Re: Tx_bytes

I may be completely wrong, but if you were to look at the tx_bytes that 
you are already looking at, and then look at the statistics that the 
"athstats" utility reports for the wifiX interface you may be able to 
use those numbers to get out of total attempted tx_bytes how many were 
retries and such or at least some sort of better insight into how the 
interface is actually doing with data transmitted.  I know for long 
distance links the ack timeouts need to be increased or the data rate 
never goes up.  You might want to find where the code dispositions data 
it needs to get across but hasn't due to no ack w/in the ack timeout 
time -- see if any stats anywhere are incremented or something.  Have a 
look at the long distance tuning in the FAQs and then search for the 
timeouts in the sourcecode and see where it drops data when acks aren't 
seen etc... 

Again -- I could be way off here as I don't know the guts of MADWIFI, 
but I've been building and using it for kernel 2.4 and 2.6 for several 
years now -- since 2005 since it's got major flexability for doing all 
kinds of cool things!  I really need to switch over to ath5k and ath9k 
now that these are pretty feature rich and fully open etc.

Good luck.

-Eric Malkowski

Mister_New wrote:
> Hello everybody, I have a question and I hope that somebody can help me. I
> know that in netdevice.h file there is the struct net_device_stats with
> rx_bytes and tx_bytes fields. I wrote a program that prints on stdout (every
> x seconds) these two numbers. While for rx_bytes I know that this is the
> number of *correctly* received bytes, I was wondering: how can I know the
> number of total *successfully* transmitted bytes? This question comes from
> the fact that tx_bytes is incremented when is put into the buffer and so it
> counts also retransmissions (and by the way some of them are performed by
> hardware...), but I'm interested in just the correct tx_bytes, because I
> have to compute the goodput. Is there an expert guy (or maybe more than one)
> that knows how to help me? 
>
> Thanks in advance.
>
> Regards.
>
> --
> View this message in context: http://madwifi-users.20070.n2.nabble.com/Tx-bytes-tp7015933p7015933.html
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>
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All the data continuously generated in your IT infrastructure 
contains a definitive record of customers, application performance, 
security threats, fraudulent activity, and more. Splunk takes this 
data and makes sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-novd2d