GNU logs - #44053, boring messages


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Subject: bug#44053: Poor profile generation performance on spinning disks
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From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
Date: Sat, 17 Oct 2020 23:35:45 -0400
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Hello!

I've noticed on multiple occasions that using Guix on traditional
spinning drives can be quite slow.

On my home machine, will is still relying on 2 x 1 TB spinning drives in
RAID1, rebuilding my user profile, which contains 182 entries, takes on
average about 20 minutes, even when there are no packages to be built:

--8<---------------cut here---------------start------------->8--- $ time
guix package -i perl --max-jobs=1 The following package will be
upgraded: perl (dependencies or package changed)

The following derivation will be built:
   /gnu/store/lhywla1z2zcz16df4hbvvvngr9zmswr7-profile.drv

building CA certificate bundle...
building fonts directory...
generating GLib schema cache...
creating GTK+ icon theme cache...
building cache files for GTK+ input methods...
building directory of Info manuals...
building database for manual pages...
building XDG desktop file cache...
building XDG MIME database...
building profile with 182 packages...

real    19m0.126s
user    0m5.648s
sys     0m0.333s
--8<---------------cut here---------------end--------------->8---

Most of the time remains spent after the message 'building profile with
182 package...'.  That part seems IO-bound, with the spinning disks
grinding heavily and the CPU mostly idling.  The rest of the time (3
minutes), was used by the profile hooks.

The same operation on a second, more modern machine equipped with M2
SSDs does much better and takes about 1 minute to accomplish the same,
so it seems the bad performance can be mostly attributed to the much
slower disk seek times of the spinning disks.

On the older machine, two profile hooks are also sticking out w.r.t. the
time they take (they take more than one minute opposed to a few
seconds):

--8<---------------cut here---------------start------------->8---
The following profile hook will be built:
   /gnu/store/08fanpydi7z4i3qnlqbr8iz23zdgsamw-manual-database.drv
building database for manual pages...
Creating manual page database...
[2139/2139] building list of man-db entries...
175322 entries processed in 95.1 s
successfully built /gnu/store/08fanpydi7z4i3qnlqbr8iz23zdgsamw-manual-database.drv
successfully built /gnu/store/08fanpydi7z4i3qnlqbr8iz23zdgsamw-manual-database.drv
/gnu/store/wzp4mk2r7r4ysciw74gqbfkyai0zmrcc-manual-database

real    1m36.378s
user    0m1.674s
sys     0m0.108s

The following profile hook will be built:
   /gnu/store/cir84qj587i6is4akgqand7ahg9bj938-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/cir84qj587i6is4akgqand7ahg9bj938-xdg-mime-database.drv
successfully built /gnu/store/cir84qj587i6is4akgqand7ahg9bj938-xdg-mime-database.drv
/gnu/store/j0bznlj2ibnhirijhnwpkkxzz4qfk8wb-xdg-mime-database

real    1m7.344s
user    0m1.331s
sys     0m0.053s
--8<---------------cut here---------------end--------------->8---

So we should profile what's going on while generating the profile (no
pun intended) and try to improve this at first since this is where most
of the time is spent on spinning drives (17 minutes out of the 20 in the
above example).

After that we could look into the two above profile hooks.

Thanks,

Maxim




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X-Loop: help-debbugs@HIDDEN
From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
Subject: bug#44053: Acknowledgement (Poor profile generation performance
 on spinning disks)
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X-Gnu-PR-Message: ack 44053
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Date: Sun, 18 Oct 2020 03:37:02 +0000

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 Content preview:  I've never used SDDs, so I've been experiencing this since
 I installed Guix (~5 years ago). And yes, building the profile seems to be
 the more resource intensive operation. I usually can't do anything [...] 
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I've never used SDDs, so I've been experiencing this since I installed Guix=
 (~5 years ago). And yes, building the profile seems to be the more resourc=
e intensive operation. I usually can't do anything else while that happens =
because the computer becomes unresponsive.

Running the same command Maxim mentioned took the following time in my case=
:


$ time guix package -i perl --max-jobs=3D1
Se instalar=C3=A1 el siguiente paquete:
=C2=A0=C2=A0 perl 5.30.2
Se construir=C3=A1 la siguiente derivaci=C3=B3n:
=C2=A0=C2=A0 /gnu/store/86g48nh8dhgdhzb8r9bxjk6mmszlssss-profile.drv
construyendo empaquetado de certificados de CA...
construyendo el directorio de tipograf=C3=ADas...
generando la cach=C3=A9 de esquemas de GLib...
creando la cach=C3=A9 de temas de iconos de GTK+...
construyendo los ficheros de cach=C3=A9 para los m=C3=A9todos de entrada de=
 GTK+...
construyendo el directorio de manuales Info...
construyendo la base de datos de p=C3=A1ginas de manual...
construyendo la cach=C3=A9 de ficheros desktop XDG...
construyendo la base de datos MIME XDG...
construyendo perfil con 87 paquetes...


real=C2=A0=C2=A0=C2=A0 8m3,043s
user=C2=A0=C2=A0=C2=A0 0m2,656s
sys=C2=A0=C2=A0=C2=A0 0m0,239s


My computer:

Intel=C2=AE Core=E2=84=A2 i3-8100 CPU @ 3.60GHz =C3=97 4
RAM: 4 GiB
1 TB HDD





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Hi Maxim,

On Sun, 18 Oct 2020 at 05:37, Maxim Cournoyer <maxim.cournoyer@HIDDEN> wrote:

> On my home machine, will is still relying on 2 x 1 TB spinning drives in
> RAID1, rebuilding my user profile, which contains 182 entries, takes on
> average about 20 minutes, even when there are no packages to be built:

The database build time seems correlated to the number of packages in
the very profile.  Well, I have not benchmarked to see if it is
linear, quadratic; or worse or better.


> --8<---------------cut here---------------start------------->8---
[...]
> building XDG MIME database...
> successfully built /gnu/store/cir84qj587i6is4akgqand7ahg9bj938-xdg-mime-database.drv
> successfully built /gnu/store/cir84qj587i6is4akgqand7ahg9bj938-xdg-mime-database.drv
> /gnu/store/j0bznlj2ibnhirijhnwpkkxzz4qfk8wb-xdg-mime-database
>
> real    1m7.344s
> user    0m1.331s
> sys     0m0.053s
> --8<---------------cut here---------------end--------------->8---

Well, it is all clear to me, but I do not know if we can do better
because these 2 XDG updates seem relying on the external binaries
"/bin/update-desktop-database" and "/bin/update-mime-database".  I
have not timed the function 'xdg-desktop-database' but all the time
should be spent on these, I bet. :-)


All the best,
simon




Message sent to bug-guix@HIDDEN:


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From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
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--=-=-=
Content-Type: text/plain

Hello Simon,

zimoun <zimon.toutoune@HIDDEN> writes:

> Hi Maxim,
>
> On Sun, 18 Oct 2020 at 05:37, Maxim Cournoyer <maxim.cournoyer@HIDDEN> wrote:
>
>> On my home machine, will is still relying on 2 x 1 TB spinning drives in
>> RAID1, rebuilding my user profile, which contains 182 entries, takes on
>> average about 20 minutes, even when there are no packages to be built:
>
> The database build time seems correlated to the number of packages in
> the very profile.  Well, I have not benchmarked to see if it is
> linear, quadratic; or worse or better.

