[syslinux] pxelinux 4.10-pre17 HTTP performance (cptime)

[H. Peter Anvin]

On 12/30/2011 04:26 AM, Schlomo Schapiro wrote:
> Hi,
>
> thanks for writing cptime, after manually adding it to the Makefile of a
> lwip git checkout it compiled fine (same about prdhcp) (only isohybrid
> complained about a missing uuid/uuid.h)...
>
> I have a 64bit VM with VMXNET3 and go there this result:
>
> [image: cptime.png]
>
> (can everybody see the picture?)
>
> The download of a 180MB large file (Parted Magic initrd) takes between 60
> and 72 seconds, which is about 2.6 to 2.3 MiB/s.
>
> Can this go any faster? Or is this the most that we can get out of a
> preboot environment?

What protocol are you using?

It depends greatly on the quality of the preboot environment.  I have 
seen gigabit cards which will not negotiate anything above 10 Mbps from 
the PXE stack, and others which will do 75 MiB/s sustained.

	-hpa