Yep, still polling at the same rate doing inotify add watches: root@ubuntu-phablet:~# strace -f -p 2078 Process 2078 attached with 4 threads [pid 2091] restart_syscall(<... resuming interrupted call ...> <unfinished ...> [pid 2081] restart_syscall(<... resuming interrupted call ...> <unfinished ...> [pid 2080] restart_syscall(<... resuming interrupted call ...> <unfinished ...> [pid 2078] restart_syscall(<... resuming interrupted call ...> <unfinished ...> [pid 2091] <... restart_syscall resumed> ) = 0 [pid 2091] clock_gettime(CLOCK_MONOTONIC, {4118, 702253017}) = 0 [pid 2091] inotify_add_watch(13, "/usr/local/share/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] inotify_add_watch(13, "/usr/share/ubuntu-touch/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] inotify_add_watch(13, "/etc/xdg/xdg-ubuntu-touch", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] clock_gettime(CLOCK_MONOTONIC, {4118, 704436632}) = 0 [pid 2091] poll([{fd=12, events=POLLIN}, {fd=13, events=POLLIN}], 2, 3997) = 0 (Timeout) [pid 2091] clock_gettime(CLOCK_MONOTONIC, {4122, 706523555}) = 0 [pid 2091] inotify_add_watch(13, "/usr/local/share/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] inotify_add_watch(13, "/usr/share/ubuntu-touch/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] inotify_add_watch(13, "/etc/xdg/xdg-ubuntu-touch", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] clock_gettime(CLOCK_MONOTONIC, {4122, 708504478}) = 0 [pid 2091] poll([{fd=12, events=POLLIN}, {fd=13, events=POLLIN}], 2, 3992) = 0 (Timeout) [pid 2091] clock_gettime(CLOCK_MONOTONIC, {4126, 705271171}) = 0 [pid 2091] inotify_add_watch(13, "/usr/local/share/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] inotify_add_watch(13, "/usr/share/ubuntu-touch/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] inotify_add_watch(13, "/etc/xdg/xdg-ubuntu-touch", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) [pid 2091] clock_gettime(CLOCK_MONOTONIC, {4126, 706779632}) = 0
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to telephony-service in Ubuntu. https://bugs.launchpad.net/bugs/1308136 Title: telephony-service-indicator is waking up every 4 seconds adding inotifies on paths that don't exist Status in Telephony Service: Triaged Status in “telephony-service” package in Ubuntu: Incomplete Bug description: Daily wakeups tests show that telephony-service-indicator is not that idle on an "idle" system: http://ci.ubuntu.com/power/eventstat/image/3138/machine/6/task /telephony-service-indicator/details/ It is waking up every 4 seconds on a poll() and doing two inotify_add_watch() calls on paths that don't exist, which wastes power on devices such as phones, e.g: Inotify watches added: PID Process Rate/Sec File 2102 telephony-service-in 0.250 /usr/local/share/applications 2102 telephony-service-in 0.250 /usr/share/ubuntu-touch/applications This can be observed with strace: poll([{fd=7, events=POLLIN}, {fd=8, events=POLLIN}], 2, 3984) = 0 (Timeout) clock_gettime(CLOCK_MONOTONIC, {10864, 224048956}) = 0 inotify_add_watch(8, "/usr/local/share/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) inotify_add_watch(8, "/usr/share/ubuntu-touch/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) clock_gettime(CLOCK_MONOTONIC, {10864, 229054297}) = 0 poll([{fd=7, events=POLLIN}, {fd=8, events=POLLIN}], 2, 3987) = 0 (Timeout) clock_gettime(CLOCK_MONOTONIC, {10868, 227833482}) = 0 inotify_add_watch(8, "/usr/local/share/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) inotify_add_watch(8, "/usr/share/ubuntu-touch/applications", IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR) = -1 ENOENT (No such file or directory) clock_gettime(CLOCK_MONOTONIC, {10868, 233998598}) = 0 Can these redundant polling checks be reduced or removed? Polling every 4 seconds is a little bit heavy handed IMHO. To manage notifications about this bug go to: https://bugs.launchpad.net/telephony-service/+bug/1308136/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp