Add support for modifying the randomness of a workload

[fio.git] / fio.h

diff --git a/fio.h b/fio.h
index 5438b768da8f781d7f1bd19b4c955de89039b39a..965d7d9c7a4c0804396e91c149a3165381b7bff7 100644 (file)
--- a/fio.h
+++ b/fio.h
@@ -81,6 +81,7 @@ enum {
        FIO_RAND_FILE_SIZE_OFF,
        FIO_RAND_TRIM_OFF,
        FIO_RAND_BUF_OFF,
+       FIO_RAND_SEQ_RAND_OFF,
        FIO_RAND_NR_OFFS,
 };
 
@@ -255,6 +256,14 @@ struct thread_data {
        enum fio_ddir rwmix_ddir;
        unsigned int ddir_seq_nr;
 
+       /*
+        * rand/seq mixed workload state
+        */
+       union {
+               os_random_state_t seq_rand_state;
+               struct frand_state __seq_rand_state;
+       };
+
        /*
         * IO history logs for verification. We use a tree for sorting,
         * if we are overwriting. Otherwise just use a fifo.