rxrpc: Add per-peer RTT tracker

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Add a function to track the average RTT for a peer.  Sources of RTT data
will be added in subsequent patches.

The RTT data will be useful in the future for determining resend timeouts
and for handling the slow-start part of the Rx protocol.

Also add a pair of tracepoints, one to log transmissions to elicit a
response for RTT purposes and one to log responses that contribute RTT
data.

Signed-off-by: David Howells <dhowells@redhat.com>

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This commit is contained in:

David Howells 2016-09-22 00:41:53 +01:00

parent f07373ead4

commit cf1a6474f8

4 changed files with 131 additions and 4 deletions

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61

include/trace/events/rxrpc.h

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25

net/rxrpc/ar-internal.h

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8

net/rxrpc/misc.c

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41

net/rxrpc/peer_event.c

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