It is.  Small profiles operations are much faster than large profiles.
Attached is a slightly trimmed version of the manifest I currently use
for my user profile, if you'd like to benchmark it on your system.

--=-=-=
Content-Type: text/plain
Content-Disposition: attachment; filename=manifest.scm

(use-modules (gnu packages)
             (gnu packages emacs)
             (guix build-system emacs)
             (guix profiles))

(concatenate-manifests
 (list
 ;;; Emacs packages.
  (specifications->manifest
   '("emacs"
     "emacs-auctex"
     "emacs-bash-completion"
     "emacs-bbdb"
     "emacs-cmake-mode"
     "emacs-company"
     "emacs-company-quickhelp"
     "emacs-counsel"
     "emacs-csv-mode"
     "emacs-debbugs"
     "emacs-diff-hl"
     "emacs-el-mock"
     "emacs-elpy"
     "emacs-emms"
     "emacs-ggtags"
     "emacs-go-mode"
     "emacs-grep-a-lot"
     "emacs-guix"
     "emacs-htmlize"
     "emacs-ivy"
     "emacs-magit"
     "emacs-org"
     "emacs-org-reveal"
     "emacs-paredit"
     "emacs-pdf-tools"
     "emacs-qml-mode"
     "emacs-realgud"
     "emacs-string-inflection"
     "emacs-swiper"
     "emacs-w3m"
     "emacs-ws-butler"
     "emacs-yasnippet"
     "emacs-yasnippet-snippets"))

  ;; Other software.
  (specifications->manifest
   '("adb"
     "acpi"
     "alsa-utils"
     "anthy"
     "arc-icon-theme"
     "arc-theme"
     "aspell"
     "aspell-dict-en"
     "aspell-dict-fr"
     "autoconf"
     "automake"
     "autossh"
     "bash"
     "bc"
     "beep"
     "bind:utils"              ;for 'dig'
     "bluez"
     "bridge-utils"
     "cheese"
     "compsize"
     "cqfd"
     "cryptsetup"
     "curl"
     "dbus"
     "dconf"
     "ddcutil"
     "diffoscope"
     "docker-cli"
     "dosfstools"
     "evince"
     "file"
     "font-adobe-source-han-sans"
     "font-dejavu"
     "font-google-roboto"
     "font-hack"
     "gcc-toolchain"
     "gdb"
     "geeqie"
     "ghostscript-with-x"
     "gimp"
     "git"
     "git:send-email"
     "glibc-locales"
     "global"
     "gnome-bluetooth"
     "gnome-boxes"
     "adwaita-icon-theme"
     "hicolor-icon-theme"
     "gnu-standards"
     "gnucash"
     "gnucash:doc"
     "gnupg"
     "graphviz"
     "gtk-engines"
     "guile"
     "guile-readline"
     "guile-sqlite3"
     "guile-ssh"
     "hackneyed-x11-cursors"
     "hicolor-icon-theme"
     "hunspell"
     "hunspell-dict-fr"
     "ibus"
     "ibus-anthy"
     "icecat"
     "imagemagick"
     "inetutils"
     "inkscape"
     "iotop"
     "jack"
     "jami"
     "keepassxc"
     "libjpeg"
     "libmtp"
     "libpcap"
     "libreoffice"
     "libssh"
     "libx11"
     "linphoneqt"
     "lm-sensors"
     "lsof"
     "ltrace"
     "lvm2"                               ;for dmsetup
     "make"
     "man-pages"
     "mesa-utils"
     "mpv"
     "mtr"
     "nmap"
     "openssh"
     "openvpn"
     "parted"
     "pavucontrol"
     "perl"
     "pinentry"
     "pkg-config"
     "poppler"
     "pulseaudio"
     "pv"
     "python"
     "python-wrapper"
     "qemu"
     "recutils"
     "rsync"
     "rtorrent"
     "screen"
     "setxkbmap"
     "shepherd"
     "sicp"
     "smartmontools"
     "spacefm"
     "stow"
     "strace"
     "sysstat"				;for iostat
     "tcpdump"
     "the-silver-searcher"                ;ag
     "time"                             ;aliased to time+
     "transmission"
     "transmission:gui"
     "tree"
     "unzip"
     "vinagre"
     "vorbis-tools"
     "weechat"
     "wget"
     "workrave"
     "wpa-supplicant"
     "xdpyinfo"
     "xdg-utils"
     "xev"
     "xmodmap"
     "xournal"
     "xrandr"
     "xrdb"
     "xsetroot"
     "yelp"
     "gxtuner"
     "shellcheck"))

  ;; Others.
  (specifications->manifest
   '("docker-compose"
     "emacs-adoc-mode"
     "emacs-clang-format"
     "emacs-clang-rename"
     "emacs-feature-mode"
     "picocom"
     "python-git-review"
     "sshpass"
     "ungoogled-chromium"
     "ddrescue"))))

--=-=-=
Content-Type: text/plain


I'm betting that the part to optimize is:

--8<---------------cut here---------------start------------->8---
  ;; Make the symlinks.
  (union-build output inputs
               #:symlink symlink
               #:log-port (%make-void-port "w"))
--8<---------------cut here---------------end--------------->8---

from the 'build-profile' procedure in (guix build profiles).

>
>> --8<---------------cut here---------------start------------->8---
> [...]
>> building XDG MIME database...
>> successfully built /gnu/store/cir84qj587i6is4akgqand7ahg9bj938-xdg-mime-database.drv
>> successfully built /gnu/store/cir84qj587i6is4akgqand7ahg9bj938-xdg-mime-database.drv
>> /gnu/store/j0bznlj2ibnhirijhnwpkkxzz4qfk8wb-xdg-mime-database
>>
>> real    1m7.344s
>> user    0m1.331s
>> sys     0m0.053s
>> --8<---------------cut here---------------end--------------->8---
>
> Well, it is all clear to me, but I do not know if we can do better
> because these 2 XDG updates seem relying on the external binaries
> "/bin/update-desktop-database" and "/bin/update-mime-database".  I
> have not timed the function 'xdg-desktop-database' but all the time
> should be spent on these, I bet. :-)

They do, and this is indeed what takes time.  But, this doesn't stop
motivated wizards from implementing our own database generator in Scheme
that would do the same.  Ludovic had done just that for the man-db
database generator.  The custom code in Guix can do it much faster that
it initially could back when it was relying on man-db to do that (that's
also probably the reason why we have issues such as
https://issues.guix.gnu.org/38838; perhaps the generated database is
slightly different -- but that's another topic :-)).

Thanks,

Maxim

--=-=-=--




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I am just posting my performance numbers.  Hopefully you all find it helpful.
I am running Guix System on a Lenovo Thinkpad T400 with 8GB on a hard drive.

#+BEGIN_SRC sh :results output :exports both
guix describe
#+END_SRC

#+RESULTS:
#+begin_example
Generation 49	Oct 20 2020 01:15:33	(current)
  my-personal-packages 547d900
    repository URL: https://notabug.org/jbranso/guix-packages.git
    branch: master
    commit: 547d900c25d2bb9490946162e0fcb315d6bace68
  guix 93c2518
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 93c251818dcd2bf5f60f42e595504293ee83371a

GUIX_PACKAGE_PATH="/home/joshua/prog/gnu/guix/guix-packages/"
#+end_example

The "XDG MIME database" takes a while.

