Re: [PATCH] Boottime: A tool for automatic measurement ofkernel/bootloader boot time

From: Lee Jones
Date: Fri Oct 12 2012 - 10:01:44 EST


On Fri, 12 Oct 2012, Arnd Bergmann wrote:

> On Friday 12 October 2012, Russell King - ARM Linux wrote:
> > > root@ME:/ cat /sys/kernel/debug/boottime/bootgraph
> > > [ 0.185254] calling splash+0x0/0x0
> > > [ 2.984335] initcall splash+0x0/0x0 returned 0 after 2799 msecs.
> > > [ 2.984335] calling autoboot_delay+0x0/0x0
> > > [ 4.089513] initcall autoboot_delay+0x0/0x0 returned 0 after 1105 msecs.
> > > [ 4.089513] calling load_kernel+0x0/0x0
> > > [ 4.239174] initcall load_kernel+0x0/0x0 returned 0 after 149 msecs.
> > > [ 4.239174] calling boot_kernel+0x0/0x0
> > > [ 4.276260] initcall boot_kernel+0x0/0x0 returned 0 after 37 msecs.
> > > [ 4.276260] calling uncompress_ll_init+0x0/0x0
> > > [ 4.276260] initcall uncompress_ll_init+0x0/0x0 returned 0 after 0 msecs.
> > > [ 4.276260] Freeing init memory: 0K
> >
> > Umm, what happened to sysfs not becoming procfs v2? I thought we had
> > a fairly strict requirement for "one value per file and not nicely
> > formatted" for sysfs?
> >
>
> I was thinking the same thing at first, but then I noticed it's actually
> debugfs, which has no such rules.

Right. :)

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