io_uring: add trace support for CQE overflow
authorDylan Yudaken <dylany@fb.com>
Thu, 21 Apr 2022 09:13:40 +0000 (02:13 -0700)
committerJens Axboe <axboe@kernel.dk>
Mon, 25 Apr 2022 00:18:18 +0000 (18:18 -0600)
Add trace function for overflowing CQ ring.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220421091345.2115755-2-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
include/trace/events/io_uring.h

index cddf5b6fbeb452183d1d9ff5d497e31dd9334a9b..42534ec2ab9d06502eb5d9236ce8414be66232f4 100644 (file)
@@ -530,7 +530,7 @@ TRACE_EVENT(io_uring_req_failed,
        ),
 
        TP_printk("ring %p, req %p, user_data 0x%llx, "
-               "op %d, flags 0x%x, prio=%d, off=%llu, addr=%llu, "
+                 "op %d, flags 0x%x, prio=%d, off=%llu, addr=%llu, "
                  "len=%u, rw_flags=0x%x, buf_index=%d, "
                  "personality=%d, file_index=%d, pad=0x%llx/%llx, error=%d",
                  __entry->ctx, __entry->req, __entry->user_data,
@@ -543,6 +543,46 @@ TRACE_EVENT(io_uring_req_failed,
                  (unsigned long long) __entry->pad2, __entry->error)
 );
 
+
+/*
+ * io_uring_cqe_overflow - a CQE overflowed
+ *
+ * @ctx:               pointer to a ring context structure
+ * @user_data:         user data associated with the request
+ * @res:               CQE result
+ * @cflags:            CQE flags
+ * @ocqe:              pointer to the overflow cqe (if available)
+ *
+ */
+TRACE_EVENT(io_uring_cqe_overflow,
+
+       TP_PROTO(void *ctx, unsigned long long user_data, s32 res, u32 cflags,
+                void *ocqe),
+
+       TP_ARGS(ctx, user_data, res, cflags, ocqe),
+
+       TP_STRUCT__entry (
+               __field(  void *,               ctx             )
+               __field(  unsigned long long,   user_data       )
+               __field(  s32,                  res             )
+               __field(  u32,                  cflags          )
+               __field(  void *,               ocqe            )
+       ),
+
+       TP_fast_assign(
+               __entry->ctx            = ctx;
+               __entry->user_data      = user_data;
+               __entry->res            = res;
+               __entry->cflags         = cflags;
+               __entry->ocqe           = ocqe;
+       ),
+
+       TP_printk("ring %p, user_data 0x%llx, res %d, flags %x, "
+                 "overflow_cqe %p",
+                 __entry->ctx, __entry->user_data, __entry->res,
+                 __entry->cflags, __entry->ocqe)
+);
+
 #endif /* _TRACE_IO_URING_H */
 
 /* This part must be outside protection */