#+BEGIN_SRC sh :results output :exports both
time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
#+END_SRC

#+RESULTS:
: The following profile hook will be built:
:    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: building XDG MIME database...
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
:
: real	0m43.716s
: user	0m3.626s
: sys	0m0.258s

Cold cache:

#+BEGIN_SRC sh :results output :exports both
drv="$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)"
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'

time guix build --check "$drv"
#+END_SRC

#+RESULTS:
: The following profile hook will be built:
:    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: building XDG MIME database...
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
:
: real	1m29.606s
: user	0m1.401s
: sys	0m0.238s

I have 64 packages in my profile.

#+BEGIN_SRC sh :results output :exports both
guix package -I | wc --lines
#+END_SRC

#+RESULTS:
: 64

If you want to see all packages:

#+BEGIN_SRC sh :results output :exports both
guix package -I
#+END_SRC

#+RESULTS:
#+begin_example
guile-colorized	0.1	out	/gnu/store/5h0jfssgyx49cq82wrmw57an7ngb7kkz-guile-colorized-0.1
font-hack	3.003	out	/gnu/store/52r8anazd4rnkq9m3vxk700jga5h0i74-font-hack-3.003
font-dejavu	2.37	out	/gnu/store/7y3lvk3xf4im8n44337mc6y0ccysvfia-font-dejavu-2.37
font-adobe-source-code-pro	2.030R-ro-1.050R-it	out	/gnu/store/l5m74158njcan3p784gqhkir6zyk0bcp-font-adobe-source-code-pro-2.030R-ro-1.050R-it
sicp	20170703-1.225c172	out	/gnu/store/x2safq6fvcbhp2rljny89qiq74y1xd13-sicp-20170703-1.225c172
unzip	6.0	out	/gnu/store/1zx8knb7h79q6cr4kwhbz6z6v609309w-unzip-6.0
font-google-noto	20171025	out	/gnu/store/g2szydnbvs7qqy2nf7qylba0rapajmd8-font-google-noto-20171025
font-awesome	4.7.0	out	/gnu/store/gknn01i1nr80apmcx42w36cqcz3zzri2-font-awesome-4.7.0
texinfo	6.7	out	/gnu/store/w8k9hcigvhzrlrblv8lgqj77sm3833rs-texinfo-6.7
gcc-toolchain	10.2.0	out	/gnu/store/pknm43xsza6nlc7bn27djip8fis92akd-gcc-toolchain-10.2.0
recutils	1.8	out	/gnu/store/qlx179h9mfdv4zywx2ias2jmkygvs834-recutils-1.8
guile-readline	3.0.2	out	/gnu/store/va6l1ivclww22fi38w5h99pb4ndn99hg-guile-readline-3.0.2
gtypist	2.9.5	out	/gnu/store/03wd707lyz49f2r14cm9ybyzh7vfvi0j-gtypist-2.9.5
scsh	0.0.0-1.1144324	out	/gnu/store/57frd08q6gyd7ysq3aqwlxxmify3w53h-scsh-0.0.0-1.1144324
make	4.3	out	/gnu/store/4k33n2nhsnnaxk2ip75gj7xiqdjns5hq-make-4.3
isync	1.3.3	out	/gnu/store/745qmx9mmnwq0j3zrd50qcdd2bgv5clz-isync-1.3.3
jmacs	27.1	out	/gnu/store/0hqdddkvhi2acxjdssdi5as3wj6cgvnz-jmacs-27.1
glibc-locales	2.31	out	/gnu/store/x9c4dk4zc9mi5j9hm3lq1q539kkdhkln-glibc-locales-2.31
guile	3.0.4	out	/gnu/store/ah16zr8mmfkqy23rr7jy5a842ca1q9h1-guile-3.0.4
guile-json	4.3.2	out	/gnu/store/12y1s0p3585ydf336gq85kjh5217pnzp-guile-json-4.3.2
guile-syntax-highlight	0.1	out	/gnu/store/dwjqscckpypqfq38hc97x5ipc9fplpp9-guile-syntax-highlight-0.1
haunt	0.2.4	out	/gnu/store/ccvqa9a6yclgkpi9izhpgf1vgjaghqvr-haunt-0.2.4
gnutls	3.6.14	out	/gnu/store/0f6agk6xk8rcz99907d39nd1vzmc4abq-gnutls-3.6.14
wget	1.20.3	out	/gnu/store/d7b16jqrgb1jz65hl7vnz261dbxmjh3s-wget-1.20.3
gnupg	2.2.23	out	/gnu/store/89cjqnar4aacg58wl6cm1h41rym9mv4l-gnupg-2.2.23
sassc	3.6.1	out	/gnu/store/6pqn2i0r12ypss13mdvsypskkcpaagji-sassc-3.6.1
qterminal	0.15.0	out	/gnu/store/y7qrfa78y785xfajb3gvvhwcm2d02l81-qterminal-0.15.0
dmenu	5.0	out	/gnu/store/393frjc5xjaab6nvp3wxpajb1rc6gynr-dmenu-5.0
openssh	8.4p1	out	/gnu/store/k8lnv9cqk6m15k18hhzg7w696r1vxx1v-openssh-8.4p1
grim	1.3.1	out	/gnu/store/9v5i9q7kwcmq1q31qri0icjkhh3csh9r-grim-1.3.1
evince	3.36.5	out	/gnu/store/arwvpbrzsch4w6afkpqln6625dfl0bz8-evince-3.36.5
pulseaudio	13.0	out	/gnu/store/19wcjfwdr3hzq1a4wcpld1zdrjichck0-pulseaudio-13.0
libreoffice	6.4.6.2	out	/gnu/store/7rbk52nzqmakd5whds5a6f07xrd2k870-libreoffice-6.4.6.2
termite	15	out	/gnu/store/8lqfy0mxqnq3xg24gwsxvzpxnvv6firh-termite-15
mpv	0.32.0	out	/gnu/store/2i2gzn7fa8qq0f1jkqhiyl0xw63fjr4w-mpv-0.32.0
pinentry	1.1.0	out	/gnu/store/bdsk9yq48lx1f7y7xr9sv4yrmm4ync9b-pinentry-1.1.0
glib	2.62.6	doc	/gnu/store/ql2226knbh4q04bbdiqcppvs5rjyl3ga-glib-2.62.6-doc
pidgin	2.13.0	out	/gnu/store/fd06njmc5maid7b474v224iazy7bc20h-pidgin-2.13.0
gimp	2.10.20	out	/gnu/store/m397hvwhsd0l6v5d0vqxxkm4iyp0p9w3-gimp-2.10.20
sway	1.4	out	/gnu/store/27ggd92in0hpgmkgk79n2iy4angjxwvl-sway-1.4
wf-recorder	0.2.1	out	/gnu/store/glc6y75l4czpfyrgbrbgxg38ig004v1p-wf-recorder-0.2.1
wofi	1.1.2	out	/gnu/store/qaylx0k6wg3awsamn2rqr41q9c8iwypg-wofi-1.1.2
linphoneqt	4.1.1	out	/gnu/store/wlcviacpagxqnw1737x131if0fj7kzjv-linphoneqt-4.1.1
qbittorrent	4.2.5	out	/gnu/store/29cjbdmz809pdvmylbx307l2p7zv0ma9-qbittorrent-4.2.5
pavucontrol	4.0	out	/gnu/store/0ilm4lncr6gpg4h3zdvaxg1pibkm6934-pavucontrol-4.0
git	2.28.0	send-email	/gnu/store/g5x559qk5yxs19jcxqplqv8b9y32vak2-git-2.28.0-send-email
flatpak	1.8.2	out	/gnu/store/ywfsnccvlr0j6afb5vnl3z4ismvcfbz6-flatpak-1.8.2
xdg-desktop-portal	1.7.2	out	/gnu/store/jkjx5dd7s3dp58p2hwsm8n2rm15z90ys-xdg-desktop-portal-1.7.2
xdg-desktop-portal-gtk	1.7.1	out	/gnu/store/zhssisyp66vggjnqi5y8nb1xnk55vnw1-xdg-desktop-portal-gtk-1.7.1
xeyes	1.1.2	out	/gnu/store/4jx8i19xd94d421n4acy2c1p0nn9h6d0-xeyes-1.1.2
emacs-polymode	0.2	out	/gnu/store/gmm1y1xahg44yw9ghsf0kwd40w86q7mf-emacs-polymode-0.2
notmuch	0.31	out	/gnu/store/0js5dwj8nxj0x0hxfllgzz4zxlsmyrz4-notmuch-0.31
msmtp	1.8.12	out	/gnu/store/s1g4nskvnsx9ww0032xg23548h7mnwvq-msmtp-1.8.12
youtube-viewer	3.7.9	out	/gnu/store/jm7q53lpda3a4rs2z7xv7cgig7adpncb-youtube-viewer-3.7.9
guile-curl	0.6	out	/gnu/store/9nnclxjxakwx9yc381arqrk1nhld21b5-guile-curl-0.6
qemu	5.1.0	out	/gnu/store/qzi36f60d2zlrdj9mg6b5y4i00w1fzfq-qemu-5.1.0
icecat	78.3.1-guix0-preview1	out	/gnu/store/71fkykdajhkshsvzwrnqm4lsc6qgycg2-icecat-78.3.1-guix0-preview1
git	2.28.0	out	/gnu/store/j66k3x1wz0bc6nh09dwa6i4jwahqcabi-git-2.28.0
guix	1.1.0-29.4e3ed9b	out	/gnu/store/irirj169rncank4y7i6n8qyiiqbs76qr-guix-1.1.0-29.4e3ed9b
ffmpeg	4.3.1	out	/gnu/store/sg4yq9i0v1lphvs1vx33dw9mn801adrd-ffmpeg-4.3.1
pavucontrol-qt	0.15.0	out	/gnu/store/9d0zp4wps5kpbqsl4yvjb96spb5xwz9b-pavucontrol-qt-0.15.0
clementine	1.3.1-2.4619a4c	out	/gnu/store/5392fysgmmi2jmn98maz9ihzn9ahzhw9-clementine-1.3.1-2.4619a4c
mako	1.4	out	/gnu/store/k83v9wz6szf6k2p2sz1amvwqm687j3h2-mako-1.4
ungoogled-chromium	86.0.4240.75-0.c34a56d	out	/gnu/store/m0s9mrbirbssis5nn9agx8k4sl2ck0y9-ungoogled-chromium-86.0.4240.75-0.c34a56d
#+end_example


