[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2021-01-17 Thread Craig Langman
Thanks much @~s-chriscollins!  For me that setting in virtualbox was it.

When I started reading this thread and see similar issues since 2012 I
wasnt very optimistic... but 7 years later you provide a solution!  I
don't understand if it's a problem in virtualbox or problem with dkpg,
but this is great.  I was using hwe in ubuntu 18 based VM and every
friggen time I use it there seems to be a kerel update, and waiting an
hour each time was ridiculous, thank you so much for posting this, back
to a a couple minutes for updates like it should be.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2020-11-14 Thread funicorn
I encountered the same problem in Ubuntu 20.04 and 20.10. This
fundamental dpkg deficit has been there for 8 years! How ridiculous a
system like this!

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2020-08-12 Thread Anton Pivovarov
I've also encountered problem recently.
I'm installing headers 4.15.0-112.113. Progress is stuck on unpacking stage at 
4%. I've tried clearing cache but this didn't seem to help. dpkg is disk sleep 
in htop.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2020-04-02 Thread Blake McBride
I tried it by comparing the same VM with and without that setting. Here
is what I found:

With "Use Host I/O Cache" disabled, booting took 40 seconds.

With "Use Host I/O Cache" enabled, booting took 12 seconds.


With "Use Host I/O Cache" disabled, doing a mini update took a few minutes.

With "Use Host I/O Cache" enabled, doing a mini update occurred nearly
instantaneously.

I'm convinced.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2019-09-30 Thread Roger
I think you are on to something here.
I will try this solution on next kernel update.

I also found some information why this setting is not turned on by default:
https://www.electricmonk.nl/log/2016/03/14/terrible-virtualbox-disk-performance/

I have also created an issue at the VirtualBox forum (Kernel updates in VM with 
Ubuntu 18.04 host (kernel 5.0.0.x) takes very very long time):
https://forums.virtualbox.org/viewtopic.php?f=7=94822=86f403dbb1ae5474d61565f11d33486c


/My regards from Sweden
Roger

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2019-09-27 Thread S. Christian Collins
Good news! I was able to work around the issue by enabling host I/O
cache in the virtual machine settings. Go to "Storage", select
"Controller: SATA", and enable "Use Host I/O Cache".

I'm not sure what changed in the Linux kernel to make this change
necessary, but I wonder if kernels earlier than 4.18 were using the file
cache even if the option was disabled in VirtualBox. Someone with a
better knowledge of the Linux Kernal and/or VirtualBox would need to
answer that question.

Hopefully this will solve the problem for others as well.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2019-09-19 Thread Roger
I have noticed this issue also S. Christian Collins.
I have an Ubuntu host running Ubuntu Budgie 18.04 with three different VMs - 
one Ubuntu 16.04, one Ubuntu Budgie 18.04 and one Ubuntu Budgie 19.04 (the last 
two are running Linux kernel 5.0).
Had no problems with kernel updates until three weeks ago when I had to 
reinstall the host machine.
After I reinstalled the host with Ubuntu Budgie 18.04.3 (with linux kernel 
5.0.0.x) I noticed that the kernel updates became very, very, very slow. I even 
got warnings about packages broken!
The original installation ran Ubuntu Budgie from release (18.04.01, kernel 
4.15).

Also, I noticed that the same Ubuntu Budgie 18.04.03 guest VirtualBox
installation took only 2 minutes to update on Windows 10 host from Linux
kernel 5.0.0.27 to 5.0.0.29.

One other comment is that I am using VirtualBox 6.0.10.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2019-09-04 Thread S. Christian Collins
Okay, so I have narrowed this down a bit. The issue is the kernel
version on the HOST system, not the GUEST. I tested this by installing
the package "linux-headers-5.0.0-23" on a Xubuntu 18.04 guest in
VirtualBox using two different kernels on the host PC. I used the
command "time sudo apt install linux-headers-5.0.0-23" to report the
total time for the process to complete. Here is how long the package
installation took when running on each host OS kernel, not counting
package download time (it was already in the apt cache):

Kernel 4.17.19-generic (and earlier): 20 seconds

Kernel 4.18-rc1-generic (and later): 8 minutes, 43 seconds

Using kernel 4.18 or later is almost 23 times slower! I have not been
able to find any possible reasons for this. I have already ruled out
differences in I/O schedulers. I can also confirm this issue on both of
my Linux systems, the details of which are listed below. Furthermore,
unpacking kernel headers on the HOST system only takes a few seconds,
and I haven't noticed any other regressions in hard disk performance.

