It is useful to follow individual requests as they are submitted. Add
trace events that show details of each request.
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
block/io_uring.c | 5 +++++
block/trace-events | 3 +++
2 files changed, 8 insertions(+)
diff --git a/block/io_uring.c b/block/io_uring.c
index 22e8d3d9ca..19919da4c9 100644
--- a/block/io_uring.c
+++ b/block/io_uring.c
@@ -128,6 +128,8 @@ static void luring_process_completions(LuringState *s)
LuringAIOCB *luringcb = io_uring_cqe_get_data(cqes);
ret = cqes->res;
+ trace_luring_process_completion(s, luringcb, ret);
+
if (ret == luringcb->qiov->size) {
ret = 0;
} else if (ret >= 0) {
@@ -233,6 +235,7 @@ static int ioq_submit(LuringState *s)
QSIMPLEQ_REMOVE_HEAD(&s->io_q.sq_overflow, next);
}
ret = io_uring_submit(&s->ring);
+ trace_luring_io_uring_submit(s, ret);
/* Prevent infinite loop if submission is refused */
if (ret <= 0) {
if (ret == -EAGAIN) {
@@ -339,6 +342,8 @@ int coroutine_fn luring_co_submit(BlockDriverState *bs,
LuringState *s, int fd,
.is_read = (type == QEMU_AIO_READ),
};
+ trace_luring_co_submit(bs, s, &luringcb, fd, offset, qiov ? qiov->size :
0, type);
+
ret = luring_do_submit(fd, &luringcb, s, offset, type);
if (ret < 0) {
return ret;
diff --git a/block/trace-events b/block/trace-events
index 069779773b..02952fe4cb 100644
--- a/block/trace-events
+++ b/block/trace-events
@@ -67,6 +67,9 @@ luring_io_plug(void *s) "LuringState %p plug"
luring_io_unplug(void *s, int blocked, int plugged, int queued, int inflight)
"LuringState %p blocked %d plugged %d queued %d inflight %d"
luring_do_submit(void *s, int blocked, int plugged, int queued, int inflight)
"LuringState %p blocked %d plugged %d queued %d inflight %d"
luring_do_submit_done(void *s, int ret) "LuringState %p submitted to kernel %d"
+luring_co_submit(void *bs, void *s, void *luringcb, int fd, uint64_t offset,
size_t nbytes, int type) "bs %p s %p luringcb %p fd %d offset %" PRId64 "
nbytes %zd type %d"
+luring_process_completion(void *s, void *aiocb, int ret) "LuringState %p
luringcb %p ret %d"
+luring_io_uring_submit(void *s, int ret) "LuringState %p ret %d"
# qcow2.c
qcow2_writev_start_req(void *co, int64_t offset, int bytes) "co %p offset 0x%"
PRIx64 " bytes %d"
--
2.21.0
