tests,mem-ruby: Enhance ruby false sharing test with Atomics

New ruby mem test includes a percentages of AMOs that will be executed randomly in ruby mem test

Change-Id: Ie95ed78e59ea773ce6b59060eaece3701fe4478c

configs/example/ruby_mem_test.py

@@ -62,6 +62,12 @@ parser.add_argument(
     default=0,
     help="percentage of accesses that should be functional",
 )
+parser.add_argument(
+    "--atomic",
+    type=int,
+    default=30,
+    help="percentage of accesses that should be atomic",
+)
 parser.add_argument(
     "--suppress-func-errors",
     action="store_true",
@@ -105,6 +111,7 @@ cpus = [
         max_loads=args.maxloads,
         percent_functional=args.functional,
         percent_uncacheable=0,
+        percent_atomic=args.atomic,
         progress_interval=args.progress,
         suppress_func_errors=args.suppress_func_errors,
     )
@@ -133,7 +140,7 @@ else:
     dmas = []
 
 dma_ports = []
-for (i, dma) in enumerate(dmas):
+for i, dma in enumerate(dmas):
     dma_ports.append(dma.test)
 Ruby.create_system(args, False, system, dma_ports=dma_ports)
 
@@ -155,7 +162,7 @@ system.ruby.randomization = True
 
 assert len(cpus) == len(system.ruby._cpu_ports)
 
-for (i, cpu) in enumerate(cpus):
+for i, cpu in enumerate(cpus):
     #
     # Tie the cpu memtester ports to the correct system ports
     #