db2trc fmt trc.dmp trc.fmt
db2trc flw trc.dmp trc.flw

flw gives you the flow
fmt gives you point information at specific tracepoints.

Now, the amount of what you can read depends.
At some deeper level db2trc is meant for support and development rather
than the casual user.
But you can see where time goes, memory etc, etc...
Cheers
Serge