From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp0 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id MHLGKLcZXl95CQAA0tVLHw (envelope-from ) for ; Sun, 13 Sep 2020 13:08:07 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp0 with LMTPS id EJkVI7cZXl/ybgAA1q6Kng (envelope-from ) for ; Sun, 13 Sep 2020 13:08:07 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id E50C994050D for ; Sun, 13 Sep 2020 13:08:06 +0000 (UTC) Received: from localhost ([::1]:53144 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kHRjh-0003CM-Uz for larch@yhetil.org; Sun, 13 Sep 2020 09:08:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53786) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHRje-0003C1-9J for guix-patches@gnu.org; Sun, 13 Sep 2020 09:08:02 -0400 Received: from debbugs.gnu.org ([209.51.188.43]:38163) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kHRje-0004zG-0w for guix-patches@gnu.org; Sun, 13 Sep 2020 09:08:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kHRjd-0001XS-Sg for guix-patches@gnu.org; Sun, 13 Sep 2020 09:08:01 -0400 X-Loop: help-debbugs@gnu.org Subject: [bug#43340] [PATCH 0/5] Speed up archive export/import Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= Original-Sender: "Debbugs-submit" Resent-CC: guix-patches@gnu.org Resent-Date: Sun, 13 Sep 2020 13:08:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 43340 X-GNU-PR-Package: guix-patches X-GNU-PR-Keywords: patch To: Mathieu Othacehe Cc: 43340@debbugs.gnu.org Received: via spool by 43340-submit@debbugs.gnu.org id=B43340.16000024665890 (code B ref 43340); Sun, 13 Sep 2020 13:08:01 +0000 Received: (at 43340) by debbugs.gnu.org; 13 Sep 2020 13:07:46 +0000 Received: from localhost ([127.0.0.1]:49709 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kHRjO-0001Wv-1c for submit@debbugs.gnu.org; Sun, 13 Sep 2020 09:07:46 -0400 Received: from eggs.gnu.org ([209.51.188.92]:46922) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kHRjL-0001Wh-70 for 43340@debbugs.gnu.org; Sun, 13 Sep 2020 09:07:44 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:57881) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kHRjG-0004y7-1E for 43340@debbugs.gnu.org; Sun, 13 Sep 2020 09:07:38 -0400 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=47048 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kHRjD-00082x-BQ; Sun, 13 Sep 2020 09:07:35 -0400 From: Ludovic =?UTF-8?Q?Court=C3=A8s?= References: <20200911144049.14632-1-ludo@gnu.org> <87een8tl0s.fsf@gnu.org> <87v9gjh3jq.fsf@gnu.org> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 28 Fructidor an 228 de la =?UTF-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu Date: Sun, 13 Sep 2020 15:07:26 +0200 In-Reply-To: <87v9gjh3jq.fsf@gnu.org> (Mathieu Othacehe's message of "Sat, 12 Sep 2020 09:12:09 +0200") Message-ID: <875z8h7rld.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-Spam-Score: -3.3 (---) X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-patches-bounces+larch=yhetil.org@gnu.org Sender: "Guix-patches" X-Scanner: scn0 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx1.migadu.com: domain of guix-patches-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-patches-bounces@gnu.org X-Spam-Score: -1.01 X-TUID: c5w+hAv/WlB0 Hi! Mathieu Othacehe skribis: >>> Specifically, it implements option #4 (spawning =E2=80=98guix authentic= ate=E2=80=99 >>> once for the whole session, instead of spawning it every time a >>> store item needs to be signed or authenticated), achieving a ~15x >>> speedup, which is not bad. :-) > > Woo, congrats! To be clear, it=E2=80=99s 15x on the pathological case where we send only s= mall store items; the difference is obviously less significant if few store items are exported or if the store items are large. Now, I expect it to make a noticeable difference on the typical build farm workload. >> Below is the new Gantt chart for: >> >> perf timechart record guix archive --export -r $(guix build coreutils = -d) -v3 >/tmp/dump >> >> Most of the work happens in =E2=80=98guix authenticate=E2=80=99. > > I never used the "timechart" sub-command but it sounds really > nice. Regarding the option you chose, I think it's the more appropriate > right now. It's very delicate to dedicate time and effort to tweak > guix-daemon and how we use it, having in mind that we'd like to get rid > of it. Yeah. > However, the potential short term gains can be so huge, that for now > it's the best thing to do. I should just do like you, and dive into it > to see what can be done for contention and locking when using > 'build-paths' RPC via Cuirass. Yup, makes sense! > In the meantime, a short review that I hope to complete next week. Thanks for your feedback! Ludo=E2=80=99.