From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752078AbbKYPzE (ORCPT ); Wed, 25 Nov 2015 10:55:04 -0500 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:15106 "EHLO mx0a-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751378AbbKYPzA (ORCPT ); Wed, 25 Nov 2015 10:55:00 -0500 Date: Wed, 25 Nov 2015 23:50:49 +0800 From: Jisheng Zhang To: , , CC: , Subject: Re: [PATCH v3 0/2] clocksource/drivers/dw_apb_timer: improve performance a bit Message-ID: <20151125235049.1d742846@xhacker> In-Reply-To: <1448466514-5298-1-git-send-email-jszhang@marvell.com> References: <1448466514-5298-1-git-send-email-jszhang@marvell.com> X-Mailer: Claws Mail 3.13.0 (GTK+ 2.24.28; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2015-11-25_11:,, signatures=0 X-Proofpoint-Spam-Details: rule=inbound_notspam policy=inbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1507310000 definitions=main-1511250278 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 25 Nov 2015 23:48:32 +0800 Jisheng Zhang wrote: > These two patches try to improve the dw_apb_timer clocksource/clockevent > performance. These patches depends on the apbt_readl return value fix patch: http://lists.infradead.org/pipermail/linux-arm-kernel/2015-November/388250.html thanks, Jisheng > > since v2: > - only use relaxed version in critical path > - inline apbt_readl/apbt_writel > - add some performance numbers > > since v1: > - correct the wrong sentence in commit msg about writel performance on > CA9 with outer L2 cache. Thank Arnd for pointing out this in another > thread. > > Jisheng Zhang (2): > clocksource/drivers/dw_apb_timer: Inline apbt_readl and apbt_writel > clocksource/drivers/dw_apb_timer: Use {readl|writel}_relaxed in > critical path > > drivers/clocksource/dw_apb_timer.c | 30 +++++++++++++++++++++--------- > 1 file changed, 21 insertions(+), 9 deletions(-) >