Christopher Baines <mail@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 58035) by debbugs.gnu.org; 18 Oct 2022 15:34:53 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Oct 18 11:34:53 2022 Received: from localhost ([127.0.0.1]:53826 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1okoc2-000897-3e for submit <at> debbugs.gnu.org; Tue, 18 Oct 2022 11:34:53 -0400 Received: from eggs.gnu.org ([209.51.188.92]:35306) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <ludo@HIDDEN>) id 1okobu-00088o-Ff for 58035 <at> debbugs.gnu.org; Tue, 18 Oct 2022 11:34:36 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:52694) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <ludo@HIDDEN>) id 1okobn-0000fg-Ql; Tue, 18 Oct 2022 11:34:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-Version:In-Reply-To:Date:References:Subject:To: From; bh=FZFB2ulcELgjcRcpmG1jkYBcdUYOtCS7brzU8Icgpts=; b=iOK4Qp/t9uaeQ8fXa7jR CYZ7OuhNeea8lO4ndyVia25pRFOaZKSD20IUdjq2cNRVBqYYtPOhVpNHJ5PHRCq/j6eAPkJbchJQa 9MPHIdcu3WNxLL1jYaem8K2j3oxiqyZdEwQR+mYc2qHJ4JtMMxCcmtPk+PFCChKV5qEkpCQooxmXr Di3LYP1464xEUApaLMlORiCiLBW81kzRREx85ylqp2jEEl5xWK2IJwrQE2oSAdQO0MPU2OAgOdp3g 1lFY4F1uvlwpWNL31Tmr/SzTiKNuir13eBpJ9fKhXErf+4xdr/czkOVS8MVxXThDcghSih43PKwkJ z+L1s/ZDRk0iag==; Received: from [193.50.110.209] (port=57296 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <ludo@HIDDEN>) id 1okobl-0007Me-Cu; Tue, 18 Oct 2022 11:34:22 -0400 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN> To: zimoun <zimon.toutoune@HIDDEN> Subject: Re: [bug#58035] sync-before-registering is false, possibly the cause of empty files in the store References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> <87zgebs1h5.fsf@HIDDEN> <878rlel43z.fsf@HIDDEN> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: Septidi 27 =?utf-8?Q?Vend=C3=A9miaire?= an 231 de la =?utf-8?Q?R=C3=A9volution=2C?= jour du Piment 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: Tue, 18 Oct 2022 17:34:19 +0200 In-Reply-To: <878rlel43z.fsf@HIDDEN> (zimoun's message of "Mon, 17 Oct 2022 20:03:28 +0200") Message-ID: <87sfjlkux0.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 58035 Cc: Maxime Devos <maximedevos@HIDDEN>, 58035 <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 (-) Hi, zimoun <zimon.toutoune@HIDDEN> skribis: > 3x time slower with my hardware. Closing? Ouch! > On mar., 04 oct. 2022 at 23:49, Ludovic Court=C3=A8s <ludo@HIDDEN> wrote: > >> Maybe a good test would be to run a daemon on an =E2=80=9Caverage=E2=80= =9D HDD with >> sync-before-registering =3D true and to run =E2=80=98perf timechart reco= rd=E2=80=99 while >> it=E2=80=99s fetching a large number of substitutes. That way we=E2=80= =99d have >> concrete data to talk about. > > + Comparison using the manifest below. > + guix-daemon built using fd4cbcbed7; two flavors. > + Guix revision f43a783. > + Before the experiment, complete =E2=80=99guix gc=E2=80=99. > > # test-58035/guix-daemon --build-users-group=3Dguixbuild > # perf timechart record > $ time guix build -m some-packages.scm > # perf timechart --highlight guix OK. > 1/ sync-before-registering =3D false > > real 6m24.215s > user 0m10.627s > sys 0m0.512s > > [ perf record: Woken up 1984 times to write data ] > [ perf record: Captured and wrote 497.403 MB perf.data (5042727 samples)] > > > 2/ sync-before-registering =3D true > > real 19m46.470s > user 0m12.367s > sys 0m0.557s=20=20=20=20=20=20 > > [ perf record: Woken up 2625 times to write data ] > [ perf record: Captured and wrote 658.066 MB perf.data (6712342 samples) ] That speaks for itself. Let=E2=80=99s keep the bug open in case Maxime or someone else comes up wit= h a more practical fix. Thanks, Ludo=E2=80=99.
guix-patches@HIDDEN:bug#58035; Package guix-patches.
