From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752631AbbJYPLz (ORCPT ); Sun, 25 Oct 2015 11:11:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42229 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751554AbbJYOwO (ORCPT ); Sun, 25 Oct 2015 10:52:14 -0400 From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: lkml , David Ahern , Ingo Molnar , Namhyung Kim , Peter Zijlstra , "Liang, Kan" Subject: [PATCH 01/52] perf cpu_map: Add cpu_map__empty_new function Date: Sun, 25 Oct 2015 15:51:17 +0100 Message-Id: <1445784728-21732-2-git-send-email-jolsa@kernel.org> In-Reply-To: <1445784728-21732-1-git-send-email-jolsa@kernel.org> References: <1445784728-21732-1-git-send-email-jolsa@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding cpu_map__empty_new interface to create empty cpumap with given size. The cpumap entries are initialized with -1. It'll be used for caching cpu_map in following patches. Link: http://lkml.kernel.org/n/tip-2q9tmp3shdscmtiv6h8afhvd@git.kernel.org Signed-off-by: Jiri Olsa --- tools/perf/util/cpumap.c | 17 +++++++++++++++++ tools/perf/util/cpumap.h | 1 + 2 files changed, 18 insertions(+) diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index aa6b490aa471..10af1e7524fb 100644 --- a/tools/perf/util/cpumap.c +++ b/tools/perf/util/cpumap.c @@ -203,6 +203,23 @@ struct cpu_map *cpu_map__dummy_new(void) return cpus; } +struct cpu_map *cpu_map__empty_new(int nr) +{ + struct cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int) * nr); + + if (cpus != NULL) { + int i; + + cpus->nr = nr; + for (i = 0; i < nr; i++) + cpus->map[i] = -1; + + atomic_set(&cpus->refcnt, 1); + } + + return cpus; +} + static void cpu_map__delete(struct cpu_map *map) { if (map) { diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h index f1bcd2cfa164..85f7772457fa 100644 --- a/tools/perf/util/cpumap.h +++ b/tools/perf/util/cpumap.h @@ -15,6 +15,7 @@ struct cpu_map { }; struct cpu_map *cpu_map__new(const char *cpu_list); +struct cpu_map *cpu_map__empty_new(int nr); struct cpu_map *cpu_map__dummy_new(void); struct cpu_map *cpu_map__read(FILE *file); size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp); -- 2.4.3