diff options
| author | David Howells <dhowells@redhat.com> | 2017-04-06 10:12:00 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2017-04-06 11:10:41 +0100 |
| commit | 740586d290cb43d941c10274f2b65976bd94dacd (patch) | |
| tree | d920549935e9840b4da7fed2cb6e0ba94d82a58d | |
| parent | 005ede286f1b801be21d9667d6080bca79ef2a26 (diff) | |
rxrpc: Trace changes in a call's receive window size
Add a tracepoint (rxrpc_rx_rwind_change) to log changes in a call's receive
window size as imposed by the peer through an ACK packet.
Signed-off-by: David Howells <dhowells@redhat.com>
| -rw-r--r-- | include/trace/events/rxrpc.h | 27 | ||||
| -rw-r--r-- | net/rxrpc/input.c | 2 |
2 files changed, 29 insertions, 0 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h index 85e0148c88a8..15ba7387c243 100644 --- a/include/trace/events/rxrpc.h +++ b/include/trace/events/rxrpc.h @@ -707,6 +707,33 @@ TRACE_EVENT(rxrpc_rx_abort, __entry->abort_code) ); +TRACE_EVENT(rxrpc_rx_rwind_change, + TP_PROTO(struct rxrpc_call *call, rxrpc_serial_t serial, + u32 rwind, bool wake), + + TP_ARGS(call, serial, rwind, wake), + + TP_STRUCT__entry( + __field(struct rxrpc_call *, call ) + __field(rxrpc_serial_t, serial ) + __field(u32, rwind ) + __field(bool, wake ) + ), + + TP_fast_assign( + __entry->call = call; + __entry->serial = serial; + __entry->rwind = rwind; + __entry->wake = wake; + ), + + TP_printk("c=%p %08x rw=%u%s", + __entry->call, + __entry->serial, + __entry->rwind, + __entry->wake ? " wake" : "") + ); + TRACE_EVENT(rxrpc_tx_data, TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t seq, rxrpc_serial_t serial, u8 flags, bool retrans, bool lose), diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index 241e989597f2..45dba732a3b4 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -665,6 +665,8 @@ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb, rwind = RXRPC_RXTX_BUFF_SIZE - 1; if (rwind > call->tx_winsize) wake = true; + trace_rxrpc_rx_rwind_change(call, sp->hdr.serial, + ntohl(ackinfo->rwind), wake); call->tx_winsize = rwind; } |