@@ -903,6 +903,47 @@ TRACE_EVENT(rxrpc_txqueue,
__entry->tx_winsize)
);
+TRACE_EVENT(rxrpc_transmit,
+ TP_PROTO(struct rxrpc_call *call, int space),
+
+ TP_ARGS(call, space),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, call)
+ __field(rxrpc_seq_t, seq)
+ __field(u16, space)
+ __field(u16, tx_winsize)
+ __field(u16, cong_cwnd)
+ __field(u16, cong_extra)
+ __field(u16, in_flight)
+ __field(u16, prepared)
+ __field(u16, pmtud_jumbo)
+ ),
+
+ TP_fast_assign(
+ __entry->call = call->debug_id;
+ __entry->seq = call->tx_bottom;
+ __entry->space = space;
+ __entry->tx_winsize = call->tx_winsize;
+ __entry->cong_cwnd = call->cong_cwnd;
+ __entry->cong_extra = call->cong_extra;
+ __entry->prepared = call->tx_prepared - call->tx_bottom;
+ __entry->in_flight = call->tx_top - call->acks_hard_ack;
+ __entry->pmtud_jumbo = call->peer->pmtud_jumbo;
+ ),
+
+ TP_printk("c=%08x q=%08x sp=%u tw=%u cw=%u+%u pr=%u if=%u pj=%u",
+ __entry->call,
+ __entry->seq,
+ __entry->space,
+ __entry->tx_winsize,
+ __entry->cong_cwnd,
+ __entry->cong_extra,
+ __entry->prepared,
+ __entry->in_flight,
+ __entry->pmtud_jumbo)
+ );
+
TRACE_EVENT(rxrpc_rx_data,
TP_PROTO(unsigned int call, rxrpc_seq_t seq,
rxrpc_serial_t serial, u8 flags),
@@ -259,6 +259,8 @@ static void rxrpc_decant_prepared_tx(struct rxrpc_call *call)
if (list_empty(&call->tx_sendmsg))
break;
+ trace_rxrpc_transmit(call, space);
+
spin_lock(&call->tx_lock);
do {
txb = list_first_entry(&call->tx_sendmsg,
Add a tracepoint to be called right before packets are transmitted for the first time that shows variable values that are pertinent to how many subpackets will be added to a jumbo DATA packet. Signed-off-by: David Howells <dhowells@redhat.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: "David S. Miller" <davem@davemloft.net> cc: Eric Dumazet <edumazet@google.com> cc: Jakub Kicinski <kuba@kernel.org> cc: Paolo Abeni <pabeni@redhat.com> cc: linux-afs@lists.infradead.org cc: netdev@vger.kernel.org --- include/trace/events/rxrpc.h | 41 ++++++++++++++++++++++++++++++++++++ net/rxrpc/call_event.c | 2 ++ 2 files changed, 43 insertions(+)