From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934099AbcLBKk1 (ORCPT ); Fri, 2 Dec 2016 05:40:27 -0500 Received: from terminus.zytor.com ([198.137.202.10]:41758 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934042AbcLBKkY (ORCPT ); Fri, 2 Dec 2016 05:40:24 -0500 Date: Fri, 2 Dec 2016 02:39:48 -0800 From: tip-bot for David Ahern Message-ID: Cc: dsa@cumulusnetworks.com, acme@redhat.com, peterz@infradead.org, hpa@zytor.com, linux-kernel@vger.kernel.org, jolsa@kernel.org, tglx@linutronix.de, dsahern@gmail.com, namhyung@kernel.org, mingo@kernel.org Reply-To: tglx@linutronix.de, mingo@kernel.org, namhyung@kernel.org, dsahern@gmail.com, peterz@infradead.org, hpa@zytor.com, acme@redhat.com, dsa@cumulusnetworks.com, jolsa@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <1480110133-37039-1-git-send-email-dsahern@gmail.com> References: <1480110133-37039-1-git-send-email-dsahern@gmail.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf kmem stat: Track memory freed Git-Commit-ID: aa58e9afb613fab74f33292705bb43beb0f1828d 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 List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: aa58e9afb613fab74f33292705bb43beb0f1828d Gitweb: http://git.kernel.org/tip/aa58e9afb613fab74f33292705bb43beb0f1828d Author: David Ahern AuthorDate: Fri, 25 Nov 2016 14:42:13 -0700 Committer: Arnaldo Carvalho de Melo CommitDate: Tue, 29 Nov 2016 12:50:32 -0300 perf kmem stat: Track memory freed Track freed memory as well as allocations and show the net in the summary. Committer notes: Testing it: # perf kmem record usleep 1 [ perf record: Woken up 0 times to write data ] [ perf record: Captured and wrote 1.626 MB perf.data (4208 samples) ] [root@jouet ~]# perf kmem stat --slab SUMMARY (SLAB allocator) ======================== Total bytes requested: 234,011 Total bytes allocated: 234,504 Total bytes freed: 213,328 <------ Net total bytes allocated: 21,176 Total bytes wasted on internal fragmentation: 493 Internal fragmentation: 0.210231% Cross CPU allocations: 4/1,963 # Signed-off-by: David Ahern Tested-by: Arnaldo Carvalho de Melo Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1480110133-37039-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-kmem.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index d426dcb..7fd6f1e 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -49,6 +49,7 @@ struct alloc_stat { u64 ptr; u64 bytes_req; u64 bytes_alloc; + u64 last_alloc; u32 hit; u32 pingpong; @@ -62,7 +63,7 @@ static struct rb_root root_alloc_sorted; static struct rb_root root_caller_stat; static struct rb_root root_caller_sorted; -static unsigned long total_requested, total_allocated; +static unsigned long total_requested, total_allocated, total_freed; static unsigned long nr_allocs, nr_cross_allocs; static int insert_alloc_stat(unsigned long call_site, unsigned long ptr, @@ -105,6 +106,8 @@ static int insert_alloc_stat(unsigned long call_site, unsigned long ptr, } data->call_site = call_site; data->alloc_cpu = cpu; + data->last_alloc = bytes_alloc; + return 0; } @@ -223,6 +226,8 @@ static int perf_evsel__process_free_event(struct perf_evsel *evsel, if (!s_alloc) return 0; + total_freed += s_alloc->last_alloc; + if ((short)sample->cpu != s_alloc->alloc_cpu) { s_alloc->pingpong++; @@ -1128,6 +1133,11 @@ static void print_slab_summary(void) printf("\n========================\n"); printf("Total bytes requested: %'lu\n", total_requested); printf("Total bytes allocated: %'lu\n", total_allocated); + printf("Total bytes freed: %'lu\n", total_freed); + if (total_allocated > total_freed) { + printf("Net total bytes allocated: %'lu\n", + total_allocated - total_freed); + } printf("Total bytes wasted on internal fragmentation: %'lu\n", total_allocated - total_requested); printf("Internal fragmentation: %f%%\n",