Initial support for explicit write barriers

[fio.git] / io_u.c

diff --git a/io_u.c b/io_u.c
index baa961b103cd954a8536a5e1f1a28777526b95ef..6d539a01fbdaec105144c2b93252683a4630af46 100644 (file)
--- a/io_u.c
+++ b/io_u.c
@@ -501,6 +501,17 @@ static enum fio_ddir get_rw_ddir(struct thread_data *td)
        return td->rwmix_ddir;
 }
 
+static void set_rw_ddir(struct thread_data *td, struct io_u *io_u)
+{
+       io_u->ddir = get_rw_ddir(td);
+
+       if (io_u->ddir == DDIR_WRITE && (td->io_ops->flags & FIO_BARRIER) &&
+           td->o.barrier_blocks &&
+          !(td->io_issues[DDIR_WRITE] % td->o.barrier_blocks) &&
+            td->io_issues[DDIR_WRITE])
+               io_u->flags |= IO_U_F_BARRIER;
+}
+
 void put_file_log(struct thread_data *td, struct fio_file *f)
 {
        int ret = put_file(td, f);
@@ -560,7 +571,7 @@ static int fill_io_u(struct thread_data *td, struct io_u *io_u)
        if (td->io_ops->flags & FIO_NOIO)
                goto out;
 
-       io_u->ddir = get_rw_ddir(td);
+       set_rw_ddir(td, io_u);
 
        /*
         * fsync() or fdatasync() or trim etc, we are done
@@ -963,7 +974,7 @@ again:
        if (io_u) {
                assert(io_u->flags & IO_U_F_FREE);
                io_u->flags &= ~(IO_U_F_FREE | IO_U_F_FREE_DEF);
-               io_u->flags &= ~IO_U_F_TRIMMED;
+               io_u->flags &= ~(IO_U_F_TRIMMED | IO_U_F_BARRIER);
 
                io_u->error = 0;
                flist_del(&io_u->list);