Re: Antw: [EXT] [systemd-devel] [SPECIFICATION RFC] The firmware and bootloader log specification

[Rasmus Villemoes]

On 16/11/2020 08.02, Ulrich Windl wrote:
>>>> Daniel Kiper <daniel.kiper@xxxxxxxxxx> schrieb am 14.11.2020 um 00:52 in
> Nachricht <20201113235242.k6fzlwmwm2xqhqsi@xxxxxxxxxxxxxxxxxxxx>:
> ...
>> The members of struct bf_log_msg:
>>   ‑ size: total size of bf_log_msg struct,
>>   ‑ ts_nsec: timestamp expressed in nanoseconds starting from 0,
> 
> Who or what defines t == 0?

Some sort of "clapperboard" log entry, stating "the RTC says X, the
cycle counter is Y, the onboard ACME atomic clock says Z, I'm now
starting to count ts_nsec from W" might be useful for some eventual
userspace tool to try to stitch together the log entries from the
various stages. I have no idea how a formal spec of such an entry would
look like or if it's even feasible to do formally. But even just such
entries in free-form prose could at least help a human consumer.

Rasmus