python: Make DOT config generation optional

By default, DOT configs are always generated when pydot is present.
This change allows a user to pass an empty --dot-config='' to disable
generating the DOT configuration. This can be useful to save space, or
to reduce Gem5 startup time when running many small regression tests.

This brings the behavior in-line with providing an empty
--dump_config='' and/or --json_config='' which similarly disables
generation of those output files.

Change-Id: I5bf39fda0409b948a8d14f3afa95db8fc78de6ee
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29232
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

diff --git a/src/python/m5/simulate.py b/src/python/m5/simulate.py
index 3317ae8fdd6c865757821e6e66b069459787fbc6..698dfbc62d908731605ec0a258ed74954856ffb4 100644 (file)
--- a/src/python/m5/simulate.py
+++ b/src/python/m5/simulate.py
@@ -107,8 +107,9 @@ def instantiate(ckpt_dir=None):
         except ImportError:
             pass
 
-    do_dot(root, options.outdir, options.dot_config)
-    do_ruby_dot(root, options.outdir, options.dot_config)
+    if options.dot_config:
+        do_dot(root, options.outdir, options.dot_config)
+        do_ruby_dot(root, options.outdir, options.dot_config)
 
     # Initialize the global statistics
     stats.initSimStats()