tree 8ca17608fce76f66375297f2395b0943d8f1e988
parent f07373ead455a396e15a431bc08d8ce1dac6f1cf
author David Howells <dhowells@redhat.com> 1474501313 +0100
committer David Howells <dhowells@redhat.com> 1474503985 +0100

rxrpc: Add per-peer RTT tracker

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>