[ipxe-devel] Is it possible to alter the tcp window size in ipxe for an http download?

[Hoey, Matthew]

That's promising. I'm looking forward to trying it out. I ran into one tiny
snag though.

We use three different images for chain loading depending on the hardware.
We use undionly.kpxe, undionly.kkpxe, and r8169.kpxe. I successfully built
the first two but I'm getting an "undefined symbol" error when attempting
to build r8169. The actual card says it is an rtl8167. I'm curious what is
the correct kpxe file to build and more importantly, how would I know that
without bothering you guys the next time? I noticed there are several
possible builds I can do (rtl8139, rtl8180, rtl8185); do any of these
supersede r8169?

Matt

Error when building r8169.kpxe:

src$ make ./bin/r8169.kpxe
  [LD] bin/r8169.kpxe.tmp
arch/i386/scripts/i386.lds:1: undefined symbol `obj_r8169' referenced in
expression
make: *** [bin/r8169.kpxe.tmp] Error 1

On Thu, Aug 2, 2012 at 6:32 PM, Michael Brown <mbrown at fensystems.co.uk>wrote:

> On Thursday 02 Aug 2012 23:06:55 Hoey, Matthew wrote:
> > Here is an example script that we run. Very simple, but we have problems
> > over high latency lines (160ms). The window didn't seem to get larger
> than
> > 5192. It takes about 7 mins to download a 15MB file where as after I
> > install CentOS and use wget it downloads in 1.5 secs. Is there a way to
> > tell ipxe to scale the window size?
>
> Use a version of iPXE more recent than July 8 2012.  Several TCP
> performance
> improvements went in recently, and iPXE now uses a default window size of
> 256kB rather than 8kB.
>
> Michael
>
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