The BOOTSTAGE Kconfig symbol allows to record boot time information which can be consumed in several ways:
1) Printed to the console just before the OS is booted (when BOOTSTAGE_REPORT=y) 2) Printed to the console by the "bootstage report" command (when CMD_BOOTSTAGE=y) 3) Passed to the OS in the Device Tree (when BOOTSTAGE_FDT=y) 4) Written to some memory location in binary format before the OS is booted (when BOOTSTAGE_STASH=y) None of these options are convenient for use in CI. Suppose we want to monitor a set of boards for boot time regressions -- in other words, make sure the boot time does not degrade unexpectedly as the code evolves. For that, we'd like to be able to record the bootstage data in some kind of database or persistent storage and possibly draw graphs showing trends over time. This RFC is a step in that direction. It introduces two new output formats for the bootstage data. The two are independant, they are simply two options I considered: 1) JSON 2) InfluxDB v2 line protocol [1] Both depend on BOOTSTAGE_REPORT and are enabled by BOOTSTAGE_REPORT_JSON and BOOTSTAGE_REPORT_INFLUXDB respectively. Each format comes with its own test in test/py/tests. The InfluxDB test is special in that it is able to upload the data to a cloud database, provided the environment variables BOOTSTAGE_INFLUXDB_URI and BOOTSTAGE_INFLUXDB_TOKEN are set properly. I have been able to run a boot test on rpi4 in the sjg-lab with BOOTSTGE_REPORT_INFLUXDB enabled. The CI log [2] shows that the data were indeed uploaded to my InfluxDB Cloud test account. This is published as an RFC since it is just an investigation. If someone finds this useful I may folloow-up with a non-RFC series. Comments are welcome. [1] https://docs.influxdata.com/influxdb/v2/reference/syntax/line-protocol/ [2] https://source.denx.de/u-boot/custodians/u-boot-net/-/jobs/1097039#L116 Jerome Forissier (7): efi_loader: make efi_exit_boot_services() call bootstage_report() bootstage: add support for reporting in JSON format test/py/tests/test_bootstage.py: add test for JSON report bootstage: add support for reporting in InfluxDB v2 line format test/py/tests/test_bootstage.py: add test for InfluxDB report sandbox64_defconfig: enable bootstage report in JSON and InfluxDB formats test/py/tests/test_bootstage.py: upload bootstage data to InfluxDB cloud boot/Kconfig | 17 ++ common/bootstage.c | 289 +++++++++++++++++++++++++++++++- configs/sandbox64_defconfig | 2 + lib/efi_loader/efi_boottime.c | 7 + test/py/requirements.txt | 1 + test/py/tests/test_bootstage.py | 57 +++++++ 6 files changed, 372 insertions(+), 1 deletion(-) -- 2.43.0
