Received: (at 46350) by debbugs.gnu.org; 7 Feb 2021 19:05:02 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Feb 07 14:05:02 2021 Received: from localhost ([127.0.0.1]:48816 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8pMj-0006wU-RY for submit <at> debbugs.gnu.org; Sun, 07 Feb 2021 14:05:02 -0500 Received: from eggs.gnu.org ([209.51.188.92]:44824) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1l8pMi-0006vy-Ki for 46350 <at> debbugs.gnu.org; Sun, 07 Feb 2021 14:05:00 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:35439) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1l8pMd-00067p-4y; Sun, 07 Feb 2021 14:04:55 -0500 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:2186 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1l8pMb-00039F-1U; Sun, 07 Feb 2021 14:04:54 -0500 Date: Sun, 07 Feb 2021 21:05:05 +0200 Message-Id: <83a6sfn1ge.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Andrey Orst <andreyorst@HIDDEN> In-Reply-To: <CAAKhXoaxpm3H1pYEfaiYHoR1kHFWJ07i8KcrinE+e-1jQCi3yg@HIDDEN> (message from Andrey Orst on Sun, 7 Feb 2021 21:52:22 +0300) Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> <8335y9neut.fsf@HIDDEN> <CAAKhXoaQz3bpE7MZ8oXe-0rGVcRCVh=w52zjNnanh4UwzU_+qQ@HIDDEN> <83h7mnn4y6.fsf@HIDDEN> <CAAKhXoYcXnhs0EwTVA8BCyC6aFmb9nOW-qD3JQnzaSxXCUs=YA@HIDDEN> <83czxbn2dy.fsf@HIDDEN> <CAAKhXoaxpm3H1pYEfaiYHoR1kHFWJ07i8KcrinE+e-1jQCi3yg@HIDDEN> X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > From: Andrey Orst <andreyorst@HIDDEN> > Date: Sun, 7 Feb 2021 21:52:22 +0300 > Cc: 46350 <at> debbugs.gnu.org > > > There I was talking about progressive speed turned on, as it builds up > > almost instantly with my touchpad producing 30 inputs per swipe. > > Sorry, I don't understand: what builds up? > > Scrolling speed. With progressive speed turned on it is impossible to use touchpad because after single > swipe the speed builds up so much resulting in point immediately jumping to beginning/end of buffer. With such a rate of input events, isn't that expected?
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 7 Feb 2021 18:52:43 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Feb 07 13:52:43 2021 Received: from localhost ([127.0.0.1]:48786 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8pAo-0006cD-Km for submit <at> debbugs.gnu.org; Sun, 07 Feb 2021 13:52:43 -0500 Received: from mail-pg1-f170.google.com ([209.85.215.170]:46972) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <andreyorst@HIDDEN>) id 1l8pAl-0006by-GP for 46350 <at> debbugs.gnu.org; Sun, 07 Feb 2021 13:52:40 -0500 Received: by mail-pg1-f170.google.com with SMTP id r38so8793309pgk.13 for <46350 <at> debbugs.gnu.org>; Sun, 07 Feb 2021 10:52:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=g6EwQ006GnY3EDUrzfqgBevyJEW3zaEU0zE7H5z+v7M=; b=VEQINQOjRmZAXP8wWxKbbp6XMFoT9sCvcVX1DtTlz4wdBBtr98c4ZZ7xfSbFaoe+FL DJfm9hfiVpB2PMmdIycMCoNGC4MqECegcPFZt/sHD8TJCqPG69nYetWE5KskHkrQOWel DYx8Ez9WacfYOBjtekVAmOTb+HqTnwSqiaalPKOp0ad71p0Gjyd6VCnrpB+uByAmWj6g rcjn8/t0Du9ksv7tnZAsssifKcxib5r3Lz0+qXSYTN5d9zBhaaB6e7NdoS8YMleGXA7X gIeJ5wiPbXrR4n63vZXN/kvwt29dinXyi6hP5uV5bQaytHK/CQueUXt1XOcO5tJTG+xh 61Rg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=g6EwQ006GnY3EDUrzfqgBevyJEW3zaEU0zE7H5z+v7M=; b=CdH1PvfSphMBVrOgiQ8YT41PLHJagpihI2KUPZSsg7yzu/kDqnXBmBSUNs0kQ/zKB+ tTOEswl/XFCZHslsXy6bY5XBHepy4GsIeGlJrQJkZ33iwfDkXtIWGlRQlhDdD/12fnNU /o9/tNewsc7JKP3KEieqrVOe8OcN7sLM/4P1gJdUz4mfHzWEJ7OnjHCWwmp30YAiXVBs OCfdIUFppS+Ie29ImuNQ+Z/EhK5wqsGmB7zZOXIp/KKZE2JwxQY/zMV/od833Jm9sDty bd/VtJAZsKdjaAsVo+/4IOLaxvWC58XS+TXyb2zLMOEVjy82/oe8N+t6l2wZjgkAVE/D 8C4g== X-Gm-Message-State: AOAM531KcraaX3SP+9mCgolBTZXjr1KkO2noYyhodeIsgqAY6F8YQdpq wse9EEnivPw03JuTE0Cz0UdozQUKuLK6uD9xjZ4= X-Google-Smtp-Source: ABdhPJwfxEpI+Fmru9aQTSEFDK5WoejDrW6ckuKoml4oOTs63S6JCMJnXBL/Fi6q3Ye9GD3TJhr6f7vd1+pbt/wGvz4= X-Received: by 2002:a63:551f:: with SMTP id j31mr13937325pgb.432.1612723953564; Sun, 07 Feb 2021 10:52:33 -0800 (PST) MIME-Version: 1.0 References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> <8335y9neut.fsf@HIDDEN> <CAAKhXoaQz3bpE7MZ8oXe-0rGVcRCVh=w52zjNnanh4UwzU_+qQ@HIDDEN> <83h7mnn4y6.fsf@HIDDEN> <CAAKhXoYcXnhs0EwTVA8BCyC6aFmb9nOW-qD3JQnzaSxXCUs=YA@HIDDEN> <83czxbn2dy.fsf@HIDDEN> In-Reply-To: <83czxbn2dy.fsf@HIDDEN> From: Andrey Orst <andreyorst@HIDDEN> Date: Sun, 7 Feb 2021 21:52:22 +0300 Message-ID: <CAAKhXoaxpm3H1pYEfaiYHoR1kHFWJ07i8KcrinE+e-1jQCi3yg@HIDDEN> Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples To: Eli Zaretskii <eliz@HIDDEN> Content-Type: multipart/alternative; boundary="0000000000005f800405bac38e60" X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) --0000000000005f800405bac38e60 Content-Type: text/plain; charset="UTF-8" > > I didn't ask how much time it takes Emacs to process the inputs. I > asked how much time did it take you to generate them by moving your > finger on the touchpad. I very much doubt the answer to that is 15 > sec. > Yes I was talking about me inputting scrolling events for about ~15 secs. I've rewatched the video and I'm continuously