[gPXE] any negative implications of setting TCP window size to(65536 - 4) ?
H. Peter Anvin
hpa at zytor.com
Fri Feb 19 14:16:19 EST 2010
On 02/19/2010 12:10 AM, Arends, R.R. wrote:
> In our environment (gbit to 100mbit lan) i see an negative impact on using an 65532 tcp window size..
> Atleast with some workstations. For example with an vm in vmware workstation on windows i see alot of TCP Retransmissions...
>
> This is the case with 16k, 32k and 64k.
>
> Switching back to 8k or 4k shows an much smoother tcp flow.
>
> An dynamic tcp window would probably work alot better for us atleast.
>
> -reni
>
It would be useful to know if this is because of out-of-order packets,
or if it is yet another example of how utterly awful VMware's PXE
implementation is (is this using undionly/gpxelinux or using a native
gPXE driver)?
-hpa
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