From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759646AbcLASDD (ORCPT ); Thu, 1 Dec 2016 13:03:03 -0500 Received: from merlin.infradead.org ([205.233.59.134]:49684 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758532AbcLASC7 (ORCPT ); Thu, 1 Dec 2016 13:02:59 -0500 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, David Ahern , David Ahern , Jiri Olsa , Namhyung Kim , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH 10/19] perf kmem stat: Track memory freed Date: Thu, 1 Dec 2016 15:02:26 -0300 Message-Id: <20161201180235.18392-11-acme@kernel.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20161201180235.18392-1-acme@kernel.org> References: <20161201180235.18392-1-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Ahern 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 d426dcb18ce9..7fd6f1e1e293 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", -- 2.9.3