swiping over touchpad for about ~10 seconds, and Emacs updates position ~5 seconds after I stopped. > There I was talking about progressive speed turned on, as it builds up > > almost instantly with my touchpad producing 30 inputs per swipe. > > Sorry, I don't understand: what builds up? > Scrolling speed. With progressive speed turned on it is impossible to use touchpad because after single swipe the speed builds up so much resulting in point immediately jumping to beginning/end of buffer. > --0000000000005f800405bac38e60 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"auto"><div><div class=3D"gmail_quote"><blockquote class=3D"gmai= l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left= :1ex">I didn't ask how much time it takes Emacs to process the inputs.= =C2=A0 I<br> asked how much time did it take you to generate them by moving your<br> finger on the touchpad.=C2=A0 I very much doubt the answer to that is 15<br= > sec.<br></blockquote></div></div><div dir=3D"auto"><br></div><div dir=3D"au= to">Yes I was talking about me inputting scrolling events for about ~15 sec= s. I've rewatched the video and I'm continuously swiping over touch= pad for about ~10 seconds, and Emacs updates position ~5 seconds after I st= opped.</div><div dir=3D"auto"><br></div><div dir=3D"auto"><div class=3D"gma= il_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord= er-left:1px #ccc solid;padding-left:1ex">> There I was talking about pro= gressive speed turned on, as it builds up<br> > almost instantly with my touchpad producing 30 inputs per swipe.<br> <br> Sorry, I don't understand: what builds up?<br></blockquote></div></div>= <div dir=3D"auto"><br></div><div dir=3D"auto">Scrolling speed. With progres= sive speed turned on it is impossible to use touchpad because after single = swipe the speed builds up so much resulting in point immediately jumping to= beginning/end of buffer.</div><div dir=3D"auto"><div class=3D"gmail_quote"= ><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1= px #ccc solid;padding-left:1ex"> </blockquote></div></div></div> --0000000000005f800405bac38e60--
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 7 Feb 2021 18:44:57 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Feb 07 13:44:57 2021 Received: from localhost ([127.0.0.1]:48781 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8p3I-0004KC-Pq for submit <at> debbugs.gnu.org; Sun, 07 Feb 2021 13:44:57 -0500 Received: from eggs.gnu.org ([209.51.188.92]:40910) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1l8p3F-0004Jz-UN for 46350 <at> debbugs.gnu.org; Sun, 07 Feb 2021 13:44:55 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:34909) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1l8p3A-00056U-Ma; Sun, 07 Feb 2021 13:44:48 -0500 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4922 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1l8p39-0000xJ-QB; Sun, 07 Feb 2021 13:44:48 -0500 Date: Sun, 07 Feb 2021 20:44:57 +0200 Message-Id: <83czxbn2dy.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Andrey Orst <andreyorst@HIDDEN> In-Reply-To: <CAAKhXoYcXnhs0EwTVA8BCyC6aFmb9nOW-qD3JQnzaSxXCUs=YA@HIDDEN> (message from Andrey Orst on Sun, 7 Feb 2021 21:33:25 +0300) Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> <8335y9neut.fsf@HIDDEN> <CAAKhXoaQz3bpE7MZ8oXe-0rGVcRCVh=w52zjNnanh4UwzU_+qQ@HIDDEN> <83h7mnn4y6.fsf@HIDDEN> <CAAKhXoYcXnhs0EwTVA8BCyC6aFmb9nOW-qD3JQnzaSxXCUs=YA@HIDDEN> X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > From: Andrey Orst <andreyorst@HIDDEN> > Date: Sun, 7 Feb 2021 21:33:25 +0300 > Cc: 46350 <at> debbugs.gnu.org > > On Sun, Feb 7, 2021 at 8:49 PM Eli Zaretskii <eliz@HIDDEN> wrote: > > 1350 calls during what time, approximately? less than a second? > > If you've watched the video I've linked I cannot watch that video, sorry. But I don't think it matters, see below. > you can get a sense of what > time it takes -- about 15 seconds. Or more if I continue swyping > rapidly, since Emacs just sits at the bottom eating all input until I > stop. I didn't ask how much time it takes Emacs to process the inputs. I asked how much time did it take you to generate them by moving your finger on the touchpad. I very much doubt the answer to that is 15 sec. > Touchpad generates about 20-30 inputs per swipe, so I think ~90 inputs > is maximum human can produce in 1 second ~100 1-line scrolls per second is also a lot, for what Emacs must do to scroll. > Can Emacs poll mouse events less frequently? Emacs doesn't poll the mouse. The mouse events are received from the X event queue, together with all the other events: keyboard input, expose events, etc. We read the events from X and then process them one by one. > > So, once we've established that the touchpad injects 1-line scroll > > requests at such a high rate, what else needs to be investigated here? > > There I was talking about progressive speed turned on, as it builds up > almost instantly with my touchpad producing 30 inputs per swipe. Sorry, I don't understand: what builds up?
