Regression or not, it's still an annoying bug. I'm attaching performance data from my older computer, where this is a nuisance. In the two minutes I let Thunderbird run, it fetched less than 1000 emails - which means just a few emails per second (which is not good IMO!).
The latest comment indicates that this would be eCryptfs related - for the record, I'm also running eCryptfs. Seeing the top perf results, it looks like they are crypto related, but I don't think this is the only cause. The fact that it also seems to spend a significant amount of time in pthread_mutex_lock/unlock also looks like a programming error to me. 14,78% thunderbird-bin [kernel.kallsyms] [k] aes_encrypt 3,65% thunderbird-bin libfreebl3.so [.] rijndael_decryptBlock128 3,56% thunderbird-bin libmozsqlite3.so [.] zeroPage 3,50% thunderbird-bin [kernel.kallsyms] [k] aes_decrypt 2,56% thunderbird-bin libpthread-2.15.so [.] pthread_mutex_lock 1,84% thunderbird-bin libpthread-2.15.so [.] __pthread_mutex_unlock_usercnt 1,80% thunderbird-bin [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore 1,75% thunderbird-bin [kernel.kallsyms] [k] __copy_from_user_ll_nozero 1,71% thunderbird-bin libfreebl3.so [.] shaCompress ** Attachment added: "perf.data" https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/927515/+attachment/3221899/+files/perf.data -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/927515 Title: thunderbird uses excessive cpu power Status in “thunderbird” package in Ubuntu: Confirmed Bug description: Just received the automatic update last night. Ever since, thunderbird is using 20-50% CPU constantly, according to top. Turned off global search and indexing to no avail. This is really bad for me as it's driving up the temperature of my laptop, runs up the fan noise and reduces battery time. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: thunderbird 10.0+build1-0ubuntu0.11.10.1 ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17 Uname: Linux 3.0.0-16-generic x86_64 ApportVersion: 1.23-0ubuntu4 Architecture: amd64 BuildID: 20120129183038 Date: Mon Feb 6 10:44:55 2012 EcryptfsInUse: Yes ProcEnviron: LANGUAGE=nl_NL:nl:en PATH=(custom, user) LANG=nl_NL.UTF-8 SHELL=/bin/bash Profile0Extensions: extensions.sqlite corrupt or missing Profile0Locales: extensions.sqlite corrupt or missing Profile0Plugins: pluginreg.dat isn't available Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile0 - LastVersion=3.0.6/20100713193322 (Out of date) Profile1 (Default) - LastVersion=10.0/20120129183038 (Running) SourcePackage: thunderbird UpgradeStatus: Upgraded to oneiric on 2012-02-02 (4 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/927515/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
