Syslinux - Mar 2014 - Very slow download with pxelinux > 4.07 on specific hardware

Hi,

We only have Dell computers here. We have about 100 optiplex 380.

Here is a link to download my wireshark traces :
http://dl.free.fr/qgCPEM5Uo

In this traces i tested pxelinux and lpxelinux 6.03 on optiplex 740(the 
one working)
and optiplex 380.

pxelinux works on both computers but very slowly on 380 as seen in traces.

lpxelinux works only on 740. On 380 it seems to enter in a kind of loop 
: the client computer sending Acknowledgement for a block continuously 
(but not for every block)

for lpxelinux on 380, it took 2 traces. One on the server, and one on a 
hub i connected to the client. (note the problem happen even without the 
hub and on all 380 computers)

Cheers

Le 26/02/2014 01:15, H. Peter Anvin a ?crit :
> On 02/25/2014 08:31 AM, Eric PEYREMORTE wrote:
>> Notice the same thing happens with optiplex 790 (core i5 sandy bridge).
>>
>> With 790 too everything is ok with pxelinx 4.0.7.
>>
>> I'll post a wireshark later.
> The common thread seems to be Dell...
>
> 	-hpa
>
>
>

Le 26/02/2014 17:06, Eric PEYREMORTE a ?crit :
> Hi,
>
> We only have Dell computers here. We have about 100 optiplex 380.
>
> Here is a link to download my wireshark traces :
> http://dl.free.fr/qgCPEM5Uo
>
> In this traces i tested pxelinux and lpxelinux 6.03 on optiplex 
> 740(the one working)
> and optiplex 380.
>
> pxelinux works on both computers but very slowly on 380 as seen in 
> traces.
>
> lpxelinux works only on 740. On 380 it seems to enter in a kind of 
> loop : the client computer sending Acknowledgement for a block 
> continuously (but not for every block)
>
> for lpxelinux on 380, it took 2 traces. One on the server, and one on 
> a hub i connected to the client. (note the problem happen even without 
> the hub and on all 380 computers)
>
> Cheers
>
> Le 26/02/2014 01:15, H. Peter Anvin a ?crit :
>> On 02/25/2014 08:31 AM, Eric PEYREMORTE wrote:
>>> Notice the same thing happens with optiplex 790 (core i5 sandy
bridge).
>>>
>>> With 790 too everything is ok with pxelinx 4.0.7.
>>>
>>> I'll post a wireshark later.
>> The common thread seems to be Dell...
>>
>>     -hpa
>>
>>
>>
>
>
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>
Ok i give up. I will stick with the old version version (4.07) which 
works well with dell 380 and 790.

I tried to understand what happened between 4.07 and 5 but i don't have 
the skill to understand low level c.

Seems that the memory management changed a lot, maybe the culprit. But 
as many other things changed this is not obvious...

?Hi,?

On 10 March 2014 18:13, Eric PEYREMORTE <eric.peyremorte at
iut-valence.fr>wrote:
> Ok i give up. I will stick with the old version version (4.07) which works
> well with dell 380 and 790.
>
> I tried to understand what happened between 4.07 and 5 but i don't have
> the skill to understand low level c.
>
> Seems that the memory management changed a lot, maybe the culprit. But as
> many other things changed this is not obvious...
>
?sad to say, we have exactly the same problem. With HTTP downloads it is
much worse, we could not find a stable and reliable version after 4.x.
Sadly nobody wanted to fix our syslinux problem, even as paid development.

I very much hope that the syslinux project will overcome these obstacles.
It would be sad to see all the new development stay unused because if this.

Regards,
Schlomo