** System #1 **
OS: KDE Neon 5.16 64-bit (Plasma Desktop 5.16.5, KDE Frameworks 5.61.0, Qt 
5.12.3)
Motherboard: ASRock X58 Extreme3 (Intel X58 chipset)
CPU: Intel Core i7-990x Bloomfield (3.46 GHz hexa-core, Socket 1366)
RAM: 12GB DDR3
Video: EVGA NVIDIA GeForce GTX 980 Ti SC (GAMING ACX 2.0+?) w/ 6GB RAM (PCI 
Express)
NVIDIA video driver: 430.40

** My System **
OS: KDE Neon 5.16 64-bit (Plasma Desktop 5.16.5, KDE Frameworks 5.60.0, Qt 
5.12.3)
PC: HP Pavilion m6-1035dx
CPU/GPU: AMD A10-4600M APU with Trinity [Radeon HD 7660G] Graphics (using xorg 
radeon driver)
RAM: 8GB DDR3 800 MHz

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2019-09-03 Thread S. Christian Collins
I am running into this bug in all of my Ubuntu (and variants) VirtualBox
VMs as well. I didn't notice this issue with vanilla 18.04 installs, but
only since upgrading the VMs to the hardware enablement stack, so
perhaps this bug only happens with the newer kernels?

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2019-03-26 Thread Sig Bee
" ali nagi (alin43958) on 2016-05-06
Changed in dpkg (Ubuntu):
status: Confirmed → Fix Released "

What was the fix?

I continue to have this same problem (various Linux versions on Xubuntu
18.04.2 hosts).

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2016-05-06 Thread ali nagi
** Changed in: dpkg (Ubuntu)
   Status: Confirmed => Fix Released

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2015-04-15 Thread Bazzilic
I am confirming this bug. Ubuntu Server 14.04.1 x64 running in
VirtualBox 4.3.26 (host OS is Windows). VM specs are 1024 MB RAM, 1 CPU
(out of 8 cores on Xeon CPU), hardware acceleration enabled.

Unpacking of linux headers takes on average 20-30 minutes.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2014-10-15 Thread Dan42
For the record, I used to have this problem and neither force-unsafe-
io nor nodelalloc nor discard option in fstab solved the problem.
Because... my problem was that I was using a very old SSD model that did
not even have TRIM. Every write required  an erase cycle and obviously
that killed performance. Problem fixed with a new SSD.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2014-05-21 Thread Ted
Anyone experiencing this issue may wish to try these and report back on
what, if any, differences they make:

- Use dpkg's force-unsafe-io.  Put force-unsafe-io in
/etc/dpkg/dpkg.cfg.d/unsafe_io

- If using ext4, mount with the nodelalloc option.  Either add it in
/etc/fstab or remount with 'mount / -o remount,nodelalloc,your other
usual options'

- Use libeatmydata
(https://www.flamingspork.com/projects/libeatmydata/), which is an
LD_PRELOAD library that will disable fsync() and related functions.

FYI, from the man page for dpkg:

  unsafe-io: Do not perform safe I/O operations when
unpacking. Currently this implies not performing file system syncs
before file renames, which is known to cause substantial performance
degradation on some file  systems, unfortunately the ones that require
the safe I/O on the first place due to their unreliable behaviour
causing zero-length files on abrupt system crashes.

  Note: For ext4, the main offender, consider using instead
the mount option nodelalloc, which will fix both the performance
degradation and the data safety issues, the latter by making the file
system not produce zero-length files on abrupt system crashes with any
software not doing syncs before atomic renames.

