Re: tftp time outs

The network stack of u-boot is limited, maybe it can't handle the ping traffic at the same time as the TFTP transfer? I'm just guessing here...

-----Original Message----- From: Matteo Guglielmi Matteo.Guglielmi@dalco.ch To: Harm Berntsen harm.berntsen@nedap.com Cc: u-boot@lists.denx.de u-boot@lists.denx.de Subject: Re: tftp time outs Date: Wed, 08 Sep 2021 09:27:31 +0000

I've added the two variables to my u-boot script before calling tftpboot:

echo "Downloading kernel..." setenv tftpblocksize 512 setenv tftptimeout 10000 tftpboot ${ramdisk_addr_r} ${tftp_prefix}/${snap_dir}/${kernel_filename}

but that did not help:

Downloading kernel... Using ethernet@7d580000 device TFTP from server 10.123.123.1; our IP address is 10.123.123.201 Filename 'rpi/conf/e4-5f-01-0f-0a-d8/snap/vmlinuz'. Load address: 0x2700000 Loading: T #T T T #T T ################################################  8 MiB      130.9 KiB/s done

as you can see, while I'm pinging the nic of the raspberry I get a lot of time outs and as soon as I stop pinging it, the download process goes on smoothly.

U-boot version is:

U-Boot 2021.07 (Sep 08 2021 - 11:13:19 +0200)

________________________________ From: Harm Berntsen harm.berntsen@nedap.com Sent: Wednesday, September 8, 2021 9:37:15 AM To: Matteo Guglielmi Cc: u-boot@lists.denx.de Subject: Re: tftp time outs

Great to hear U-Boot is helping you :). For documentation I go to the documentation included in the source code (doc subfolder) and the source code itself.

When CONFIG_NET_TFTP_VARS is enabled you can overwrite the compiled settings with the environment variables (see net/tftp.c in the source code).

I have no experience with boot.cmd files but it looks like you will need the setenv variant :). -----Original Message----- From: Matteo Guglielmi Matteo.Guglielmi@dalco.ch To: Harm Berntsen harm.berntsen@nedap.com Cc: u-boot@lists.denx.de u-boot@lists.denx.de Subject: Re: tftp time outs Date: Tue, 07 Sep 2021 12:51:37 +0000

Hi Harm,

thanks for the suggestion.

I have this set in my .config file

for the compilation of u-boot:

CONFIG_TFTP_BLOCKSIZE=1468

CONFIG_TFTP_WINDOWSIZE=1

I'm also using a custom boot.cmd file... should I instead just put your vars in it like this:

tftpblocksize=512 tftptimeout=10000

or like this:

setenv tftpblocksize 512 setenv tftptimeout 10000

?

I'm still new to u-boot even though I could make it do exactly what I needed... extremely useful to boot my cluster of raspberry pis 4 b with individual kernel options each.

PS:

Any good book around on u-boot?

Good doc seems so difficult to get.

Thank you!

________________________________ From: Harm Berntsen harm.berntsen@nedap.com Sent: Tuesday, September 7, 2021 10:12:45 AM To: Matteo Guglielmi Cc: u-boot@lists.denx.de Subject: Re: tftp time outs

Hi Matteo,

Which version of U-Boot are you using?

Try setting the following environment variables:

tftpblocksize=512 tftptimeout=10000

-- Harm

-----Original Message----- From: Matteo Guglielmi Matteo.Guglielmi@dalco.ch To: u-boot@lists.denx.de u-boot@lists.denx.de Subject: tftp time outs Date: Sun, 05 Sep 2021 13:49:46 +0000

Dear All,

I've noticed that when u-boot is downloading

files from a tftp server (e.g. vmlinuz, initrd

etc.) it starts to time out quite heavily

"##T #T #T..." if I simply ping the NIC of

the raspberry 4b on which it's running.

Thanks for any comment or suggestion on this

behavior.