Full text available.Received: (at 58035) by debbugs.gnu.org; 17 Oct 2022 18:51:50 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Oct 17 14:51:49 2022 Received: from localhost ([127.0.0.1]:49977 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1okVDJ-0005DO-M4 for submit <at> debbugs.gnu.org; Mon, 17 Oct 2022 14:51:49 -0400 Received: from albert.telenet-ops.be ([195.130.137.90]:50430) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <maximedevos@HIDDEN>) id 1okVDH-0005DF-15 for 58035 <at> debbugs.gnu.org; Mon, 17 Oct 2022 14:51:48 -0400 Received: from [192.168.75.79] ([188.188.1.40]) by albert.telenet-ops.be with bizsmtp id Z6rj2800E0rnR8C066rjgE; Mon, 17 Oct 2022 20:51:45 +0200 Message-ID: <aa1f542d-9de6-41a0-4eec-2f4390950b7a@HIDDEN> Date: Mon, 17 Oct 2022 20:51:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: [bug#58035] sync-before-registering is false, possibly the cause of empty files in the store Content-Language: en-US To: zimoun <zimon.toutoune@HIDDEN>, =?UTF-8?Q?Ludovic_Court=c3=a8s?= <ludo@HIDDEN> References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> <87zgebs1h5.fsf@HIDDEN> <878rlel43z.fsf@HIDDEN> From: Maxime Devos <maximedevos@HIDDEN> In-Reply-To: <878rlel43z.fsf@HIDDEN> Content-Type: multipart/signed; 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boundary="------------WR3WxPawRc7hU0MIkFlr8wM9"; protected-headers="v1" From: Maxime Devos <maximedevos@HIDDEN> To: zimoun <zimon.toutoune@HIDDEN>, =?UTF-8?Q?Ludovic_Court=c3=a8s?= <ludo@HIDDEN> Cc: 58035 <at> debbugs.gnu.org Message-ID: <aa1f542d-9de6-41a0-4eec-2f4390950b7a@HIDDEN> Subject: Re: [bug#58035] sync-before-registering is false, possibly the cause of empty files in the store References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> <87zgebs1h5.fsf@HIDDEN> <878rlel43z.fsf@HIDDEN> In-Reply-To: <878rlel43z.fsf@HIDDEN> --------------WR3WxPawRc7hU0MIkFlr8wM9 Content-Type: multipart/mixed; boundary="------------qjURFzGFdUeCG1kMfxq0h14c" --------------qjURFzGFdUeCG1kMfxq0h14c Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 DQoNCk9uIDE3LTEwLTIwMjIgMjA6MDMsIHppbW91biB3cm90ZToNCj4gM3ggdGltZSBzbG93 ZXIgd2l0aCBteSBoYXJkd2FyZS4gIENsb3Npbmc/DQoNCkkgaGFkIGFuIGFsdGVybmF0aXZl IHByb3Bvc2FsIHRvICdzeW5jLWJlZm9yZS1yZWdpc3RlcmluZyA9IHRydWUnIC0tIA0KbW9y ZSB3b3JrIHRvIGltcGxlbWVudCwgYnV0IHBvdGVudGlhbGx5IGZhc3Rlciwgc28gSU1PIG5v Lg0KDQpHcmVldGluZ3MsDQpNYXhpbWUuDQo= --------------qjURFzGFdUeCG1kMfxq0h14c Content-Type: application/pgp-keys; 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guix-patches@HIDDEN:bug#58035; Package guix-patches.
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From: zimoun <zimon.toutoune@HIDDEN>
To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@HIDDEN>, Maxime Devos
<maximedevos@HIDDEN>
Subject: Re: [bug#58035] sync-before-registering is false, possibly the
cause of empty files in the store
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References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN>
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Hi,
3x time slower with my hardware. Closing?
On mar., 04 oct. 2022 at 23:49, Ludovic Court=C3=A8s <ludo@HIDDEN> wrote:
> Maybe a good test would be to run a daemon on an =E2=80=9Caverage=E2=80=
=9D HDD with
> sync-before-registering =3D true and to run =E2=80=98perf timechart recor=
d=E2=80=99 while
> it=E2=80=99s fetching a large number of substitutes. That way we=E2=80=
=99d have
> concrete data to talk about.