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 7 Feb 2021 18:33:45 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Feb 07 13:33:45 2021 Received: from localhost ([127.0.0.1]:48747 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8osT-00041W-Aa for submit <at> debbugs.gnu.org; Sun, 07 Feb 2021 13:33:45 -0500 Received: from mail-pl1-f172.google.com ([209.85.214.172]:34075) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <andreyorst@HIDDEN>) id 1l8osQ-00041I-Vx for 46350 <at> debbugs.gnu.org; Sun, 07 Feb 2021 13:33:44 -0500 Received: by mail-pl1-f172.google.com with SMTP id u15so6653621plf.1 for <46350 <at> debbugs.gnu.org>; Sun, 07 Feb 2021 10:33:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=1mEc/0bwknwJhqOuDTEi1uubS+UN1YfPrrHVEF1PP1E=; b=va4k0Tmq4hoyDfqHwH1IZIFEM0UAlxIfPYj8tL8xd5knDcvGQMZ5Vu7V3RI8cIY+fI lOLSe3k1dha6Z344OcG9GRdRGZTpbXNPOlfA7A0ZKmCJC4P3s8C0ihyWgZqmdcnGkd6M 7X60iVw+/us/bhkSmoo8bZPjjB+oKPb2xH8dq25tEa3wSSSFwq9JhaxS/pc+iG/u0AVD 2tCNH/29SSbcwaVD7NI63szCBgMwUE7j/VkpSC8Izu2ziPLXlTAUEeAGPl4dt/piZCOO szcIDiB3xxy25ZsD5xgdXUwnn3csqSJrHaavZ36O0Qkv68LlDZKqxg02c/myzOSKbshg Lwbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=1mEc/0bwknwJhqOuDTEi1uubS+UN1YfPrrHVEF1PP1E=; b=hD+GN65fkMqkN5RfDFW3VEYJFBuiCzwmoaJR0fTPgKHwbjH3SVNKx1D/e3YV1Kukxy ZoimoaZUnKuhjMiDLORJjCz8eaZGMZPNUsoIgCKtc0RDtUUMMb1FA9z4PkXkvZEX8D6S vou//s60wSo7tSDJ9EIDYgKfVDt/FFAjB9jefpyIInuaSThs91xgqnM6PZAQBmO9Ina+ 0pzW/natBlzWgdQ4dqGFRmtaZqMAwwTfFGz/RyW3kVpoehoTeGtRNm8vNDIlct9eWHaW 612UhhY63z2O1N3rAIjuoEz/nivkBLv1HLA/DT6ORxMl9iSRqiPdsEiFIa64CT5afTtb juRQ== X-Gm-Message-State: AOAM530rf5ARuf//NWRWnCsDYntFiI4faDJT/LUIB4TWOSTMdern48SA t/t6keED4+3hdXaL2bWDrFFrce7KlO3oC8cg3TM= X-Google-Smtp-Source: ABdhPJxJcHCYCg/tUJCes3AHAsDep+1yE2zhCr1Ye4tHZbRFaVDITK79nb6KQCJcMAzLaA7KzH2MBu+U+k2TOrDtF5g= X-Received: by 2002:a17:90a:4092:: with SMTP id l18mr4408493pjg.1.1612722816972; Sun, 07 Feb 2021 10:33:36 -0800 (PST) MIME-Version: 1.0 References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> <8335y9neut.fsf@HIDDEN> <CAAKhXoaQz3bpE7MZ8oXe-0rGVcRCVh=w52zjNnanh4UwzU_+qQ@HIDDEN> <83h7mnn4y6.fsf@HIDDEN> In-Reply-To: <83h7mnn4y6.fsf@HIDDEN> From: Andrey Orst <andreyorst@HIDDEN> Date: Sun, 7 Feb 2021 21:33:25 +0300 Message-ID: <CAAKhXoYcXnhs0EwTVA8BCyC6aFmb9nOW-qD3JQnzaSxXCUs=YA@HIDDEN> Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples To: Eli Zaretskii <eliz@HIDDEN> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On Sun, Feb 7, 2021 at 8:49 PM Eli Zaretskii <eliz@HIDDEN> wrote: > 1350 calls during what time, approximately? less than a second? If you've watched the video I've linked you can get a sense of what time it takes -- about 15 seconds. Or more if I continue swyping rapidly, since Emacs just sits at the bottom eating all input until I stop. Touchpad generates about 20-30 inputs per swipe, so I think ~90 inputs is maximum human can produce in 1 second > I don't think Emacs can scroll so fast, one line at a time. Note that > when you scroll with the scroll-bar, Emacs doesn't call > scroll-up/down, it just goes to a suitably calculated buffer position. > Which is why scroll-bar scrolling is much faster. But I don't see how > we can do something similar with the mouse-wheel, since it doesn't > allow to calculate the buffer position to go to; Emacs needs to do > that calculation itself, and that what makes the scrolling so much > slower. Can Emacs poll mouse events less frequently? Maybe some libinput stuff needs tweaking? > > > What is the size of the buffer that it scrolls almost instantly to > > > BOB? How many lines? > > > > 1405 lines. I'm testing this on bundled lisp-mode.el > > Which explains why it scrolls in one go: 1405 =E2=89=85 1350. > > So, once we've established that the touchpad injects 1-line scroll > requests at such a high rate, what else needs to be investigated here? There I was talking about progressive speed turned on, as it builds up almost instantly with my touchpad producing 30 inputs per swipe. --=20 Best regards, Andrey Listopadov
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 7 Feb 2021 17:49:35 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Feb 07 12:49:35 2021 Received: from localhost ([127.0.0.1]:48672 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8oBj-00078N-FK for submit <at> debbugs.gnu.org; Sun, 07 Feb 2021 12:49:35 -0500 Received: from eggs.gnu.org ([209.51.188.92]:58680) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1l8oBh-00078B-B6 for 46350 <at> debbugs.gnu.org; Sun, 07 Feb 2021 12:49:34 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:33770) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1l8oBc-0005bf-2x; Sun, 07 Feb 2021 12:49:28 -0500 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1341 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1l8oBb-0002Py-6I; Sun, 07 Feb 2021 12:49:27 -0500 Date: Sun, 07 Feb 2021 19:49:37 +0200 Message-Id: <83h7mnn4y6.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Andrey Orst <andreyorst@HIDDEN> In-Reply-To: <CAAKhXoaQz3bpE7MZ8oXe-0rGVcRCVh=w52zjNnanh4UwzU_+qQ@HIDDEN> (message from Andrey Orst on Sun, 7 Feb 2021 20:23:09 +0300) Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> <8335y9neut.fsf@HIDDEN> <CAAKhXoaQz3bpE7MZ8oXe-0rGVcRCVh=w52zjNnanh4UwzU_+qQ@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > From: Andrey Orst <andreyorst@HIDDEN> > Date: Sun, 7 Feb 2021 20:23:09 +0300 > Cc: 46350 <at> debbugs.gnu.org > > > Add a call to 'message' to mwheel-scroll, and have it show a counter > > that counts up? > > I've did as you've suggested. When scrolling buffer of 1405 lines from > bottom to the top (while emacs is unresponsive) mwheel-scroll function > seems to be called about ~1351 times. Single fast flick over touchpad > produces ~40 calls to mwheel-scroll. 1350 calls during what time, approximately? less than a second? I don't think Emacs can scroll so fast, one line at a time. Note that when you scroll with the scroll-bar, Emacs doesn't call scroll-up/down, it just goes to a suitably calculated buffer position. Which is why scroll-bar scrolling is much faster. But I don't see how we can do something similar with the mouse-wheel, since it doesn't allow to calculate the buffer position to go to; Emacs needs to do that calculation itself, and that what makes the scrolling so much slower. > > What is the size of the buffer that it scrolls almost instantly to > > BOB? How many lines? > > 1405 lines. I'm testing this on bundled lisp-mode.el Which explains why it scrolls in one go: 1405 ≅ 1350. So, once we've established that the touchpad injects 1-line scroll requests at such a high rate, what else needs to be investigated here?
