** Also affects: telephony-service (Ubuntu)
Importance: Undecided
Status: New
** Changed in: telephony-service (Ubuntu)
Status: New => Triaged
** Changed in: telephony-service (Ubuntu)
Importance: Undecided => High
** Changed in: telephony-service (Ubuntu)
Assignee: (unassigned) => Tiago Salem Herrmann (tiagosh)
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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:
Triaged
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.
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