The PID is deceiving. It's actually a thread of a different PID which is /usr/bin/ubuntu-location-serviced
$ system-image-cli -i
current build number: 94
device name: arale
channel: ubuntu-touch/rc-proposed/ubuntu
last update: 2015-08-28 07:44:31
version version: 94
version ubuntu: 20150828
version device: 20150818-0b38025
version custom: 20150828
Confirmed. Even after turning off all location services, this continues to have the highest number of wakeups of any user service:
$ sudo eventstat start_range_ ns tick_sched_timer tempinfo eCallBack OSTimerCallback Wrapper start_range_ ns hrtimer_wakeup <------ ------- ------- ------- ------- ------- ------- start_range_ ns hrtimer_wakeup start_range_ ns hrtimer_wakeup start_range_ ns hrtimer_wakeup _timer sched_rt_ period_ timer stp_is_ idle start_range_ ns hrtimer_wakeup start_range_ ns hrtimer_wakeup timeout_ uninterruptible process_timeout hv_detect_ sw_workaround
Event/s PID Task Init Function Callback
26.00 0 [swapper/0] hrtimer_
20.00 0 [swapper/0] hrtimer_start tscpu_update_
20.00 22750 [kworker/0:0] OSTimerWorkQueu
10.00 2556 ubuntu-location hrtimer_
8.00 0 [swapper/0] hrtimer_start tick_sched_timer
5.00 25671 unity8 hrtimer_
3.00 57 [hps_main] _hps_task_main process_timeout
2.00 1370 gmain hrtimer_
2.00 25706 ubuntu-push-cli hrtimer_
1.00 1 [swapper/0] start_bandwidth
1.00 0 [swapper/0] mlog_timer_handler mlog_timer_handler
1.00 1879 [tx_thread] __pm_wakeup_event pm_wakeup_timer_fn
1.00 22750 [kworker/0:0] osal_timer_modify _stp_psm_
1.00 15947 sshd sk_reset_timer tcp_write_timer
1.00 25751 ubuntu-push-cli hrtimer_
1.00 0 [swapper/0] add_timer wmt_cal_stats
1.00 847 6620_launcher hrtimer_
1.00 22750 [kworker/0:0] schedule_
1.00 1 [swapper/0] hrtimer_start charger_
106 Total events, 106.00 events/sec (kernel: 84.00, userspace: 22.00)
The PID is deceiving. It's actually a thread of a different PID which is /usr/bin/ ubuntu- location- serviced
$ system-image-cli -i touch/rc- proposed/ ubuntu
current build number: 94
device name: arale
channel: ubuntu-
last update: 2015-08-28 07:44:31
version version: 94
version ubuntu: 20150828
version device: 20150818-0b38025
version custom: 20150828