From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757612AbcEFA37 (ORCPT ); Thu, 5 May 2016 20:29:59 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:35270 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755736AbcEFA35 (ORCPT ); Thu, 5 May 2016 20:29:57 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Adrian Hunter , David Ahern , Jiri Olsa , Milian Wolff , Namhyung Kim , Wang Nan Subject: [PATCH 01/17] perf machine: Introduce number of threads member Date: Thu, 5 May 2016 21:29:24 -0300 Message-Id: <1462494580-27164-2-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1462494580-27164-1-git-send-email-acme@kernel.org> References: <1462494580-27164-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.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: Arnaldo Carvalho de Melo To be used, for instance, for pre-allocating an rb_tree array for sorting by other keys besides the current pid one. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Milian Wolff Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-ja0ifkwue7ttjhbwijn6g6eu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/machine.c | 7 ++++++- tools/perf/util/machine.h | 1 + 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 2cb95bbf9ea6..9d0913107dc7 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -32,6 +32,7 @@ int machine__init(struct machine *machine, const char *root_dir, pid_t pid) machine->threads = RB_ROOT; pthread_rwlock_init(&machine->threads_lock, NULL); + machine->nr_threads = 0; INIT_LIST_HEAD(&machine->dead_threads); machine->last_match = NULL; @@ -430,6 +431,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine, */ thread__get(th); machine->last_match = th; + ++machine->nr_threads; } return th; @@ -681,11 +683,13 @@ size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) size_t machine__fprintf(struct machine *machine, FILE *fp) { - size_t ret = 0; + size_t ret; struct rb_node *nd; pthread_rwlock_rdlock(&machine->threads_lock); + ret = fprintf(fp, "Threads: %u\n", machine->nr_threads); + for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { struct thread *pos = rb_entry(nd, struct thread, rb_node); @@ -1419,6 +1423,7 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th, pthread_rwlock_wrlock(&machine->threads_lock); rb_erase_init(&th->rb_node, &machine->threads); RB_CLEAR_NODE(&th->rb_node); + --machine->nr_threads; /* * Move it first to the dead_threads list, then drop the reference, * if this is the last reference, then the thread__delete destructor diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h index 4822de5e4544..83f46790c52f 100644 --- a/tools/perf/util/machine.h +++ b/tools/perf/util/machine.h @@ -31,6 +31,7 @@ struct machine { char *root_dir; struct rb_root threads; pthread_rwlock_t threads_lock; + unsigned int nr_threads; struct list_head dead_threads; struct thread *last_match; struct vdso_info *vdso_info; -- 2.5.5