++ b/tools/lib/perf/include/perf/evsel.h @@ -5,6 +5,7 @@ #include #include #include +#include #include struct perf_evsel; @@ -43,6 +44,11 @@ LIBPERF_API int perf_evsel__refresh_cpu(struct perf_evsel *evsel, int refresh, int cpu_map_idx); LIBPERF_API int perf_evsel__period(struct perf_evsel *evsel, __u64 period); LIBPERF_API int perf_evsel__period_cpu(struct perf_evsel *evsel, __u64 period, int cpu_map_idx); +LIBPERF_API int perf_evsel__set_signal(struct perf_evsel *evsel, int owner_type, + unsigned int signal, struct sigaction *sig); +LIBPERF_API int perf_evsel__set_signal_cpu(struct perf_evsel *evsel, int owner_type, + unsigned int signal, struct sigaction *sig, + int cpu_map_idx); LIBPERF_API struct perf_cpu_map *perf_evsel__cpus(struct perf_evsel *evsel); LIBPERF_API struct perf_thread_map *perf_evsel__threads(struct perf_evsel *evsel); LIBPERF_API struct perf_event_attr *perf_evsel__attr(struct perf_evsel *evsel); diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map index 83ecbce9cfbb..5e04fe2b611c 100644 --- a/tools/lib/perf/libperf.map +++ b/tools/lib/perf/libperf.map @@ -32,6 +32,8 @@ LIBPERF_0.0.1 { perf_evsel__refresh_cpu; perf_evsel__period; perf_evsel__period_cpu; + perf_evsel__set_signal; + perf_evsel__set_signal_cpu; perf_evsel__cpus; perf_evsel__threads; perf_evsel__attr; -- 2.31.1