linux-kernel - [PATCH blktrace v3 18/20] blkparse: parse zone (un)plug actions

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Message-ID: <20251015105658.527262-19-johannes.thumshirn@wdc.com>
Date: Wed, 15 Oct 2025 12:56:56 +0200
From: Johannes Thumshirn <johannes.thumshirn@....com>
To: axboe@...nel.dk
Cc: chaitanyak@...dia.com,
	dlemoal@...nel.org,
	hare@...e.de,
	hch@....de,
	john.g.garry@...cle.com,
	linux-block@...r.kernel.org,
	linux-btrace@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	martin.petersen@...cle.com,
	mathieu.desnoyers@...icios.com,
	mhiramat@...nel.org,
	naohiro.aota@....com,
	rostedt@...dmis.org,
	shinichiro.kawasaki@....com,
	Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH blktrace v3 18/20] blkparse: parse zone (un)plug actions

Parse Zone Write Plugging plug and unplug actions in blkparse.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
---
 blkparse.c     |  7 +++++++
 blkparse_fmt.c | 18 ++++++++++++++++++
 blktrace_api.h |  2 ++
 3 files changed, 27 insertions(+)

diff --git a/blkparse.c b/blkparse.c
index 2eec3a9..76c775b 100644
--- a/blkparse.c
+++ b/blkparse.c
@@ -1722,6 +1722,13 @@ static void dump_trace_fs(struct blk_io_trace2 *t, struct per_dev_info *pdi,
 			account_unplug(t, pci, 1);
 			log_unplug(pci, t, "UT");
 			break;
+		case __BLK_TA_ZONE_PLUG:
+			log_action(pci, t, "ZP");
+			break;
+		case __BLK_TA_ZONE_UNPLUG:
+			account_unplug(t, pci, 0);
+			log_unplug(pci, t, "ZU");
+			break;
 		case __BLK_TA_SPLIT:
 			log_track_split(pdi, t);
 			log_split(pci, t, "X");
diff --git a/blkparse_fmt.c b/blkparse_fmt.c
index f93addb..80e02fc 100644
--- a/blkparse_fmt.c
+++ b/blkparse_fmt.c
@@ -301,6 +301,21 @@ static char *parse_field(char *act, struct per_cpu_info *pci,
 	return p;
 }
 
+static void process_zoned(char *act, struct blk_io_trace2 *t, char *name)
+{
+	switch (act[1]) {
+	case 'P': /* Zone Plug */
+		fprintf(ofp, "[%s]\n", name);
+		break;
+	case 'U': /* Zone Unplug */
+		fprintf(ofp, "[%s] %u\n", name, get_pdu_int(t));
+		break;
+	default:
+		fprintf(stderr, "Unknown zoned action %c\n", act[1]);
+		break;
+	}
+}
+
 static void process_default(char *act, struct per_cpu_info *pci,
 			    struct blk_io_trace2 *t, unsigned long long elapsed,
 			    int pdu_len, unsigned char *pdu_buf)
@@ -429,6 +444,9 @@ static void process_default(char *act, struct per_cpu_info *pci,
 		fprintf(ofp, "%*s\n", pdu_len, pdu_buf);
 		break;
 
+	case 'Z':	/* Zoned command */
+		process_zoned(act, t, name);
+		break;
 	default:
 		fprintf(stderr, "Unknown action %c\n", act[0]);
 		break;
diff --git a/blktrace_api.h b/blktrace_api.h
index 04e81de..8db24fc 100644
--- a/blktrace_api.h
+++ b/blktrace_api.h
@@ -60,6 +60,8 @@ enum {
 	__BLK_TA_REMAP,			/* bio was remapped */
 	__BLK_TA_ABORT,			/* request aborted */
 	__BLK_TA_DRV_DATA,		/* binary driver data */
+	__BLK_TA_ZONE_PLUG,		/* zone write plug was plugged */
+	__BLK_TA_ZONE_UNPLUG,		/* zone write plug was unplugged */
 	__BLK_TA_ZONE_MGMT,		/* zone management command was issued */
 	__BLK_TA_CGROUP = 1 << 8,
 };
-- 
2.51.0