tests,gpu-compute,mem-ruby: Add GPU Ruby random test

This adds the GPU protocol random tester to the quick/Kokoro tests. The
input has been sized to take around 20 seconds and provides good
coverage for the coherence protocol.

This test can be run with the following:

```
cd tests
./main.py run -j`nproc` gem5/gpu
```

Change-Id: I08d199f0de8cca985f992b7f39b5f82e4218c82d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58270
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>

tests/gem5/gpu/test_gpu_ruby_random.py

@@ -0,0 +1,63 @@
+# Copyright (c) 2022 The Regents of the University of California
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""
+This test will first run the GPU protocol random tester -- it should take about
+30 seconds to run and provides good coverage for the coherence protocol.
+
+Input choices (some are default and thus implicit):
+ - use small cache size to encourage races
+ - use small system size to encourage races since more requests per CU (and
+   faster sim)
+ - use small address range to encourage more races
+ - use small episode length to encourage more races
+ - 50K tests runs in ~30 seconds with reasonably good coverage
+ - num-dmas = 0 because VIPER doesn't support partial cache line writes, which
+   DMAs need
+"""
+
+from testlib import *
+
+gem5_verify_config(
+    name="ruby-gpu-random-test",
+    fixtures=(),
+    verifiers=(),
+    config=joinpath(
+        config.base_dir,
+        "configs",
+        "example",
+        "ruby_gpu_random_test.py",
+    ),
+    config_args=[
+        "--test-length",
+        "50000",
+        "--num-dmas",
+        "0",
+    ],
+    valid_isas=(constants.vega_x86_tag,),
+    valid_hosts=constants.supported_hosts,
+    length=constants.quick_tag,
+)