+ Comparison using the manifest below.
+ guix-daemon built using fd4cbcbed7; two flavors.
+ Guix revision f43a783.
+ Before the experiment, complete =E2=80=99guix gc=E2=80=99.
# test-58035/guix-daemon --build-users-group=3Dguixbuild
# perf timechart record
$ time guix build -m some-packages.scm
# perf timechart --highlight guix
1/ sync-before-registering =3D false
real 6m24.215s
user 0m10.627s
sys 0m0.512s
[ perf record: Woken up 1984 times to write data ]
[ perf record: Captured and wrote 497.403 MB perf.data (5042727 samples)]
2/ sync-before-registering =3D true
real 19m46.470s
user 0m12.367s
sys 0m0.557s=20=20=20=20=20=20
[ perf record: Woken up 2625 times to write data ]
[ perf record: Captured and wrote 658.066 MB perf.data (6712342 samples) ]
Well, the charts are really big.
$ du -sh {1,2}-build-*.svg
331M 1-build-false.svg
599M 2-build-true.svg
Therefore, please find them using this link (alive for 15 days):
https://filesender.renater.fr/?s=3Ddownload&token=3D0e861286-ec0c-4815-bb49=
-2bce91b14462
Cheers,
simon
--8<---------------cut here---------------start------------->8---
(use-modules (guix build-system haskell)
(guix build-system julia)
(guix packages)
(guix profiles)
(gnu packages))
(manifest
(map package->manifest-entry
(fold-packages
(lambda (package result)
(if (or
;;(eq? (package-build-system package) haskell-build-system)
(eq? (package-build-system package) julia-build-system))
(cons package result)
result))
'())))
--8<---------------cut here---------------end--------------->8---
--8<---------------cut here---------------start------------->8---
diff --git a/nix/libstore/globals.cc b/nix/libstore/globals.cc
index d4f9a46a74..5f8a3a3031 100644
--- a/nix/libstore/globals.cc
+++ b/nix/libstore/globals.cc
@@ -40,7 +40,7 @@ Settings::Settings()
reservedSize =3D 8 * 1024 * 1024;
fsyncMetadata =3D true;
useSQLiteWAL =3D true;
- syncBeforeRegistering =3D false;
+ syncBeforeRegistering =3D true;
useSubstitutes =3D true;
useChroot =3D false;
impersonateLinux26 =3D false;
--8<---------------cut here---------------end--------------->8---
guix-patches@HIDDEN:bug#58035; Package guix-patches.
Full text available.Received: (at 58035) by debbugs.gnu.org; 7 Oct 2022 09:44:30 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Oct 07 05:44:30 2022 Received: from localhost ([127.0.0.1]:34385 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ogju9-00021Y-RB for submit <at> debbugs.gnu.org; Fri, 07 Oct 2022 05:44:30 -0400 Received: from eggs.gnu.org ([209.51.188.92]:46470) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <ludo@HIDDEN>) id 1ogju7-00021I-66 for 58035 <at> debbugs.gnu.org; Fri, 07 Oct 2022 05:44:28 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:45428) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <ludo@HIDDEN>) id 1ogjtz-0001vS-24; Fri, 07 Oct 2022 05:44:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-Version:In-Reply-To:Date:References:Subject:To: From; bh=FiiLpuw9yI2aKyra2TIQ3AZ7IcIspzFgHe1xAaPqeGA=; b=FoNeotfqySuPUmE5s3lH 8NE0ldCcUlmn6e/D1W+frZ+53wMV/uD3l38nL0u5VIthYFovzeDZ4/WYxOW9l8/wtJ40xQhUje/Le