Changes to support client-server and standalone stress tool runs

This commit has few changes[1,2] required to support running
stress workloads in server-client mode as well as standalone mode
in parallel. Change [3] is a minor fix for handling stress unload.
1. Rename param which is used to specify custom server-client pairs.
2. Now users can run stress tools which are client-server based as well
as standalone stress tools together. So place existing check under condition
when user chooses only 'client_server' type of stress load.
3. In case of stopping stress app, in some cases have seen delays to stop
stress app, giving couple of seconds sleep after stop_cmd fixes the issue

new param which can be used in testcases to configure stress run mode
is documented in base.cfg.

Signed-off-by: Srikanth Aithal <[email protected]>

shared/cfg/base.cfg

@@ -679,6 +679,10 @@ libvirtd_log_cleanup = "yes"
 #uperf_protocol = "tcp"
 #Client profile to run for uperf tests
 #client_profile_uperf = "shared/deps/uperf/iperf.xml"
+#stress_config can have below possible values:
+# 1> client_server: stress workloads which requires client server setup: eg:uperf
+# 2> standalone: stress workloads which are standalone. eg: stress-ng
+# 3> mix: running both client server workload and standalone stress workload in parallel
 
 # params to enable/disable sosreport for host/remote host
 enable_host_sosreport = "no"

virttest/utils_test/__init__.py

@@ -2151,6 +2151,7 @@ def unload_stress(self):
         """
         def _unload_stress():
             self.sendline(self.stop_cmd)
+            time.sleep(2)
             if not self.app_running():
                 return True
             return False
@@ -2547,7 +2548,8 @@ def __init__(self, params, env):
         self.need_profile = int(params.get("need_profile", False))
         self.server_cmd = params.get("%s_server_cmd" % self.stress_type)
         self.client_cmd = params.get("%s_client_cmd" % self.stress_type)
-        self.custom_pair = params.get("server_clients", "").split()
+        self.custom_pair = params.get("vm_pair", "").split()
+        stress_config = params.get("stress_config", "client_server")
         self.server_vms = []
         self.client_vms = []
         self.stress_vm = {}
@@ -2569,14 +2571,14 @@ def __init__(self, params, env):
                         self.server_vms.append(vm)
                     if vm.name == pair.split("_")[1]:
                         self.client_vms.append(vm)
-        if (len(set(self.server_vms)) + len(set(self.client_vms))) != len(self.vms):
-            raise exceptions.TestError(
-                "Number of server client vms does not match total_vms")
-        elif len(self.server_vms) != len(self.client_vms):
+        if stress_config != "mix":
+            if (len(set(self.server_vms)) + len(set(self.client_vms))) != len(self.vms):
+                raise exceptions.TestError(
+                    "Number of server client vms does not match total_vms")
+        if len(self.server_vms) != len(self.client_vms):
             raise exceptions.TestError(
                 "This test requires server and client vms in 1:1 ratio")
-        else:
-            self.pair_vms = zip(self.server_vms, self.client_vms)
+        self.pair_vms = zip(self.server_vms, self.client_vms)
 
     def prepare_profile(self, fpath, pat_repl):
         """