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authorDavid Howells <dhowells@redhat.com>2016-09-23 15:58:55 +0300
committerDavid Howells <dhowells@redhat.com>2016-09-23 17:49:19 +0300
commitc6672e3fe4a641bf302d6309ab4d5ee55648e758 (patch)
treef82db3e6572fae4c20d0e83edd5e119928e75243 /include/trace
parent9c7ad434441da6b5d4ac878cac368fbdaec99b56 (diff)
downloadlinux-c6672e3fe4a641bf302d6309ab4d5ee55648e758.tar.xz
rxrpc: Add a tracepoint to log which packets will be retransmitted
Add a tracepoint to log in rxrpc_resend() which packets will be retransmitted. Note that if a positive ACK comes in whilst we have dropped the lock to retransmit another packet, the actual retransmission may not happen, though some of the effects will (such as altering the congestion management). Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/rxrpc.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index d67a8c6b085a..56475497043d 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -543,6 +543,33 @@ TRACE_EVENT(rxrpc_propose_ack,
rxrpc_propose_ack_outcomes[__entry->outcome])
);
+TRACE_EVENT(rxrpc_retransmit,
+ TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t seq, u8 annotation,
+ s64 expiry),
+
+ TP_ARGS(call, seq, annotation, expiry),
+
+ TP_STRUCT__entry(
+ __field(struct rxrpc_call *, call )
+ __field(rxrpc_seq_t, seq )
+ __field(u8, annotation )
+ __field(s64, expiry )
+ ),
+
+ TP_fast_assign(
+ __entry->call = call;
+ __entry->seq = seq;
+ __entry->annotation = annotation;
+ __entry->expiry = expiry;
+ ),
+
+ TP_printk("c=%p q=%x a=%02x xp=%lld",
+ __entry->call,
+ __entry->seq,
+ __entry->annotation,
+ __entry->expiry)
+ );
+
#endif /* _TRACE_RXRPC_H */
/* This part must be outside protection */