[U-Boot] Very slow fatload on bcm2835

[Stephen Warren]

On 06/17/2015 04:43 AM, Marek Vasut wrote:
> On Tuesday, June 16, 2015 at 11:19:11 AM, Michal Marek wrote:
>> On 2015-06-16 06:01, Stephen Warren wrote:
>>> On 06/11/2015 12:35 PM, Jakub Kicinski wrote:
>>>> Hello!
> 
> Hi/Ahoj :)
> 
>>>> 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.
> 
> Hmmmm, get_timer() returns msecs, not usecs. I wonder what I was smoking.
> Can you try with the attached diff please (I only compile-tested it) ?

Thanks for the quick fix; it works great.
Tested-by: Stephen Warren <swarren at wwwdotorg.org>

>> I think you meant Marek Vašut. I'm Marek by last name :).
> 
> We're both Czech though ;-)

Oops. Must check my auto-completes more thoroughly!