[RFC][PATCH] tracing: block events

From: Peter Zijlstra
Date: Wed Mar 04 2009 - 10:46:00 EST

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Subject: tracing: block events
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Date: Wed Mar 04 15:09:43 CET 2009

Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
---
include/trace/block.h | 69 --------------
include/trace/block_event_types.h | 177 ++++++++++++++++++++++++++++++++++++++
include/trace/trace_event_types.h | 1
include/trace/trace_events.h | 1
4 files changed, 180 insertions(+), 68 deletions(-)

Index: linux-2.6/include/trace/block.h
===================================================================
--- linux-2.6.orig/include/trace/block.h
+++ linux-2.6/include/trace/block.h
@@ -4,73 +4,6 @@
#include <linux/blkdev.h>
#include <linux/tracepoint.h>

-DECLARE_TRACE(block_rq_abort,
- TPPROTO(struct request_queue *q, struct request *rq),
- TPARGS(q, rq));
-
-DECLARE_TRACE(block_rq_insert,
- TPPROTO(struct request_queue *q, struct request *rq),
- TPARGS(q, rq));
-
-DECLARE_TRACE(block_rq_issue,
- TPPROTO(struct request_queue *q, struct request *rq),
- TPARGS(q, rq));
-
-DECLARE_TRACE(block_rq_requeue,
- TPPROTO(struct request_queue *q, struct request *rq),
- TPARGS(q, rq));
-
-DECLARE_TRACE(block_rq_complete,
- TPPROTO(struct request_queue *q, struct request *rq),
- TPARGS(q, rq));
-
-DECLARE_TRACE(block_bio_bounce,
- TPPROTO(struct request_queue *q, struct bio *bio),
- TPARGS(q, bio));
-
-DECLARE_TRACE(block_bio_complete,
- TPPROTO(struct request_queue *q, struct bio *bio),
- TPARGS(q, bio));
-
-DECLARE_TRACE(block_bio_backmerge,
- TPPROTO(struct request_queue *q, struct bio *bio),
- TPARGS(q, bio));
-
-DECLARE_TRACE(block_bio_frontmerge,
- TPPROTO(struct request_queue *q, struct bio *bio),
- TPARGS(q, bio));
-
-DECLARE_TRACE(block_bio_queue,
- TPPROTO(struct request_queue *q, struct bio *bio),
- TPARGS(q, bio));
-
-DECLARE_TRACE(block_getrq,
- TPPROTO(struct request_queue *q, struct bio *bio, int rw),
- TPARGS(q, bio, rw));
-
-DECLARE_TRACE(block_sleeprq,
- TPPROTO(struct request_queue *q, struct bio *bio, int rw),
- TPARGS(q, bio, rw));
-
-DECLARE_TRACE(block_plug,
- TPPROTO(struct request_queue *q),
- TPARGS(q));
-
-DECLARE_TRACE(block_unplug_timer,
- TPPROTO(struct request_queue *q),
- TPARGS(q));
-
-DECLARE_TRACE(block_unplug_io,
- TPPROTO(struct request_queue *q),
- TPARGS(q));
-
-DECLARE_TRACE(block_split,
- TPPROTO(struct request_queue *q, struct bio *bio, unsigned int pdu),
- TPARGS(q, bio, pdu));
-
-DECLARE_TRACE(block_remap,
- TPPROTO(struct request_queue *q, struct bio *bio, dev_t dev,
- sector_t from, sector_t to),
- TPARGS(q, bio, dev, from, to));
+#include <trace/block_event_types.h>

