[External] - Slow MMC IO with Raspberry CM3+ Module

[Vincent Fazio]

Mario,

> -----Original Message-----
> From: U-Boot <u-boot-bounces at lists.denx.de> On Behalf Of Mario 
> Lombardo
> Sent: Wednesday, November 3, 2021 5:40 AM
> To: u-boot at lists.denx.de
> Subject: [External] - Slow MMC IO with Raspberry CM3+ Module
> 
> Dear u-boot list,
> 
> I recently compiled (latest: 2021.10) code of uboot as a boot loader 
> for the Compute Module 3+ (Raspberry). Everything works fine except one issue:
> the IO from the storage is extreme slow. I read about issues in the 
> past related to ext file systems. However the present issue relates to 
> both ext and fat file systems so I assume its cause is different.

Please see this series: https://patchwork.ozlabs.org/project/uboot/list/?series=262375
And this RPi issue: https://github.com/raspberrypi/firmware/issues/1619

> 
> This is what I did:
> 
> U-Boot>   setenv pio_kernel "recovery/kernel.img"
> U-Boot>   setenv pio_initrd "recovery/initrd.img"
> U-Boot>   fatload mmc 0:1 ${kernel_addr_r} ${pio_kernel}
> 5299624 bytes read in 45262 ms (114.3 KiB/s)
> U-Boot>   fatload mmc 0:1 ${ramdisk_addr_r} ${pio_initrd}
> 24239932 bytes read in 206978 ms (114.3 KiB/s)
> 
> The configuration of by build is attached.
> 
> Is there anyone else experiencing this kind of issues?
> 
> Thank you very much.
> 
> Mario
> 
> 
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-Vincent