[coreboot] Timing via serial port

[Kevin O'Connor]

On Sat, Apr 18, 2009 at 09:14:06PM -0400, Kevin O'Connor wrote:
> On my epia-cn machine, it takes coreboot-v2 8.7 seconds to launch
> SeaBIOS.  It looks like about 4 seconds is lost due to a reboot
> half-way through the startup - I'm guessing a watchdog timer is
> kicking in.  As to why it takes so long to boot - maybe rom caching is
> off?

Nope - looks like calibrate_tsc is taking 2.9 seconds to calibrate:

00.608: Jumping to coreboot.
00.609: coreboot-2.0.0-epiacn Sat Apr 18 21:34:47 EDT 2009 booting...
00.612: Calibrating delay loop...
03.530: end 12e0a2189, start 292b71b4
03.532: 32-bit delta 4173
03.533: calibrate_tsc 32-bit result is 4173
03.534: clocks_per_usec: 4173
03.536: Enumerating buses...

-Kevin