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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F77AC433F5 for ; Tue, 18 Jan 2022 08:33:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234753AbiARIdf (ORCPT ); Tue, 18 Jan 2022 03:33:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232184AbiARIdf (ORCPT ); Tue, 18 Jan 2022 03:33:35 -0500 Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02D69C061574; Tue, 18 Jan 2022 00:33:34 -0800 (PST) Received: by mail-lf1-x12f.google.com with SMTP id e3so64838697lfc.9; Tue, 18 Jan 2022 00:33:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version; bh=KLD+MloItQCMXbz2y5vOdZNej7yessFgYaQM/n3CvoM=; b=ne353ukwDghnGnW3HPOF/4PSgN+McoDbmkJm9FMzmrZDcFAD7EK2OapuoSm1g5mwfm I7RGL8DSO0iiq8skp4G3D8VJa+P5pdxQiHs25XFQ0gU70ulS8KccYJeOZG17GqXdSvnW tOC+ubr92jCsHTSnYA5KMEXVmlUlHHzkcV4qfD9TuJUiusF+FyMTgZFUZ8/RXbOVfeok XMDRgP3h+K/GxxW0pN+8nzDDQIQI3knLJVI31mXFW56MLkoQNlW7j9TUhEURlp7DwDzD uRYGhhczkt3Fyrb5VDWqbH+ng5lcEYDCgGzbR/tZQZJPYECC4L4pNmauVOrVioyu6h3N THkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version; bh=KLD+MloItQCMXbz2y5vOdZNej7yessFgYaQM/n3CvoM=; b=wOTCCf1CCMcPR9dWsv5bBG4zEKEC0pIuivuzF8ul6DK9p5Ox1jtH/M34zRhfBhk4w3 24q6zOPGguiRzYm2gHUVeyT9ntnjN/LcCVrDqzwxwRx0g0cGHHl516dgqAXLUB1xRMAE aAV/QRJeo3ziudHRlR7+9SVtHw0oagKpZmEnnNKxL+tdAYNFwMolhtXtT2mQnxgX95fW vv+fZi3DoZHYnY2f3VATm8XmdzpObm9gJ0C0RhqSD6smSGQOAZIf0ZOBIp/mhlZ+GYyn 2OH2H2B2Fhz0i7LV1LHDyf03kCrsZl2WKg18VKKAHDO9jx1idQSDDbdtjGHezIxqxQDN wYXA== X-Gm-Message-State: AOAM530N0VqjWbZZJTdhJq5S3RCXy5kRtErfMJymrYaATEOH0ZPR2VRH m41Hy57riOGn0dONagd1ydo= X-Google-Smtp-Source: ABdhPJzuSq/MUQlGIOzjU9G0ydbmSVmtEw8DKQdKcurbT9pZPqO7lteH/by5/VpQMde9PF0CTDn6ew== X-Received: by 2002:a05:6512:3249:: with SMTP id c9mr20011630lfr.355.1642494813232; Tue, 18 Jan 2022 00:33:33 -0800 (PST) Received: from eldfell ([194.136.85.206]) by smtp.gmail.com with ESMTPSA id e23sm1617601lfj.64.2022.01.18.00.33.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jan 2022 00:33:32 -0800 (PST) Date: Tue, 18 Jan 2022 10:33:23 +0200 From: Pekka Paalanen To: Sven Schnelle Cc: Thomas Zimmermann , Helge Deller , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] MAINTAINERS: Add Helge as fbdev maintainer Message-ID: <20220118103323.4bae3a7d@eldfell> In-Reply-To: <87bl0amc6s.fsf@x1.stackframe.org> References: <87bl0amc6s.fsf@x1.stackframe.org> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/pF3FTcxUDW+xdzSl3bV6P7H"; protocol="application/pgp-signature"; micalg=pgp-sha256 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org --Sig_/pF3FTcxUDW+xdzSl3bV6P7H Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 17 Jan 2022 19:47:39 +0100 Sven Schnelle wrote: > I also tested the speed on my Thinkpad X1 with Intel graphics, and there > a dmesg with 919 lines one the text console took about 2s to display. In > x11, i measure 22ms. This might be unfair because encoding might be > different, but i cannot confirm the 'memcpy' is faster than hardware > blitting' point. I think if that would be the case, no-one would care > about 2D acceleration. I think that is an extremely unfair comparison, because a graphical terminal app is not going to render every line of text streamed to it. It probably renders only the final view alone if you simply run 'dmesg', skipping the first 800-900 lines completely. Maybe fbcon should do the same when presented with a flood of text, but I don't know how or why it works like it works. I assume in your two second test you actually see some scrolling (animation) rather than the final view? Or does it take 2 seconds just to update one screenful? I doubt your fbcon and terminal window had height of 919 lines? 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