Reuse incoming RDMA buffers

rdma-test
Vitaliy Filippov 2023-02-26 00:55:01 +03:00
parent 8139a34e97
commit 138ffe4032
2 changed files with 13 additions and 14 deletions

View File

@ -410,13 +410,18 @@ bool osd_messenger_t::try_send_rdma(osd_client_t *cl)
return true;
}
static void try_recv_rdma_wr(osd_client_t *cl, ibv_sge *sge, int op_sge)
static void try_recv_rdma_wr(osd_client_t *cl, void *buf)
{
ibv_sge sge = {
.addr = (uintptr_t)buf,
.length = (uint32_t)cl->rdma_conn->max_msg,
.lkey = cl->rdma_conn->ctx->mr->lkey,
};
ibv_recv_wr *bad_wr = NULL;
ibv_recv_wr wr = {
.wr_id = (uint64_t)(cl->peer_fd*2),
.sg_list = sge,
.num_sge = op_sge,
.sg_list = &sge,
.num_sge = 1,
};
int err = ibv_post_recv(cl->rdma_conn->qp, &wr, &bad_wr);
if (err || bad_wr)
@ -434,12 +439,7 @@ bool osd_messenger_t::try_recv_rdma(osd_client_t *cl)
{
void *buf = malloc_or_die(rc->max_msg);
rc->recv_buffers.push_back(buf);
ibv_sge sge = {
.addr = (uintptr_t)buf,
.length = (uint32_t)rc->max_msg,
.lkey = rc->ctx->mr->lkey,
};
try_recv_rdma_wr(cl, &sge, 1);
try_recv_rdma_wr(cl, buf);
}
return true;
}
@ -490,14 +490,13 @@ void osd_messenger_t::handle_rdma_events()
if (!is_send)
{
cl->rdma_conn->cur_recv--;
if (!handle_read_buffer(cl, cl->rdma_conn->recv_buffers[0], wc[i].byte_len))
if (!handle_read_buffer(cl, cl->rdma_conn->recv_buffers[cl->rdma_conn->next_recv_buf], wc[i].byte_len))
{
// handle_read_buffer may stop the client
continue;
}
free(cl->rdma_conn->recv_buffers[0]);
cl->rdma_conn->recv_buffers.erase(cl->rdma_conn->recv_buffers.begin(), cl->rdma_conn->recv_buffers.begin()+1);
try_recv_rdma(cl);
try_recv_rdma_wr(cl, cl->rdma_conn->recv_buffers[cl->rdma_conn->next_recv_buf]);
cl->rdma_conn->next_recv_buf = (cl->rdma_conn->next_recv_buf+1) % cl->rdma_conn->recv_buffers.size();
}
else
{

View File

@ -49,7 +49,7 @@ struct msgr_rdma_connection_t
uint64_t max_msg = 0;
int send_pos = 0, send_buf_pos = 0;
int recv_pos = 0, recv_buf_pos = 0;
int next_recv_buf = 0;
std::vector<void*> recv_buffers;
~msgr_rdma_connection_t();