btrfs: Add ftrace for btrfs_workqueue

Add ftrace for btrfs_workqueue for further workqueue tunning.
This patch needs to applied after the workqueue replace patchset.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 3176cdc32937..c346919254a9 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -21,6 +21,7 @@ struct btrfs_block_group_cache;
 struct btrfs_free_cluster;
 struct map_lookup;
 struct extent_buffer;
+struct btrfs_work;
 
 #define show_ref_type(type)                                             \
         __print_symbolic(type,                                          \
@@ -982,6 +983,87 @@ TRACE_EVENT(free_extent_state,
                   (void *)__entry->ip)
 );
 
+DECLARE_EVENT_CLASS(btrfs__work,
+
+        TP_PROTO(struct btrfs_work *work),
+
+        TP_ARGS(work),
+
+        TP_STRUCT__entry(
+                __field(        void *, work                    )
+                __field(        void *, wq                      )
+                __field(        void *, func                    )
+                __field(        void *, ordered_func            )
+                __field(        void *, ordered_free            )
+        ),
+
+        TP_fast_assign(
+                __entry->work           = work;
+                __entry->wq             = work->wq;
+                __entry->func           = work->func;
+                __entry->ordered_func   = work->ordered_func;
+                __entry->ordered_free   = work->ordered_free;
+        ),
+
+        TP_printk("work=%p, wq=%p, func=%p, ordered_func=%p, ordered_free=%p",
+                  __entry->work, __entry->wq, __entry->func,
+                  __entry->ordered_func, __entry->ordered_free)
+);
+
+/* For situiations that the work is freed */
+DECLARE_EVENT_CLASS(btrfs__work__done,
+
+        TP_PROTO(struct btrfs_work *work),
+
+        TP_ARGS(work),
+
+        TP_STRUCT__entry(
+                __field(        void *, work                    )
+        ),
+
+        TP_fast_assign(
+                __entry->work           = work;
+        ),
+
+        TP_printk("work->%p", __entry->work)
+);
+
+DEFINE_EVENT(btrfs__work, btrfs_work_queued,
+
+        TP_PROTO(struct btrfs_work *work),
+
+        TP_ARGS(work)
+);
+
+DEFINE_EVENT(btrfs__work, btrfs_work_sched,
+
+        TP_PROTO(struct btrfs_work *work),
+
+        TP_ARGS(work)
+);
+
+DEFINE_EVENT(btrfs__work, btrfs_normal_work_done,
+
+        TP_PROTO(struct btrfs_work *work),
+
+        TP_ARGS(work)
+);
+
+DEFINE_EVENT(btrfs__work__done, btrfs_all_work_done,
+
+        TP_PROTO(struct btrfs_work *work),
+
+        TP_ARGS(work)
+);
+
+DEFINE_EVENT(btrfs__work, btrfs_ordered_sched,
+
+        TP_PROTO(struct btrfs_work *work),
+
+        TP_ARGS(work)
+);
+
+
 #endif /* _TRACE_BTRFS_H */
 
 /* This part must be outside protection */