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 7 Feb 2021 17:23:31 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Feb 07 12:23:31 2021 Received: from localhost ([127.0.0.1]:48655 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8nmU-0006WI-97 for submit <at> debbugs.gnu.org; Sun, 07 Feb 2021 12:23:31 -0500 Received: from mail-pl1-f171.google.com ([209.85.214.171]:40899) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <andreyorst@HIDDEN>) id 1l8nmR-0006W2-7K for 46350 <at> debbugs.gnu.org; Sun, 07 Feb 2021 12:23:29 -0500 Received: by mail-pl1-f171.google.com with SMTP id y10so6575479plk.7 for <46350 <at> debbugs.gnu.org>; Sun, 07 Feb 2021 09:23:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Ib1w5if+RvHMe/qTxJR6ZJZ4zPNqiaWflhhnGceujhA=; b=UkApLDhqwuHoOT76VnV8s+znlLbh3++hlgx3OV2dR7R92cDJEkBjzouDVjW1Qb45dM suTmwJzqyRZVgnrm4So/dkN3uONQPklnDVIl12/7Q7SqKFXEkgUOHxNWVGtJUhPYPPET ti3lMPa+L1MezOW2DXUPknLvsnB2hKeQAdmQncn32stNbuRumin4c2ZJdNkaVuV2ZPGI DBCg0kRO0DozIKVMF19ONX5+/PA83WR0Z318XaApdxLyz2W15pkot0TTF79xJAQQQ5Y1 D40EWv2nJRebHvuV/VTxTSMQg9RCv0KSW88H5YRTn9stTFlmXrzet9lLhifXpBmbsdVZ QBwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Ib1w5if+RvHMe/qTxJR6ZJZ4zPNqiaWflhhnGceujhA=; b=C2KaHk2Athr20Qvm+TnxtrPeEP7nl/bEuW9OiVT+v64WATQX4nnCIoYOznOTaqtZz/ QT8zxC2bL8IqOSwwXx7lx4Jc2wnCy+C/+ctJkl/Kv4nNToVsKQGO8tz9amDU+C+m2OS8 0dRHZYnGowN1cDvJsxk/xapwJ2S60E3m4N1vMJLB9PaK/M/U8gNXbIjZaSTYoWNxO/jR rK7R0IgKJK/wPIYVx4sqBsTyABZioimY+HHmPgn+hEDm5AjKrVL5p/WP2mUKsz71E39D 1/wlGHOCLK3bH51Hus8oqOqun2YLfT9Dhen2FeGMceQ1oiT5JYMFJRf/o/0z9p0A4cL2 Ys7Q== X-Gm-Message-State: AOAM533t9Nk54Ix5pwtZ5Bb3qP1e4xgFssOhTEBelcvOyi1QK1F/Gf/D MfnUfHAZJdpjCzwXM3vNcdIHE6PJkHNLqtD4hiw= X-Google-Smtp-Source: ABdhPJz5Y61yCDLRCVGWyAzEQzNPqYq+FjzxsvJ0EJYuVJrJ4hyclLzFRFZ6rHA3pE0RP56XRN7FyiPy4hYVybHcizQ= X-Received: by 2002:a17:90a:db12:: with SMTP id g18mr13448685pjv.72.1612718601272; Sun, 07 Feb 2021 09:23:21 -0800 (PST) MIME-Version: 1.0 References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> <8335y9neut.fsf@HIDDEN> In-Reply-To: <8335y9neut.fsf@HIDDEN> From: Andrey Orst <andreyorst@HIDDEN> Date: Sun, 7 Feb 2021 20:23:09 +0300 Message-ID: <CAAKhXoaQz3bpE7MZ8oXe-0rGVcRCVh=w52zjNnanh4UwzU_+qQ@HIDDEN> Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples To: Eli Zaretskii <eliz@HIDDEN> Content-Type: text/plain; charset="UTF-8" X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On Sat, Feb 6, 2021 at 11:03 PM Eli Zaretskii <eliz@HIDDEN> wrote: > > > And how many mouse-wheel events Emacs receives in your > > scenario, anyway? > > > > Sorry, how can I check that? > > Add a call to 'message' to mwheel-scroll, and have it show a counter > that counts up? I've did as you've suggested. When scrolling buffer of 1405 lines from bottom to the top (while emacs is unresponsive) mwheel-scroll function seems to be called about ~1351 times. Single fast flick over touchpad produces ~40 calls to mwheel-scroll. Adding (sit-for 0) at the start of the function doesn't have any effect. > What is the size of the buffer that it scrolls almost instantly to > BOB? How many lines? 1405 lines. I'm testing this on bundled lisp-mode.el -- Best regards, Andrey Listopadov
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 6 Feb 2021 20:03:26 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 06 15:03:26 2021 Received: from localhost ([127.0.0.1]:46496 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8Tni-0006AN-Gx for submit <at> debbugs.gnu.org; Sat, 06 Feb 2021 15:03:26 -0500 Received: from eggs.gnu.org ([209.51.188.92]:46718) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1l8Tng-0006AB-To for 46350 <at> debbugs.gnu.org; Sat, 06 Feb 2021 15:03:25 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:45412) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1l8Tna-0002Fq-EJ; Sat, 06 Feb 2021 15:03:19 -0500 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4321 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1l8TnU-0000V6-8K; Sat, 06 Feb 2021 15:03:14 -0500 Date: Sat, 06 Feb 2021 22:03:22 +0200 Message-Id: <8335y9neut.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Andrey Orst <andreyorst@HIDDEN> In-Reply-To: <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> (message from Andrey Orst on Sat, 6 Feb 2021 22:47:55 +0300) Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > From: Andrey Orst <andreyorst@HIDDEN> > Date: Sat, 6 Feb 2021 22:47:55 +0300 > Cc: 46350 <at> debbugs.gnu.org > > And how many mouse-wheel events Emacs receives in your > scenario, anyway? > > Sorry, how can I check that? Add a call to 'message' to mwheel-scroll, and have it show a counter that counts up?
