[U-Boot] TCP & Overrrun

[Duncan Hare <dh@synoia.com>]

On Sun, 11 Feb 2018 00:39:05 +0000 (UTC)
Duncan Hare <dh@synoia.com> wrote:

>  Duncan Hare
> 
> 714 931 7952
> 
>      
> ----- Forwarded Message -----
>  From: Joe Hershberger <joe.hershberger@ni.com>
>  To: Duncan Hare <dh@synoia.com> 
> Cc: Joe Hershberger <joe.hershberger@ni.com>; u-boot
> <u-boot@lists.denx.de> Sent: Friday, February 9, 2018 1:11 PM
>  Subject: Re: [U-Boot] TCP & Overrrun
>    
> On Thu, Feb 8, 2018 at 8:41 PM, Duncan Hare <dh@synoia.com> wrote:
> > On Thu, 8 Feb 2018 22:15:44 +0000 (UTC)
> > Duncan Hare <dh@synoia.com> wrote:
> >  
> >>  Duncan Hare
> >>
> >> 714 931 7952
> >>
> >>
> >> ----- Forwarded Message -----
> >>  From: Joe Hershberger <joe.hershberger@ni.com>
> >>  To: Duncan Hare <dh@synoia.com>
> >> Cc: u-boot <u-boot@lists.denx.de>; Joe Hershberger
> >> <joe.hershberger@ni.com> Sent: Thursday, February 8, 2018 11:40 AM
> >>  Subject: Re: [U-Boot] TCP & Overrrun
> >>
> >> Hi Duncan,
> >>
> >> On Wed, Feb 7, 2018 at 8:40 PM, Duncan Hare <dh@synoia.com>
> >> wrote:  
> >> > I'm gettin overrun on the raspberry pi.
> >> >
> >> > Which ethernet drived does it use?  
> >>
> >> You didn't specify which one you are talking about, but here's how
> >> to find out...
> >>
> >> Assuming rpi3, find the config first...
> >>
> >> configs/rpi_3_defconfig says:
> >> CONFIG_DEFAULT_DEVICE_TREE="bcm2837-rpi-3-b"
> >> arch/arm/dts/bcm2837-rpi-3-b.dts says: #include
> >> "bcm283x-rpi-smsc9514.dtsi" arch/arm/dts/bcm283x-rpi-smsc9514.dtsi
> >> says:                ethernet: usbether at 1 {
> >> compatible = "usb424,ec00"; grep -rn ec00 drivers/ says:
> >> drivers/usb/eth/smsc95xx.c
> >>
> >> Cheers,
> >> -Joe
> >>  
> >> > I need to determine if it
> >> > uses CONFIG_SYS_RX_ETH_BUFFER" from net.h and the
> >> > "net_rx_packets" buffer pool defined in net/net.c
> >> >
> >> > grep suggests it is not using net_rx_packets.
> >> >
> >> > Thanks
> >> >
> >> > Duncan Hare
> >> > _______________________________________________
> >> > U-Boot mailing list
> >> > U-Boot at lists.denx.de
> >> > https://lists.denx.de/listinfo/u-boot  
> > ___________________________________________________
> > Joe
> >
> > Two solutions:
> >
> > Option 1.
> >  
> 
> I think option 1 is the way to go.
> 
> Thanks,
> -Joe

Joe

The overruns were caused by printing error messages. The print
process is (very) slow compared with packet and computer speeds, and
causes overruns.

I turned off all the error messages in tcp.c and the overruns also
stopped.

Makes debugging harder.

Duncan