Performance improvement - only put socket fd's into the appropriate

fdset, not into both sets.

src/iperf_client_api.c

@@ -38,8 +38,10 @@ iperf_create_streams(struct iperf_test *test)
         if ((s = test->protocol->connect(test)) < 0)
             return -1;
 
-        FD_SET(s, &test->read_set);
-        FD_SET(s, &test->write_set);
+	if (test->sender)
+	    FD_SET(s, &test->write_set);
+	else
+	    FD_SET(s, &test->read_set);
 	if (s > test->max_fd) test->max_fd = s;
 
         sp = iperf_new_stream(test, s);

src/iperf_server_api.c

@@ -499,8 +499,10 @@ iperf_run_server(struct iperf_test *test)
                             return -1;
 			}
 
-                        FD_SET(s, &test->read_set);
-                        FD_SET(s, &test->write_set);
+			if (test->sender)
+			    FD_SET(s, &test->write_set);
+			else
+			    FD_SET(s, &test->read_set);
 			if (s > test->max_fd) test->max_fd = s;
 
                         streams_accepted++;