bcache: Better alloc tracepoints

Change the invalidate tracepoint to indicate how much data we're invalidating,
and change the alloc tracepoints to indicate what offset they're for.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>

1 files changed, 34 insertions, 14 deletions

diff --git a/include/trace/events/bcache.h b/include/trace/events/bcache.h
index 7110897c3dfa..8fc2a7134d3c 100644
--- a/include/trace/events/bcache.h
+++ b/include/trace/events/bcache.h
@@ -399,26 +399,43 @@ TRACE_EVENT(bcache_keyscan,
 
 /* Allocator */
 
-TRACE_EVENT(bcache_alloc_invalidate,
-	TP_PROTO(struct cache *ca),
-	TP_ARGS(ca),
+TRACE_EVENT(bcache_invalidate,
+	TP_PROTO(struct cache *ca, size_t bucket),
+	TP_ARGS(ca, bucket),
 
 	TP_STRUCT__entry(
-		__field(unsigned,	free			)
-		__field(unsigned,	free_inc		)
-		__field(unsigned,	free_inc_size		)
-		__field(unsigned,	unused			)
+		__field(unsigned,	sectors			)
+		__field(dev_t,		dev			)
+		__field(__u64,		offset			)
 	),
 
 	TP_fast_assign(
-		__entry->free		= fifo_used(&ca->free[RESERVE_NONE]);
-		__entry->free_inc	= fifo_used(&ca->free_inc);
-		__entry->free_inc_size	= ca->free_inc.size;
-		__entry->unused		= fifo_used(&ca->unused);
+		__entry->dev		= ca->bdev->bd_dev;
+		__entry->offset		= bucket << ca->set->bucket_bits;
+		__entry->sectors	= GC_SECTORS_USED(&ca->buckets[bucket]);
 	),
 
-	TP_printk("free %u free_inc %u/%u unused %u", __entry->free,
-		  __entry->free_inc, __entry->free_inc_size, __entry->unused)
+	TP_printk("invalidated %u sectors at %d,%d sector=%llu",
+		  __entry->sectors, MAJOR(__entry->dev),
+		  MINOR(__entry->dev), __entry->offset)
+);
+
+TRACE_EVENT(bcache_alloc,
+	TP_PROTO(struct cache *ca, size_t bucket),
+	TP_ARGS(ca, bucket),
+
+	TP_STRUCT__entry(
+		__field(dev_t,		dev			)
+		__field(__u64,		offset			)
+	),
+
+	TP_fast_assign(
+		__entry->dev		= ca->bdev->bd_dev;
+		__entry->offset		= bucket << ca->set->bucket_bits;
+	),
+
+	TP_printk("allocated %d,%d sector=%llu", MAJOR(__entry->dev),
+		  MINOR(__entry->dev), __entry->offset)
 );
 
 TRACE_EVENT(bcache_alloc_fail,
@@ -426,6 +443,7 @@ TRACE_EVENT(bcache_alloc_fail,
 	TP_ARGS(ca, reserve),
 
 	TP_STRUCT__entry(
+		__field(dev_t,		dev			)
 		__field(unsigned,	free			)
 		__field(unsigned,	free_inc		)
 		__field(unsigned,	unused			)
@@ -433,13 +451,15 @@ TRACE_EVENT(bcache_alloc_fail,
 	),
 
 	TP_fast_assign(
+		__entry->dev		= ca->bdev->bd_dev;
 		__entry->free		= fifo_used(&ca->free[reserve]);
 		__entry->free_inc	= fifo_used(&ca->free_inc);
 		__entry->unused		= fifo_used(&ca->unused);
 		__entry->blocked	= atomic_read(&ca->set->prio_blocked);
 	),
 
-	TP_printk("free %u free_inc %u unused %u blocked %u", __entry->free,
+	TP_printk("alloc fail %d,%d free %u free_inc %u unused %u blocked %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->free,
 		  __entry->free_inc, __entry->unused, __entry->blocked)
 );