From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756274Ab1LEMth (ORCPT ); Mon, 5 Dec 2011 07:49:37 -0500 Received: from terminus.zytor.com ([198.137.202.10]:56802 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754491Ab1LEMtg (ORCPT ); Mon, 5 Dec 2011 07:49:36 -0500 Date: Mon, 5 Dec 2011 04:48:31 -0800 From: tip-bot for Arnaldo Carvalho de Melo Message-ID: Cc: linux-kernel@vger.kernel.org, eranian@google.com, paulus@samba.org, acme@redhat.com, hpa@zytor.com, mingo@redhat.com, peterz@infradead.org, efault@gmx.de, fweisbec@gmail.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@redhat.com, hpa@zytor.com, acme@redhat.com, paulus@samba.org, eranian@google.com, linux-kernel@vger.kernel.org, efault@gmx.de, peterz@infradead.org, fweisbec@gmail.com, dsahern@gmail.com, tglx@linutronix.de To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf evlist: Handle default value for 'pages' on mmap method Git-Commit-ID: 50a682ce875f91e04c81ae5680535aba5a770bad X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6 (terminus.zytor.com [127.0.0.1]); Mon, 05 Dec 2011 04:48:37 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 50a682ce875f91e04c81ae5680535aba5a770bad Gitweb: http://git.kernel.org/tip/50a682ce875f91e04c81ae5680535aba5a770bad Author: Arnaldo Carvalho de Melo AuthorDate: Wed, 9 Nov 2011 09:10:47 -0200 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 28 Nov 2011 10:26:43 -0200 perf evlist: Handle default value for 'pages' on mmap method Every tool that calls this and allows the user to override the value needs this logic. Cc: David Ahern Cc: Frederic Weisbecker Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-lwscxpg57xfzahz5dmdfp9uz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 4 ---- tools/perf/util/evlist.c | 12 +++++++++--- tools/perf/util/evlist.h | 3 ++- 3 files changed, 11 insertions(+), 8 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 4799195..749862d 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -456,10 +456,6 @@ static int __cmd_record(int argc, const char **argv) perf_header__set_feat(&session->header, HEADER_NUMA_TOPOLOGY); perf_header__set_feat(&session->header, HEADER_CPUID); - /* 512 kiB: default amount of unprivileged mlocked memory */ - if (mmap_pages == UINT_MAX) - mmap_pages = (512 * 1024) / page_size; - if (forks) { err = perf_evlist__prepare_workload(evsel_list, &record_opts, argv); if (err < 0) { diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index a472247..81237dc 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -507,14 +507,20 @@ out_unmap: * * Using perf_evlist__read_on_cpu does this automatically. */ -int perf_evlist__mmap(struct perf_evlist *evlist, int pages, bool overwrite) +int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, + bool overwrite) { unsigned int page_size = sysconf(_SC_PAGE_SIZE); - int mask = pages * page_size - 1; struct perf_evsel *evsel; const struct cpu_map *cpus = evlist->cpus; const struct thread_map *threads = evlist->threads; - int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE); + int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; + + /* 512 kiB: default amount of unprivileged mlocked memory */ + if (pages == UINT_MAX) + pages = (512 * 1024) / page_size; + + mask = pages * page_size - 1; if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) return -ENOMEM; diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index 07d56b3..17e9c80 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -79,7 +79,8 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist, int perf_evlist__start_workload(struct perf_evlist *evlist); int perf_evlist__alloc_mmap(struct perf_evlist *evlist); -int perf_evlist__mmap(struct perf_evlist *evlist, int pages, bool overwrite); +int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, + bool overwrite); void perf_evlist__munmap(struct perf_evlist *evlist); void perf_evlist__disable(struct perf_evlist *evlist);