[U-Boot] Very slow fatload on bcm2835

[Marek Vasut]

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) ?

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

We're both Czech though ;-)

Best regards,
Marek Vasut
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