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| author | David Howells <dhowells@redhat.com> | 2016-09-22 00:41:53 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2016-09-22 01:26:25 +0100 |
| commit | cf1a6474f80735ff4a5d99f3dd68a94dbec8455f (patch) | |
| tree | 8ca17608fce76f66375297f2395b0943d8f1e988 /include/trace | |
| parent | f07373ead455a396e15a431bc08d8ce1dac6f1cf (diff) | |
| download | linux-cf1a6474f80735ff4a5d99f3dd68a94dbec8455f.tar.gz linux-cf1a6474f80735ff4a5d99f3dd68a94dbec8455f.tar.bz2 linux-cf1a6474f80735ff4a5d99f3dd68a94dbec8455f.zip | |
rxrpc: Add per-peer RTT tracker
Add a function to track the average RTT for a peer. Sources of RTT data
will be added in subsequent patches.
The RTT data will be useful in the future for determining resend timeouts
and for handling the slow-start part of the Rx protocol.
Also add a pair of tracepoints, one to log transmissions to elicit a
response for RTT purposes and one to log responses that contribute RTT
data.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/rxrpc.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h index 75a5d8bf50e1..e8f2afbbe0bf 100644 --- a/include/trace/events/rxrpc.h +++ b/include/trace/events/rxrpc.h @@ -353,6 +353,67 @@ TRACE_EVENT(rxrpc_recvmsg, __entry->ret) ); +TRACE_EVENT(rxrpc_rtt_tx, + TP_PROTO(struct rxrpc_call *call, enum rxrpc_rtt_tx_trace why, + rxrpc_serial_t send_serial), + + TP_ARGS(call, why, send_serial), + + TP_STRUCT__entry( + __field(struct rxrpc_call *, call ) + __field(enum rxrpc_rtt_tx_trace, why ) + __field(rxrpc_serial_t, send_serial ) + ), + + TP_fast_assign( + __entry->call = call; + __entry->why = why; + __entry->send_serial = send_serial; + ), + + TP_printk("c=%p %s sr=%08x", + __entry->call, + rxrpc_rtt_tx_traces[__entry->why], + __entry->send_serial) + ); + +TRACE_EVENT(rxrpc_rtt_rx, + TP_PROTO(struct rxrpc_call *call, enum rxrpc_rtt_rx_trace why, + rxrpc_serial_t send_serial, rxrpc_serial_t resp_serial, + s64 rtt, u8 nr, s64 avg), + + TP_ARGS(call, why, send_serial, resp_serial, rtt, nr, avg), + + TP_STRUCT__entry( + __field(struct rxrpc_call *, call ) + __field(enum rxrpc_rtt_rx_trace, why ) + __field(u8, nr ) + __field(rxrpc_serial_t, send_serial ) + __field(rxrpc_serial_t, resp_serial ) + __field(s64, rtt ) + __field(u64, avg ) + ), + + TP_fast_assign( + __entry->call = call; + __entry->why = why; + __entry->send_serial = send_serial; + __entry->resp_serial = resp_serial; + __entry->rtt = rtt; + __entry->nr = nr; + __entry->avg = avg; + ), + + TP_printk("c=%p %s sr=%08x rr=%08x rtt=%lld nr=%u avg=%lld", + __entry->call, + rxrpc_rtt_rx_traces[__entry->why], + __entry->send_serial, + __entry->resp_serial, + __entry->rtt, + __entry->nr, + __entry->avg) + ); + #endif /* _TRACE_RXRPC_H */ /* This part must be outside protection */ |