load_gen: Supporting loading of load_gen via loader.

Currently all tools are loaded via loader utility, except load_gen.
Load_gens were loaded directly through component_factory.
This patch adds support to load load_gens through loader utility.

The changes are as follows:
1. Configuration changes:The common.conf include configuration of
   directory. testcases.conf includes changes to load configuration,
   where tool is no more part of the load-configuration. The
   custom.conf has configuration of LOADGEN to be used - this configuration
   replaces the earlier 'tool' configuration parameter.
2. loader_utility_changes:  In loader.py, loadgen_loader is
   defined, which is used in new get_loadgen function.
3. component_factory changes: in create_loadgen, similar
   to other tools, the function just retuns the object of loadgen_class.
4. Renaming of Dummy load_gen: Loader fails to load properly a dummy
   loadgen due to name-clash with dummy in pkt_gen. To avoid this name clash
   dummy is renamed to dummyloadgen.
5. testcase changes: create_loadgen is now called with output of
   loader's get_loadgen_class.
6. Fixed Pylint Errors and extra-space at the end.
7. Included CLI options support for --loadgen and --list-loadgens.
   Thanks to Martin K.
8. Added the missing loadgen parameter in testcases.conf.
9. Fixed the missing comma error.
10. Added CI change in build-vsperf.sh
11. Fixed configuration reading in stress/stress.py

JIRA: VSPERF-533

Change-Id: I3fbb259618825a12fef55320a748a4f02509190b
Signed-off-by: Sridhar K. N. Rao <sridhar.rao@spirent.com>
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/vsperf b/vsperf
index 6efe53da..46b6b416 100755
--- a/vsperf
+++ b/vsperf
@@ -147,6 +147,8 @@ def parse_arguments():
                         help='list all system forwarding applications and exit')
     parser.add_argument('--list-vnfs', action='store_true',
                         help='list all system vnfs and exit')
+    parser.add_argument('--list-loadgens', action='store_true',
+                        help='list all background load generators')
     parser.add_argument('--list-settings', action='store_true',
                         help='list effective settings configuration and exit')
     parser.add_argument('exact_test_name', nargs='*', help='Exact names of\
@@ -174,6 +176,7 @@ def parse_arguments():
     group.add_argument('--vswitch', help='vswitch implementation to use')
     group.add_argument('--fwdapp', help='packet forwarding application to use')
     group.add_argument('--vnf', help='vnf to use')
+    group.add_argument('--loadgen', help='loadgen to use')
     group.add_argument('--sysmetrics', help='system metrics logger to use')
     group = parser.add_argument_group('test behavior options')
     group.add_argument('--xunit', action='store_true',
@@ -439,6 +442,10 @@ def handle_list_options(args):
         print(Loader().get_pktfwds_printable())
         sys.exit(0)
 
+    if args['list_loadgens']:
+        print(Loader().get_loadgens_printable())
+        sys.exit(0)
+
     if args['list_settings']:
         print(str(settings))
         sys.exit(0)
@@ -591,6 +598,14 @@ def main():
                           settings.getValue('VNF_DIR'))
             sys.exit(1)
 
+    if args['loadgen']:
+        loadgens = Loader().get_loadgens()
+        if args['loadgen'] not in loadgens:
+            _LOGGER.error('There are no loadgens matching \'%s\' found in'
+                          ' \'%s\'. Exiting...', args['loadgen'],
+                          settings.getValue('LOADGEN_DIR'))
+            sys.exit(1)
+
     if args['exact_test_name'] and args['tests']:
         _LOGGER.error("Cannot specify tests with both positional args and --test.")
         sys.exit(1)