#include "../fio.h"
#include "../optgroup.h"
+#include "../lib/rand.h"
/*
* Sync engine uses engine_data to store last offset
unsigned long long last_offset;
struct fio_file *last_file;
enum fio_ddir last_ddir;
+
+ struct frand_state rand_state;
};
#ifdef FIO_HAVE_PWRITEV2
struct psyncv2_options {
void *pad;
unsigned int hipri;
+ unsigned int hipri_percentage;
};
static struct fio_option options[] = {
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_INVALID,
},
+ {
+ .name = "hipri_percentage",
+ .lname = "RWF_HIPRI_PERCENTAGE",
+ .type = FIO_OPT_INT,
+ .off1 = offsetof(struct psyncv2_options, hipri_percentage),
+ .minval = 0,
+ .maxval = 100,
+ .def = "100",
+ .help = "Probabilistically set RWF_HIPRI for pwritev2/preadv2",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_INVALID,
+ },
{
.name = NULL,
},
fio_ro_check(td, io_u);
- if (o->hipri)
+ if (o->hipri &&
+ (rand32_between(&sd->rand_state, 1, 100) <= o->hipri_percentage))
flags |= RWF_HIPRI;
iov->iov_base = io_u->xfer_buf;
sd->last_offset = -1ULL;
sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
+ init_rand(&sd->rand_state, 0);
td->io_ops_data = sd;
return 0;