feat(papi): add async mode, use it in scale calls

+ Introduce two explicit handling modes to save memory in scale test.
+ Connect in async mode for both handling modes (to avoid reconnects).
+ Support both pre- and post-37758 VPP PAPI async behavior.
+ Use control-ping in dumps to emulate sync mode.
+ Do not use it for single reply to avoid VPP-2033.
+ Fix call sites to get their replies with correct handling mode.
+ Drain enqueued replies to avoid subsequent errors.
+ Retry if read returns None too early.
+ Update docstrings.
- Complexity issues reported by pylint postponed, needs larger refactor.
- Explicit replace of VAT is done in subsequent changes.

Ticket: CSIT-1547 CSIT-1671

Change-Id: I3c63fa5c578975cc4dd7fce0babe3ab04ec15ed3
Signed-off-by: Vratko Polak <vrpolak@cisco.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/resources/libraries/python/IPUtil.py b/resources/libraries/python/IPUtil.py
index 4a5a413fc8..359bd1dce9 100644
--- a/resources/libraries/python/IPUtil.py
+++ b/resources/libraries/python/IPUtil.py
@@ -1,5 +1,5 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
-# Copyright (c) 2021 PANTHEON.tech s.r.o.
+# Copyright (c) 2023 Cisco and/or its affiliates.
+# Copyright (c) 2023 PANTHEON.tech s.r.o.
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at:
@@ -796,7 +796,7 @@ class IPUtil:
             ip_network(f"{network}/{prefix_len}", strict=strict),
             format=u"addr"
         )
-        with PapiSocketExecutor(node) as papi_exec:
+        with PapiSocketExecutor(node, is_async=True) as papi_exec:
             for i in range(count):
                 args[u"route"] = IPUtil.compose_vpp_route_structure(
                     node, netiter.inc_fmt(), prefix_len, **kwargs