  Warning: Using this option might improve performance at
the cost of losing data, use with care.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2014-04-07 Thread yoyoq
so i just decided to grit my teeth and wait for the update to finish.
it slowly does make progress.
this is the ps output

root   757  0.5  0.2 109944 86956 pts/4Ds+  14:34   0:06
/usr/bin/dpkg --status-fd 59 --unpack --auto-deconfigure
/var/cache/apt/archives/libdevmapper1.02.1_2%3a1.02.48-4ubuntu7.4_amd64.deb
/var/cache/apt/archives/initramfs-tools_0.99ubuntu13.5_all.deb
/var/cache/apt/archives/initramfs-tools-bin_0.99ubuntu13.5_amd64.deb
/var/cache/apt/archives/dmsetup_2%3a1.02.48-4ubuntu7.4_amd64.deb
/var/cache/apt/archives/udev_175-0ubuntu9.5_amd64.deb
/var/cache/apt/archives/file_5.09-2ubuntu0.3_amd64.deb
/var/cache/apt/archives/libmagic1_5.09-2ubuntu0.3_amd64.deb
/var/cache/apt/archives/sudo_1.8.3p1-1ubuntu3.6_amd64.deb
/var/cache/apt/archives/xkb-data_2.5-1ubuntu1.5_all.deb
/var/cache/apt/archives/bind9-host_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/dnsutils_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/libisc83_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/libdns81_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/libisccc80_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/libisccfg82_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/liblwres80_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/libbind9-80_1%3a9.8.1.dfsg.P1-4ubuntu0.8_amd64.deb
/var/cache/apt/archives/openssh-server_1%3a5.9p1-5ubuntu1.2_amd64.deb
/var/cache/apt/archives/openssh-client_1%3a5.9p1-5ubuntu1.2_amd64.deb
/var/cache/apt/archives/python-apt-common_0.8.3ubuntu7.2_all.deb
/var/cache/apt/archives/python-apt_0.8.3ubuntu7.2_amd64.deb
/var/cache/apt/archives/gir1.2-gtk-3.0_3.4.2-0ubuntu0.7_amd64.deb
/var/cache/apt/archives/update-manager-core_1%3a0.156.14.12_amd64.deb
/var/cache/apt/archives/update-manager_1%3a0.156.14.12_all.deb
/var/cache/apt/archives/cups-filters_1.0.18-0ubuntu0.2_amd64.deb
/var/cache/apt/archives/firefox_28.0+build2-0ubuntu0.12.04.1_amd64.deb
/var/cache/apt/archives/firefox-
globalmenu_28.0+build2-0ubuntu0.12.04.1_amd64.deb
/var/cache/apt/archives/firefox-locale-
en_28.0+build2-0ubuntu0.12.04.1_amd64.deb
/var/cache/apt/archives/gir1.2-gudev-1.0_175-0ubuntu9.5_amd64.deb
/var/cache/apt/archives/printer-driver-postscript-
hp_3.12.2-1ubuntu3.4_all.deb /var/cache/apt/archives/printer-driver-
hpijs_3.12.2-1ubuntu3.4_amd64.deb /var/cache/apt/archives/libsane-
hpaio_3.12.2-1ubuntu3.4_amd64.deb
/var/cache/apt/archives/hplip_3.12.2-1ubuntu3.4_amd64.deb
/var/cache/apt/archives/libhpmud0_3.12.2-1ubuntu3.4_amd64.deb
/var/cache/apt/archives/hplip-data_3.12.2-1ubuntu3.4_all.deb
/var/cache/apt/archives/printer-driver-
hpcups_3.12.2-1ubuntu3.4_amd64.deb /var/cache/apt/archives/imagemagick-
common_8%3a6.6.9.7-5ubuntu3.3_all.deb
/var/cache/apt/archives/libmagickcore4_8%3a6.6.9.7-5ubuntu3.3_amd64.deb
/var/cache/apt/archives/libmagickwand4_8%3a6.6.9.7-5ubuntu3.3_amd64.deb
/var/cache/apt/archives/imagemagick_8%3a6.6.9.7-5ubuntu3.3_amd64.deb
/var/cache/apt/archives/jockey-gtk_0.9.7-0ubuntu7.14_all.deb
/var/cache/apt/archives/jockey-common_0.9.7-0ubuntu7.14_all.deb
/var/cache/apt/archives/libcdt4_2.26.3-10ubuntu1.1_amd64.deb
/var/cache/apt/archives/libdevmapper-
event1.02.1_2%3a1.02.48-4ubuntu7.4_amd64.deb /var/cache/apt/archives
/libgnome-bluetooth8_3.2.2-0ubuntu5.1_amd64.deb
/var/cache/apt/archives/libgraph4_2.26.3-10ubuntu1.1_amd64.deb
/var/cache/apt/archives/libpathplan4_2.26.3-10ubuntu1.1_amd64.deb
/var/cache/apt/archives/libgvc5_2.26.3-10ubuntu1.1_amd64.deb
/var/cache/apt/archives/liblightdm-
gobject-1-0_1.2.3-0ubuntu2.4_amd64.deb
/var/cache/apt/archives/liblvm2app2.2_2.02.66-4ubuntu7.4_amd64.deb
/var/cache/apt/archives/libmagickcore4-extra_8%3a6.6.9.7-5ubuntu3.3_amd64.deb
/var/cache/apt/archives/libnautilus-
extension1a_1%3a3.4.2-0ubuntu9_amd64.deb
/var/cache/apt/archives/libotr2_3.2.0-4ubuntu0.2_amd64.deb
/var/cache/apt/archives/libpurple-bin_1%3a2.10.3-0ubuntu1.4_all.deb
/var/cache/apt/archives/libpurple0_1%3a2.10.3-0ubuntu1.4_amd64.deb
/var/cache/apt/archives/linux-firmware_1.79.11_all.deb
/var/cache/apt/archives/linux-libc-dev_3.2.0-60.91_amd64.deb
/var/cache/apt/archives/nautilus-data_1%3a3.4.2-0ubuntu9_all.deb
/var/cache/apt/archives/pidgin-data_1%3a2.10.3-0ubuntu1.4_all.deb
/var/cache/apt/archives/pidgin_1%3a2.10.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2014-03-27 Thread yoyoq
i see this problem.
i have an ssd and ext4 which i have seen mentioned a few times in other places.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-12-07 Thread Fake Name
I can also confirm this issue.

