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authorHitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>2015-11-06 16:32:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-06 17:50:42 -0800
commit44fda114601fa5edebeacecb265f09d802670bc0 (patch)
treece6ceacb2c796282079e1bf377bda5267697fd67 /include
parent58497703837048ac501ce56056eb74b4361108fc (diff)
downloadlinux-stericsson-44fda114601fa5edebeacecb265f09d802670bc0.tar.gz
nilfs2: add a tracepoint for transaction events
This patch adds a tracepoint for transaction events of nilfs. With the tracepoint, these events can be tracked: begin, abort, commit, trylock, lock, and unlock. Basically, these events have corresponding functions e.g. begin event corresponds nilfs_transaction_begin(). The unlock event is an exception. It corresponds to the iteration in nilfs_transaction_lock(). Only one tracepoint is introcued: nilfs2_transaction_transition. The above events are distinguished with newly introduced enum. With this tracepoint, we can analyse a critical section of segment constructoin. Sample output by tpoint of perf-tools: cp-4457 [000] ...1 63.266220: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800bf5ccc58 count = 1 flags = 9 state = BEGIN cp-4457 [000] ...1 63.266221: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800bf5ccc58 count = 0 flags = 9 state = COMMIT cp-4457 [000] ...1 63.266221: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800bf5ccc58 count = 0 flags = 9 state = COMMIT segctord-4371 [001] ...1 68.261196: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 10 state = TRYLOCK segctord-4371 [001] ...1 68.261280: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 10 state = LOCK segctord-4371 [001] ...1 68.261877: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 1 flags = 10 state = BEGIN segctord-4371 [001] ...1 68.262116: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 18 state = COMMIT segctord-4371 [001] ...1 68.265032: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 18 state = UNLOCK segctord-4371 [001] ...1 132.376847: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 10 state = TRYLOCK This patch also does trivial cleaning of comma usage in collection stage transition event for consistent coding style. Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/trace/events/nilfs2.h53
1 files changed, 53 insertions, 0 deletions
diff --git a/include/trace/events/nilfs2.h b/include/trace/events/nilfs2.h
index 573da00a486d..e5649ac211ca 100644
--- a/include/trace/events/nilfs2.h
+++ b/include/trace/events/nilfs2.h
@@ -42,6 +42,59 @@ TRACE_EVENT(nilfs2_collection_stage_transition,
show_collection_stage(__entry->stage))
);
+#ifndef TRACE_HEADER_MULTI_READ
+enum nilfs2_transaction_transition_state {
+ TRACE_NILFS2_TRANSACTION_BEGIN,
+ TRACE_NILFS2_TRANSACTION_COMMIT,
+ TRACE_NILFS2_TRANSACTION_ABORT,
+ TRACE_NILFS2_TRANSACTION_TRYLOCK,
+ TRACE_NILFS2_TRANSACTION_LOCK,
+ TRACE_NILFS2_TRANSACTION_UNLOCK,
+};
+#endif
+
+#define show_transaction_state(type) \
+ __print_symbolic(type, \
+ { TRACE_NILFS2_TRANSACTION_BEGIN, "BEGIN" }, \
+ { TRACE_NILFS2_TRANSACTION_COMMIT, "COMMIT" }, \
+ { TRACE_NILFS2_TRANSACTION_ABORT, "ABORT" }, \
+ { TRACE_NILFS2_TRANSACTION_TRYLOCK, "TRYLOCK" }, \
+ { TRACE_NILFS2_TRANSACTION_LOCK, "LOCK" }, \
+ { TRACE_NILFS2_TRANSACTION_UNLOCK, "UNLOCK" })
+
+TRACE_EVENT(nilfs2_transaction_transition,
+ TP_PROTO(struct super_block *sb,
+ struct nilfs_transaction_info *ti,
+ int count,
+ unsigned int flags,
+ enum nilfs2_transaction_transition_state state),
+
+ TP_ARGS(sb, ti, count, flags, state),
+
+ TP_STRUCT__entry(
+ __field(void *, sb)
+ __field(void *, ti)
+ __field(int, count)
+ __field(unsigned int, flags)
+ __field(int, state)
+ ),
+
+ TP_fast_assign(
+ __entry->sb = sb;
+ __entry->ti = ti;
+ __entry->count = count;
+ __entry->flags = flags;
+ __entry->state = state;
+ ),
+
+ TP_printk("sb = %p ti = %p count = %d flags = %x state = %s",
+ __entry->sb,
+ __entry->ti,
+ __entry->count,
+ __entry->flags,
+ show_transaction_state(__entry->state))
+);
+
#endif /* _TRACE_NILFS2_H */
/* This part must be outside protection */