[U-Boot] [PATCH 3/8] boottime: Add core boottime measurement support

Lee Jones
2012-11-26T09:00:48Z

Hi Simon,

> On Tue, Nov 20, 2012 at 6:33 AM, Lee Jones <lee.jones@linaro.org> wrote:
> > Boottime is a tool which can be used for full system booting time
> > measurement. Bootloader boot time is passed to the kernel component
> > though ATAGS. The kernel-side driver then uses this information to
> > provide full system boot time diagnostics though debugfs.
> >
> > Based heavily on the original driver by Jonas Aaberg.
> >
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
>
> Did you take a look at bootstage, which seems at least on the surface
> to provide a similar mechanism? This passes the information to the
> kernel through a device tree, or worse case a 'stash area'.

I didn't see this before.

I don't see the kernel counterpart, did it make it upstream?

Wolfgang, didn't you know about bootstage? This could have saved
us a great deal of time.

Kind regards,
Lee

--
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
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