I'm running vanilla Ubuntu Server 12.03 LTS in a Hyper-V VM.

durr@monsrv:~$ uname -a
Linux monsrv 3.2.0-51-generic #77-Ubuntu SMP Wed Jul 24 20:18:19 UTC 2013 
x86_64 x86_64 x86_64 GNU/Linux
durr@monsrv:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION=Ubuntu 12.04.3 LTS
durr@monsrv:~$ ps -AF | grep dpk
root 12934 12912  0 12295 30440   0 04:04 pts/100:00:04 /usr/bin/dpkg 
--status-fd 57 --unpack --auto-deconfigure 
/var/cache/apt/archives/linux-headers-3.2.0-57_3.2.0-57.87_all.deb 
/var/cache/apt/archives/python-lazr.restfulclient_0.12.0-1ubuntu1.1_all.deb 
/var/cache/apt/archives/wpasupplicant_0.7.3-6ubuntu2.2_amd64.deb
durr 13213 13078  0  2347   944   0 04:18 pts/200:00:00 grep 
--color=auto dpk

It's been running for at least 15 minutes so far with no end in sight.

It's worth noting that I have no idea what the hold-up is. `iotop` isn't
showing any meaningful disk-activity, and the CPU isn't loaded at all.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-12-07 Thread Fake Name
Forgot to mention. I'm using a plain-old ext4 partition.

Hyper-V instrumentation is showing a pretty static ~25-35 KB/sec read
*and* write from the vhd disk.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-10-25 Thread Jose Guerra
** Also affects: dpkg
   Importance: Undecided
   Status: New

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  Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-09-06 Thread A. Denton
I can confirm this bug.