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 6 Feb 2021 19:48:14 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 06 14:48:14 2021 Received: from localhost ([127.0.0.1]:46472 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8TYz-0005lk-TQ for submit <at> debbugs.gnu.org; Sat, 06 Feb 2021 14:48:14 -0500 Received: from mail-pj1-f45.google.com ([209.85.216.45]:55808) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <andreyorst@HIDDEN>) id 1l8TYy-0005lW-Q2 for 46350 <at> debbugs.gnu.org; Sat, 06 Feb 2021 14:48:13 -0500 Received: by mail-pj1-f45.google.com with SMTP id s24so5423662pjp.5 for <46350 <at> debbugs.gnu.org>; Sat, 06 Feb 2021 11:48:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=XLjZRgqKVaQKFbtlkWpuHJQGu2tMiX0zoFCRW96ee+Q=; b=vhj/kZwsubO/thXNEl30NDn7G0h16wLTzvhdMwesQ7tV0tFuSoohASyfnk72sZndAZ Z2WXuX6Sndgmty5Rf+kc0J8zHefI7+R8ufReDj0HOg933NCBvNjiI7OjPeDsfWGzDN6K jCVXWU09jrI61Sv0RPxJyXVT5Ao1wXFH9HFenR2KTk5zTX+ViUQUiRiBUegngdao0op6 bPgVa26ckkJojYHQJBG2+3x6PnZ8GR7sW56pKnlISUWgdxgHGsYml0pFu0HTasJ3UC24 MOEmJ2jU4ff8DsKmp63+Ca8P2zuPdCRbmqhIdLaXAst3BOvfoBJtIqkp7t9jWw2n2ry2 hq4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=XLjZRgqKVaQKFbtlkWpuHJQGu2tMiX0zoFCRW96ee+Q=; b=kOEupsrx6Fw2FM1goRWBdn/0T3Teedo0LBU4PlfeQB3uUf7KKCqtUUHJOlAnkXuBaa 7P5GwnUFCwN+M3pJodSAqIGs6HZcPgwarpqBgJwXMCIhgMpWZZYj+nYoy8XXMBVLiSgN 5WtwxeVw8XeArTMLuPce1BCF9ePJTXoukutlEOTOo0Qta86ry7yt5QGf4P9Gj3xisYxZ rnFsQmN90wFOE6apC4zHTsLHr6oXX8AbKgrjiwg10An96l9dmkAX9c690KnlGdKR1fnP JcL7W9HZpGHLc+huDxMEiUIYns8IuMFoQZEWFQPXLlv9TWSEuPFpOqVojqxZbcoD2KVi W7cw== X-Gm-Message-State: AOAM531HCPfhL0ZMp4CqWgXwwF0Wta36bWCV2wIeIFrsNInD5Ux6mS3o 6XQ4a3iXPeXQhrmEfYY6oo3t0ejdniZGuEfsGn0= X-Google-Smtp-Source: ABdhPJyPnFH6tXRbSmB2i9esdQGsF22Tjp8mhrcczJU/kXmTxd3mxQixRmNyGksNxZXT588ktb5O+LmKuRlkWz/OiN0= X-Received: by 2002:a17:902:a60b:b029:df:ec2e:6a1d with SMTP id u11-20020a170902a60bb02900dfec2e6a1dmr9689124plq.27.1612640887091; Sat, 06 Feb 2021 11:48:07 -0800 (PST) MIME-Version: 1.0 References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <838s81nhoz.fsf@HIDDEN> In-Reply-To: <838s81nhoz.fsf@HIDDEN> From: Andrey Orst <andreyorst@HIDDEN> Date: Sat, 6 Feb 2021 22:47:55 +0300 Message-ID: <CAAKhXobsjNokSNLo5GeJoFW+9WPkiAH5vw1nKrk3O8LSsZbtdw@HIDDEN> Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples To: Eli Zaretskii <eliz@HIDDEN> Content-Type: multipart/alternative; boundary="00000000000039b52505bab037b3" X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) --00000000000039b52505bab037b3 Content-Type: text/plain; charset="UTF-8" > > Do you use a large frame and/or a small > font? In fact, yes, my screen is 2K, and system font scaling is set to 1.44, but this also happens on regular 1080p screen with regularly sized font. And how many mouse-wheel events Emacs receives in your > scenario, anyway? > Sorry, how can I check that? I do think that Emacs actually receives a metric ton of events, as scolling with mouse seems hardly lag at all, and scrolling in termux with touch events also not as laggy. Oh, and what happens if you raise gc-cons-threshold to a large value? > No difference. Note, that scrolling with scrollbars has no lag at all, so I don't think that GC is relevant here. I've also noticed that scrollin with scrollbar has (sit-for 0) in the body of the scroll function, and IIRC mwheel-scroll doesnt sit at all. maybe because of that it consumes too many inputs? I wonder if you could send tons of scrolling inputs via xdotool or smth like that on Linux? > --00000000000039b52505bab037b3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"auto"><div><div class=3D"gmail_quote"><blockquote class=3D"gmai= l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left= :1ex">Do you use a large frame and/or a small<br> font?=C2=A0</blockquote></div></div><div dir=3D"auto"><br></div><div dir=3D= "auto">In fact, yes, my screen is 2K, and system font scaling is set to 1.4= 4, but this also happens on regular 1080p screen with regularly sized font.= </div><div dir=3D"auto"><br></div><div dir=3D"auto"></div><div dir=3D"auto"= ><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"marg= in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> </blockquote></= div></div><div dir=3D"auto"><div class=3D"gmail_quote"><blockquote class=3D= "gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding= -left:1ex"></blockquote></div></div><div dir=3D"auto"><div class=3D"gmail_q= uote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-l= eft:1px #ccc solid;padding-left:1ex"></blockquote></div></div><div dir=3D"a= uto"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"= margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"></blockquote= ></div></div><div dir=3D"auto"><div class=3D"gmail_quote"><blockquote class= =3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd= ing-left:1ex"></blockquote></div></div><div dir=3D"auto"><div class=3D"gmai= l_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;borde= r-left:1px #ccc solid;padding-left:1ex"></blockquote></div></div><div dir= =3D"auto"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" styl= e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"></block= quote></div></div><div dir=3D"auto"><div class=3D"gmail_quote"><blockquote = class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid= ;padding-left:1ex">And how many mouse-wheel events Emacs receives in your<b= r> scenario, anyway?<br></blockquote></div></div><div dir=3D"auto"><br></div><= div dir=3D"auto">Sorry, how can I check that? I do think that Emacs actuall= y receives a metric ton of events, as scolling with mouse seems hardly lag = at all, and scrolling in termux with touch events also not as laggy.=C2=A0<= /div><div dir=3D"auto"><br></div><div dir=3D"auto"><div class=3D"gmail_quot= e"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left= :1px #ccc solid;padding-left:1ex">Oh, and what happens if you raise gc-cons= -threshold to a large value?<br></blockquote></div></div><div dir=3D"auto">= <br></div><div dir=3D"auto">No difference. Note, that scrolling with scroll= bars has no lag at all, so I don't think that GC is relevant here.=C2= =A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">I've also notice= d that scrollin with scrollbar has (sit-for 0) in the body of the scroll fu= nction, and IIRC mwheel-scroll doesnt sit at all. maybe because of that it = consumes too many inputs?</div><div dir=3D"auto"><br></div><div dir=3D"auto= ">I wonder if you could send tons of scrolling inputs via xdotool or smth l= ike that on Linux?</div><div dir=3D"auto"><div class=3D"gmail_quote"><block= quote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc= solid;padding-left:1ex"> </blockquote></div></div></div> --00000000000039b52505bab037b3--
