linux-kernel - [PATCH v7 04/16] include: trace: Add new scmi_xfer_response

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Message-Id: <20211129191156.29322-5-cristian.marussi@arm.com>
Date:   Mon, 29 Nov 2021 19:11:44 +0000
From:   Cristian Marussi <cristian.marussi@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     sudeep.holla@....com, james.quinlan@...adcom.com,
        Jonathan.Cameron@...wei.com, f.fainelli@...il.com,
        etienne.carriere@...aro.org, vincent.guittot@...aro.org,
        souvik.chakravarty@....com, cristian.marussi@....com
Subject: [PATCH v7 04/16] include: trace: Add new scmi_xfer_response_wait event

Having a new step to trace SCMI stack while it waits for synchronous
responses is useful to analyze system performance when changing waiting
mode between polling and interrupt completion.

Signed-off-by: Cristian Marussi <cristian.marussi@....com>
---
v5 --> v6
- removed atomic flag / poll is enough
- added timeout field
---
 include/trace/events/scmi.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/include/trace/events/scmi.h b/include/trace/events/scmi.h
index f3a4b4d60714..cee4b2b64ae4 100644
--- a/include/trace/events/scmi.h
+++ b/include/trace/events/scmi.h
@@ -33,6 +33,34 @@ TRACE_EVENT(scmi_xfer_begin,
 		__entry->seq, __entry->poll)
 );
 
+TRACE_EVENT(scmi_xfer_response_wait,
+	TP_PROTO(int transfer_id, u8 msg_id, u8 protocol_id, u16 seq,
+		 u32 timeout, bool poll),
+	TP_ARGS(transfer_id, msg_id, protocol_id, seq, timeout, poll),
+
+	TP_STRUCT__entry(
+		__field(int, transfer_id)
+		__field(u8, msg_id)
+		__field(u8, protocol_id)
+		__field(u16, seq)
+		__field(u32, timeout)
+		__field(bool, poll)
+	),
+
+	TP_fast_assign(
+		__entry->transfer_id = transfer_id;
+		__entry->msg_id = msg_id;
+		__entry->protocol_id = protocol_id;
+		__entry->seq = seq;
+		__entry->timeout = timeout;
+		__entry->poll = poll;
+	),
+
+	TP_printk("transfer_id=%d msg_id=%u protocol_id=%u seq=%u tmo_ms=%u poll=%u",
+		__entry->transfer_id, __entry->msg_id, __entry->protocol_id,
+		__entry->seq, __entry->timeout, __entry->poll)
+);
+
 TRACE_EVENT(scmi_xfer_end,
 	TP_PROTO(int transfer_id, u8 msg_id, u8 protocol_id, u16 seq,
 		 int status),
-- 
2.17.1