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Commit 827efed6 authored by David Howells's avatar David Howells
Browse files

rxrpc: Trace resend 



Add a tracepoint to trace packet resend events and to dump the Tx
annotation buffer for added illumination.

Signed-off-by: default avatarDavid Howells <dhowells@rdhat.com>
parent 5d22d47b

include/trace/events/rxrpc.h

+24 −0
Original line number Diff line number Diff line
@@ -420,6 +420,7 @@ rxrpc_rtt_rx_traces; 
rxrpc_timer_traces;

rxrpc_propose_ack_traces;

rxrpc_propose_ack_outcomes;

rxrpc_congest_modes;

rxrpc_congest_changes;



/*
@@ -1229,6 +1230,29 @@ TRACE_EVENT(rxrpc_connect_call, 
		      __entry->call_id)

	    );



TRACE_EVENT(rxrpc_resend,

	    TP_PROTO(struct rxrpc_call *call, int ix),



	    TP_ARGS(call, ix),



	    TP_STRUCT__entry(

		    __field(struct rxrpc_call *,	call		)

		    __field(int,			ix		)

		    __array(u8,				anno, 64	)

			     ),



	    TP_fast_assign(

		    __entry->call = call;

		    __entry->ix = ix;

		    memcpy(__entry->anno, call->rxtx_annotations, 64);

			   ),



	    TP_printk("c=%p ix=%u a=%64phN",

		      __entry->call,

		      __entry->ix,

		      __entry->anno)

	    );



#endif /* _TRACE_RXRPC_H */



/* This part must be outside protection */

net/rxrpc/call_event.c

+1 −0
Original line number Diff line number Diff line
@@ -195,6 +195,7 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j) 
	 * the packets in the Tx buffer we're going to resend and what the new

	 * resend timeout will be.

	 */

	trace_rxrpc_resend(call, (cursor + 1) & RXRPC_RXTX_BUFF_MASK);

	oldest = now;

	for (seq = cursor + 1; before_eq(seq, top); seq++) {

		ix = seq & RXRPC_RXTX_BUFF_MASK;