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 6 Feb 2021 19:05:58 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 06 14:05:58 2021 Received: from localhost ([127.0.0.1]:46457 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8Su5-0004lM-QA for submit <at> debbugs.gnu.org; Sat, 06 Feb 2021 14:05:58 -0500 Received: from eggs.gnu.org ([209.51.188.92]:39746) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1l8Su3-0004l8-96 for 46350 <at> debbugs.gnu.org; Sat, 06 Feb 2021 14:05:56 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:44390) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1l8Stx-0001UD-Oz; Sat, 06 Feb 2021 14:05:50 -0500 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4731 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1l8StM-0004Yl-2L; Sat, 06 Feb 2021 14:05:40 -0500 Date: Sat, 06 Feb 2021 21:05:17 +0200 Message-Id: <837dnlnhjm.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Andrey Orst <andreyorst@HIDDEN> In-Reply-To: <CAAKhXoaEhB_a4dkYur6-=wn=gHOao=7_QTS2xkweWH6SRypC3g@HIDDEN> (message from Andrey Orst on Sat, 6 Feb 2021 21:55:58 +0300) Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> <CAAKhXoaEhB_a4dkYur6-=wn=gHOao=7_QTS2xkweWH6SRypC3g@HIDDEN> X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > From: Andrey Orst <andreyorst@HIDDEN> > Date: Sat, 6 Feb 2021 21:55:58 +0300 > Cc: 46350 <at> debbugs.gnu.org > > I should mention again, that I'm setting > `mouse-wheel-progressive-speed' to `nil' after I'm opening emacs -Q. Yes, I tried that. I don't see anything abnormal except the slower scrolling (which is expected without the progressive-speed setting). > Without this setting the lag still there, but it is a bit harder to > capture it in -Q mode, as buffer scrolls to upper boundary almost > instantly with that much speed produced by toucpad. What is the size of the buffer that it scrolls almost instantly to BOB? How many lines?
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 6 Feb 2021 19:02:09 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 06 14:02:09 2021 Received: from localhost ([127.0.0.1]:46441 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8SqO-0004fV-My for submit <at> debbugs.gnu.org; Sat, 06 Feb 2021 14:02:08 -0500 Received: from eggs.gnu.org ([209.51.188.92]:39274) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1l8SqM-0004f5-Tg for 46350 <at> debbugs.gnu.org; Sat, 06 Feb 2021 14:02:07 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:44347) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1l8SqH-0008MN-MQ; Sat, 06 Feb 2021 14:02:01 -0500 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4536 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1l8SqG-0002ht-NE; Sat, 06 Feb 2021 14:02:01 -0500 Date: Sat, 06 Feb 2021 21:02:04 +0200 Message-Id: <838s81nhoz.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Andrey Orst <andreyorst@HIDDEN> In-Reply-To: <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> (message from Andrey Orst on Sat, 6 Feb 2021 21:34:29 +0300) Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> <83a6shnklg.fsf@HIDDEN> <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN> X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > From: Andrey Orst <andreyorst@HIDDEN> > Date: Sat, 6 Feb 2021 21:34:29 +0300 > Cc: 46350 <at> debbugs.gnu.org > > > Please load mwheel.el (NOT the .elc file!), and then profile the slow > > scrolling again and show a fully-expanded profile. That might help us > > understand what part of mwheel-scroll takes the lion's share of CPU > > cycles. > > Here's whole report expanded (btw can't find if there's expand-all feature?): Yes, "C-u RET". > 11593 91% - command-execute > 11549 91% - funcall-interactively > 11542 91% - mwheel-scroll > 11536 91% - let* > 11420 90% - condition-case > 11381 90% - unwind-protect > 11377 90% - let > 11373 90% - cond > 11372 90% - condition-case > 10868 86% - funcall > 324 2% - scroll-down > 263 2% - jit-lock-function > 255 2% - jit-lock-fontify-now > 235 1% - jit-lock--run-functions I cannot make sense out of this: this profile says that funcall takes most of the time, and the function it calls, scroll-down, takes almost no time? Does anyone have any idea what could be going on here? If this is just some artifact of "M-x profile", and most of the time is spent in scroll-down, then I'm not sure what can be done, nor why you see something I don't. Do you use a large frame and/or a small font? And how many mouse-wheel events Emacs receives in your scenario, anyway? Oh, and what happens if you raise gc-cons-threshold to a large value?
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
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bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
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<83a6shnklg.fsf@HIDDEN>
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From: Andrey Orst <andreyorst@HIDDEN>
Date: Sat, 6 Feb 2021 21:34:29 +0300
Message-ID: <CAAKhXoa80U+R3nDcvBzJxyy_CLRyczMWKUYCTVWxF-skg+om4Q@HIDDEN>
Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples
To: Eli Zaretskii <eliz@HIDDEN>
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On Sat, Feb 6, 2021 at 8:59 PM Eli Zaretskii <eliz@HIDDEN> wrote:
> I cannot reproduce this. Did you try "emacs -Q"?
