Add support for modifying the randomness of a workload

[fio.git] / options.c

diff --git a/options.c b/options.c
index 1219803a73a1e9880698aa8ecf387f1426e7bdba..97c5b6f93669170981312e58e62f59d98c7730c9 100644 (file)
--- a/options.c
+++ b/options.c
@@ -376,6 +376,25 @@ static int str_rwmix_write_cb(void *data, unsigned long long *val)
        return 0;
 }
 
+static int str_perc_rand_cb(void *data, unsigned long long *val)
+{
+       struct thread_data *td = data;
+
+       td->o.perc_rand = *val;
+       td->o.perc_seq = 100 - *val;
+       return 0;
+}
+
+static int str_perc_seq_cb(void *data, unsigned long long *val)
+{
+       struct thread_data *td = data;
+
+       td->o.perc_seq = *val;
+       td->o.perc_rand = 100 - *val;
+       return 0;
+}
+
+
 static int str_exitall_cb(void)
 {
        exitall_on_terminate = 1;
@@ -1642,6 +1661,32 @@ struct fio_option fio_options[FIO_MAX_OPTS] = {
                .category = FIO_OPT_C_IO,
                .group  = FIO_OPT_G_RANDOM,
        },
+       {
+               .name   = "percentage_random",
+               .lname  = "Percentage Random",
+               .type   = FIO_OPT_INT,
+               .cb     = str_perc_rand_cb,
+               .maxval = 100,
+               .help   = "Percentage of seq/random mix that should be random",
+               .def    = "100",
+               .interval = 5,
+               .inverse = "percentage_sequential",
+               .category = FIO_OPT_C_IO,
+               .group  = FIO_OPT_G_RANDOM,
+       },
+       {
+               .name   = "percentage_sequential",
+               .lname  = "Percentage Sequential",
+               .type   = FIO_OPT_INT,
+               .cb     = str_perc_seq_cb,
+               .maxval = 100,
+               .help   = "Percentage of seq/random mix that should be sequential",
+               .def    = "0",
+               .interval = 5,
+               .inverse = "percentage_random",
+               .category = FIO_OPT_C_IO,
+               .group  = FIO_OPT_G_RANDOM,
+       },
        {
                .name   = "nrfiles",
                .lname  = "Number of files",