Add a new runner to test end-to-end fast data path

This runner caters testing fast host data path (e.g. SRIOV) plus fast VM data path (VM running pktgen-dpdk).
It is implemented as a new flavor of the existing Iteration runner.
(1) Add a new SLA action rate-control
(2) While the SLA target is not met, reduce packet rate until packet loss target is met.

Change-Id: I633f391f1790f03ff31458458d79d3f272475ab5
JIRA: YARDSTICK-615
Signed-off-by: Jing Zhang <jing.c.zhang@nokia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/yardstick/benchmark/runners/iteration.py b/yardstick/benchmark/runners/iteration.py
index c2376af48..29daa0d42 100644
--- a/yardstick/benchmark/runners/iteration.py
+++ b/yardstick/benchmark/runners/iteration.py
@@ -41,6 +41,10 @@ def _worker_process(queue, cls, method_name, scenario_cfg,
     interval = runner_cfg.get("interval", 1)
     iterations = runner_cfg.get("iterations", 1)
     run_step = runner_cfg.get("run_step", "setup,run,teardown")
+    delta = runner_cfg.get("delta", 2)
+    options_cfg = scenario_cfg['options']
+    initial_rate = options_cfg.get("rate", 100)
+    scenario_cfg['options']['rate'] = initial_rate
     LOG.info("worker START, iterations %d times, class %s", iterations, cls)
 
     runner_cfg['runner_id'] = os.getpid()
@@ -77,6 +81,10 @@ def _worker_process(queue, cls, method_name, scenario_cfg,
                 elif sla_action == "monitor":
                     LOG.warning("SLA validation failed: %s", assertion.args)
                     errors = assertion.args
+                elif sla_action == "rate-control":
+                    scenario_cfg['options']['rate'] -= delta
+                    sequence = 1
+                    continue
             except Exception as e:
                 errors = traceback.format_exc()
                 LOG.exception(e)