Thanks,

--
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar




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Subject: bug#44053: =?UTF-8?Q?=E2=80=98xdg-mime-database=E2=80=99?= profile hook is slow
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=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original Me=
ssage =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90
On Tuesday, October 27, 2020 11:14 PM, Joshua Branson <jbranso@HIDDEN> =
wrote:

[...]

>
> #+BEGIN_SRC sh :results output :exports both
> time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~=
/.guix-profile)) |grep xdg-mime-database.drv)
> #+END_SRC


I haven't run this command because I don't know what it does (how will it a=
ffect my profile?), but if you think the results from this command would be=
 more useful than what I posted to issue #44053, please let me know and I'l=
l run it.




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severity 44053 important
quit





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Subject: bug#44053: =?UTF-8?Q?=E2=80=98xdg-mime-database=E2=80=99?= profile hook is slow
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
References: <87o8l7pple.fsf@HIDDEN>
 <sqv1qTRO4PZuOuanFOc1Dw6QlIMeczAQjg9erpoU9CmuWjuqYl7H87lpEfl7w2zNAT755yE_djMRXz8fKFiXZ8ddUJSdtLkSCoWIl9KREnw=@protonmail.com>
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Date: Mon, 02 Nov 2020 12:12:40 +0100
In-Reply-To: <87ft5zqn2a.fsf@HIDDEN> (Joshua Branson's message of "Tue, 27
 Oct 2020 19:14:05 -0400")
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Hi,

Joshua Branson <jbranso@HIDDEN> skribis:

> The "XDG MIME database" takes a while.
>
> #+BEGIN_SRC sh :results output :exports both
> time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~=
/.guix-profile)) |grep xdg-mime-database.drv)
> #+END_SRC
>
>
> #+RESULTS:
> : The following profile hook will be built:
> :    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
> : building XDG MIME database...
> : successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime=
-database.drv
> : successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime=
-database.drv
> : /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
> :
> : real	0m43.716s
> : user	0m3.626s
> : sys	0m0.258s

I found that the MIME database is computed only over the subset of the
packages in your profile that provide =E2=80=98share/mime/packages=E2=80=99=
, plus
=E2=80=98shared-mime-info=E2=80=99.

In my profile, only LibreOffice provides that directory, so the union is
made over these two directories and that=E2=80=99s what =E2=80=98update-mim=
e-database=E2=80=99
works on.

Apart from LibreOffice, I found that =E2=80=98share/mime/packages=E2=80=99 =
is provided
by at least: hugin, gcr, fontforge.  Most GUI packages don=E2=80=99t have i=
t.
So in practice, we=E2=80=99re often rebuilding the exact same database.

Here=E2=80=99s the time taken by =E2=80=98update-mime-database=E2=80=99 alo=
ne:

--8<---------------cut here---------------start------------->8---
ludo@ribbon ~$ mkdir -p /tmp/mime/share/mime/packages
ludo@ribbon ~$ cd /tmp/mime/share/mime/packages
ludo@ribbon /tmp/mime/share/mime/packages$ for i in $(guix build libreoffic=
e ^C
ludo@ribbon /tmp/mime/share/mime/packages$ for i in ~/.guix-profile/share/m=
ime/packages/* ; do ln -s $i ; done
ludo@ribbon /tmp/mime/share/mime/packages$ ls -l
totalo 8
lrwxrwxrwx 1 ludo users 64 Nov  2 11:46 freedesktop.org.xml -> /home/ludo/.=
guix-profile/share/mime/packages/freedesktop.org.xml
lrwxrwxrwx 1 ludo users 60 Nov  2 11:46 libreoffice.xml -> /home/ludo/.guix=
-profile/share/mime/packages/libreoffice.xml
ludo@ribbon /tmp/mime/share/mime/packages$ cd /tmp/mime/
ludo@ribbon /tmp/mime$ time update-mime-database -V /tmp/mime/share/mime
Updating MIME database in /tmp/mime/share/mime...

