Add blockalign/ba option

[fio.git] / init.c

diff --git a/init.c b/init.c
index 4ae3baf0af67b85d88eeaa476f3135011649755c..80d098dd9159a6d926a8c53113946522c10d0084 100644 (file)
--- a/init.c
+++ b/init.c
@@ -273,6 +273,21 @@ static int fixup_options(struct thread_data *td)
 
        o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 
+       /*
+        * For random IO, allow blockalign offset other than min_bs.
+        */
+       if (!o->ba[DDIR_READ] || !td_random(td))
+               o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
+       if (!o->ba[DDIR_WRITE] || !td_random(td))
+               o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
+
+       if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
+           o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
+           !td->o.norandommap) {
+               log_err("fio: Any use of blockalign= turns off randommap\n");
+               td->o.norandommap = 1;
+       }
+
        if (!o->file_size_high)
                o->file_size_high = o->file_size_low;