Make the pipeline depth an int instead of a size_t. While

they are supposed to be unsigned, casting them to a signed
value for all atomic operations is as errorprone as handling
them as signed entities.

Signed-off-by: George Bosilca <bosilca@icl.utk.edu>

ompi/mca/pml/ob1/pml_ob1.h

@@ -55,8 +55,8 @@ struct mca_pml_ob1_t {
     int free_list_num;      /* initial size of free list */
     int free_list_max;      /* maximum size of free list */
     int free_list_inc;      /* number of elements to grow free list */
-    size_t send_pipeline_depth;
+    int32_t send_pipeline_depth;
-    size_t recv_pipeline_depth;
+    int32_t recv_pipeline_depth;
     size_t rdma_retries_limit;
     int max_rdma_per_request;
     int max_send_per_range;

ompi/mca/pml/ob1/pml_ob1_component.c

@@ -184,8 +184,8 @@ static int mca_pml_ob1_component_register(void)
     mca_pml_ob1_param_register_int("free_list_max", -1, &mca_pml_ob1.free_list_max);
     mca_pml_ob1_param_register_int("free_list_inc", 64, &mca_pml_ob1.free_list_inc);
     mca_pml_ob1_param_register_int("priority", 20, &mca_pml_ob1.priority);
-    mca_pml_ob1_param_register_sizet("send_pipeline_depth", 3, &mca_pml_ob1.send_pipeline_depth);
+    mca_pml_ob1_param_register_int("send_pipeline_depth", 3, &mca_pml_ob1.send_pipeline_depth);
-    mca_pml_ob1_param_register_sizet("recv_pipeline_depth", 4, &mca_pml_ob1.recv_pipeline_depth);
+    mca_pml_ob1_param_register_int("recv_pipeline_depth", 4, &mca_pml_ob1.recv_pipeline_depth);
 
     /* NTH: we can get into a live-lock situation in the RDMA failure path so disable
        RDMA retries for now. Falling back to send may suck but it is better than

ompi/mca/pml/ob1/pml_ob1_recvreq.c

@@ -190,7 +190,7 @@ static void mca_pml_ob1_put_completion (mca_pml_ob1_rdma_frag_t *frag, int64_t r
     mca_pml_ob1_recv_request_t* recvreq = (mca_pml_ob1_recv_request_t *) frag->rdma_req;
     mca_bml_base_btl_t *bml_btl = frag->rdma_bml;
 
-    OPAL_THREAD_SUB_SIZE_T(&recvreq->req_pipeline_depth, 1);
+    OPAL_THREAD_ADD32(&recvreq->req_pipeline_depth, -1);
 
     MCA_PML_OB1_RDMA_FRAG_RETURN(frag);
 
@@ -198,7 +198,7 @@ static void mca_pml_ob1_put_completion (mca_pml_ob1_rdma_frag_t *frag, int64_t r
         assert ((uint64_t) rdma_size == frag->rdma_length);
 
         /* check completion status */
-        OPAL_THREAD_ADD_SIZE_T(&recvreq->req_bytes_received, (size_t) rdma_size);
+        OPAL_THREAD_ADD_SIZE_T(&recvreq->req_bytes_received, rdma_size);
         if (recv_request_pml_complete_check(recvreq) == false &&
             recvreq->req_rdma_offset < recvreq->req_send_offset) {
             /* schedule additional rdma operations */
@@ -1028,7 +1028,7 @@ int mca_pml_ob1_recv_request_schedule_once( mca_pml_ob1_recv_request_t* recvreq,
         if (OPAL_LIKELY(OMPI_SUCCESS == rc)) {
             /* update request state */
             recvreq->req_rdma_offset += size;
-            OPAL_THREAD_ADD_SIZE_T(&recvreq->req_pipeline_depth, 1);
+            OPAL_THREAD_ADD32(&recvreq->req_pipeline_depth, 1);
             recvreq->req_rdma[rdma_idx].length -= size;
             bytes_remaining -= size;
         } else {

ompi/mca/pml/ob1/pml_ob1_recvreq.h

@@ -42,7 +42,7 @@ struct mca_pml_ob1_recv_request_t {
     mca_pml_base_recv_request_t req_recv;
     opal_ptr_t remote_req_send;
     int32_t  req_lock;
-    size_t  req_pipeline_depth;
+    int32_t  req_pipeline_depth;
     size_t   req_bytes_received;  /**< amount of data transferred into the user buffer */
     size_t   req_bytes_expected; /**< local size of the data as suggested by the user */
     size_t   req_rdma_offset;

ompi/mca/pml/ob1/pml_ob1_sendreq.c

@@ -313,7 +313,7 @@ mca_pml_ob1_frag_completion( mca_btl_base_module_t* btl,
                                                                    des->des_segment_count,
                                                                    sizeof(mca_pml_ob1_frag_hdr_t));
 
-    OPAL_THREAD_SUB_SIZE_T(&sendreq->req_pipeline_depth, 1);
+    OPAL_THREAD_ADD32(&sendreq->req_pipeline_depth, -1);
     OPAL_THREAD_ADD_SIZE_T(&sendreq->req_bytes_delivered, req_bytes_delivered);
 
     if(send_request_pml_complete_check(sendreq) == false) {
@@ -1044,7 +1044,7 @@ cannot_pack:
             range->range_btls[btl_idx].length -= size;
             range->range_send_length -= size;
             range->range_send_offset += size;
-            OPAL_THREAD_ADD_SIZE_T(&sendreq->req_pipeline_depth, 1);
+            OPAL_THREAD_ADD32(&sendreq->req_pipeline_depth, 1);
             if(range->range_send_length == 0) {
                 range = get_next_send_range(sendreq, range);
                 prev_bytes_remaining = 0;
@@ -1060,7 +1060,7 @@ cannot_pack:
             range->range_btls[btl_idx].length -= size;
             range->range_send_length -= size;
             range->range_send_offset += size;
-            OPAL_THREAD_ADD_SIZE_T(&sendreq->req_pipeline_depth, 1);
+            OPAL_THREAD_ADD32(&sendreq->req_pipeline_depth, 1);
             if(range->range_send_length == 0) {
                 range = get_next_send_range(sendreq, range);
                 prev_bytes_remaining = 0;

ompi/mca/pml/ob1/pml_ob1_sendreq.h

@@ -48,7 +48,7 @@ struct mca_pml_ob1_send_request_t {
     int32_t  req_state;
     int32_t  req_lock;
     bool     req_throttle_sends;
-    size_t req_pipeline_depth;
+    int32_t  req_pipeline_depth;
     size_t   req_bytes_delivered;
     uint32_t req_rdma_cnt;
     mca_pml_ob1_send_pending_t req_pending;