Re: [U-Boot] Very slow fatload on bcm2835

[Michal Marek]

On 2015-06-16 06:01, Stephen Warren wrote:
> On 06/11/2015 12:35 PM, Jakub Kicinski wrote:
>> Hello!
>>
>> I'm using latest git source of U-Boot on Raspberry Pi Compute Module 
>> and performance of fatload is quite bad.  Does anyone have any clue
>> about what can be wrong?  Is it the lack of cache?
>>
>> Sample boot log:
> ...
>> reading zImage
>> 4003816 bytes read in 48930 ms (79.1 KiB/s)
> 
> I see this too. I bisected it to:
> 33fe2fb8df01 ARM: mmc: bcm283x: Remove get_timer_us() from mmc driver
> 
> Marek, this is the second symptom I bisected to this patch. Something
> seems quite wrong with it. Did changing to the other timer function
> change the timer tick rate or something? FWIW, "sleep 10" at the shell
> prompt appears to run for the correct amount of time, so I guess it's
> not that.

I think you meant Marek Vašut. I'm Marek by last name :).

Michal

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Re: [U-Boot] [PATCH 2/2] kbuild: create symbolic link only for ARM, SPARC, PowerPC, x86

[Michal Marek]

Dne 26.5.2015 v 14:32 Masahiro Yamada napsal(a):
> The symbolic link to SoC/CPU specific header directory is created
> during the build, while it is only necessary for ARM, SPARC, x86,
> and some CPUs of PowerPC.  For the other architectures, it just
> results in a broken symbolic link.
> 
> Introduce CONFIG_CREATE_ARCH_SYMLINK to not create unneeded symbolic
> links.
> 
> Signed-off-by: Masahiro Yamada 
> ---
> 
>  arch/Kconfig  | 6 ++
>  arch/powerpc/Kconfig  | 3 +++
>  scripts/Makefile.autoconf | 2 ++
>  3 files changed, 11 insertions(+)
[...]
> diff --git a/scripts/Makefile.autoconf b/scripts/Makefile.autoconf
> index f054081..a17e374 100644
> --- a/scripts/Makefile.autoconf
> +++ b/scripts/Makefile.autoconf
> @@ -106,6 +106,7 @@ include/config.h: scripts/Makefile.autoconf 
> create_symlink FORCE
>  # Otherwise, create a symbolic link to arch/$(ARCH)/include/asm/arch-$(SOC).
>  PHONY += create_symlink
>  create_symlink:
> +ifeq ($(CONFIG_CREATE_ARCH_SYMLINK),y)

'ifdef CONFIG_CREATE_ARCH_SYMLINK' is shorter and maybe easier to read.

But you confused me, I thought this was a kernel patch at first :).

Michal
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