From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936209AbcI3Dao (ORCPT ); Thu, 29 Sep 2016 23:30:44 -0400 Received: from mail-it0-f67.google.com ([209.85.214.67]:33641 "EHLO mail-it0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935913AbcI3D3s (ORCPT ); Thu, 29 Sep 2016 23:29:48 -0400 From: Jia He To: netdev@vger.kernel.org Cc: linux-sctp@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, Alexey Kuznetsov , James Morris , Hideaki YOSHIFUJI , Patrick McHardy , Vlad Yasevich , Neil Horman , Steffen Klassert , Herbert Xu , marcelo.leitner@gmail.com, Jia He Subject: [PATCH v6 5/7] proc: Reduce cache miss in xfrm_statistics_seq_show Date: Fri, 30 Sep 2016 11:29:02 +0800 Message-Id: <1475206144-23228-6-git-send-email-hejianet@gmail.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1475206144-23228-1-git-send-email-hejianet@gmail.com> References: <1475206144-23228-1-git-send-email-hejianet@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is to use the generic interfaces snmp_get_cpu_field{,64}_batch to aggregate the data by going through all the items of each cpu sequentially. Signed-off-by: Jia He --- net/xfrm/xfrm_proc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/net/xfrm/xfrm_proc.c b/net/xfrm/xfrm_proc.c index 9c4fbd8..ba2b539 100644 --- a/net/xfrm/xfrm_proc.c +++ b/net/xfrm/xfrm_proc.c @@ -50,12 +50,18 @@ static const struct snmp_mib xfrm_mib_list[] = { static int xfrm_statistics_seq_show(struct seq_file *seq, void *v) { + unsigned long buff[LINUX_MIB_XFRMMAX]; struct net *net = seq->private; int i; + + memset(buff, 0, sizeof(unsigned long) * LINUX_MIB_XFRMMAX); + + snmp_get_cpu_field_batch(buff, xfrm_mib_list, + net->mib.xfrm_statistics); for (i = 0; xfrm_mib_list[i].name; i++) seq_printf(seq, "%-24s\t%lu\n", xfrm_mib_list[i].name, - snmp_fold_field(net->mib.xfrm_statistics, - xfrm_mib_list[i].entry)); + buff[i]); + return 0; } -- 2.5.5