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=-12.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,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 7FC90C43387 for ; Thu, 3 Jan 2019 13:24:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58EDA2070C for ; Thu, 3 Jan 2019 13:24:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731679AbfACNYR (ORCPT ); Thu, 3 Jan 2019 08:24:17 -0500 Received: from terminus.zytor.com ([198.137.202.136]:38815 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730107AbfACNYQ (ORCPT ); Thu, 3 Jan 2019 08:24:16 -0500 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id x03DOA1s1387240 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 3 Jan 2019 05:24:10 -0800 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id x03DOApI1387237; Thu, 3 Jan 2019 05:24:10 -0800 Date: Thu, 3 Jan 2019 05:24:10 -0800 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Adrian Hunter Message-ID: Cc: acme@redhat.com, adrian.hunter@intel.com, jolsa@kernel.org, linux-kernel@vger.kernel.org, mingo@kernel.org, hpa@zytor.com, tglx@linutronix.de Reply-To: tglx@linutronix.de, hpa@zytor.com, mingo@kernel.org, linux-kernel@vger.kernel.org, jolsa@kernel.org, adrian.hunter@intel.com, acme@redhat.com In-Reply-To: <20181221120620.9659-5-adrian.hunter@intel.com> References: <20181221120620.9659-5-adrian.hunter@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf thread-stack: Allow for a thread stack array Git-Commit-ID: f6060ac60190c625101a0b94c2d96e9ca14a7d73 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: f6060ac60190c625101a0b94c2d96e9ca14a7d73 Gitweb: https://git.kernel.org/tip/f6060ac60190c625101a0b94c2d96e9ca14a7d73 Author: Adrian Hunter AuthorDate: Fri, 21 Dec 2018 14:06:16 +0200 Committer: Arnaldo Carvalho de Melo CommitDate: Wed, 2 Jan 2019 10:49:51 -0300 perf thread-stack: Allow for a thread stack array In preparation for fixing thread stack processing for the idle task, allow for a thread stack array. Signed-off-by: Adrian Hunter Acked-by: Jiri Olsa Link: http://lkml.kernel.org/r/20181221120620.9659-5-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/thread-stack.c | 40 ++++++++++++++++++++++++++++++++++------ 1 file changed, 34 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/thread-stack.c b/tools/perf/util/thread-stack.c index d93cd286b048..a5f7b9d8fc23 100644 --- a/tools/perf/util/thread-stack.c +++ b/tools/perf/util/thread-stack.c @@ -60,6 +60,7 @@ struct thread_stack_entry { * @last_time: last timestamp * @crp: call/return processor * @comm: current comm + * @arr_sz: size of array if this is the first element of an array */ struct thread_stack { struct thread_stack_entry *stack; @@ -71,6 +72,7 @@ struct thread_stack { u64 last_time; struct call_return_processor *crp; struct comm *comm; + unsigned int arr_sz; }; static int thread_stack__grow(struct thread_stack *ts) @@ -100,6 +102,8 @@ static struct thread_stack *thread_stack__new(struct thread *thread, if (!ts) return NULL; + ts->arr_sz = 1; + if (thread_stack__grow(ts)) { free(ts); return NULL; @@ -234,11 +238,19 @@ static int __thread_stack__flush(struct thread *thread, struct thread_stack *ts) int thread_stack__flush(struct thread *thread) { struct thread_stack *ts = thread->ts; + unsigned int pos; + int err = 0; - if (ts) - return __thread_stack__flush(thread, ts); + if (ts) { + for (pos = 0; pos < ts->arr_sz; pos++) { + int ret = __thread_stack__flush(thread, ts + pos); - return 0; + if (ret) + err = ret; + } + } + + return err; } int thread_stack__event(struct thread *thread, u32 flags, u64 from_ip, @@ -314,13 +326,29 @@ void thread_stack__set_trace_nr(struct thread *thread, u64 trace_nr) } } +static void __thread_stack__free(struct thread *thread, struct thread_stack *ts) +{ + __thread_stack__flush(thread, ts); + zfree(&ts->stack); +} + +static void thread_stack__reset(struct thread *thread, struct thread_stack *ts) +{ + unsigned int arr_sz = ts->arr_sz; + + __thread_stack__free(thread, ts); + memset(ts, 0, sizeof(*ts)); + ts->arr_sz = arr_sz; +} + void thread_stack__free(struct thread *thread) { struct thread_stack *ts = thread->ts; + unsigned int pos; if (ts) { - __thread_stack__flush(thread, ts); - zfree(&ts->stack); + for (pos = 0; pos < ts->arr_sz; pos++) + __thread_stack__free(thread, ts + pos); zfree(&thread->ts); } } @@ -611,7 +639,7 @@ int thread_stack__process(struct thread *thread, struct comm *comm, if (ts && !ts->crp) { /* Supersede thread_stack__event() */ - thread_stack__free(thread); + thread_stack__reset(thread, ts); ts = NULL; }