[PATCH] Add 'norandommap' option

[fio.git] / init.c

diff --git a/init.c b/init.c
index 2ab941939501301b2362a79137f243a538935ca7..e4f866a3bc883151372b9b9b3bfd528ee7477775 100644 (file)
--- a/init.c
+++ b/init.c
@@ -51,6 +51,7 @@
 #define DEF_UNLINK             (0)
 #define DEF_WRITE_BW_LOG       (0)
 #define DEF_WRITE_LAT_LOG      (0)
+#define DEF_NO_RAND_MAP                (0)
 
 #define td_var_offset(var)     ((size_t) &((struct thread_data *)0)->var)
 
@@ -342,6 +343,11 @@ static struct fio_option options[] = {
                .type   = FIO_OPT_STR_SET,
                .off1   = td_var_offset(write_lat_log),
        },
+       {
+               .name   = "norandommap",
+               .type   = FIO_OPT_STR_SET,
+               .off1   = td_var_offset(norandommap),
+       },
        {
                .name = NULL,
        },
@@ -479,6 +485,11 @@ static void fixup_options(struct thread_data *td)
                td->max_bs = td->bs;
        if (td_read(td) && !td_rw(td))
                td->verify = 0;
+
+       if (td->norandommap && td->verify != VERIFY_NONE) {
+               log_err("fio: norandommap given, verify disabled\n");
+               td->verify = VERIFY_NONE;
+       }
 }
 
 /*
@@ -674,12 +685,14 @@ int init_random_state(struct thread_data *td)
        if (td->rand_repeatable)
                seeds[3] = DEF_RANDSEED;
 
-       for_each_file(td, f, i) {
-               blocks = (f->file_size + td->min_bs - 1) / td->min_bs;
-               num_maps = blocks / BLOCKS_PER_MAP;
-               f->file_map = malloc(num_maps * sizeof(long));
-               f->num_maps = num_maps;
-               memset(f->file_map, 0, num_maps * sizeof(long));
+       if (!td->norandommap) {
+               for_each_file(td, f, i) {
+                       blocks = (f->file_size + td->min_bs - 1) / td->min_bs;
+                       num_maps = blocks / BLOCKS_PER_MAP;
+                       f->file_map = malloc(num_maps * sizeof(long));
+                       f->num_maps = num_maps;
+                       memset(f->file_map, 0, num_maps * sizeof(long));
+               }
        }
 
        os_random_seed(seeds[3], &td->random_state);
@@ -962,6 +975,7 @@ static int fill_def_thread(void)
        def_thread.unlink = DEF_UNLINK;
        def_thread.write_bw_log = write_bw_log;
        def_thread.write_lat_log = write_lat_log;
+       def_thread.norandommap = DEF_NO_RAND_MAP;
 #ifdef FIO_HAVE_DISK_UTIL
        def_thread.do_disk_util = 1;
 #endif