The following operations took about 15 minutes.

sudo apt-get install linux-generic linux-headers-generic 
linux-headers-generic-lts-quantal linux-image-generic 
linux-image-generic-lts-quantal linux-tools linux-tools-lts-quantal
[...]
Unpacking linux-headers-3.2.0-53 (from 
.../linux-headers-3.2.0-53_3.2.0-53.81_all.deb) ...
Unpacking linux-headers-3.2.0-53-generic (from 
.../linux-headers-3.2.0-53-generic_3.2.0-53.81_amd64.deb) ...

Unpacking linux-headers-3.5.0-40 (from 
.../linux-headers-3.5.0-40_3.5.0-40.62~precise1_all.deb) ...
Unpacking linux-headers-3.5.0-40-generic (from 
.../linux-headers-3.5.0-40-generic_3.5.0-40.62~precise1_amd64.deb) ...
[...]


Meanwhile: 

:~$ sudo ps aux | grep 'dpkg'
root  1243  1.0  1.2 119988 96836 pts/6Ds+  11:56   0:04 /usr/bin/dpkg 
--status-fd 71 --unpack --auto-deconfigure 
/var/cache/apt/archives/linux-image-3.2.0-53-generic_3.2.0-53.81_amd64.deb 
/var/cache/apt/archives/linux-image-3.5.0-40-generic_3.5.0-40.62~precise1_amd64.deb
 /var/cache/apt/archives/linux-generic_3.2.0.53.63_amd64.deb 
/var/cache/apt/archives/linux-image-generic_3.2.0.53.63_amd64.deb 
/var/cache/apt/archives/linux-headers-3.2.0-53_3.2.0-53.81_all.deb 
/var/cache/apt/archives/linux-headers-3.2.0-53-generic_3.2.0-53.81_amd64.deb 
/var/cache/apt/archives/linux-headers-generic_3.2.0.53.63_amd64.deb 
/var/cache/apt/archives/linux-headers-3.5.0-40_3.5.0-40.62~precise1_all.deb 
/var/cache/apt/archives/linux-headers-3.5.0-40-generic_3.5.0-40.62~precise1_amd64.deb
 
/var/cache/apt/archives/linux-headers-generic-lts-quantal_3.5.0.40.46_amd64.deb 
/var/cache/apt/archives/linux-image-generic-lts-quantal_3.5.0.40.46_amd64.deb 
/var/cache/apt/archives/linux-tools-3.2.0-53_3.2.0-53.81_am
 d64.deb /var/cache/apt/archives/linux-tools_3.2.0.53.63_amd64.deb 
/var/cache/apt/archives/linux-tools-3.5.0-40_3.5.0-40.62~precise1_amd64.deb 
/var/cache/apt/archives/linux-tools-lts-quantal_3.5.0.40.46_amd64.deb

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-06-14 Thread Ydacha
On crucial v4 ssd 128 Gb, Ubuntu 13.04, FS etx4 with TRIM, extracting
linux-headers-3.8.0-25-generic take ower 40 min.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-04-23 Thread Peter Pelmatro
I have the same issue. One package that took about 50 minutes to extract was 
the webmin .deb file, using the Ubuntu Archive Manager it extracted within 4 
seconds.
I'm using 12.10 on a 32GB SSD from A-DATA with ext-4. Going by previous reports 
that might have something to do with SSDs?
Using the unsafe io option speed up the unpacking of the webmin package. Took 
only about 20 seconds after that.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-02-02 Thread Ted
I'm experiencing this problem as well.  I suggest all of those with the
problem post some information to help narrow the issue down.  In my case
I'm using a newly installed SSD and have a feeling the slow linux-
headers unpacking is just a side effect of slow write speeds.

