Random IO fixes

[fio.git] / io_u.c

diff --git a/io_u.c b/io_u.c
index 18e3c3f1c5b9d08d40e4b3b40876b8a36e6a8e4d..a963441a9d3e6baabf4e312146638d90cb46f708 100644 (file)
--- a/io_u.c
+++ b/io_u.c
@@ -118,7 +118,7 @@ static int get_next_rand_offset(struct thread_data *td, struct fio_file *f,
                /*
                 * calculate map offset and chec if it's free
                 */
-               rb = *b + (f->file_offset / td->o.min_bs[ddir]);
+               rb = *b;
                if (random_map_free(td, f, rb))
                        return 0;
 
@@ -162,10 +162,11 @@ static int get_next_offset(struct thread_data *td, struct io_u *io_u)
                if (get_next_rand_offset(td, f, ddir, &b))
                        return 1;
        } else {
-               if (f->last_pos >= f->real_file_size)
-                       return 1;
-
-               b = f->last_pos / td->o.min_bs[ddir];
+               if (f->last_pos >= f->real_file_size) {
+                       if (!td_random(td) || get_next_rand_offset(td, f, ddir, &b))
+                               return 1;
+               } else
+                       b = (f->last_pos - f->file_offset) / td->o.min_bs[ddir];
        }
 
        io_u->offset = (b * td->o.min_bs[ddir]) + f->file_offset;
@@ -185,7 +186,21 @@ static unsigned int get_next_buflen(struct thread_data *td, struct io_u *io_u)
                buflen = td->o.min_bs[ddir];
        else {
                r = os_random_long(&td->bsrange_state);
-               buflen = (unsigned int) (1 + (double) (td->o.max_bs[ddir] - 1) * r / (RAND_MAX + 1.0));
+               if (!td->o.bssplit_nr)
+                       buflen = (unsigned int) (1 + (double) (td->o.max_bs[ddir] - 1) * r / (RAND_MAX + 1.0));
+               else {
+                       long perc = 0;
+                       unsigned int i;
+
+                       for (i = 0; i < td->o.bssplit_nr; i++) {
+                               struct bssplit *bsp = &td->o.bssplit[i];
+
+                               buflen = bsp->bs;
+                               perc += bsp->perc;
+                               if (r <= ((LONG_MAX / 100L) * perc))
+                                       break;
+                       }
+               }
                if (!td->o.bs_unaligned)
                        buflen = (buflen + td->o.min_bs[ddir] - 1) & ~(td->o.min_bs[ddir] - 1);
        }
@@ -312,6 +327,9 @@ void requeue_io_u(struct thread_data *td, struct io_u **io_u)
 
 static int fill_io_u(struct thread_data *td, struct io_u *io_u)
 {
+       if (td->io_ops->flags & FIO_NOIO)
+               goto out;
+
        /*
         * see if it's time to sync
         */
@@ -759,6 +777,7 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
                io_u_mark_latency(td, usec);
 
                if (td_write(td) && idx == DDIR_WRITE &&
+                   td->o.do_verify &&
                    td->o.verify != VERIFY_NONE)
                        log_io_piece(td, io_u);