History

Mark Salyzyn 161b8626bd init: report shutdown,container for sigterm of init Change HandleSigtermSignal() handler to report shutdown,container. Add the new reason to bootstat. Remove log stutter as HandlPowerctlMessage will also do a LOG(INFO) reporting shutdown,container as reason. Sending SIGTERM to init is to allow a host OS to ask an Android Container instance to shutdown. The temptation is to report shutdown,sigterm but that does not accurately describe the usage scenario. Test: compile Bug: 63736262 Change-Id: I3c5798921bdbef5d2689ad22a2e8103741b570b4		2017-09-27 09:10:00 -07:00
..
.clang-format	bootstat: Set up clang-format-2 for bootstat.	2017-05-24 10:19:25 -07:00
Android.bp	bootstat: introduce sys.boot.reason	2017-09-12 09:28:25 -07:00
AndroidTest.xml	Add test config to bootstat_tests	2017-04-05 14:49:47 +00:00
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: validate last kmsg and bootreason content more carefully	2017-09-20 11:28:02 -07:00
bootstat.cpp	init: report shutdown,container for sigterm of init	2017-09-27 09:10:00 -07:00
bootstat.rc	bootstat: reduce overall boot time	2017-09-19 07:36:34 -07:00
README.md	bootstat: Record the time since factory reset on init.	2016-02-24 11:01:03 -08:00
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