Hi Om, This is a naive advice though.
You could add "printk" and some counters in the networking code where the checksum is being computed. Then in the var/log see these counters, but this is bad bcoz u wil have to recomile ur code. Let me know if u get any short cut to this. thanks, siddhesh. On Mon, Jan 5, 2009 at 11:13 AM, Om <[email protected]> wrote: > Hi, > I just completed a network driver for a 100Mbps controller. for performance > measurement, when I run netperf and netserver with UDP_STREAM, I get 98Mbps. > But with TCP, I get 0.03 Mbps. > > I think tcp checksumming fails a lot. > > How do I go about finding out the problem? What are the tools that helps me > to diagnose it and peep into the network subsystem in linux? > > I would like to get info on > 1. how many packets made into stack? > 2. of them, how many failed checksum? > 3. How many did the application receive? > > ..etc. > netstat -s or iptstate did not tell me all these. > > Thanks, > Om. > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to [email protected] > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- Thank You, Siddhesh M. Divekar.