Hard drive: SSD  (Corsair CSSD-V60GB2 w/ firmware update)
Size: 60GB
Filesystem: ext4 with dm_crypt full-disk encryption

Ubuntu 12.04 LTS
Kernel: 3.2.0-36-generic

Approximate time to unpack: 30 min

# hdparm -tT /dev/sda2
/dev/sda2:
 Timing cached reads:   6526 MB in  2.00 seconds = 3270.42 MB/sec
 Timing buffered disk reads: 398 MB in  3.00 seconds = 132.57 MB/sec

# dd if=/dev/zero of=tempfile bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 16.0206 s, 67.0 MB/s

During the delay:
iHR linux-headers-3.2.0-37-generic  3.2.0-37.58

Immediately after the delay:
iU  linux-headers-3.2.0-37-generic  3.2.0-37.58

linux-headers is unpacking 8152 small files, so my hunch is that there
is nothing special about the package, nor a problem with dpkg, but
instead that linux-headers is simply demonstrating the already slow disk
speeds we have but don't notice with other packages.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2013-01-17 Thread Richard James
I have this problem in Xubuntu 12.10, ext4 on a SSD (no discard option
in fstab)

I had a previous Xubuntu 12.04 install on this machine previously
(different mechanical hard drive ext4) and had no problem.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-12-26 Thread yoyoq
i see the same behaviour ,  xubuutu 12.04
ext4 hard drive, no NFS involved

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-09-24 Thread Christian Reis
On our Precise amd64 nfs-root systems, installing linux-headers is
definitely what takes ages -- the rest of the package upgrades are
always zippy. For some reason, I see 3 different dpkg-deb instances
kicked off:

root 21184  0.0  0.0  16868   772 pts/1S+   22:05   0:00 dpkg-deb 
--fsys-tarfile 
/var/cache/apt/archives/linux-headers-3.2.0-31_3.2.0-31.50_all.deb
root 21185  0.0  0.0  16868   352 pts/1S+   22:05   0:00 dpkg-deb 
--fsys-tarfile 
/var/cache/apt/archives/linux-headers-3.2.0-31_3.2.0-31.50_all.deb
root 21186  0.0  0.0  16872   352 pts/1S+   22:05   0:00 dpkg-deb 
--fsys-tarfile 
/var/cache/apt/archives/linux-headers-3.2.0-31_3.2.0-31.50_all.deb

Stracing 21186:
write(1, eturn pte;\n}\n\nstatic inline int ..., 4096) = 4096
write(1, _id));\n}\n\nstatic inline int chp_..., 4096) = 4096
write(1, x0100-0x00fc];\t/* 0x00fc */\n\tpsw..., 4096) = 4096
write(1, 01a0-0x0180];\t/* 0x0180 */\n\tpsw_..., 4096) = 4096
write(1, /*\n * Pull in the generic implem..., 4096) = 4096
(printing about 2-3 lines per second)

Stracing 21185:
write(5, 
\306\312\340@\242\334Kg`\273\326f\271\377\330\276%/\224y\301\273\215\327{\357\244tK\20\340...,
 32768) = 32768
read(3, 0\6R\1\3514\206e\355-Q\255\340+V\340 
\374\365\360\226\245\36a\365\7\25266T\2313..., 32768) = 32768
write(5, 0\6R\1\3514\206e\355-Q\255\340+V\340 
\374\365\360\226\245\36a\365\7\25266T\2313..., 32768) = 32768
(Taking about 5 seconds between lines)

Stracing 21184:
wait4(21186, ^C unfinished ...

Is this purely an NFS issue?

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Re: [Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-09-22 Thread Raphaël Hertzog
Hello,

On Sun, 16 Sep 2012, Benedikt wrote:
 I can confirm this bug in a quantal vbox. In a Precise vbox the unpack
 process takes under one minute. Under quantal it takes longer than 5
 min. Linux Headers is the only package that has this problem.

Are you using btrfs in quantal but ext4 in precise ?

That might explain the difference.

Cheers,
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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-09-21 Thread Brian Murray
** Changed in: dpkg (Ubuntu)
   Importance: Undecided = High

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-09-16 Thread Benedikt
I can confirm this bug in a quantal vbox. In a Precise vbox the unpack
process takes under one minute. Under quantal it takes longer than 5
min. Linux Headers is the only package that has this problem.