Parsing source file /tmp/mime/share/mime/packages/freedesktop.org.xml...
Parsing source file /tmp/mime/share/mime/packages/libreoffice.xml...
Wrote 1124 strings at 2c - 6310
Wrote aliases at 6310 - 6be4
Wrote parents at 6be4 - 8468
Wrote literal globs at 8468 - 855c
Wrote suffix globs at 855c - 13514
Wrote full globs at 13514 - 13554
Wrote magic at 13554 - 2065c
Wrote namespace list at 2065c - 20798
Wrote icons list at 20798 - 2079c
Wrote generic icons list at 2079c - 213b8
Wrote types list at 213b8 - 22020

Note that '/tmp/mime/share' is not in the search path
set by the XDG_DATA_HOME and XDG_DATA_DIRS
environment variables, so applications may not
be able to find it until you set them. The
directories currently searched are:

- /home/ludo/.local/share
- /home/ludo/.guix-profile/share
- /run/current-system/profile/share
- /home/ludo/.guix-profile/share
- /run/current-system/profile/share


real    0m2.166s
user    0m0.278s
sys     0m0.056s
--8<---------------cut here---------------end--------------->8---

To be compared with:

--8<---------------cut here---------------start------------->8---
$ drv=3D"$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) =
|grep xdg-mime-database.drv)"
$ time guix build --check $drv
The following profile hook will be built:
   /gnu/store/jrmwsxpz3wmq37zx29lvb0r9nvcmdviz-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/jrmwsxpz3wmq37zx29lvb0r9nvcmdviz-xdg-mime-dat=
abase.drv
/gnu/store/npvj2sr9kxx48znh7zc8zmzwzs6brc90-xdg-mime-database

real    0m3.670s
user    0m1.428s
sys     0m0.029s
--8<---------------cut here---------------end--------------->8---

Thus, the build time itself is entirely taken by =E2=80=98update-mime-datab=
ase=E2=80=99
(the 1.4s above is =E2=80=9Coverhead=E2=80=9D in =E2=80=98guix build=E2=80=
=99 it would seem).

Ludo=E2=80=99.




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Date: Mon, 02 Nov 2020 13:53:18 +0100
In-Reply-To: <87sg9sm2qf.fsf@HIDDEN> ("Ludovic =?UTF-8?Q?Court=C3=A8s?="'s message of "Mon, 02 Nov 2020 12:12:40 +0100")
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:

> Apart from LibreOffice, I found that =E2=80=98share/mime/packages=E2=80=
=99 is provided
> by at least: hugin, gcr, fontforge.  Most GUI packages don=E2=80=99t have=
 it.
> So in practice, we=E2=80=99re often rebuilding the exact same database.

On closer inspection, the time-consuming bit is processing
=E2=80=98share/mime/packages/freedesktop.org.xml=E2=80=99 (from =E2=80=98sh=
ared-mime-info=E2=80=99),
which is quite large and leads to the creation of hundreds of file.  We
end up re-processing it every time.  This is particularly wasteful
because the =E2=80=98shared-mime-info=E2=80=99 package already contains the=
 result of
applying =E2=80=98update-mime-database=E2=80=99 to itself.

Unfortunately, AIUI,

  update-mime-database(X =E2=88=AA Y) =E2=89=A0 update-mime-database(X) =E2=
=88=AA update-mime-database(Y)

(For example, the files
=E2=80=98share/mime/{globs,magic,XMLnamespaces,subclasses,aliases,types,gen=
eric-icons,icons,treemagic,mime.cache}=E2=80=99
concatenate info from X and Y.)

So it would seem we cannot simply used the pre-built database from
=E2=80=98shared-mime-info=E2=80=99 and merge it with that of the other pack=
ages, at
least not without changing =E2=80=98update-mime-database=E2=80=99 or re-imp=
lementing
parts of it on our side.

Ludo=E2=80=99.




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Date: Mon, 02 Nov 2020 15:04:14 +0100
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:

> Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
>
>> Apart from LibreOffice, I found that =E2=80=98share/mime/packages=E2=80=
=99 is provided
>> by at least: hugin, gcr, fontforge.  Most GUI packages don=E2=80=99t hav=
e it.
>> So in practice, we=E2=80=99re often rebuilding the exact same database.
>
> On closer inspection, the time-consuming bit is processing
> =E2=80=98share/mime/packages/freedesktop.org.xml=E2=80=99 (from =E2=80=98=
shared-mime-info=E2=80=99),
> which is quite large and leads to the creation of hundreds of file.  We
> end up re-processing it every time.  This is particularly wasteful
> because the =E2=80=98shared-mime-info=E2=80=99 package already contains t=
he result of
> applying =E2=80=98update-mime-database=E2=80=99 to itself.

Based on these observations, I added a fast path to the
=E2=80=98xdg-mime-database=E2=80=99 hook:

  https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3D76ea70bd70aeb7657=
0445c11cea2f98139192b54

It=E2=80=99s down to 0s in the common case where the profile doesn=E2=80=99=
t contain any
packages providing =E2=80=98share/mime/packages=E2=80=99.

Ludo=E2=80=99.




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Date: Wed, 04 Nov 2020 00:32:39 +0100
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Hi,

>   https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3D76ea70bd70aeb76=
570445c11cea2f98139192b54

Clever workaround!  What are now the performances on previous examples
(same profiles and same packages)?


> Unfortunately, AIUI,
>
>   update-mime-database(X =E2=88=AA Y) =E2=89=A0 update-mime-database(X) =
=E2=88=AA update-mime-database(Y)

Hum?  Interesting=E2=80=A6 well weird!  If it is not a =E2=80=9Cmorphism=E2=
=80=9D then it is not
really an updater.  Anyway.

I am curious about the comparison:

   time(update-mime-database(X =E2=88=AA Y))
vs
   time(update-mime-database(X)) + time(update-mime-database(Y))
vs
   time(update-mime-database(X =E2=88=A9 Y))


> So it would seem we cannot simply used the pre-built database from
> =E2=80=98shared-mime-info=E2=80=99 and merge it with that of the other pa=
ckages, at
> least not without changing =E2=80=98update-mime-database=E2=80=99 or re-i=
mplementing
> parts of it on our side.

=E2=80=99shared-mime-info=E2=80=99 is simply a package, right?  So what doe=
s it means:
=C2=ABFind a way to avoid reprocessing 'shared-mime-info'=C2=BB in:

--8<---------------cut here---------------start------------->8---
                 ;; the database.  TODO: Find a way to avoid reprocessing
                 ;; 'shared-mime-info', which is the most expensive one.
[...]
                 (invoke #+(file-append shared-mime-info
                                        "/bin/update-mime-database")
                         destdir)))))))
--8<---------------cut here---------------end--------------->8---

?  Well, I miss why and how =E2=80=99shared-mime-info=E2=80=99 could be the=
 culprit here
or what could be improved with =E2=80=9Cshared-mime-info=E2=80=9D?  Maybe r=
eplace the
=E2=80=9Clazy reference=E2=80=9D by a strict one if it makes sense.


All the best,
simon




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=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original Me=
ssage =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90
On Tuesday, November 3, 2020 11:32 PM, zimoun <zimon.toutoune@HIDDEN> wr=
ote:

> Hi,
>
> > https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3D76ea70bd70aeb76=
570445c11cea2f98139192b54
>
> Clever workaround! What are now the performances on previous examples
> (same profiles and same packages)?

In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930ad=
0bc5fe21ac330df4411d).


