I ran across this bug because bug #528925 makes this very evident. It seems to me this bug is actually in synaptic as that is another of the big CPU consumers in top and I can reproduce the same behavior by running "Reload" in synaptic. I'm guessing update-manager is actually calling synaptic to do the work.
I tried strace on synaptic and it seems to be doing poll() in a tight loop and getting EAGAIN repeatedly. It should probably be doing select() instead or at least sleeping for a little bit between invocations. No need to update the status bar as fast as possible, it only slows down actual work, like installing packages. :) I grepped the synaptic source and couldn't find any calls to poll() so I guess it is being called inside a library. My gdb skills aren't enough to track that down. -- Update Manager causes high Xorg CPU usage when checking for updates https://bugs.launchpad.net/bugs/355355 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
