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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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44fda11460
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>
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM nilfs2
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#if !defined(_TRACE_NILFS2_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_NILFS2_H
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#include <linux/tracepoint.h>
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struct nilfs_sc_info;
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#define show_collection_stage(type) \
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__print_symbolic(type, \
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{ NILFS_ST_INIT, "ST_INIT" }, \
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{ NILFS_ST_GC, "ST_GC" }, \
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{ NILFS_ST_FILE, "ST_FILE" }, \
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{ NILFS_ST_IFILE, "ST_IFILE" }, \
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{ NILFS_ST_CPFILE, "ST_CPFILE" }, \
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{ NILFS_ST_SUFILE, "ST_SUFILE" }, \
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{ NILFS_ST_DAT, "ST_DAT" }, \
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{ NILFS_ST_SR, "ST_SR" }, \
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{ NILFS_ST_DSYNC, "ST_DSYNC" }, \
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{ NILFS_ST_DONE, "ST_DONE"})
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TRACE_EVENT(nilfs2_collection_stage_transition,
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TP_PROTO(struct nilfs_sc_info *sci),
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TP_ARGS(sci),
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TP_STRUCT__entry(
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__field(void *, sci)
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__field(int, stage)
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),
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TP_fast_assign(
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__entry->sci = sci;
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__entry->stage = sci->sc_stage.scnt;
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),
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TP_printk("sci = %p stage = %s",
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__entry->sci,
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show_collection_stage(__entry->stage))
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);
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#ifndef TRACE_HEADER_MULTI_READ
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enum nilfs2_transaction_transition_state {
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TRACE_NILFS2_TRANSACTION_BEGIN,
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TRACE_NILFS2_TRANSACTION_COMMIT,
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TRACE_NILFS2_TRANSACTION_ABORT,
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TRACE_NILFS2_TRANSACTION_TRYLOCK,
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TRACE_NILFS2_TRANSACTION_LOCK,
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TRACE_NILFS2_TRANSACTION_UNLOCK,
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};
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#endif
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#define show_transaction_state(type) \
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__print_symbolic(type, \
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{ TRACE_NILFS2_TRANSACTION_BEGIN, "BEGIN" }, \
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{ TRACE_NILFS2_TRANSACTION_COMMIT, "COMMIT" }, \
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{ TRACE_NILFS2_TRANSACTION_ABORT, "ABORT" }, \
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{ TRACE_NILFS2_TRANSACTION_TRYLOCK, "TRYLOCK" }, \
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{ TRACE_NILFS2_TRANSACTION_LOCK, "LOCK" }, \
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{ TRACE_NILFS2_TRANSACTION_UNLOCK, "UNLOCK" })
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TRACE_EVENT(nilfs2_transaction_transition,
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TP_PROTO(struct super_block *sb,
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struct nilfs_transaction_info *ti,
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int count,
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unsigned int flags,
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enum nilfs2_transaction_transition_state state),
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TP_ARGS(sb, ti, count, flags, state),
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TP_STRUCT__entry(
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__field(void *, sb)
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__field(void *, ti)
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__field(int, count)
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__field(unsigned int, flags)
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__field(int, state)
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),
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TP_fast_assign(
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__entry->sb = sb;
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__entry->ti = ti;
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__entry->count = count;
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__entry->flags = flags;
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__entry->state = state;
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),
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TP_printk("sb = %p ti = %p count = %d flags = %x state = %s",
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__entry->sb,
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__entry->ti,
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__entry->count,
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__entry->flags,
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show_transaction_state(__entry->state))
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);
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#endif /* _TRACE_NILFS2_H */
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/* This part must be outside protection */
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE nilfs2
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#include <trace/define_trace.h>
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