$ time guix package -i perl --max-jobs=3D1
Se instalar=C3=A1 el siguiente paquete:
   perl 5.30.2

Se construir=C3=A1 la siguiente derivaci=C3=B3n:
   /gnu/store/48imlmfi2hjmp4ksyidvy99c31ahj44z-profile.drv

Se descargar=C3=A1n 0,6 MB
construyendo empaquetado de certificados de CA...
descargando de https://ci.guix.gnu.org/nar/lzip/j3f5hx6yvhlj3sapiipigkwg05b=
49nwn-freetype-2.10.4 ...
 freetype-2.10.4  555KiB                                       707KiB/s 00:=
01 [##################] 100.0%

injertando 5 paquetes en /gnu/store/s4s7xzswar962p9w1nvf0hfcgmnxyfsh-at-spi=
2-core-2.34.0.drv ...
injertando 1 paquete en /gnu/store/80n340f7bnba0ivp00z10a32rz8g8wsx-fontcon=
fig-2.13.1.drv ...
injertando 4 paquetes en /gnu/store/hm3a895l251mckzb9bhiglcwfb6xli5n-at-spi=
2-atk-2.34.1.drv ...
injertando 6 paquetes en /gnu/store/9vwl8s2h7rbfhvimsarzc1q4gnclwpk2-cairo-=
1.16.0.drv ...
injertando 6 paquetes en /gnu/store/k6gajkzfq4drpcrimbwxk1ls0h7z1nzw-cairo-=
1.16.0.drv ...
injertando 4 paquetes en /gnu/store/klq5sp427s80d0mhz3b5x48xpmhf3ila-gdk-pi=
xbuf-2.40.0.drv ...
injertando 5 paquetes en /gnu/store/ijkpcwanfpj02i0rxk4ys0kfdpj6sz69-ghosts=
cript-with-cups-9.52.drv ...
generando la cach=C3=A9 de esquemas de GLib...
injertando 2 paquetes en /gnu/store/kg8ca3wz01ibhbm5wk707r44jjnrxdg1-harfbu=
zz-2.6.4.drv ...
construyendo el directorio de manuales Info...
injertando 4 paquetes en /gnu/store/97bgi57qs077pcqggvr7di0vhchlshk2-libxft=
-2.3.3.drv ...
construyendo la base de datos de p=C3=A1ginas de manual...
injertando 1 paquete en /gnu/store/gb85hxzczf4m0crzwqpw2imxpr1d67nx-mkfonts=
cale-1.2.1.drv ...
injertando 9 paquetes en /gnu/store/ddiqkw9r0p1lhvqmdlcyrzf8v900pm4r-pango-=
1.42.4.drv ...
injertando 1 paquete en /gnu/store/xd0ca96gvh3vn9bp3bcmczczcxm0bynd-mkfontd=
ir-1.0.7.drv ...
injertando 11 paquetes en /gnu/store/s53s5qx304b90l0dp734lqi42whwd0vd-librs=
vg-2.40.21.drv ...
construyendo el directorio de tipograf=C3=ADas...
injertando 5 paquetes en /gnu/store/qg628jlnjmiyv964c0i4s7bbkwy32c6c-gdk-pi=
xbuf+svg-2.40.0.drv ...
injertando 8 paquetes en /gnu/store/1mj8cjf43nqd9r5151lqrf1sdd1sjg16-pango-=
1.44.7.drv ...
injertando 8 paquetes en /gnu/store/d42vnhn9grcsyiibdgkiryqb7rxhb89j-popple=
r-0.86.1.drv ...
construyendo la cach=C3=A9 de ficheros desktop XDG...
injertando 12 paquetes en /gnu/store/anknpdyhmfirw3rz2k9zm9kiyak8yy1s-cups-=
filters-1.27.4.drv ...
construyendo la base de datos MIME XDG...
injertando 3 paquetes en /gnu/store/xgny7xbl635g8na8x03x4cdr7abiphiw-cups-2=
.3.3.drv ...
injertando 20 paquetes en /gnu/store/yhjl68x7kcjbv40v823x4hl8rvv8l50b-gtk+-=
2.24.32.drv ...
injertando 21 paquetes en /gnu/store/kq37fnw8335f1hqc3j4hhqqcdnhl371p-gtk+-=
3.24.20.drv ...
creando la cach=C3=A9 de temas de iconos de GTK+...
construyendo los ficheros de cach=C3=A9 para los m=C3=A9todos de entrada de=
 GTK+...
construyendo perfil con 86 paquetes...


real=098m38,121s
user=090m2,742s
sys=090m0,338s




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From: zimoun <zimon.toutoune@HIDDEN>
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Date: Thu, 05 Nov 2020 17:10:39 +0100
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Hi,

On Thu, 05 Nov 2020 at 14:47, Luis Felipe <luis.felipe.la@HIDDEN> w=
rote:

>> Clever workaround! What are now the performances on previous examples
>> (same profiles and same packages)?
>
> In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930=
ad0bc5fe21ac330df4411d).
>
>
> $ time guix package -i perl --max-jobs=3D1

[...]

> real	8m38,121s
> user	0m2,742s
> sys	0m0,338s

Thanks.  But it is hard to conclude because the previous timing is
missing.  The right experiment should be:

--8<---------------cut here---------------start------------->8---
old=3Dc73496f433044a76003b33c3855bb35ecd0df87f
new=3D5e7cf66fb35780f930ad0bc5fe21ac330df4411d
guix time-machine --commit=3D$old -- help
guix time-machine --commit=3D$new -- help

drv=3D$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |gr=
ep xdg-mime-database.drv)

guix package -I |wc -l
time guix time-machine --commit=3D$old -- build --check $drv
time guix time-machine --commit=3D$new -- build --check $drv
--8<---------------cut here---------------end--------------->8---


And personally, I get:

18

Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.or=
g/git/guix.git'...
The following profile hook will be built:
   /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-dat=
abase.drv
/gnu/store/hrcj1h0hl9f6hm1akh682zj1mhpwbx4c-xdg-mime-database

real	0m8.063s
user	0m6.226s
sys	0m0.282s

Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.or=
g/git/guix.git'...
The following profile hook will be built:
   /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-dat=
abase.drv
/gnu/store/hrcj1h0hl9f6hm1akh682zj1mhpwbx4c-xdg-mime-database

real	0m8.016s
user	0m6.223s
sys	0m0.243s

Well, I have only 18 packages in my ~/.guix-profile.  That=E2=80=99s why the
difference is not visible and the =E2=80=9Ctime-machine=E2=80=9D is totally=
 dominating
here.


All the best,
simon




Message sent to bug-guix@HIDDEN:


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=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original Me=
ssage =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90
On Thursday, November 5, 2020 4:10 PM, zimoun <zimon.toutoune@HIDDEN> wr=
ote:

> Hi,
>
> On Thu, 05 Nov 2020 at 14:47, Luis Felipe luis.felipe.la@HIDDEN w=
rote:
>
> > > Clever workaround! What are now the performances on previous examples
> > > (same profiles and same packages)?
> >
> > In my case there seem to be no improvement (using Guix 5e7cf66fb35780f9=
30ad0bc5fe21ac330df4411d).
> > $ time guix package -i perl --max-jobs=3D1
>
> [...]
>
> > real 8m38,121s
> > user 0m2,742s
> > sys 0m0,338s
>
> Thanks. But it is hard to conclude because the previous timing is
> missing.

I don't understand, I posted my original timing in https://issues.guix.gnu.=
org/44053#1 .



