Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932498Ab3HGKVe (ORCPT ); Wed, 7 Aug 2013 06:21:34 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:55306 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S932455Ab3HGKVD (ORCPT ); Wed, 7 Aug 2013 06:21:03 -0400 X-IronPort-AV: E=Sophos;i="4.89,832,1367942400"; d="scan'208";a="8143910" From: Lai Jiangshan To: "Paul E. McKenney" , Steven Rostedt , Peter Zijlstra , linux-kernel@vger.kernel.org Cc: Lai Jiangshan , Dipankar Sarma Subject: [PATCH 7/8] rcu: add # of deferred _special() statistics Date: Wed, 7 Aug 2013 18:25:03 +0800 Message-Id: <1375871104-10688-8-git-send-email-laijs@cn.fujitsu.com> X-Mailer: git-send-email 1.7.4.4 In-Reply-To: <1375871104-10688-1-git-send-email-laijs@cn.fujitsu.com> References: <1375871104-10688-1-git-send-email-laijs@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/08/07 18:19:36, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/08/07 18:19:36, Serialize complete at 2013/08/07 18:19:36 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1889 Lines: 51 Signed-off-by: Lai Jiangshan --- kernel/rcutree.h | 1 + kernel/rcutree_plugin.h | 1 + kernel/rcutree_trace.c | 1 + 3 files changed, 3 insertions(+), 0 deletions(-) diff --git a/kernel/rcutree.h b/kernel/rcutree.h index 4a39d36..a5e9643 100644 --- a/kernel/rcutree.h +++ b/kernel/rcutree.h @@ -290,6 +290,7 @@ struct rcu_data { unsigned long n_force_qs_snap; /* did other CPU force QS recently? */ long blimit; /* Upper limit on a processed batch */ + unsigned long n_defer_special;/* # of deferred _special() */ /* 3) dynticks interface. */ struct rcu_dynticks *dynticks; /* Shared per-CPU dynticks state. */ diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index c9ff9f1..d828eec 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -396,6 +396,7 @@ void rcu_read_unlock_special(struct task_struct *t, bool unlock) * is still unlikey to be true. */ if (unlikely(unlock && irqs_disabled_flags(flags))) { + this_cpu_ptr(&rcu_preempt_data)->n_defer_special++; set_need_resched(); local_irq_restore(flags); return; diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c index cf6c174..17d8b2c 100644 --- a/kernel/rcutree_trace.c +++ b/kernel/rcutree_trace.c @@ -149,6 +149,7 @@ static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) seq_printf(m, " ci=%lu nci=%lu co=%lu ca=%lu\n", rdp->n_cbs_invoked, rdp->n_nocbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); + seq_printf(m, " ds=%lu\n", rdp->n_defer_special); } static int show_rcudata(struct seq_file *m, void *v) -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/