opal/common/ucx: Rename wpool recv_worker to dflt_worker

Signed-off-by: Artem Polyakov <artpol84@gmail.com>

opal/mca/common/ucx/common_ucx_wpool.c

@@ -186,9 +186,9 @@ opal_common_ucx_wpool_init(opal_common_ucx_wpool_t *wpool,
         rc = OPAL_ERROR;
         goto err_worker_create;
     }
-    wpool->recv_worker = winfo->worker;
+    wpool->dflt_worker = winfo->worker;
 
-    status = ucp_worker_get_address(wpool->recv_worker,
+    status = ucp_worker_get_address(wpool->dflt_worker,
                                     &wpool->recv_waddr, &wpool->recv_waddr_len);
     if (status != UCS_OK) {
         MCA_COMMON_UCX_VERBOSE(1, "ucp_worker_get_address failed: %d", status);
@@ -208,8 +208,8 @@ opal_common_ucx_wpool_init(opal_common_ucx_wpool_t *wpool,
 err_wpool_add:
     free(wpool->recv_waddr);
 err_get_addr:
-    if (NULL != wpool->recv_worker) {
-        ucp_worker_destroy(wpool->recv_worker);
+    if (NULL != wpool->dflt_worker) {
+        ucp_worker_destroy(wpool->dflt_worker);
     }
  err_worker_create:
     ucp_cleanup(wpool->ucp_ctx);
@@ -241,7 +241,7 @@ void opal_common_ucx_wpool_finalize(opal_common_ucx_wpool_t *wpool)
 
     /* Release the address here. recv worker will be released
      * below along with other idle workers */
-    ucp_worker_release_address(wpool->recv_worker, wpool->recv_waddr);
+    ucp_worker_release_address(wpool->dflt_worker, wpool->recv_waddr);
 
     /* Go over the list, free idle list items */
     if (!opal_list_is_empty(&wpool->idle_workers)) {

opal/mca/common/ucx/common_ucx_wpool.h

@@ -31,7 +31,7 @@ typedef struct {
 
     /* UCX data */
     ucp_context_h ucp_ctx;
-    ucp_worker_h recv_worker;
+    ucp_worker_h dflt_worker;
     ucp_address_t *recv_waddr;
     size_t recv_waddr_len;
 
@@ -76,7 +76,9 @@ typedef struct {
 /* Worker Pool memory (wpmem) is an object that represents a remotely accessible
  * distributed memory.
  * It has dynamic lifetime (created and destroyed by corresponding functions).
- * It depends on particular Wpool context
+ * It depends on particular Wpool context.
+ * Currently OSC is using one context per MPI Window, though in future it will
+ * be possible to have one context for multiple windows.
  */
 typedef struct {
     /* reference context to which memory region belongs */
@@ -100,7 +102,8 @@ typedef struct {
 /* The structure that wraps UCP worker and holds the state that is required
  * for its use.
  * The structure is allocated along with UCP worker on demand and is being held
- * in the Worker Pool lists (either active or idle)
+ * in the Worker Pool lists (either active or idle).
+ * One wpmem is intended per shared memory segment (i.e. MPI Window).
  */
 typedef struct opal_common_ucx_winfo {
     opal_recursive_mutex_t mutex;