> The right experiment should be:
>
> --8<---------------cut here---------------start------------->8---
> old=3Dc73496f433044a76003b33c3855bb35ecd0df87f
> new=3D5e7cf66fb35780f930ad0bc5fe21ac330df4411d
> guix time-machine --commit=3D$old -- help
> guix time-machine --commit=3D$new -- help
>
> drv=3D$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |=
grep xdg-mime-database.drv)
>
> guix package -I |wc -l
> time guix time-machine --commit=3D$old -- build --check $drv
> time guix time-machine --commit=3D$new -- build --check $drv
> --8<---------------cut here---------------end--------------->8---


I get this:

yo@gnu: ~=E2=9D=AF guix package -I |wc -l
85

yo@gnu: ~=E2=9D=AF time guix time-machine --commit=3D$old -- build --check =
$drv
Actualizando el canal 'guix' del repositorio Git en 'https://git.savannah.g=
nu.org/git/guix.git'...
Actualizando el canal 'luflac-x' del repositorio Git en 'git@HIDDEN:lui=
s-felipe/guix-channel-x.git'...
Se construir=C3=A1 la siguiente extensi=C3=B3n del perfil:
   /gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv
construyendo la base de datos MIME XDG...
/gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv construid=
o satisfactoriamente
/gnu/store/i4qslq2517pwkwb5dyivrg8idsjd8n11-xdg-mime-database

real=090m56,245s
user=090m4,324s
sys=090m0,218s


yo@gnu: ~=E2=9D=AF time guix time-machine --commit=3D$new -- build --check =
$drv
Actualizando el canal 'guix' del repositorio Git en 'https://git.savannah.g=
nu.org/git/guix.git'...
Actualizando el canal 'luflac-x' del repositorio Git en 'git@HIDDEN:lui=
s-felipe/guix-channel-x.git'...
Se construir=C3=A1 la siguiente extensi=C3=B3n del perfil:
   /gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv
construyendo la base de datos MIME XDG...
/gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv construid=
o satisfactoriamente
/gnu/store/i4qslq2517pwkwb5dyivrg8idsjd8n11-xdg-mime-database

real=090m43,272s
user=090m4,214s
sys=090m0,200s




Message sent to bug-guix@HIDDEN:


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Hi,

Luis Felipe <luis.felipe.la@HIDDEN> skribis:

> =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original =
Message =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90
> On Tuesday, November 3, 2020 11:32 PM, zimoun <zimon.toutoune@HIDDEN> =
wrote:
>
>> Hi,
>>
>> > https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3D76ea70bd70aeb7=
6570445c11cea2f98139192b54
>>
>> Clever workaround! What are now the performances on previous examples
>> (same profiles and same packages)?
>
> In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930=
ad0bc5fe21ac330df4411d).

Please note that the change above addresses only one specific source of
slowness, the =E2=80=98xdg-mime-database=E2=80=99 hook, and only in specifi=
c cases.

It=E2=80=99s good to look at the overall timing of =E2=80=98guix install=E2=
=80=99, because
that=E2=80=99s what matters in the end, but as we work on optimizing it, we=
 have
to look at specific aspects of it.

> $ time guix package -i perl --max-jobs=3D1

[...]

> injertando 12 paquetes en /gnu/store/anknpdyhmfirw3rz2k9zm9kiyak8yy1s-cup=
s-filters-1.27.4.drv ...
> construyendo la base de datos MIME XDG...
> injertando 3 paquetes en /gnu/store/xgny7xbl635g8na8x03x4cdr7abiphiw-cups=
-2.3.3.drv ...
> injertando 20 paquetes en /gnu/store/yhjl68x7kcjbv40v823x4hl8rvv8l50b-gtk=
+-2.24.32.drv ...
> injertando 21 paquetes en /gnu/store/kq37fnw8335f1hqc3j4hhqqcdnhl371p-gtk=
+-3.24.20.drv ...
> creando la cach=C3=A9 de temas de iconos de GTK+...
> construyendo los ficheros de cach=C3=A9 para los m=C3=A9todos de entrada =
de GTK+...
> construyendo perfil con 86 paquetes...
>
>
> real	8m38,121s
> user	0m2,742s
> sys	0m0,338s

Here it=E2=80=99s likely that grafting is what=E2=80=99s taking the most ti=
me on a
spinning disk.

We should hack (guix status) so it can optionally prefix each event with
a timestamp.

As far as =E2=80=98xdg-mime-database=E2=80=99 is concerned, it should be do=
wn to 0s,
unless your profile contains one of the packages I cited (libreoffice,
gcr, hugin, etc.).

Thanks,
Ludo=E2=80=99.




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Hello,

zimoun <zimon.toutoune@HIDDEN> skribis:

>> So it would seem we cannot simply used the pre-built database from
>> =E2=80=98shared-mime-info=E2=80=99 and merge it with that of the other p=
ackages, at
>> least not without changing =E2=80=98update-mime-database=E2=80=99 or re-=
implementing
>> parts of it on our side.
>
> =E2=80=99shared-mime-info=E2=80=99 is simply a package, right?  So what d=
oes it means:
> =C2=ABFind a way to avoid reprocessing 'shared-mime-info'=C2=BB in:
>
>                  ;; the database.  TODO: Find a way to avoid reprocessing
>                  ;; 'shared-mime-info', which is the most expensive one.
> [...]
>                  (invoke #+(file-append shared-mime-info
>                                         "/bin/update-mime-database")
>                          destdir)))))))

=E2=80=98shared-mime-info=E2=80=99 contains =E2=80=98share/mime/freedesktop=
.org.xml=E2=80=99, which is
by far where =E2=80=98update-mime-database=E2=80=99 spends most of its time.

But it=E2=80=99s wasteful because =E2=80=98shared-mime-info=E2=80=99 alread=
y contains the result
of running =E2=80=98update-mime-database=E2=80=99 on itself.

HTH!

Ludo=E2=80=99.




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Hi,

On Thu, 05 Nov 2020 at 17:59, Luis Felipe <luis.felipe.la@HIDDEN> w=
rote:

Therefore, it is nice improvement! :-)

> real	0m56,245s
> user	0m4,324s
> sys	0m0,218s

> real	0m43,272s
> user	0m4,214s
> sys	0m0,200s

Because, I bet that most of the time is spent in the =E2=80=9Ctime-machine=
=E2=80=9D
part.  I mean, compare with:

 time guix time-machine --commit=3D$new -- help


All the best,
simon




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=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original Me=
ssage =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90
On Friday, November 6, 2020 9:10 AM, Ludovic Court=C3=A8s <ludo@HIDDEN> wr=
ote:

> Hi,
>
> Luis Felipe luis.felipe.la@HIDDEN skribis:
>
> > =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Origina=
l Message =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=
=90
> > On Tuesday, November 3, 2020 11:32 PM, zimoun zimon.toutoune@HIDDEN =
wrote:
> >
> > > Hi,
> > >
> > > > https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3D76ea70bd70a=
eb76570445c11cea2f98139192b54
> > >
> > > Clever workaround! What are now the performances on previous examples
> > > (same profiles and same packages)?
> >
> > In my case there seem to be no improvement (using Guix 5e7cf66fb35780f9=
30ad0bc5fe21ac330df4411d).
>
> Please note that the change above addresses only one specific source of
> slowness, the =E2=80=98xdg-mime-database=E2=80=99 hook, and only in speci=
fic cases.
>
> It=E2=80=99s good to look at the overall timing of =E2=80=98guix install=
=E2=80=99, because
> that=E2=80=99s what matters in the end, but as we work on optimizing it, =
we have
> to look at specific aspects of it.
>
> > $ time guix package -i perl --max-jobs=3D1


Yeah, sorry I was more focused on the general issue (#44053), but I underst=
and.


