[gPXE] [Etherboot-developers] [PATCH] [tftp] Kick off TFTP RRQ from a process to avoid losing first packet

[Stefan Hajnoczi]

On Tue, Jan 12, 2010 at 4:45 PM, Thomas Horsten <thomas at horsten.com> wrote:
>> How big are the delays you are seeing?
>
> About 400ms for each TFTP transfer. This adds up when GRUB loads 10 or
> more modules.

That is huge.  I think anything >100ms is going to be noticable.

This large number surprises me because the numeric resolver needs 1
round-robin dispatch and the retry timer should start very low (<10ms
I think).

Can you give details of the setup so I can reproduce and profile it?

I wonder if there is something weird like unnecessary DNS resolution going on.

Thanks,
Stefan