tests: extend ruby_mem_test

Replace ruby_mem_test by these tests which run different
configurations:

ruby_mem_test-garnet: use Garnet

ruby_mem_test-simple: use SimpleNetwork (same as original ruby_mem_test)

ruby_mem_test-simple-extra: use SimpleNetwork with
--simple-physical-channels option

ruby_mem_test-simple-extra-multicore: same as previous using 4 cores

JIRA: https://gem5.atlassian.net/browse/GEM5-920

Change-Id: I7716cd222dd56ddbf06f53f92ec9b568ed5a182c
Signed-off-by: Tiago Mück <tiago.muck@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41867
Reviewed-by: Meatboy 106 <garbage2collector@gmail.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

tests/gem5/memory/test.py

@@ -68,17 +68,30 @@ gem5_verify_config(
 )
 
 null_tests = [
-    ('garnet_synth_traffic', ['--sim-cycles', '5000000']),
-    ('memcheck', ['--maxtick', '2000000000', '--prefetchers']),
-    ('ruby_mem_test', ['--abs-max-tick', '20000000',
-        '--functional', '10']),
-    ('ruby_random_test', ['--maxloads', '5000']),
-    ('ruby_direct_test', ['--requests', '50000']),
+    ('garnet_synth_traffic', None, ['--sim-cycles', '5000000']),
+    ('memcheck', None, ['--maxtick', '2000000000', '--prefetchers']),
+    ('ruby_mem_test-garnet', 'ruby_mem_test',
+        ['--abs-max-tick', '20000000', '--functional', '10', \
+         '--network=garnet']),
+    ('ruby_mem_test-simple', 'ruby_mem_test',
+        ['--abs-max-tick', '20000000', '--functional', '10', \
+         '--network=simple']),
+    ('ruby_mem_test-simple-extra', 'ruby_mem_test',
+        ['--abs-max-tick', '20000000', '--functional', '10', \
+         '--network=simple', '--simple-physical-channels']),
+    ('ruby_mem_test-simple-extra-multicore', 'ruby_mem_test',
+        ['--abs-max-tick', '20000000', '--functional', '10', \
+         '--network=simple', '--simple-physical-channels',
+         '--num-cpus=4']),
+    ('ruby_random_test', None, ['--maxloads', '5000']),
+    ('ruby_direct_test', None, ['--requests', '50000']),
 ]
 
-for basename_noext, args in null_tests:
+for test_name, basename_noext, args in null_tests:
+    if basename_noext == None:
+        basename_noext = test_name
     gem5_verify_config(
-        name=basename_noext,
+        name=test_name,
         fixtures=(),
         verifiers=(),
         config=joinpath(config.base_dir, 'configs',