Hi Sebastian,

i am using QEMU.

Regards, Johanna



>Hi Johanna,
>
>On 07/26/2016 10:58 AM, Johanna Steer wrote:
>> Hi,
>> 
>> i am working on a toolchain monitoring the schedluing behavior of the 
>> fiasco.oc kernel. The data is monitored through the trace service (quota 
>> for trace is 2M).
>> It is then sent to an offline system through an active TCP/IP connection 
>> and written into a database. VDE is used for that and i am working on 
>> Ubuntu 14.04.
>> My problem is that the data isn't sent reliably. I am executing a 
>> periodic task that returns zero and exits. The only thing that varies is 
>> the period. After 20 seconds the tasks stop, the monitored data is 
>> gathered and then sent to the offline system.
>> The kernel says that it is sending the data, but the system freezes at 
>> times and the data simply doesn't arrive.
>> The system reacts quite randomly: Sometimes it sends the files, 
>> sometimes it doesn't. Sometimes i get an error (shown below). It seems 
>> easier to send small data sizes (around 200KB), above 700KB hardly 
>> anything works. In between, it might work or not. As far as i have 
>> experienced there is no pattern behind it.
>> 
>> I tried the tests before with only 1M quota for trace and the 
>> reliability improved with 2M quota. However, with 4M it gets worse again 
>> and the error occures more often.
>> 
>> 
>> Here ist the error:
>> 
>> [init -> nic_drv] tx fifo overrun, ignore packet
>
>This error comes from the lan9118 NIC driver. It is a network card
>driver we use for the PBXA9 ARM platform in Qemu only. We have never
>used it on real hardware, and therefore, it might not work correctly
>there. What SoC are you using or do you use Qemu?
>
>Regards,
>
>Sebastian
>
>> : spawn id exp6 not open
>>      while executing
>> "expect {
>>          -i $running_spawn_id $platform_msg { puts stderr "Error: 
>> platform rebooted unexpectedly"; exit -4 }
>>          -i $running_spawn_id -re $wait_for_re..."
>>      (procedure "wait_for_output" line 22)
>>      invoked from within
>> "wait_for_output $wait_for_re $timeout_value $qemu_spawn_id"
>>      (procedure "run_log" line 28)
>>      invoked from within
>> "run_log $wait_for_re $timeout_value"
>>      (procedure "run_genode_until" line 28)
>>      invoked from within
>> "run_genode_until forever"
>>      (file "/home/johanna/Bachelorarbeit/genode/repos/dom0/run/dom0.run" 
>> line 132)
>>      invoked from within
>> "source $include_name"
>>      ("foreach" body line 6)
>>      invoked from within
>> "foreach include_name [get_cmd_arg --include ""] {
>>      # first check if the include name is absolute
>>      if {[string first "/" $include_name] == 0} {
>>          puts ..."
>>      (file "/home/johanna/Bachelorarbeit/genode/tool/run/run" line 642)
>> 
>> ------------------------------------------------------------------------------
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>> patterns at an interface-level. Reveals which users, apps, and protocols are 
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>> reports.http://sdm.link/zohodev2dev
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