#endif
Index: linux-2.6/include/trace/block_event_types.h
===================================================================
--- /dev/null
+++ linux-2.6/include/trace/block_event_types.h
@@ -0,0 +1,177 @@
+
+#ifndef TRACE_EVENT_FORMAT
+# error Do not include this file directly.
+# error Unless you know what you are doing.
+#endif
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM block
+
+#ifdef CONFIG_BLK_DEV_IO_TRACE
+#define Q_DEV(q) (q->bt ? q->bt->dev : 0)
+#else
+#define Q_DEV(q) 0
+#endif
+
+TRACE_FORMAT(block_rq_abort,
+ TPPROTO(struct request_queue *q, struct request *rq),
+ TPARGS(q, rq),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ rq->cmd_flags & __REQ_RW ? 'W' : 'R',
+ blk_pc_request(rq) ? 0 : rq->hard_sector,
+ blk_pc_request(rq) ? rq->data_len : rq->hard_nr_sectors << 9)
+ );
+
+TRACE_FORMAT(block_rq_insert,
+ TPPROTO(struct request_queue *q, struct request *rq),
+ TPARGS(q, rq),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ rq->cmd_flags & __REQ_RW ? 'W' : 'R',
+ blk_pc_request(rq) ? 0 : rq->hard_sector,
+ blk_pc_request(rq) ? rq->data_len : rq->hard_nr_sectors << 9)
+ );
+
+TRACE_FORMAT(block_rq_issue,
+ TPPROTO(struct request_queue *q, struct request *rq),
+ TPARGS(q, rq),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ rq->cmd_flags & __REQ_RW ? 'W' : 'R',
+ blk_pc_request(rq) ? 0 : rq->hard_sector,
+ blk_pc_request(rq) ? rq->data_len : rq->hard_nr_sectors << 9)
+ );
+
+TRACE_FORMAT(block_rq_requeue,
+ TPPROTO(struct request_queue *q, struct request *rq),
+ TPARGS(q, rq),
+ TPFMT("%d:%d %c %llu + %u [%d]",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ rq->cmd_flags & __REQ_RW ? 'W' : 'R',
+ blk_pc_request(rq) ? 0 : rq->hard_sector,
+ blk_pc_request(rq) ? rq->data_len : rq->hard_nr_sectors << 9,
+ rq->errors)
+ );
+
+TRACE_FORMAT(block_rq_complete,
+ TPPROTO(struct request_queue *q, struct request *rq),
+ TPARGS(q, rq),
+ TPFMT("%d:%d %c %llu + %u [%d]",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ rq->cmd_flags & __REQ_RW ? 'W' : 'R',
+ blk_pc_request(rq) ? 0 : rq->hard_sector,
+ blk_pc_request(rq) ? rq->data_len : rq->hard_nr_sectors << 9,
+ rq->errors)
+ );
+
+TRACE_FORMAT(block_bio_bounce,
+ TPPROTO(struct request_queue *q, struct bio *bio),
+ TPARGS(q, bio),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ bio->bi_rw & WRITE ? 'W' : 'R',
+ bio->bi_sector, bio->bi_size)
+ );
+
+TRACE_FORMAT(block_bio_complete,
+ TPPROTO(struct request_queue *q, struct bio *bio),
+ TPARGS(q, bio),
+ TPFMT("%d:%d %c %llu + %u [%d]",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ bio->bi_rw & WRITE ? 'W' : 'R',
+ bio->bi_sector, bio->bi_size,
+ !bio_flagged(bio, BIO_UPTODATE))
+ );
+
+TRACE_FORMAT(block_bio_backmerge,
+ TPPROTO(struct request_queue *q, struct bio *bio),
+ TPARGS(q, bio),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ bio->bi_rw & WRITE ? 'W' : 'R',
+ bio->bi_sector, bio->bi_size)
+ );
+
+TRACE_FORMAT(block_bio_frontmerge,
+ TPPROTO(struct request_queue *q, struct bio *bio),
+ TPARGS(q, bio),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ bio->bi_rw & WRITE ? 'W' : 'R',
+ bio->bi_sector, bio->bi_size)
+ );
+
+TRACE_FORMAT(block_bio_queue,
+ TPPROTO(struct request_queue *q, struct bio *bio),
+ TPARGS(q, bio),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ bio->bi_rw & WRITE ? 'W' : 'R',
+ bio->bi_sector, bio->bi_size)
+ );
+
+TRACE_FORMAT(block_getrq,
+ TPPROTO(struct request_queue *q, struct bio *bio, int rw),
+ TPARGS(q, bio, rw),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ (bio ? (bio->bi_rw & WRITE) : rw) ? 'W' : 'R',
+ bio ? bio->bi_sector : 0,
+ bio ? bio->bi_size : 0)
+ );
+
+TRACE_FORMAT(block_sleeprq,
+ TPPROTO(struct request_queue *q, struct bio *bio, int rw),
+ TPARGS(q, bio, rw),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ (bio ? (bio->bi_rw & WRITE) : rw) ? 'W' : 'R',
+ bio ? bio->bi_sector : 0,
+ bio ? bio->bi_size : 0)
+ );
+
+TRACE_FORMAT(block_plug,
+ TPPROTO(struct request_queue *q),
+ TPARGS(q),
+ TPFMT("%d:%d",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)))
+ );
+
+TRACE_FORMAT(block_unplug_timer,
+ TPPROTO(struct request_queue *q),
+ TPARGS(q),
+ TPFMT("%d:%d",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)))
+ );
+
+TRACE_FORMAT(block_unplug_io,
+ TPPROTO(struct request_queue *q),
+ TPARGS(q),
+ TPFMT("%d:%d",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)))
+ );
+
+TRACE_FORMAT(block_split,
+ TPPROTO(struct request_queue *q, struct bio *bio, unsigned int pdu),
+ TPARGS(q, bio, pdu),
+ TPFMT("%d:%d %c %llu + %u",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ bio->bi_rw & WRITE ? 'W' : 'R',
+ bio->bi_sector, bio->bi_size)
+ ); /* FIXME add pdu info */
+
+TRACE_FORMAT(block_remap,
+ TPPROTO(struct request_queue *q, struct bio *bio, dev_t dev,
+ sector_t from, sector_t to),
+ TPARGS(q, bio, dev, from, to),
+ TPFMT("%d:%d %c %llu + %u -> (%d:%d) %llu",
+ MAJOR(Q_DEV(q)), MINOR(Q_DEV(q)),
+ bio->bi_rw & WRITE ? 'W' : 'R',
+ from, bio->bi_size,
+ MAJOR(dev), MINOR(dev), to)
+ );
+
+#undef Q_DEV
+
+#undef TRACE_SYSTEM
Index: linux-2.6/include/trace/trace_event_types.h
===================================================================
--- linux-2.6.orig/include/trace/trace_event_types.h
+++ linux-2.6/include/trace/trace_event_types.h
@@ -3,3 +3,4 @@
#include <trace/sched_event_types.h>
#include <trace/irq_event_types.h>
#include <trace/lockdep_event_types.h>
+#include <trace/block_event_types.h>
Index: linux-2.6/include/trace/trace_events.h
===================================================================
--- linux-2.6.orig/include/trace/trace_events.h
+++ linux-2.6/include/trace/trace_events.h
@@ -3,3 +3,4 @@
#include <trace/sched.h>
#include <trace/irq.h>
#include <trace/lockdep.h>
+#include <trace/block.h>

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Next message: Serge E. Hallyn: "[PATCH 1/1] ipc namespace: initialize init_ipc_ns.count to 1"
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Next in thread: Steven Rostedt: "Re: [RFC][PATCH] tracing: block events"
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