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authorDavid Howells <dhowells@redhat.com>2022-11-11 14:47:35 +0100
committerDavid Howells <dhowells@redhat.com>2022-12-01 14:36:42 +0100
commit32cf8edb079a6a687a2b5dba39a813a0bbd0ddf9 (patch)
treeacbf8a435043daa16df69c2d9f2fd3ea769cc788 /include/trace
parentrxrpc: Remove the _bh annotation from all the spinlocks (diff)
downloadlinux-32cf8edb079a6a687a2b5dba39a813a0bbd0ddf9.tar.xz
linux-32cf8edb079a6a687a2b5dba39a813a0bbd0ddf9.zip
rxrpc: Trace/count transmission underflows and cwnd resets
Add a tracepoint to log when a cwnd reset occurs due to lack of transmission on a call. Add stat counters to count transmission underflows (ie. when we have tx window space, but sendmsg doesn't manage to keep up), cwnd resets and transmission failures. Signed-off-by: David Howells <dhowells@redhat.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: linux-afs@lists.infradead.org
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/rxrpc.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index c49b0c233594..b41e913ae78a 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -1446,6 +1446,44 @@ TRACE_EVENT(rxrpc_congest,
__entry->sum.retrans_timeo ? " rTxTo" : "")
);
+TRACE_EVENT(rxrpc_reset_cwnd,
+ TP_PROTO(struct rxrpc_call *call, ktime_t now),
+
+ TP_ARGS(call, now),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, call )
+ __field(enum rxrpc_congest_mode, mode )
+ __field(unsigned short, cwnd )
+ __field(unsigned short, extra )
+ __field(rxrpc_seq_t, hard_ack )
+ __field(rxrpc_seq_t, prepared )
+ __field(ktime_t, since_last_tx )
+ __field(bool, has_data )
+ ),
+
+ TP_fast_assign(
+ __entry->call = call->debug_id;
+ __entry->mode = call->cong_mode;
+ __entry->cwnd = call->cong_cwnd;
+ __entry->extra = call->cong_extra;
+ __entry->hard_ack = call->acks_hard_ack;
+ __entry->prepared = call->tx_prepared - call->tx_bottom;
+ __entry->since_last_tx = ktime_sub(now, call->tx_last_sent);
+ __entry->has_data = !list_empty(&call->tx_sendmsg);
+ ),
+
+ TP_printk("c=%08x q=%08x %s cw=%u+%u pr=%u tm=%llu d=%u",
+ __entry->call,
+ __entry->hard_ack,
+ __print_symbolic(__entry->mode, rxrpc_congest_modes),
+ __entry->cwnd,
+ __entry->extra,
+ __entry->prepared,
+ ktime_to_ns(__entry->since_last_tx),
+ __entry->has_data)
+ );
+
TRACE_EVENT(rxrpc_disconnect_call,
TP_PROTO(struct rxrpc_call *call),