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ds patches for statistics

to test the performances of a Linux Diffserv router (Linux 2.2.10+DS6)
we have implemented new statistics  taken from the kernel for the tc:
-queuedelay is the internal queueing delay experienced by packets;
-rate is the outgoing packets rate.
We have used the function  do_gettimeofday to take the sk_buff stamp so
that we have better precision and resolution.
I have attached the patches for linux-2.2.10 and tc.
Ideas comments and suggestions will be welcome.

Giacomo Sergio