[AFS3-std] Request for new fields in rx_statistics

[Jeffrey Altman]

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Michael Meffie wrote:
> The number of spares is reduced to 2 integers by this change,
> but since this is not an RX call, but rather the payload of an
> rx debug packet, I believe addtional integers could be added
> up to the limit imposed on the packet size.
There is not method of negotiating the size of the rx_debugStats
structure used in
the RX_DEBUGI_GETSTATS debug call.  As a result it is not possible to
increase
the length of this structure and ensure that a peer with the new
structure can send
a RX_DEBUGI_GETSTATS response to a peer that only knows the old structure.

If we run out of space we will have to implement RX_DEBUGI_GETSTATS2.

As for whether or not "the number of ack packets that have been delayed
due to excessive
aborts" should be sent or not, I wonder if that number is really a
useful number from the
perspective of debugging the server state.  From my perspective the
question that one is
trying to answer is whether or not a particular rx_connection or rx_peer
is being throttled.
I don't think reporting the number of delays will help address that
question.

To address the question I have posed statistics would have to be
collected per connection
and reported in the rx_debugConn structure which currently has 9
spares.  The rx_debugPeer
structure currently has 10 spares.

I am currently opposed to modifying the rx_debugStats because I do not
understand
what question it could solve that would be worth asking. 

Jeffrey Altman




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