[coreboot] Regarding the timestamp in coreboot.

[Paul Menzel]

Dear Rajashaker


welcome to coreboot!


Am Donnerstag, den 23.04.2015, 11:03 +0800 schrieb rajashaker Goud:

> I can see the CONFIG_COLLECT_TIMESTAMPS macro in the source of coreboot,
> but am unable to get the clear picture of it.

if you select this option, build a coreboot based image and boot to
GNU/Linux, you can read the time stamps with `sudo cbmem -t`.

        $ cd util/cbmem
        $ make
        $ sudo ./cbmem -t

> I want to collect all the timestamps of the drivers and to find out BOOT
> TIME.

What board do you use? Note, AMD AGESA boards currently do *not* support
storing romstage time stamps, so they cannot be read out and are lost
during the boot.

Also remember that the payloads, at least GRUB 2, SeaBIOS and FILO, do
not write store time stamps in CBMEM.

There is also timing information, which coreboot only puts in its
console log (`sudo ./cbmem -c`).

Search for *BS:* and *usec* for example.

Please report back, if that helped you.


Thanks,

Paul


PS: The official spelling of the project name is *coreboot*, that means
it’s one word.
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