Hi Andrew, On Thu, Sep 1, 2011 at 9:25 AM, Andrew Murray <amur...@mpc-data.co.uk> wrote: > On 1 September 2011 00:12, Simon Glass <s...@chromium.org> wrote: >> Hi Mike, >> >> On Wed, Aug 31, 2011 at 3:47 PM, Mike Frysinger <vap...@gentoo.org> wrote: >>> On Wednesday, August 31, 2011 18:20:54 Andrew Murray wrote: >>>> This patchset introduces the CONFIG_BOOT_TRACE option which provides >>>> support for boot time instrumentation. >>>>
[snip] >>>> >>>> The patch currently provides support for instrumentation of UBoot commands >>>> (e.g. U_BOOT_CMD) for all platforms but only when the HUSH shell is not in >>>> use. Initialisation instrumentation is only limited to the >>>> arch/arm/lib/board.c file at present but can very easily be extended to >>>> other relevant files. >>> >>> i feel like we've had similar ideas tossed around semi-recently. am i just >>> misremembering ? No, your memory is fine :) >>> -mike >>> >> >> Yes, for example: >> >> http://patchwork.ozlabs.org/patch/95513/ >> >> It got caught up with a big discussion about whether we want a >> microsecond timer. There is now one in Tegra, but not in the generic >> timer API. There was also a request to unify this with the >> boot_progress stuff (i.e. it turned into a big cleanup). >> >> I haven't got back to it yet, but could probably do something next week. >> >> I also have patches to pass the timings to the kernel and have it >> report them to user space through a device. Planning to send an RFC to >> the LKML about that probably next week as well. Could be fun. >> >> Regards, >> Simon >> > > Ah - my bad. I only subscribed to the mailing list today (my first > UBoot patch) and didn't notice this previous work. > > Is there any cross over between my approach and what is > planned/already been done? > Have a look through the mailing list archive - I find this one the easiest for scanning headings: http://lists.denx.de/pipermail/u-boot/ Take a look over the last few months for anything timer related - Trust me, the rabit warren is very deep ;) When I get a chance to breath again, I'll be taking another look at the timer API and with the (hopefully) pending inclusion of the pre-console buffer, I think boot tracing will come together very nicely Regards, Graeme _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