> [...]
>
> > injertando 12 paquetes en /gnu/store/anknpdyhmfirw3rz2k9zm9kiyak8yy1s-c=
ups-filters-1.27.4.drv ...
> > construyendo la base de datos MIME XDG...
> > injertando 3 paquetes en /gnu/store/xgny7xbl635g8na8x03x4cdr7abiphiw-cu=
ps-2.3.3.drv ...
> > injertando 20 paquetes en /gnu/store/yhjl68x7kcjbv40v823x4hl8rvv8l50b-g=
tk+-2.24.32.drv ...
> > injertando 21 paquetes en /gnu/store/kq37fnw8335f1hqc3j4hhqqcdnhl371p-g=
tk+-3.24.20.drv ...
> > creando la cach=C3=A9 de temas de iconos de GTK+...
> > construyendo los ficheros de cach=C3=A9 para los m=C3=A9todos de entrad=
a de GTK+...
> > construyendo perfil con 86 paquetes...
> > real 8m38,121s
> > user 0m2,742s
> > sys 0m0,338s
>
> Here it=E2=80=99s likely that grafting is what=E2=80=99s taking the most =
time on a
> spinning disk.

It does take some time, but since I can see the output change from grafting=
 to grafting, I at least can tell guix is doing something, so I just let it=
 be.

Compared to grafting, the last step "construyendo perfil con X paquetes..."=
 ("building profile with X packages..."), just stays there without change f=
or several minutes, so it actually seems slower to me. Initially, I thought=
 that guix had frozen.

Also, even though, the "building profile" step has a throbber (| / - \) to =
indicate that something is being done, it frequently stops in one of the fr=
ames of the sequence and stays there until the end.


> We should hack (guix status) so it can optionally prefix each event with
> a timestamp.
>
> As far as =E2=80=98xdg-mime-database=E2=80=99 is concerned, it should be =
down to 0s,
> unless your profile contains one of the packages I cited (libreoffice,
> gcr, hugin, etc.).

Yes, I have Libreoffice installed.






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Hi,

Luis Felipe <luis.felipe.la@HIDDEN> skribis:

> Compared to grafting, the last step "construyendo perfil con X paquetes..=
." ("building profile with X packages..."), just stays there without change=
 for several minutes, so it actually seems slower to me. Initially, I thoug=
ht that guix had frozen.
>
> Also, even though, the "building profile" step has a throbber (| / - \) t=
o indicate that something is being done, it frequently stops in one of the =
frames of the sequence and stays there until the end.

Interesting, so we should profile that step and see what can be done.  I
suspect it=E2=80=99s I/O-bound, but maybe we can at least improve feedback.

Thanks,
Ludo=E2=80=99.




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Hi Maxim,

About performance reported by [1],

1: <http://issues.guix.gnu.org/issue/44053>

the commit [2],

2: <https://git.savannah.gnu.org/cgit/guix.git/commit/?id=76ea70bd70aeb76570445c11cea2f98139192b54>

improves the situation.  Although I agree the performance are poor for
spinning disk, what is the next actionable step associated to this
report?

Maybe we can close, WDYT?


Cheers,
simon




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Hi Simon,

zimoun <zimon.toutoune@HIDDEN> writes:

> Hi Maxim,
>
> About performance reported by [1],
>
> 1: <http://issues.guix.gnu.org/issue/44053>
>
> the commit [2],
>
> 2: <https://git.savannah.gnu.org/cgit/guix.git/commit/?id=76ea70bd70aeb76570445c11cea2f98139192b54>
>
> improves the situation.  Although I agree the performance are poor for
> spinning disk, what is the next actionable step associated to this
> report?
>
> Maybe we can close, WDYT?

This issue is more about the time it takes to generate the file
hierarchy of the profile, rather than with the profile hooks.  The
profile hooks should be tolerably fast at this point.

There is perhaps more optimization that can be done at the level of
populating the symbolic links of a profile, so I'd like to leave this
open until someone gets around to profiling what is slow and whether
something more can be done.

Thanks,

Maxim




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Hi Maxim,

On Wed, 23 Mar 2022 at 17:17, Maxim Cournoyer <maxim.cournoyer@HIDDEN> wrote:

> This issue is more about the time it takes to generate the file
> hierarchy of the profile, rather than with the profile hooks.  The
> profile hooks should be tolerably fast at this point.

Yeah, I have seen your profiling about man-db, cool!

> There is perhaps more optimization that can be done at the level of
> populating the symbolic links of a profile, so I'd like to leave this
> open until someone gets around to profiling what is slow and whether
> something more can be done.

Ok.  So we need to provide a "configuration".  For instance, a typical
manifest and Guix revision to compare with.  WDYT?


Cheers,
simon




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Shall we go ahead and close this bug report?

I do not recall a recent time that someone complained about Guix System's=
 slow profile generation on hard drives. I currently use guix system on a=
n SSD...but I could install Guix on a Dell Optiplex 7010 on a hard drive =
to test if you all would like.

Thanks,

Joshua

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per=3D"true" style=3D"font-family: arial, sans-serif; font-size: 13px;"><=
br>Shall we go ahead and close this bug report?<br><br>I do not recall a =
recent time that someone complained about Guix System's slow profile gene=
ration on hard drives. I currently use guix system on an SSD...but I coul=
d install Guix on a Dell Optiplex 7010 on a hard drive to test if you all=
 would like.<br><br>Thanks,<br><br>Joshua</div></body></html>

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Hi,

On Saturday, August 26th, 2023 at 22:11, jbranso@HIDDEN <jbranso@disma=
il.de> wrote:

> =


> Shall we go ahead and close this bug report?

I'm okay with that.


> I do not recall a recent time that someone complained about Guix System'=
s slow profile generation on hard drives. I currently use guix system on a=
n SSD...but I could install Guix on a Dell Optiplex 7010 on a hard drive t=
o test if you all would like.

I still use the same computer with the same hard drive, and performance ha=
s improved when installing packages. Running

  $ time guix package -i perl --max-jobs=3D1

initially took

  (87 packages in profile)
  real    8m3,043s
  user    0m2,656s
  sys    0m0,239s

But now (guix 17fadbb), it takes

  (96 packages in profile)
  real	3m51,058s
  user	0m7,490s
  sys	0m0,788s

Whether that's acceptable or not when using spinning disks, I don't know. =
I'll step aside :)
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Date: Mon, 28 Aug 2023 14:52:50 +0200
Message-Id: <87r0nnpbvh.fsf@HIDDEN>
To: control <at> debbugs.gnu.org
From: Simon Tournier <zimon.toutoune@HIDDEN>
Subject: control message for bug #44053
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 Content preview:  severity 44053 normal quit 
 Content analysis details:   (1.1 points, 10.0 required)
 pts rule name              description
 ---- ---------------------- --------------------------------------------------
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 no trust [2a00:1450:4864:20:0:0:0:435 listed in]
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severity 44053 normal
quit






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Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.