Public bug reported: Binary package hint: ureadahead
After upgrading to maverick, I noticed boot time was longer than with lucid, about 42s in maverick instead of 30s in lucid. >From the bootchart it seemed ureadahead was not properly working. It showed >continuous hdd activity. >From the ureadahead changelog I saw buffer size had been decreased to 8MB. >Therefore I rebuilt ureadahead with the previous 128MB/num_cpus. That gave a >good boot speed again, 28.21s, slightly faster than lucid. I also built a version with fixed 8MB buffer, independent of num_cpus. That gives about the same result as 128MB/num_cpus. Was the division by num_cpus intended? With the original maverick ureadahead the pack file was about 480kbyte, with 128/num_cpus the pack file was about 1 MB, with 8MB pack file is 993kB. Processor is an Intel T7500, dual core. File system is ext 4 on lvm on a laptop hdd (320GB, 7200 rpm). I also dumped the pack files and counted the number of files (grep bytes on the dump): maverick original: 1676 files with buffer 128MB/num_cpus: 3413 files with buffer 8MB fixed: 3368 files ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: ureadahead 0.100.0-8 ProcVersionSignature: Ubuntu 2.6.35-22.34-generic 2.6.35.4 Uname: Linux 2.6.35-22-generic x86_64 Architecture: amd64 Date: Wed Oct 13 18:06:26 2010 PackDump: Error: command ['ureadahead', '--dump'] failed with exit code 4: ureadahead:/var/lib/ureadahead/pack: Permission denied ProcEnviron: PATH=(custom, user) LANG=en_US.utf8 SHELL=/bin/bash SourcePackage: ureadahead ** Affects: ureadahead (Ubuntu) Importance: Undecided Status: New -- ureadahead buffer size seems too small https://bugs.launchpad.net/bugs/660043 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs