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bcachefs: Add a rebalance, data_update tracepoints

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Add a tracepoint for rebalance, printing out
 - the target option
 - the compression option
 - the key being rebalanced

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-11-24 21:52:17 -05:00
parent d05db12715
commit 25d1e39df0
3 changed files with 52 additions and 11 deletions
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14
fs/bcachefs/data_update.c
View file

@ -267,6 +267,20 @@ static int __bch2_data_update_index_update(struct btree_trans *trans,
goto out;
}
if (trace_data_update_enabled()) {
struct printbuf buf = PRINTBUF;
prt_str(&buf, "\nold: ");
bch2_bkey_val_to_text(&buf, c, old);
prt_str(&buf, "\nk: ");
bch2_bkey_val_to_text(&buf, c, k);
prt_str(&buf, "\nnew: ");
bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(insert));
trace_data_update(c, buf.buf);
printbuf_exit(&buf);
}
ret = bch2_insert_snapshot_whiteouts(trans, m->btree_id,
k.k->p, bkey_start_pos(&insert->k)) ?:
bch2_insert_snapshot_whiteouts(trans, m->btree_id,

15
fs/bcachefs/rebalance.c
View file

@ -171,6 +171,21 @@ static struct bkey_s_c next_rebalance_extent(struct btree_trans *trans,
return bkey_s_c_null;
}
if (trace_rebalance_extent_enabled()) {
struct printbuf buf = PRINTBUF;
prt_str(&buf, "target=");
bch2_target_to_text(&buf, c, r->target);
prt_str(&buf, " compression=");
struct bch_compression_opt opt = __bch2_compression_decode(r->compression);
prt_str(&buf, bch2_compression_opts[opt.type]);
prt_str(&buf, " ");
bch2_bkey_val_to_text(&buf, c, k);
trace_rebalance_extent(c, buf.buf);
printbuf_exit(&buf);
}
return k;
}

34
fs/bcachefs/trace.h
View file

@ -32,19 +32,21 @@ DECLARE_EVENT_CLASS(bpos,
TP_printk("%llu:%llu:%u", __entry->p_inode, __entry->p_offset, __entry->p_snapshot)
);
DECLARE_EVENT_CLASS(bkey,
TP_PROTO(struct bch_fs *c, const char *k),
TP_ARGS(c, k),
DECLARE_EVENT_CLASS(str,
TP_PROTO(struct bch_fs *c, const char *str),
TP_ARGS(c, str),
TP_STRUCT__entry(
__string(k, k )
__field(dev_t, dev )
__string(str, str )
),
TP_fast_assign(
__assign_str(k, k);
__entry->dev = c->dev;
__assign_str(str, str);
),
TP_printk("%s", __get_str(k))
TP_printk("%d,%d %s", MAJOR(__entry->dev), MINOR(__entry->dev), __get_str(str))
);
DECLARE_EVENT_CLASS(btree_node,
@ -736,22 +738,22 @@ TRACE_EVENT(bucket_evacuate,
__entry->dev_idx, __entry->bucket)
);
DEFINE_EVENT(bkey, move_extent,
DEFINE_EVENT(str, move_extent,
TP_PROTO(struct bch_fs *c, const char *k),
TP_ARGS(c, k)
);
DEFINE_EVENT(bkey, move_extent_read,
DEFINE_EVENT(str, move_extent_read,
TP_PROTO(struct bch_fs *c, const char *k),
TP_ARGS(c, k)
);
DEFINE_EVENT(bkey, move_extent_write,
DEFINE_EVENT(str, move_extent_write,
TP_PROTO(struct bch_fs *c, const char *k),
TP_ARGS(c, k)
);
DEFINE_EVENT(bkey, move_extent_finish,
DEFINE_EVENT(str, move_extent_finish,
TP_PROTO(struct bch_fs *c, const char *k),
TP_ARGS(c, k)
);
@ -773,7 +775,7 @@ TRACE_EVENT(move_extent_fail,
TP_printk("%d:%d %s", MAJOR(__entry->dev), MINOR(__entry->dev), __get_str(msg))
);
DEFINE_EVENT(bkey, move_extent_start_fail,
DEFINE_EVENT(str, move_extent_start_fail,
TP_PROTO(struct bch_fs *c, const char *str),
TP_ARGS(c, str)
);
@ -1349,6 +1351,16 @@ TRACE_EVENT(write_buffer_flush_slowpath,
TP_printk("%zu/%zu", __entry->nr, __entry->size)
);
DEFINE_EVENT(str, rebalance_extent,
TP_PROTO(struct bch_fs *c, const char *str),
TP_ARGS(c, str)
);
DEFINE_EVENT(str, data_update,
TP_PROTO(struct bch_fs *c, const char *str),
TP_ARGS(c, str)
);
#endif /* _TRACE_BCACHEFS_H */
/* This part must be outside protection */