IXrhVz3j+FBBYVEn/7+Kw4eziv8DypiAXrhLDFn7CwDOb39o7yiozIKSc4KtNZvmKE5c3UEwiQ4r3 r8jRmAbXmx0O/NCwofWP1BNdiq/tBTU37JzNWqn60OKqDHmnKXsePD/BY9ncIrJgbYvEe0PUZj3xh TBgoIcr8SIjR0Nv6Qrti7GjAoQ5tEkvGzzsrtvdGjFYM558VGzCKumXBNX6bznnriwTsaa68c2g5W 6272vyNbaZunsQ==; Received: from [193.50.110.253] (port=44070 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <ludo@HIDDEN>) id 1ogjty-0001HK-Gs; Fri, 07 Oct 2022 05:44:18 -0400 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN> To: zimoun <zimon.toutoune@HIDDEN> Subject: Re: [bug#58035] sync-before-registering is false, possibly the cause of empty files in the store References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> <87zgebs1h5.fsf@HIDDEN> <86ilkyzdsl.fsf@HIDDEN> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: Sextidi 16 =?utf-8?Q?Vend=C3=A9miaire?= an 231 de la =?utf-8?Q?R=C3=A9volution=2C?= jour de la Belle de nuit 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: Fri, 07 Oct 2022 11:44:17 +0200 In-Reply-To: <86ilkyzdsl.fsf@HIDDEN> (zimoun's message of "Wed, 05 Oct 2022 13:54:18 +0200") Message-ID: <87o7uoc6j2.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 58035 Cc: Maxime Devos <maximedevos@HIDDEN>, 58035 <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: -3.3 (---) zimoun <zimon.toutoune@HIDDEN> skribis: > On Tue, 04 Oct 2022 at 23:49, Ludovic Court=C3=A8s <ludo@HIDDEN> wrote: > >> Maybe a good test would be to run a daemon on an =E2=80=9Caverage=E2=80= =9D HDD with >> sync-before-registering =3D true and to run =E2=80=98perf timechart reco= rd=E2=80=99 while >> it=E2=80=99s fetching a large number of substitutes. That way we=E2=80= =99d have >> concrete data to talk about. > > What is =E2=80=99perf timechart record=E2=80=99? It=E2=80=99s a tool of Linux=E2=80=99s =E2=80=98perf=E2=80=99=E2=80=94see = =E2=80=98guix install perf=E2=80=99. HTH! Ludo=E2=80=99.
guix-patches@HIDDEN:bug#58035; Package guix-patches.
Full text available.Received: (at 58035) by debbugs.gnu.org; 7 Oct 2022 07:55:31 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Oct 07 03:55:31 2022 Received: from localhost ([127.0.0.1]:34229 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ogiCh-0005Yv-16 for submit <at> debbugs.gnu.org; Fri, 07 Oct 2022 03:55:31 -0400 Received: from mail-wm1-f47.google.com ([209.85.128.47]:38578) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <zimon.toutoune@HIDDEN>) id 1ogiCc-0005Yf-B8 for 58035 <at> debbugs.gnu.org; Fri, 07 Oct 2022 03:55:30 -0400 Received: by mail-wm1-f47.google.com with SMTP id h189-20020a1c21c6000000b003bd44dc526fso491592wmh.3 for <58035 <at> debbugs.gnu.org>; Fri, 07 Oct 2022 00:55:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from:from:to:cc:subject:date; bh=awl7vjyHhTct3z5AmV8NRGuZRPz5nemm8WTlln3769Q=; b=OPBmdRlZ/4Ah6YrEWIpdAAZS7bnXg7yO50Fy6WsmqySanZ5m/M+GlutG+C2/+r5BUr 5KmoVj5osUaa6x5s+ed6i3PR/9OQPlu7KFcUJQVZPpL6lZBnmUSdx7If3UIV/JTIYH39 zWIctdei5U7A2pXL3ZF5E26u/e/vyv3dQe4uwRQ6DNWHi9joSFrY9s49w9FZPCbIJwRq 660bh2gLUWlfJ1+6DTdT4be8vEZOW/VT0U7U+JSyRW9glgilKAVF0Rd9mOd2xeONHGca