diff options
| author | David Howells <dhowells@redhat.com> | 2024-12-04 07:46:40 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-12-09 13:48:26 -0800 |
| commit | 149d002bee706f51772bd320cda90c922844bb0e (patch) | |
| tree | f9b1346a2ad060bd732590cfd7bbadf58d934605 | |
| parent | b7313009c2e56d6e8bffd3d21c1a3a67a9149e2e (diff) | |
rxrpc: Add a tracepoint to show variables pertinent to jumbo packet size
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: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20241204074710.990092-13-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/trace/events/rxrpc.h | 41 | ||||
| -rw-r--r-- | net/rxrpc/call_event.c | 2 |
2 files changed, 43 insertions, 0 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h index 9dcadad88e76..71f07e726a90 100644 --- a/include/trace/events/rxrpc.h +++ b/include/trace/events/rxrpc.h @@ -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), diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c index 3379adfaaf65..1f716f09d441 100644 --- a/net/rxrpc/call_event.c +++ b/net/rxrpc/call_event.c @@ -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, |