Public bug reported:
Binary package hint: ureadahead
ureadahead hangs on reprofiling after deleting pack file.
This is basically what I do :
1. Check bootchart has files:
# ls /var/log/bootchart/*.gz
2. Delete pack file (to aid in force-reporfiling)
# sudo rm /var/lib/ureadahead/pack
3. Do a force reprofile
(Alternative 1) # sudo ureadahead --verbose --force-trace
(Alternative 2) # sudo ureadahead
The following is the output:
Counted 2 CPUs
<And then a blank screen>
After that nothing happens. Basically:
- no pack files are created in /var/lib/ureadahead/
- No Disk I/O. checked using 'iotop'.
- No significant memory or CPU increase as registered in 'top'.
I have had ureadahead run for hours at a stretch and nothing happened.
When I press Ctrl + C, it quickly flashes a list of files on the screen
(most of it in the /var/cache) directory and exits. Pack file is
created, but it is in the range of KB (not MB).
My expectation was that ureadahead would read the logs from bootchart
and determine the important files that are needed during boot. These
files would be cached as a single place to aid in faster boot times. I
am not sure that is happening and the bootchart output (as png) has
nothing to prove to the contrary.
I get around 65s - 80s (would have expected ~25 s) boot times with a HP
DV6500 laptop running a T7700 processor (more or less state of the art)
with 2 GB physical RAM. HDD is Seagate 5400 RPM, 120 GB and most of it
is empty, It's a single partition and I see no reason why ureadahead
will need any of the files in the /home directory. I have most of the
services disabled through System > Preferences > Startup Applications
and Boot Up Manager.
OS is updated on a daily basis and contains the latest patches and fixes
automatically applied through the Ubuntu Repository.
# uname -a
Linux 2.6.35-23-server #41-Ubuntu SMP x86_64 GNU/Linux
# apt-cache policy ureadahead
ureadahead:
Installed: 0.100.0-8
Candidate: 0.100.0-8
Version table:
*** 0.100.0-8 0
500 http://archive.ubuntu.com/ubuntu/ maverick/main amd64 Packages
100 /var/lib/dpkg/status
** Affects: ureadahead (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/685409
Title:
ureadahead hangs on reprofiling after deleting pack file
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