nfj3MriMBrfTmDD1m7pXiTT1OnwxQA34pRYeIsyOQWObpQtcXO1prcxNLt1oFY4X4Jtf /myA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=awl7vjyHhTct3z5AmV8NRGuZRPz5nemm8WTlln3769Q=; b=cDzzlo/607GIcG1t59jHTIzuIcvzi2reVn4uoUhzy/92JiJyyw4T4ULSoP4kfLVa10 VIwZrYvqoTqxorI5KWQMjTF/sXX05GEQrCgvCLomAKbNqCf/TTh8JVKErwLfe6KTOEBa ZB5IaD+EW3LNDKu6Jji5N9ogJcOPYG3NhZTNlDqObsAkqYJ5wgZMgk1UQ5ZL7tRLDSAZ K8qOcKidKS4l1G+Cd2/fg6bBRvMSdqB85eU3FrNLsb9ndmvssPskP2/twtTb5YF/O5O5 6QFZA3PuH0kZIOCnQPZAynO9ywA5m5qi1HBM49xpdA5PT2oiXL5qyA+/U0RqsucH56lQ X3Hg== X-Gm-Message-State: ACrzQf0dbTVF0KA4/kxqnlzOc0jqrNKbB1i48Bmi4909bALMhUH/kj++ 7heMltuq5zpMDiXEsopRz8rIromDuoU= X-Google-Smtp-Source: AMsMyM7ZNpn3iR71yY8uEgShf3H1JlzZEm8Pb3EipwyVE5u3QMJzozLvs07Sg3Ne6ailaejx2RS9aQ== X-Received: by 2002:a05:600c:21c7:b0:3bd:ef29:2d08 with SMTP id x7-20020a05600c21c700b003bdef292d08mr9205407wmj.177.1665129319369; Fri, 07 Oct 2022 00:55:19 -0700 (PDT) Received: from lili (roam-nat-fw-prg-194-254-61-43.net.univ-paris-diderot.fr. [194.254.61.43]) by smtp.gmail.com with ESMTPSA id h4-20020a05600c350400b003c1a7ea3736sm1770041wmq.11.2022.10.07.00.55.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Oct 2022 00:55:18 -0700 (PDT) From: zimoun <zimon.toutoune@HIDDEN> To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@HIDDEN>, Maxime Devos <maximedevos@HIDDEN> Subject: Re: [bug#58035] sync-before-registering is false, possibly the cause of empty files in the store In-Reply-To: <87zgebs1h5.fsf@HIDDEN> References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> <87zgebs1h5.fsf@HIDDEN> Date: Wed, 05 Oct 2022 13:54:18 +0200 Message-ID: <86ilkyzdsl.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.5 (/) X-Debbugs-Envelope-To: 58035 Cc: 58035 <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: -0.5 (/) Hi, On Tue, 04 Oct 2022 at 23:49, Ludovic Court=C3=A8s <ludo@HIDDEN> wrote: > Maybe a good test would be to run a daemon on an =E2=80=9Caverage=E2=80= =9D HDD with > sync-before-registering =3D true and to run =E2=80=98perf timechart recor= d=E2=80=99 while > it=E2=80=99s fetching a large number of substitutes. That way we=E2=80= =99d have > concrete data to talk about. What is =E2=80=99perf timechart record=E2=80=99? I can take a look if no o= ne beats me. Cheers, simon
guix-patches@HIDDEN:bug#58035; Package guix-patches.
Full text available.Received: (at 58035) by debbugs.gnu.org; 5 Oct 2022 07:58:41 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Oct 05 03:58:40 2022 Received: from localhost ([127.0.0.1]:55791 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ofzIe-0001Po-Jr for submit <at> debbugs.gnu.org; Wed, 05 Oct 2022 03:58:40 -0400 Received: from laurent.telenet-ops.be ([195.130.137.89]:48476) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <maximedevos@HIDDEN>) id 1ofzIa-0001Pb-CA for 58035 <at> debbugs.gnu.org; Wed, 05 Oct 2022 03:58:39 -0400 Received: from [192.168.107.79] ([188.188.13.203]) by laurent.telenet-ops.be with bizsmtp id U7ya280034Nrees017yaC9; Wed, 05 Oct 2022 09:58:35 +0200 Message-ID: <d5501c08-2972-c12f-ea06-f1320c84aba4@HIDDEN> Date: Wed, 5 Oct 2022 09:58:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.0 Subject: Re: bug#58035: sync-before-registering is false, possibly the cause of empty files in the store To: =?UTF-8?Q?Ludovic_Court=c3=a8s?