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=-7.5 required=3.0 tests=BAYES_00,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 3AC98C433E0 for ; Mon, 21 Dec 2020 16:52:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1046622C9C for ; Mon, 21 Dec 2020 16:52:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725892AbgLUQvu (ORCPT ); Mon, 21 Dec 2020 11:51:50 -0500 Received: from mail.kernel.org ([198.145.29.99]:54086 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725780AbgLUQvt (ORCPT ); Mon, 21 Dec 2020 11:51:49 -0500 Date: Mon, 21 Dec 2020 16:50:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1608569469; bh=yaViPjdmmsCzAeL0va1vlA3tAOMvU2QaaNbTzhk/M2U=; h=From:To:Cc:Subject:References:In-Reply-To:From; b=iWiBh9ZTafNuO4cox7HBuO1CJjjbyRjmEGOPidRxtKWcZCXUr1hFutQORYEO6hPa4 r6N/mb174I1cKh8kJvDVb2Ay3q+pKikPwhfWQam6HQVLukKgL9ug9X0yozFgssd5IC qYtbhN//od4WHh/LEkzdIXdugeu/Zyi9hQAefE3iO6hOYx9kHCgErtLeu1h9pKHbtD Nz3kO0hPcUmaW6XdkSIs2erF129lcL8ht1RRIlFbfB6lbO0JuQJJ7wSSToSqlCsVmO LxYLkNfKdFhQL2WRPKvHLNLI6W7lRHVg5Y+uaUQQWh8vOhFeUrhdSP2BLYHIMj7OHN muxd/uwoL8szw== From: Mark Brown To: Sowjanya Komatineni Cc: Pratyush Yadav , Boris Brezillon , thierry.reding@gmail.com, jonathanh@nvidia.com, robh+dt@kernel.org, lukas@wunner.de, bbrezillon@kernel.org, tudor.ambarus@microchip.com, linux-spi@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit Message-ID: <20201221165053.GA4521@sirena.org.uk> References: <1608236927-28701-1-git-send-email-skomatineni@nvidia.com> <1608236927-28701-6-git-send-email-skomatineni@nvidia.com> <20201218092106.skwej2g6bk3oksbb@ti.com> <20201218105759.43789ccf@collabora.com> <31c395ee-d7a6-edc5-a790-89fad91a0a27@nvidia.com> <20201218191936.hb6sq7zr3zdirar7@ti.com> <20201218204102.GF5333@sirena.org.uk> <20201218204414.GG5333@sirena.org.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="tThc/1wpZn/ma/RB" Content-Disposition: inline In-Reply-To: X-Cookie: Remember: use logout to logout. User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --tThc/1wpZn/ma/RB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Dec 18, 2020 at 02:01:56PM -0800, Sowjanya Komatineni wrote: > From quick check, I see HW dummy cycles transfer of 128KB shows 18 Mb/s > while SW transfer of bytes shows 17.3 MB/s on average. OK, it's not going to revolutionize the world or anything but that's definitely a speedup. --tThc/1wpZn/ma/RB Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl/g0mkACgkQJNaLcl1U h9D/FggAgryOP3kQjSN2Lz4KeSPSrsKO6HHCcgeCbfox61nIVRcJVOBKpJX0nuU+ dbPP8gBvK3GNt/9J/WKP3k+LYD5NUfyq1lARlDe+WpU7P8VkE9TNpjctDFS2PiyO 6asDGI7iPahkE0iBmGAPqWyiUngS3X7PdN2/uuv4uSf7Fs45+f98se+GLKGa+ryK UUTJg3DPwqmMrFqArDETTmVj7/urqREQo/gYUHtQgc7H8KCOOquuXeeOYa5dres2 GEiFGR08bDJNX2nJ3xAHtLYRJw6DZnD421m5O+FG6pxNh8AfsHQTDnvEIq2TyA0O 3D+sPY0zkYYNDEnjixQtJ8ycT5Qgdw== =a44r -----END PGP SIGNATURE----- --tThc/1wpZn/ma/RB--