rdma: use private random state

We can't reuse td->__random_state as that will impact the sequence
of offsets we generate for random IO.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/engines/rdma.c b/engines/rdma.c
index 26334328cddf3fed500cc155741f7ffaba006f5b..87b061a2e61788563fff7ac05d69e06b1b8e3f29 100644 (file)
--- a/engines/rdma.c
+++ b/engines/rdma.c
@@ -119,6 +119,8 @@ struct rdmaio_data {
        int io_u_flight_nr;
        struct io_u **io_us_completed;
        int io_u_completed_nr;
        int io_u_flight_nr;
        struct io_u **io_us_completed;
        int io_u_completed_nr;

+
+       struct frand_state rand_state;

 };
 
 static int client_recv(struct thread_data *td, struct ibv_wc *wc)
 };
 
 static int client_recv(struct thread_data *td, struct ibv_wc *wc)


@@ -617,7 +619,7 @@ static int fio_rdmaio_send(struct thread_data *td, struct io_u **io_us,
                        if (td->o.use_os_rand)
                                index = os_random_long(&td->random_state) % rd->rmt_nr;
                        else
                        if (td->o.use_os_rand)
                                index = os_random_long(&td->random_state) % rd->rmt_nr;
                        else

-                               index = __rand(&td->__random_state) % rd->rmt_nr;
+                               index = __rand(&rd->rand_state) % rd->rmt_nr;

                        r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_WRITE;
                        r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
                        r_io_u_d->sq_wr.wr.rdma.remote_addr = \
                        r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_WRITE;
                        r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
                        r_io_u_d->sq_wr.wr.rdma.remote_addr = \


@@ -630,7 +632,7 @@ static int fio_rdmaio_send(struct thread_data *td, struct io_u **io_us,
                        if (td->o.use_os_rand)
                                index = os_random_long(&td->random_state) % rd->rmt_nr;
                        else
                        if (td->o.use_os_rand)
                                index = os_random_long(&td->random_state) % rd->rmt_nr;
                        else

-                               index = __rand(&td->__random_state) % rd->rmt_nr;
+                               index = __rand(&rd->rand_state) % rd->rmt_nr;

                        r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_READ;
                        r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
                        r_io_u_d->sq_wr.wr.rdma.remote_addr = \
                        r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_READ;
                        r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
                        r_io_u_d->sq_wr.wr.rdma.remote_addr = \


@@ -1210,6 +1212,7 @@ static int fio_rdmaio_setup(struct thread_data *td)
                rd = malloc(sizeof(*rd));;
 
                memset(rd, 0, sizeof(*rd));
                rd = malloc(sizeof(*rd));;
 
                memset(rd, 0, sizeof(*rd));

+               init_rand_seed(&rd->rand_state, GOLDEN_RATIO_PRIME);

                td->io_ops->data = rd;
        }
 
                td->io_ops->data = rd;
        }