test/runner: allow disabling VCD using SIM_NO_VCD=1 env var

diff --git a/src/openpower/test/runner.py b/src/openpower/test/runner.py
index 6c6163b0a0613dd20aeedb5dd00312a3bfb84508..ea6edb6f114ee7e9d1246095af4458701736ee43 100644 (file)
--- a/src/openpower/test/runner.py
+++ b/src/openpower/test/runner.py
@@ -19,6 +19,7 @@ from unittest.mock import Mock
 from nmigen import Module, ClockSignal
 from copy import copy, deepcopy
 from pprint import pformat
 from nmigen import Module, ClockSignal
 from copy import copy, deepcopy
 from pprint import pformat

+import os

 
 # NOTE: to use cxxsim, export NMIGEN_SIM_MODE=cxxsim from the shell
 # Also, check out the cxxsim nmigen branch, and latest yosys from git
 
 # NOTE: to use cxxsim, export NMIGEN_SIM_MODE=cxxsim from the shell
 # Also, check out the cxxsim nmigen branch, and latest yosys from git


@@ -570,5 +571,8 @@ class TestRunnerBase(FHDLTestCase):
             sim.add_sync_process(wrap(wb_get(icache.ibus,
                                              self.default_mem, "ICACHE")))
 
             sim.add_sync_process(wrap(wb_get(icache.ibus,
                                              self.default_mem, "ICACHE")))
 

-        with sim.write_vcd("%s.vcd" % gtkname):
+        if "SIM_NO_VCD" in os.environ:

             sim.run()
             sim.run()

+        else:
+            with sim.write_vcd("%s.vcd" % gtkname):
+                sim.run()