[syslinux] Syslinux 4.04 gpxelinux.0 http performance problem with VMware VMs

[H. Peter Anvin]

On 09/16/2012 06:30 AM, Pasi Kärkkäinen wrote:
>
> My testing was performed in a single subnet, so no routing involved.
> The web server was apache2 running on CentOS 5, and I was transferring
> an image size of around 300 MB.
>
> I think the "poor" performance is because of the big amount of retransmits that
> I'm seeing with syslinux pxe. When benchmarking the same setup/VMs from Linux
> I get almost wirespeed and no restransmits..
>
> Something in syslinux pxe stuff is causing those retransmits/drops..
>

gPXE is extremely sensitive to packet reordering.  I think iPXE might be 
better.  pxelinux-lwip (i.e. pxelinux.0 from syslinux-4.10-pre*) should 
be even better than that.

Would you might trying those out?

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.