= <ludo@HIDDEN> References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> <87zgebs1h5.fsf@HIDDEN> Content-Language: en-US From: Maxime Devos <maximedevos@HIDDEN> In-Reply-To: <87zgebs1h5.fsf@HIDDEN> Content-Type: multipart/signed; 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boundary="------------C7CF7xj08P6MRetlWz0nnAaF"; protected-headers="v1" From: Maxime Devos <maximedevos@HIDDEN> To: =?UTF-8?Q?Ludovic_Court=c3=a8s?= <ludo@HIDDEN> Cc: 58035 <at> debbugs.gnu.org Message-ID: <d5501c08-2972-c12f-ea06-f1320c84aba4@HIDDEN> Subject: Re: bug#58035: sync-before-registering is false, possibly the cause of empty files in the store References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> <87zgebs1h5.fsf@HIDDEN> In-Reply-To: <87zgebs1h5.fsf@HIDDEN> --------------C7CF7xj08P6MRetlWz0nnAaF Content-Type: multipart/mixed; boundary="------------3mPjXrYg7nhkc1xZuKZWl4pV" --------------3mPjXrYg7nhkc1xZuKZWl4pV Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 DQoNCk9uIDA0LTEwLTIwMjIgMjM6NDksIEx1ZG92aWMgQ291cnTDqHMgd3JvdGU6DQo+IEhp LA0KPiANCj4gTWF4aW1lIERldm9zIDxtYXhpbWVkZXZvc0B0ZWxlbmV0LmJlPiBza3JpYmlz Og0KPg0KPj4gJ3N5bmMnIHNlZW1zIHJlbGF0aXZlbHkgaW5leHBlbnNpdmUgdG8gbWUsIGNv bXBhcmVkIHRvIHRoZSB0aW1lDQo+PiByZXF1aXJlZCBmb3IgYnVpbGRpbmcgYSBwYWNrYWdl IGFuZCBldmVuIG1vcmUgaW5leHBlbnNpdmUgY29tcGFyZWQgdG8NCj4+IHRoZSBjb3N0IG9m IGRlYnVnZ2luZyBzdG9yZSBjb3JydXB0aW9uOg0KPiANCj4gVGhhdOKAmXMgbm90IGEgZmFp ciBjb21wYXJpc29uLiAgOi0pDQoNClBvc3NpYmx5LCBvcGVuamRrIGlzIGEgYml0IG9mIGFu IGV4dHJlbWUgY2FzZS4NCg0KPiBJbWFnaW5lLCB5b3UgcnVuIHJlY29uZmlndXJlL3VwZ3Jh ZGU7DQo+IHRoYXQgZG93bmxvYWRzIHRlbnMgdG8gaHVuZHJlZHMgb2Ygc3RvcmUgaXRlbXMu ICBDYWxsaW5nIHN5bmMoMikgYWZ0ZXINCj4gZWFjaCBpdGVtIG1heSBiZSBoYXJkbHkgbm90 aWNlYWJseSBvbiBhbiBTU0QsIGJ1dCBJIGJldCBpdOKAmXMgZ29pbmcgdG8gYmUNCj4gc3Vw ZXIgZXhwZW5zaXZlIG9uIGFuIEhERC4gIChJbiB0aGUgc3lzbG9nZCBjYXNlLCBlYWNoIGZz eW5jKDIpIGNhbGzigJRub3QNCj4gZXZlbiBzeW5jKDIp4oCUd291bGQgY2F1c2UgcGF1c2Vz IG9mIHNldmVyYWwgMTAwcyBvZiBtcy4pDQoNCklmIGFmdGVyIHNvbWUgdGVzdGluZywgdGhp cyB0dXJucyBvdXQgdG8gYmUgYSBwcm9ibGVtLCB0aGVyZSBhcmUgc29tZSANCm9wdGlvbnMg dG8gYXZvaWQgdGhpcyAoc2VlOiB0aGUgZGVsYXlpbmcgJ2ZzeW5jJyBvZiB0aGUgcHJldmlv dXMgcmVzcG9uc2UpLg0KDQo+IE1heWJlIGEgZ29vZCB0ZXN0IHdvdWxkIGJlIHRvIHJ1biBh IGRhZW1vbiBvbiBhbiDigJxhdmVyYWdl4oCdIEhERCB3aXRoDQo+IHN5bmMtYmVmb3JlLXJl Z2lzdGVyaW5nID0gdHJ1ZSBhbmQgdG8gcnVuIOKAmHBlcmYgdGltZWNoYXJ0IHJlY29yZOKA mSB3aGlsZQ0KPiBpdOKAmXMgZmV0Y2hpbmcgYSBsYXJnZSBudW1iZXIgb2Ygc3Vic3RpdHV0 ZXMuICBUaGF0IHdheSB3ZeKAmWQgaGF2ZQ0KPiBjb25jcmV0ZSBkYXRhIHRvIHRhbGsgYWJv dXQuDQo+IA0KPiBBbnkgdGFrZXJzPyAgOi0pDQoNCkkgZG9uJ3QgaGF2ZSBhIEhERCB0byB0 ZXN0IHN5bmMtYmVmb3JlLXJlZ2lzdGVyaW5nPXRydWUgd2l0aC4NCg0KR3JlZXRpbmdzLA0K TWF4aW1lLg0K --------------3mPjXrYg7nhkc1xZuKZWl4pV Content-Type: application/pgp-keys; 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guix-patches@HIDDEN:bug#58035; Package guix-patches.
