From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 645B9C433E1 for ; Wed, 8 Jul 2020 12:49:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 419E920775 for ; Wed, 8 Jul 2020 12:49:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594212554; bh=Uqa5Ixx9A8DkN2H2K4w6mWtGsN4oJbAFIYsvEF105uM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=1rGABpptcUjpBTrNB/I/frhPmDZ+k+fK107PobLVm/12BFgxn6Op8Zzev+E0TJ4RD /F845WkJjkZsMmL11ZYHbW2CZi1KmD/YXl34VcuulMcnz7OM5pBp66aavEK2MELIvU ay07x9cVsI3+GU6ax64cOHFmDpvh61MGao0t8fTw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729337AbgGHMtN (ORCPT ); Wed, 8 Jul 2020 08:49:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:53910 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729122AbgGHMtM (ORCPT ); Wed, 8 Jul 2020 08:49:12 -0400 Received: from localhost (fw-tnat.cambridge.arm.com [217.140.96.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0B4A620775; Wed, 8 Jul 2020 12:49:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594212552; bh=Uqa5Ixx9A8DkN2H2K4w6mWtGsN4oJbAFIYsvEF105uM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=oKbE2oFg2VMewf3p7Ik1zsK0oPUYm+PwxqnkQ3WyNwSaGQ+vK8bZ9pf7YiB1ykQXH XU3WCRTnd/8w1PxUBPh0r2Sq+WwCReWyrIGJMMqt77XDx21WOrQ4qLYv3To6Ef4nbj c5RMeN5svZBNGIr/TZziTEiSoPwEkXfcdR2Eldbs= Date: Wed, 8 Jul 2020 13:49:03 +0100 From: Mark Brown To: Douglas Anderson Cc: Andy Gross , Bjorn Andersson , akashast@codeaurora.org, linux-arm-msm@vger.kernel.org, mkshah@codeaurora.org, swboyd@chromium.org, georgi.djakov@linaro.org, ctheegal@codeaurora.org, mka@chromium.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org Subject: Re: [PATCH 3/3] spi: spi-geni-qcom: Get rid of most overhead in prepare_message() Message-ID: <20200708124903.GN4655@sirena.org.uk> References: <20200702004509.2333554-1-dianders@chromium.org> <20200701174506.3.I2b3d7aeb1ea622335482cce60c58d2f8381e61dd@changeid> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Xb8pJpF45Qg/t7GZ" Content-Disposition: inline In-Reply-To: <20200701174506.3.I2b3d7aeb1ea622335482cce60c58d2f8381e61dd@changeid> X-Cookie: Oh Dad! We're ALL Devo! User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Xb8pJpF45Qg/t7GZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Jul 01, 2020 at 05:45:09PM -0700, Douglas Anderson wrote: > There's a bunch of overhead in spi-geni-qcom's prepare_message. Get > rid of it. Before this change spi_geni_prepare_message() took around > 14.5 us. After this change, spi_geni_prepare_message() takes about > 1.75 us (as measured by ftrace). Acked-by: Mark Brown --Xb8pJpF45Qg/t7GZ Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl8FwL4ACgkQJNaLcl1U h9D4Rgf/Uva2syJm8KRxZ3zqSrynarhaL0MlZwq4rb26hTPp7LnZs8TIOfboQ2aP ReLvfYszSbgQhhIFxtZAnJAVpwEz2twAVROsnO0/K26NmqaV5/p0Z1KyPCPfgQfW N7LN4MOtDh97n84llxMtJJG8P8Tqoje0YRAuQdwSIC9LkcRCvNe02yRdJ9cnPMzX OTOYc4avIDtmWA+t+K7nyDJ1RoQmAqDyejMsUEy32LO1UmlW64hZ8njrNyZRisUu +8XdZqLO/aiQOTxuvxXbTH7ZltyFd+kkwlksVqDVVto2THb5RDJ20/+MdU8arQYF sN8xdQTvufuZYgkETqAeW5REBVttHQ== =/s94 -----END PGP SIGNATURE----- --Xb8pJpF45Qg/t7GZ--