[U-Boot] boot-up time optimization. Where to start?

[Simon Glass]

Hi,

I will post a patch. Also we have a 'time' command we could upstream.

Regards,
Simon

On Mon, May 9, 2011 at 3:49 AM, Detlev Zundel <dzu at denx.de> wrote:

> Hi Simon,
>
> [...]
>
> > I have a patch which displays boot time in microseconds if it is of
> > interest to anyone:
> >
> > Timer summary in microseconds:
> >        Mark    Elapsed  Stage
> >           0          0  awake
> >     193,298    193,298  usb_start
> >   1,342,411  1,149,113  eth_start
> >   3,767,039  2,424,628  bootp_start
> >   3,790,121     23,082  bootp_stop
> >   3,790,293        172  tftp start
> >   4,761,459    971,166  tftp done
> >   4,761,489         30  bootm_start
> >   4,892,145    130,656  start_kernel
>
> Of course we are interested, please show us the code.  Such code, even
> if it does not get into mainline can be a good starter for other people
> benchmarking their port.
>
> Thanks
>  Detlev
>
> --
> "One of my most productive days was throwing away 1000 lines of code."
>  - Ken Thompson.
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