platform_system_core/bootstat
James Hawkins e2c2724aee bootstat: Add tons of new boot reasons.
Bug: none
Test: none
Change-Id: I57e89a20f23d3b3cff2fa6667e25f1c37cb2870c
2017-12-18 13:40:27 -08:00
..
.clang-format bootstat: Set up clang-format-2 for bootstat. 2017-05-24 10:19:25 -07:00
Android.bp bootstat: test: inject ro.boot.bootreason values 2017-10-11 13:48:33 -07:00
AndroidTest.xml Add test config to bootstat_tests 2017-04-05 14:49:47 +00:00
OWNERS Add OWNERS. 2017-12-07 13:30:03 -08:00
README.md bootstat: Record the time since factory reset on init. 2016-02-24 11:01:03 -08:00
boot_event_record_store.cpp bootstat: clang-format rebase 2017-09-20 11:27:56 -07:00
boot_event_record_store.h bootstat: clang-format rebase 2017-09-20 11:27:56 -07:00
boot_event_record_store_test.cpp bootstat: clang-format rebase 2017-09-20 11:27:56 -07:00
boot_reason_test.sh bootstat: kernel_panic test w/o bootloader or pstore support 2017-11-20 12:18:09 -08:00
bootstat-debug.rc bootstat: test: inject ro.boot.bootreason values 2017-10-11 13:48:33 -07:00
bootstat.cpp bootstat: Add tons of new boot reasons. 2017-12-18 13:40:27 -08:00
bootstat.rc bootstat: reduce overall boot time 2017-09-19 07:36:34 -07:00
testrunner.cpp bootstat: Fix the base includes to be AOSP-friendly. 2016-01-20 01:28:48 +00:00

README.md

bootstat

The bootstat command records boot events (e.g., firmware_loaded, boot_complete) and the relative time at which these events occurred. The command also aggregates boot event metrics locally and logs the metrics for analysis.

Usage: bootstat [options]
options include:
  -h, --help            Show this help
  -l, --log             Log all metrics to logstorage
  -p, --print           Dump the boot event records to the console
  -r, --record          Record the timestamp of a named boot event
  --record_boot_reason  Record the reason why the device booted
  --record_time_since_factory_reset Record the time since the device was reset

Relative time

The timestamp recorded by bootstat is the uptime of the system, i.e., the number of seconds since the system booted.

Recording boot events

To record the relative time of an event during the boot phase, call bootstat with the -r option and the name of the boot event.

$ bootstat -r boot_complete

The relative time at which the command runs is recorded along with the name of the boot event to be persisted.

Logging boot events

To log the persisted boot events, call bootstat with the -l option.

$ bootstat -l

bootstat logs all boot events recorded using the -r option to the EventLog using the Tron histogram. These logs may be uploaded by interested parties for aggregation and analysis of boot time across different devices and versions.

Printing boot events

To print the set of persisted boot events, call bootstat with the -p option.

$ bootstat -p
Boot events:
------------
boot_complete   71