Public bug reported:
I've observed that location service is waking up ~10 times per second
due to a 100ms sleep
ps -ax | grep 2295
2295 ? Ssl 0:00 /usr/bin/ubuntu-location-serviced --bus system
--provider gps::Provider
eventstat shows it's the top waking userspace process on the phone:
root@ubuntu-phablet:/# eventstat 300 1
Event/s PID Task Init Function Callback
9.99 2304 ubuntu-location hrtimer_start_range_ns hrtimer_wakeup
health-check shows that this is occuring in a 100ms nanosleep() system
call.
Attached is the output from health-check. Is is possible to use a
select() or poll() rather than a 10Hz non-blocking delay loop to reduce
polling wakeups?
** Affects: location-service (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Output of health-check showing polled 10Hz sleep issue"
https://bugs.launchpad.net/bugs/1350871/+attachment/4166674/+files/health-check.log
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https://bugs.launchpad.net/bugs/1350871
Title:
location service is waking up at 10Hz causing possible unwanted
wakeups
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