** Changed in: dpkg (Ubuntu)
   Status: Expired = Confirmed

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-09-09 Thread Launchpad Bug Tracker
[Expired for dpkg (Ubuntu) because there has been no activity for 60
days.]

** Changed in: dpkg (Ubuntu)
   Status: Incomplete = Expired

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-07-11 Thread David Vonka
have been waiting for 20 minutes now. guest: Stock 12.04 LTS server,
host: 12.04 lts lubuntu desktop.  8gb disk, 2gb out of 6gb memory. the
whole dist-upgrade process is rather slow, but these headers really kill
me.

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Re: [Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-05-30 Thread Brian J. Murrell
On 12-05-30 12:18 AM, Launchpad Bug Tracker wrote:
 [Expired for dpkg (Ubuntu) because there has been no activity for 60
 days.]

This is BS.  Just because Ubuntu ignore a bug for 60 days does not make
it eligible for Expriy.  The bug still exists and will exist until
somebody does something about it.  It doesn't just magically go away
after 60 days.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-05-30 Thread Brian J. Murrell
** Changed in: dpkg (Ubuntu)
   Status: Expired = Incomplete

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-05-30 Thread Brian J. Murrell
The filesystem being used here is, no surprise, ext3.  I really don't
think this is a particular filesystem problem.

I'm currently testing dpkg's --force-unsafe-io.  I expect it will speed
things up, yes.  But what if it does?  Will Ubuntu actually use it in
it's package managers given that it's unsafe across power outages?  If
not, there's really no point in even testing it, right?

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-05-30 Thread Brian J. Murrell
Hrm.  Something's awry here.  The baseline control package install only
took 27 seconds.  In fact it only takes 10 seconds on subsequent
installations (i.e. after a dpkg -P).  This really did take much much
longer previously.

However, the same operation over NFS on Gige does take 25 minutes.

Over the same NFS with --force-unsafe-io it takes 26 minutes and that's
probably because in analysing with strace, I don't see dpkg doing
anything different per file being installed:

read(9, ./usr/src/linux-headers-3.2.0-24..., 512) = 512
lstat64(/usr/src/linux-headers-3.2.0-24/arch/alpha/include/asm/gpio.h, 
0xbfd1e310) = -1 ENOENT (No such file or directory)
rename(/usr/src/linux-headers-3.2.0-24/arch/alpha/include/asm/gpio.h.dpkg-tmp,
 /usr/src/linux-headers-3.2.0-24/arch/alpha/include/asm/gpio.h) = -1 ENOENT 
(No such file or directory)
rmdir(/usr/src/linux-headers-3.2.0-24/arch/alpha/include/asm/gpio.h.dpkg-tmp) 
= -1 ENOENT (No such file or directory)
rmdir(/usr/src/linux-headers-3.2.0-24/arch/alpha/include/asm/gpio.h.dpkg-new) 
= -1 ENOENT (No such file or directory)
open(/usr/src/linux-headers-3.2.0-24/arch/alpha/include/asm/gpio.h.dpkg-new, 
O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0) = 10
read(9, /*\n * Generic GPIO API implement..., 1196) = 1196
write(10, /*\n * Generic GPIO API implement..., 1196) = 1196
read(9, \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0..., 
340) = 340
sync_file_range(0xa, 0, 0, 0)   = 0
fchown32(10, 0, 0)  = 0
fchmod(10, 0644)= 0
close(10)   = 0
utimes(/usr/src/linux-headers-3.2.0-24/arch/alpha/include/asm/gpio.h.dpkg-new,
 {{1338377227, 0}, {1325721344, 0}}) = 0

So it seems there is still a sync being done after each file is written,
even with --force-unsafe-io.

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Re: [Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-05-30 Thread Raphaël Hertzog
On Wed, 30 May 2012, Brian J. Murrell wrote:
 Over the same NFS with --force-unsafe-io it takes 26 minutes and that's
 probably because in analysing with strace, I don't see dpkg doing
 anything different per file being installed:

That's because the fsync() are done in a batch at the end of the
unpacking. So the per-file operations at the start are the same...
but when you use --force-unsafe-io you don't have the serie of fsync()
at the end.

 read(9, /*\n * Generic GPIO API implement..., 1196) = 1196
 write(10, /*\n * Generic GPIO API implement..., 1196) = 1196
 read(9, 
 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0..., 340) = 
 340
 sync_file_range(0xa, 0, 0, 0)   = 0


 So it seems there is still a sync being done after each file is written,
 even with --force-unsafe-io.

sync_file_range() is something different, it just tells the filesystem to
start the writeback, it doesn't wait for it to have happened (contrary to
fsync()).

So it should be irrelevant for the time lost, unless Linux's NFS driver
has a poor handling of this Linux-specific function.

Cheers,
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Re: [Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-05-30 Thread Brian J. Murrell
On 12-05-30 01:11 PM, Raphaël Hertzog wrote:
 
 sync_file_range() is something different, it just tells the filesystem to
 start the writeback, it doesn't wait for it to have happened (contrary to
 fsync()).
 
 So it should be irrelevant for the time lost, unless Linux's NFS driver
 has a poor handling of this Linux-specific function.

Well, I tried NOOPing it with an LD_PRELOAD:

sync_file_range(int fd, off64_t offset, off64_t nbytes,
unsigned int flags) {

printf(sync_file_range()\n);
return 0;
}

but that doesn't seem to have helped performance any.

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-05-29 Thread Launchpad Bug Tracker
[Expired for dpkg (Ubuntu) because there has been no activity for 60
days.]

** Changed in: dpkg (Ubuntu)
   Status: Incomplete = Expired

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-03-30 Thread Brian J. Murrell
The process just seems to be very metadata heavy.  For example at one
point in the transaction:

open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cpuidle.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cpuidle.h.dpkg-new,
 
/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cpuidle.h) 
= 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/spi.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/spi.h.dpkg-new,
 /usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/spi.h) = 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/sram.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/sram.h.dpkg-new,
 /usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/sram.h) = 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/timex.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/timex.h.dpkg-new,
 /usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/timex.h) 
= 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cputype.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cputype.h.dpkg-new,
 
/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cputype.h) 
= 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cdce949.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cdce949.h.dpkg-new,
 
/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/cdce949.h) 
= 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/gpio-davinci.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/gpio-davinci.h.dpkg-new,
 
/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/gpio-davinci.h)
 = 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/usb.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/usb.h.dpkg-new,
 /usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/usb.h) = 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/ddr2.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/ddr2.h.dpkg-new,
 /usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/ddr2.h) = 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/tnetv107x.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/tnetv107x.h.dpkg-new,
 
/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/tnetv107x.h)
 = 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/da8xx.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/da8xx.h.dpkg-new,
 /usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/da8xx.h) 
= 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/system.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/system.h.dpkg-new,
 /usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/system.h) 
= 0
open(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/vmalloc.h.dpkg-new,
 O_WRONLY|O_LARGEFILE) = 7
fsync(7)= 0
close(7)= 0
rename(/usr/src/linux-headers-3.2.0-20/arch/arm/mach-davinci/include/mach/vmalloc.h.dpkg-new,
 

[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-03-21 Thread Daniel Hartwig
** Changed in: dpkg (Ubuntu)
   Status: New = Incomplete

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Title:
  Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-03-21 Thread Cefn
The build is a stock Lubuntu Precise installed one its own, taking up
the whole disk with no special partitioning or formatting options. It's
an 8GB expandable virtual disk provided by Oracle Virtualbox.

It's hard to tell for sure what the process is which is taking so long.
It could in principle be some kind of build step, but if this is the
case, something should be shown at the console, else reporters have to
assume it's the 'unpacking' step as indicated.

The process did eventually complete. I'll see if I can recreate the next
time I do an update and carry out the diagnostic steps you describe.

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Title:
  Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

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[Bug 947664] Re: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

2012-03-18 Thread Raphaël Hertzog
Well, you should definitely give more information about your
configuration.

What filesystem are you using ?

Is it significantly faster if you use dpkg's --force-unsafe-io ?

What's the process state in the ps output ?

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Title:
  Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1)

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