Yes, the behavior I've described happens to me in emacs -Q (and emacs -q)
> Please load mwheel.el (NOT the .elc file!), and then profile the slow
> scrolling again and show a fully-expanded profile. That might help us
> understand what part of mwheel-scroll takes the lion's share of CPU
> cycles.
Here's whole report expanded (btw can't find if there's expand-all
feature?):
11593 91% - command-execute
11549 91% - funcall-interactively
11542 91% - mwheel-scroll
11536 91% - let*
11420 90% - condition-case
11381 90% - unwind-protect
11377 90% - let
11373 90% - cond
11372 90% - condition-case
10868 86% - funcall
324 2% - scroll-down
263 2% - jit-lock-function
255 2% - jit-lock-fontify-now
235 1% - jit-lock--run-functions
233 1% - #<compiled -0x152f649d2893cb7b>
232 1% - font-lock-fontify-region
224 1% - font-lock-default-fontify-region
132 1% - font-lock-fontify-syntactically-region
110 0% syntax-ppss
10 0% - lisp-font-lock-syntactic-face-function
7 0% - lisp-string-in-doc-position-p
1 0% forward-sexp
2 0% - lisp-string-after-doc-keyword-p
2 0% - backward-sexp
2 0% forward-sexp
35 0% - font-lock-fontify-keywords-region
17 0% - lisp--el-match-keyword
2 0% - lisp--el-non-funcall-position-p
1 0% syntax-ppss
5 0% #<compiled -0x4e6368f210a40dc>
1 0% - let
1 0% - cond
1 0% eq
1 0% font-lock-prepend-text-property
1 0%
lisp--match-confusable-symbol-character
6 0% font-lock-unfontify-region
24 0% - eval
18 0% - if
3 0% display-graphic-p
2 0% - unless
1 0% if
1 0% mode-line-eol-desc
502 3% - unwind-protect
502 3% - funcall
5 0% - scroll-down
4 0% - eval
4 0% if
4 0% - if
2 0% if
6 0% - message
4 0% - error-message-string
3 0% - substitute-command-keys
1 0% #<compiled -0x1fc73df3077c5a73>
1 0% clear-minibuffer-message
57 0% - if
50 0% - progn
46 0% - setq
39 0% - run-with-timer
33 0% - run-at-time
4 0% - timer-set-time
1 0% timer--time-setter
1 0% timer-activate
3 0% *
2 0% if
3 0% - let
2 0% - while
1 0% - consp
1 0% - setq
1 0% car-safe
49 0% - mouse-wheel--get-scroll-window
48 0% - or
47 0% - catch
45 0% - let*
44 0% - if
39 0% progn
4 0% mwheel-event-window
1 0% - delq
1 0% - delq
1 0% delq
5 0% - eval-expression
5 0% progn
42 0% - byte-code
29 0% - read--expression
2 0% - redisplay_internal (C function)
2 0% - funcall
2 0% - #<compiled 0x4f9dac7e18824a>
2 0% - gui-backend-selection-exists-p
2 0% - apply
2 0% #<compiled -0x16887ad6f3ef152d>
1 0% - frame-windows-min-size
1 0% window-min-size
976 7% - ...
976 7% Automatic GC
13 0% - timer-event-handler
13 0% - apply
13 0% - #<subr
F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_11>
13 0% - eldoc-print-current-symbol-info
13 0% - eldoc--invoke-strategy
13 0% - eldoc-documentation-default
13 0% - elisp-eldoc-funcall
13 0% - elisp--fnsym-in-current-sexp
13 0% - elisp--beginning-of-sexp
13 0% - forward-sexp
4 0% - scan-sexps
4 0% syntax-ppss
11 0% - jit-lock--antiblink-post-command
11 0% syntax-ppss
5 0% - undo-auto--add-boundary
4 0% - undo-auto--boundaries
2 0% undo-auto--ensure-boundary
3 0% - mwheel-filter-click-events
2 0% - if
2 0% eq
3 0% internal-timer-start-idle
3 0% tooltip-hide
2 0% - redisplay_internal (C function)
1 0% - funcall
1 0% - #<compiled 0x4f9dac7e18824a>
1 0% - gui-backend-selection-exists-p
1 0% - apply
1 0% #<compiled -0x16887ad6f3ef152d>
1 0% - jit-lock-function
1 0% - jit-lock-fontify-now
1 0% - jit-lock--run-functions
1 0% - #<compiled -0x152f64ab9864c87b>
1 0% - font-lock-fontify-region
1 0% - font-lock-default-fontify-region
1 0% - font-lock-fontify-syntactically-region
1 0% syntax-ppss
2 0% - #<compiled 0x1cf15f5a0be052d1>
1 0% - filter-buffer-substring
1 0% - buffer-substring--filter
1 0% - #<compiled 0x1f88987120b96adb>
1 0% apply
Also, I've attached a video of what I'm doing.
VID_20210206_211819.tar.xz
<https://drive.google.com/file/d/19dsfdY_f30FKRTGJld28wuBcJB0T8LrT/view?usp=drive_web>
--
Best regards,
Andrey Listopadov
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--000000000000983dfe05baaf3052--
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.Received: (at 46350) by debbugs.gnu.org; 6 Feb 2021 17:59:24 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 06 12:59:24 2021 Received: from localhost ([127.0.0.1]:46403 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1l8Rrg-00039o-HP for submit <at> debbugs.gnu.org; Sat, 06 Feb 2021 12:59:24 -0500 Received: from eggs.gnu.org ([209.51.188.92]:58608) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1l8Rre-00039Y-M2 for 46350 <at> debbugs.gnu.org; Sat, 06 Feb 2021 12:59:22 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:43383) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1l8RrZ-0005L1-Dj; Sat, 06 Feb 2021 12:59:17 -0500 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4636 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1l8RrX-0001RU-VD; Sat, 06 Feb 2021 12:59:16 -0500 Date: Sat, 06 Feb 2021 19:59:23 +0200 Message-Id: <83a6shnklg.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Andrey Orst <andreyorst@HIDDEN> In-Reply-To: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> (message from Andrey Orst on Sat, 6 Feb 2021 20:33:56 +0300) Subject: Re: bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples References: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN> X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 46350 Cc: 46350 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > From: Andrey Orst <andreyorst@HIDDEN> > Date: Sat, 6 Feb 2021 20:33:56 +0300 > > 1. Run emacs -q > 2. Open some big file, in my case I've opened lisp-mode.el > 3. Turn on fundamental-mode (optional) > 4. Go to the end of the buffer. > 5. Rapidly produce scroll up events from touchpad or mouse wheel > (although it is much harder to achieve with mouse) with significant > scroll amount. By significant scroll amount I mean continuous > scrolling event from touchpad, which can be achieved by swiping over > whole touchpad area very rapidly. > 6. Observe that Emacs doesn't scroll almost at all and just waits until > scroll events will stop. Then it scrolls correct amount. > > The delay I'm talking about is what bothers me. I cannot reproduce this. Did you try "emacs -Q"? Please load mwheel.el (NOT the .elc file!), and then profile the slow scrolling again and show a fully-expanded profile. That might help us understand what part of mwheel-scroll takes the lion's share of CPU cycles.
bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
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From: Andrey Orst <andreyorst@HIDDEN>
Date: Sat, 6 Feb 2021 20:33:56 +0300
Message-ID: <CAAKhXobpGN2iUxHYkYRx8Ma7Gh=cSOGU=m3z2FYF_fJ2nU7bLg@HIDDEN>
Subject: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples
To: bug-gnu-emacs@HIDDEN
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Hello. I'm experiencing major slowdown in Emacs -q fundamental mode
when setting `mouse-wheel-progressive-speed' to `nil'. Here are
reproduction steps:
1. Run emacs -q
2. Open some big file, in my case I've opened lisp-mode.el
3. Turn on fundamental-mode (optional)
4. Go to the end of the buffer.
5. Rapidly produce scroll up events from touchpad or mouse wheel
(although it is much harder to achieve with mouse) with significant
scroll amount. By significant scroll amount I mean continuous
scrolling event from touchpad, which can be achieved by swiping over
whole touchpad area very rapidly.
6. Observe that Emacs doesn't scroll almost at all and just waits until
scroll events will stop. Then it scrolls correct amount.
The delay I'm talking about is what bothers me.
First, there's no delay at all when scrolling with scrollbars
(provided by `scroll-bar-mode'). I can scroll with scrollbars as
rapidly as I want, and there is literally no lag whatsoever.
Second, when producing slow scrolling motion on touchpad or mouse
(e.g. one line at a time) scrolling is very responsive. But I'm
scrolling one line at a time very rarely so this is useless to me.
Third, this bug also reproduces with default value of
`mouse-wheel-progressive-speed', although it is a bit more difficult
to catch this as it requires enormously big buffer for lag to build
up, as scrolling increases in speed (seemingly) exponentially and can
reach top of the buffer before lag builds up significantly.
Last but not least, this also happens when scrolling down (to buffer
end) but the lag seems to be smaller, yet it still noticeable.
I've did some profiling during irresponsibility the amount of CPU
samples is enormous, but down the tree, called functions don't consume
much. Here's a fragment of report, and I've also attached profiler
exported report to the mail:
4400 88% - command-execute
4359 87% - funcall-interactively
3776 75% - mwheel-scroll
26 0% mouse-wheel--get-scroll-window
26 0% - run-with-timer
23 0% - run-at-time
4 0% timer-set-time
1 0% timer-set-function
1 0% timer-activate
23 0% - scroll-up
12 0% - eval
8 0% - if
1 0% display-graphic-p
1 0% mode-line-eol-desc
19 0% - scroll-down
9 0% - eval
7 0% - if
1 0% frame-parameter
1 0% unless
15 0% - error-message-string
11 0% - substitute-command-keys
7 0% - #<compiled -0x1fc708cc6b8a9a73>
4 0% - kill-buffer
2 0% - replace-buffer-in-windows
1 0% - unrecord-window-buffer
1 0% assq-delete-all
2 0% #<compiled -0xd2dd66c27d231f8>
1 0% message
288 5% - scroll-bar-toolkit-scroll
264 5% - sit-for
10 0% - redisplay_internal (C function)
2 0% - eval
1 0% mode-line-eol-desc
1 0% if
My wild guess is that touchpad sends much more input to Emacs, compared
to mouse, and that's why scrolling function has to work with much more
inputs and hence the struggle. I was under assumption that Emacs'
font-lock was the culprit here, as disabling it kinda helps, but then
I've managed to reproduce it without font locking and now I think that
there might be another issue. Everything I've tested happened on GCC
Emacs branch, but also happens (and actually a bit more noticeable in
27.1 and master branches).
In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.13, cairo version 1.16.0)
of 2021-01-17 built on toolbox
Repository revision: 88100bed0af530f04cf56acca9f9d1bb12b45771
Repository branch: feature/native-comp
Windowing system distributor 'Fedora Project', version 11.0.12010000
System Description: Fedora 33 (Workstation Edition)
Configured using:
'configure --with-nativecomp --with-mailutils
--prefix=/home/andreyorst/.local/emacs
--bindir=/home/andreyorst/.local/bin
'--program-transform-name=s/^ctags$/ctags.emacs/''
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PNG RSVG SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE
XIM XPM GTK3 ZLIB
Important settings:
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Fundamental
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
rfc822 mml mml-sec epa derived epg epg-config gnus-util rmail
rmail-loaddefs auth-source eieio eieio-core eieio-loaddefs
password-cache json map mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils jka-compr shortdoc text-property-search
cl-indent comp comp-cstr warnings rx cl-seq cl-macs cl-extra seq
byte-opt gv bytecomp byte-compile cconv inf-lisp comint ansi-color ring
thingatpt profiler help-fns radix-tree cl-print debug backtrace
help-mode find-func time-date subr-x vc-git diff-mode easymenu
easy-mmode cl-loaddefs cl-lib iso-transl tooltip eldoc electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite charscript charprop case-table epa-hook
jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice button
loaddefs faces cus-face pcase macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit x multi-tty make-network-process nativecomp
emacs)
Memory information:
((conses 16 120435 14545)
(symbols 48 9569 1)
(strings 32 28965 2841)
(string-bytes 1 952843)
(vectors 16 38276)
(vector-slots 8 804855 15451)
(floats 8 80 204)
(intervals 56 3638 189)
(buffers 984 12))
--
Best regards,
Andrey Listopadov
--00000000000010cc2505baae5888
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--00000000000010cc2505baae5888--
Andrey Orst <andreyorst@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#46350; Package emacs.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.