Add --debug for enabling internal dumps on various actions
A little weak currently, when it's fully integrated everywhere in
fio it'll help find fio problems that I can't trigger.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/ioengines.c b/ioengines.c
index 9aacc33..c0e30c9 100644
--- a/ioengines.c
+++ b/ioengines.c
@@ -56,12 +56,14 @@
void unregister_ioengine(struct ioengine_ops *ops)
{
+ dprint(FD_IO, "ioengine %s unregistered\n", ops->name);
list_del(&ops->list);
INIT_LIST_HEAD(&ops->list);
}
void register_ioengine(struct ioengine_ops *ops)
{
+ dprint(FD_IO, "ioengine %s registered\n", ops->name);
INIT_LIST_HEAD(&ops->list);
list_add_tail(&ops->list, &engine_list);
}
@@ -86,6 +88,8 @@
struct ioengine_ops *ops;
void *dlhandle;
+ dprint(FD_IO, "dload engine %s\n", engine_lib);
+
dlerror();
dlhandle = dlopen(engine_lib, RTLD_LAZY);
if (!dlhandle) {
@@ -113,6 +117,8 @@
struct ioengine_ops *ops, *ret;
char engine[16];
+ dprint(FD_IO, "load ioengine %s\n", name);
+
strncpy(engine, name, sizeof(engine) - 1);
/*
@@ -145,6 +151,8 @@
void close_ioengine(struct thread_data *td)
{
+ dprint(FD_IO, "close ioengine %s\n", td->io_ops->name);
+
if (td->io_ops->cleanup)
td->io_ops->cleanup(td);
@@ -155,8 +163,20 @@
td->io_ops = NULL;
}
+static void dprint_io_u(struct io_u *io_u, const char *p)
+{
+ struct fio_file *f = io_u->file;
+
+ dprint(FD_IO, "%s: off=%llu/len=%lu/ddir=%d", p, io_u->offset,
+ io_u->buflen, io_u->ddir);
+ if (f)
+ dprint(FD_IO, "/%s", f->file_name);
+ dprint(FD_IO, "\n");
+}
+
int td_io_prep(struct thread_data *td, struct io_u *io_u)
{
+ dprint_io_u(io_u, "prep");
fio_ro_check(td, io_u);
if (td->io_ops->prep)
@@ -168,22 +188,27 @@
int td_io_getevents(struct thread_data *td, unsigned int min, unsigned int max,
struct timespec *t)
{
+ int r = 0;
+
if (min > 0 && td->io_ops->commit) {
- int r = td->io_ops->commit(td);
-
+ r = td->io_ops->commit(td);
if (r < 0)
- return r;
+ goto out;
}
- if (td->io_ops->getevents)
- return td->io_ops->getevents(td, min, max, t);
- return 0;
+ r = 0;
+ if (td->io_ops->getevents)
+ r = td->io_ops->getevents(td, min, max, t);
+out:
+ dprint(FD_IO, "getevents: %d\n", r);
+ return r;
}
int td_io_queue(struct thread_data *td, struct io_u *io_u)
{
int ret;
+ dprint_io_u(io_u, "queue");
fio_ro_check(td, io_u);
assert((io_u->flags & IO_U_F_FLIGHT) == 0);
@@ -253,6 +278,8 @@
int td_io_commit(struct thread_data *td)
{
+ dprint(FD_IO, "calling ->commit(), depth %d\n", td->cur_depth);
+
if (!td->cur_depth)
return 0;