netperf on RPI

[Mohammad Hamad]

Hi Norman,
I used the WireShark to monitor the Traffic ,
when i measure the TCP_STREAM the tcp packet from the linux to rpi has
small window size  ( 229 ) while it is around (18000) from rpi to the Linux
,

is that the problem ,
should i try to change this value  and what is the regulare value to use it
?

best ,


2014-11-04 3:57 GMT-08:00 Mohammad Hamad <mhh.it1986 at ...9...>:

> Hi Norman ,
> I just moved this morning to the current master branch and i got the same
> bad result for the throughput (between 2 and 6  10^6 bits/sec)
>
> I will try the wireshark to monitor the traffics and try to find the
> problem.
>
> i will keep you updated.
>
> best,
>
> 2014-11-04 11:58 GMT+01:00 Norman Feske <norman.feske at ...1...>:
>
>> Hello Mohammad,
>>
>> could you please switch to the current master branch? The "rpi_usb"
>> branch is out of date. It was just a topic branch for the USB SOF
>> optimzation, which ended up the master branch already.
>>
>> I cannot explain your observation. To investigate, you may use wireshark
>> to monitor the traffic in both cases (Linux vs. OpenBSD in the VM) and
>> look for the TCP protocol parameters. Maybe Linux uses a very small TCP
>> window in the bad case?
>>
>> > when i run the test from OpenBSD  in the debug output of netperf  in the
>> > Rpi I get  meaasges like
>> >
>> > [init] child "netserver_genode" request resources :ram_quota= XXXXX
>>
>> We don't have these messages in our log but we use a different branch.
>>
>> The messages should not interfere with the throughput. They just hint at
>> a misconfiguration of the RAM quota assigned to the netserver_genode
>> process. The process tries to allocate more memory than assigned. But
>> since init has still slack memory available, it is handing out the
>> needed memory on demand.
>>
>> Cheers
>> Norman
>>
>> --
>> Dr.-Ing. Norman Feske
>> Genode Labs
>>
>> http://www.genode-labs.com · http://genode.org
>>
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>> Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
>>
>>
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>
>
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