reported timestamps during boot process?

[Michael Grimm]

Erich Dollansky <erichsfreebsdlist at alogt.com> wrote:
> Michael Grimm <trashcan at ellael.org> wrote:

>> Is there a way to investigate the boot process by means of reported
>> timestamps in some logfile? dmesg doesn't seem to be the tool of
>> choice.

> you might find some hints in /var/log/messages.

Nope. It looks to me [1] that, whilst booting, kernel messages are written to that file in one batch after syslogd has been fired up. Timestamps of those messages are all showing the very same second.

Linux' dmesg has such a feature [2] I am looking for:

|	-d, --show-delta
|
|		Display the timestamp and the time delta spent between
|		messages.  If used together with —notimee then only the time
|		delta without the timestamp is printed.

Regards,
Michael

[1] is that correct?
[2] http://man7.org/linux/man-pages/man1/dmesg.1.html