Full text available.Received: (at 58035) by debbugs.gnu.org; 4 Oct 2022 21:50:09 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Oct 04 17:50:09 2022 Received: from localhost ([127.0.0.1]:55369 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ofpnk-0000sr-Ok for submit <at> debbugs.gnu.org; Tue, 04 Oct 2022 17:50:09 -0400 Received: from eggs.gnu.org ([209.51.188.92]:35220) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <ludo@HIDDEN>) id 1ofpni-0000sO-GL for 58035 <at> debbugs.gnu.org; Tue, 04 Oct 2022 17:50:07 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:44028) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <ludo@HIDDEN>) id 1ofpnd-0002l7-09; Tue, 04 Oct 2022 17:50:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-Version:In-Reply-To:Date:References:Subject:To: From; bh=VAm2QkXVFB3DQk/2yY0FGj3GmTfzyfsG6hwXnR3/VoA=; b=BkT/Rvaa0srVJAOHJkrt w7S9DKNbItu8KWUZixGUm5V04S3Kev/PW1Pe9/TL3cT4n9LBfCyxPAv7/wqXaa9kL87zFGQp84uuV LpEO3H3TBismAnAEWS3KeoiNZJpucwSLSX1BFZcLw2hyTh1HRWG13DwKoO3hCvGO479Yyp8vUA9Fv llUvAhtvr/v4kol58Kj4Q8m9/IolKpYa2iWNlnc5tAlLo+KpaCDI1l/1bMv/JpBKv21aKE6cCTpeI O2t4MLCgCR+RtyDci3EALtsPrtJCPTDJVoJ8TKaaVaxCLeCciBZCqlUfouuhbI46t0lc8YnyNMdSv NIQCXU5AquhctA==; Received: from 91-160-117-201.subs.proxad.net ([91.160.117.201]:50544 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <ludo@HIDDEN>) id 1ofpnc-0008QJ-Iy; Tue, 04 Oct 2022 17:50:00 -0400 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN> To: Maxime Devos <maximedevos@HIDDEN> Subject: Re: bug#58035: sync-before-registering is false, possibly the cause of empty files in the store References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: Tridi 13 =?utf-8?Q?Vend=C3=A9miaire?= an 231 de la =?utf-8?Q?R=C3=A9volution=2C?= jour du Potiron 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: Tue, 04 Oct 2022 23:49:58 +0200 In-Reply-To: <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> (Maxime Devos's message of "Tue, 4 Oct 2022 16:04:29 +0200") Message-ID: <87zgebs1h5.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 58035 Cc: 58035 <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: -3.3 (---) Hi, Maxime Devos <maximedevos@HIDDEN> skribis: > On 04-10-2022 09:52, Ludovic Court=C3=A8s wrote: >> Hi, >> [...] >>> However, currently sync-before-registering is set to 'false' AFAICT. >>> I think this might be the cause of bugs like >>> <https://issues.guix.gnu.org/58013> (=E2=80=98Can't use "guix pull"=E2= =80=99), and >>> maybe <https://issues.guix.gnu.org/57838> (=E2=80=98failing to boot, pr= obably >>> due to guix gc=E2=80=99). >> It might be a factor, combined with the fact that the file system >> was >> not properly unmounted (power outage or similar). >> However, calling sync(2) for each store item is going to be >> expensive. >> Recursive fsync/fdatasync calls are also likely to be too expensive (see >> <https://issues.guix.gnu.org/55707> for a concrete example of the cost >> on a spinning disk). >> Thoughts? > > Debian uses fsync (going by https://wiki.debian.org/Teams/Dpkg/FAQ), > and even though that according to that FAQ dpkg can be slow, in my > experience it wasn't too bad. Also, having to investigate store > corruption and how to fix it is a form of slowness, especially when it > fails or you don't have the technical expertise and consequentially > you need to reinstall (losing old non-back-upped work). Having not experience corruption issues as in the bug you mention, I=E2=80= =99m tempted to minimize the problem, but it=E2=80=99s true that we get such rep= orts from time to time. > 'sync' seems relatively inexpensive to me, compared to the time > required for building a package and even more inexpensive compared to > the cost of debugging store corruption: That=E2=80=99s not a fair comparison. :-) Imagine, you run reconfigure/upg= rade; that downloads tens to hundreds of store items. Calling sync(2) after each item may be hardly noticeably on an SSD, but I bet it=E2=80=99s going = to be super expensive on an HDD. (In the syslogd case, each fsync(2) call=E2=80= =94not even sync(2)=E2=80=94would cause pauses of several 100s of ms.) Maybe a good test would be to run a daemon on an =E2=80=9Caverage=E2=80=9D = HDD with sync-before-registering =3D true and to run =E2=80=98perf timechart record= =E2=80=99 while it=E2=80=99s fetching a large number of substitutes. That way we=E2=80=99d= have concrete data to talk about. Any takers? :-) Ludo=E2=80=99.
