windowsaio: obey sequential/random I/O hinting

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>

diff --git a/engines/windowsaio.c b/engines/windowsaio.c
index c4c5abd45ac4c210c4048f15d8611bec4ab325ac..314eaadf480c485a00f4753b2cd53206b5964211 100644 (file)
--- a/engines/windowsaio.c
+++ b/engines/windowsaio.c
@@ -169,13 +169,26 @@ static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f)
 
        /*
         * Inform Windows whether we're going to be doing sequential or
 
        /*
         * Inform Windows whether we're going to be doing sequential or

-        * random io so it can tune the Cache Manager
+        * random IO so it can tune the Cache Manager

         */
         */

-       if (td->o.td_ddir == TD_DDIR_READ  ||
-               td->o.td_ddir == TD_DDIR_WRITE)
-               flags |= FILE_FLAG_SEQUENTIAL_SCAN;
-       else
+       switch (td->o.fadvise_hint) {
+       case F_ADV_TYPE:
+               if (td_random(td))
+                       flags |= FILE_FLAG_RANDOM_ACCESS;
+               else
+                       flags |= FILE_FLAG_SEQUENTIAL_SCAN;
+               break;
+       case F_ADV_RANDOM:

                flags |= FILE_FLAG_RANDOM_ACCESS;
                flags |= FILE_FLAG_RANDOM_ACCESS;

+               break;
+       case F_ADV_SEQUENTIAL:
+               flags |= FILE_FLAG_SEQUENTIAL_SCAN;
+               break;
+       case F_ADV_NONE:
+               break;
+       default:
+               log_err("fio: unknown fadvise type %d\n", td->o.fadvise_hint);
+       }

 
        if (!td_write(td) || read_only)
                access = GENERIC_READ;
 
        if (!td_write(td) || read_only)
                access = GENERIC_READ;