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 <om.turyx@xxxxxxxxx> 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.
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Thank You,
Siddhesh M. Divekar.