guix-patches@HIDDEN:bug#58035; Package guix-patches.
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--------------CICtvJHpdlRBLTViO92n53UT Content-Type: multipart/mixed; boundary="------------ZIckaafTNMOsQLxCf5l0qlH9"; protected-headers="v1" From: Maxime Devos <maximedevos@HIDDEN> To: =?UTF-8?Q?Ludovic_Court=c3=a8s?= <ludo@HIDDEN> Cc: 58035 <at> debbugs.gnu.org Message-ID: <6bd60f0b-ffac-dcc8-5225-df4b765522c5@HIDDEN> Subject: Re: bug#58035: sync-before-registering is false, possibly the cause of empty files in the store References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> <874jwkvxdt.fsf@HIDDEN> In-Reply-To: <874jwkvxdt.fsf@HIDDEN> --------------ZIckaafTNMOsQLxCf5l0qlH9 Content-Type: multipart/mixed; boundary="------------agifQk8P4dk8CByb7GzRM2WU" --------------agifQk8P4dk8CByb7GzRM2WU Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 DQoNCk9uIDA0LTEwLTIwMjIgMDk6NTIsIEx1ZG92aWMgQ291cnTDqHMgd3JvdGU6DQo+IEhp LA0KPiANCj4gWy4uLl0NCj4+IEhvd2V2ZXIsIGN1cnJlbnRseSBzeW5jLWJlZm9yZS1yZWdp 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guix-patches@HIDDEN:bug#58035; Package guix-patches.
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Received: (at 58035) by debbugs.gnu.org; 4 Oct 2022 07:52:46 +0000
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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Maxime Devos <maximedevos@HIDDEN>
Subject: Re: bug#58035: sync-before-registering is false, possibly the cause
of empty files in the store
References: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN>
Date: Tue, 04 Oct 2022 09:52:30 +0200
In-Reply-To: <0530a80e-0a93-5a3a-ef98-5ba3683e810d@HIDDEN> (Maxime Devos's
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Hi,
Maxime Devos <maximedevos@HIDDEN> skribis:
> libstore/local-store.cc has the following comment:
>
> void LocalStore::registerValidPaths(const ValidPathInfos & infos)
> {
> /* SQLite will fsync by default, but the new valid paths may not
> be fsync-ed.
> * So some may want to fsync them before registering the validity,
> at the
> * expense of some speed of the path registering operation. */
> if (settings.syncBeforeRegistering) sync();
>
> [...]
> }
>
> However, currently sync-before-registering is set to 'false' AFAICT.
> I think this might be the cause of bugs like
> <https://issues.guix.gnu.org/58013> (=E2=80=98Can't use "guix pull"=E2=80=
=99), and
> maybe <https://issues.guix.gnu.org/57838> (=E2=80=98failing to boot, prob=
ably
> due to guix gc=E2=80=99).
It might be a factor, combined with the fact that the file system was
not properly unmounted (power outage or similar).
However, calling sync(2) for each store item is going to be expensive.
Recursive fsync/fdatasync calls are also likely to be too expensive (see
<https://issues.guix.gnu.org/55707> for a concrete example of the cost
on a spinning disk).
Thoughts?
Ludo=E2=80=99.
guix-patches@HIDDEN:bug#58035; Package guix-patches.
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Maxime Devos <maximedevos@HIDDEN>:guix-patches@HIDDEN.
Full text available.guix-patches@HIDDEN:bug#58035; Package guix-patches.
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