I don't know the purpose of "Port manager per" process, to answer your first question, but for your second: the first two numbers, 58%/50%, normally represent total CPU and interrupt CPU. The second, interrupt, should be fast path software forwarding of packets. The difference, in this case 8%, would be all other software processes. I.e. the total of all the process CPU percentages should be about 8%.
On software based routers, it is and it's the ideal. With your 6513, I'm unsure since much of normal forwarding is done within hardware. On this system, it might indicate forwarding that couldn't be done by the hardware and had to be done by software, although in an optimal switching path, or it might indicate a pretty busy sup720. Perhaps someone else will respond on high "interrupt" CPU meaning on the 6500 (or 7600) platform.
It might if the issue is indeed the sup720 has a high load. (Not real hard to do today with high density gig line cards.)
Also if your line cards support DFCs, not all do. The best would be the CEF720 cards, since they would have the most bandwidth to the sup720 fabric, but I believe except for the 24 port SFP card (6724-SFP), they require dual fabric connections which your 6513 only supports in slots 9-13.
In that case, DFCs in one or more cards might help. If most of the load was on just one or a couple of cards, those would likely obtain the most benefit with DFC on their cards. I.e., might not be real need or benefit to upgrade all cards.
However, would still like to see someone more familar with 6500 series comment. Also, I think other commands (sh controller?) might indicate further where (what cards or ports) your 6513 might be busy.
We are pleased to announce availability of Beta software for 16.6.3.
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