ruby: modify the directed tester to read/write streams

The directed tester supports only generating only read or only write accesses. The
patch modifies the tester to support streams that have both read and write accesses.

configs/example/ruby_direct_test.py

@@ -52,16 +52,17 @@ parser.add_option("-l", "--requests", metavar="N", default=100,
                   help="Stop after N requests")
 parser.add_option("-f", "--wakeup_freq", metavar="N", default=10,
                   help="Wakeup every N cycles")
-parser.add_option("--test-type", type="string", default="SeriesGetx",
-                  help="SeriesGetx|SeriesGets|Invalidate")
+parser.add_option("--test-type", type="choice", default="SeriesGetx",
+                  choices = ["SeriesGetx", "SeriesGets", "SeriesGetMixed",
+                             "Invalidate"],
+                  help = "Type of test")
+parser.add_option("--percent-writes", type="int", default=100,
+                  help="percentage of accesses that should be writes")
 
 #
 # Add the ruby specific and protocol specific options
 #
 Ruby.define_options(parser)
-
-execfile(os.path.join(config_root, "common", "Options.py"))
-
 (options, args) = parser.parse_args()
 
 if args:
@@ -73,10 +74,13 @@ if args:
 #
 if options.test_type == "SeriesGetx":
     generator = SeriesRequestGenerator(num_cpus = options.num_cpus,
-                                             issue_writes = True)
+                                       percent_writes = 100)
 elif options.test_type == "SeriesGets":
     generator = SeriesRequestGenerator(num_cpus = options.num_cpus,
-                                             issue_writes = False)
+                                       percent_writes = 0)
+elif options.test_type == "SeriesGetMixed":
+    generator = SeriesRequestGenerator(num_cpus = options.num_cpus,
+                                       percent_writes = options.percent_writes)
 elif options.test_type == "Invalidate":
     generator = InvalidateGenerator(num_cpus = options.num_cpus)
 else:

src/cpu/testers/directedtest/RubyDirectedTester.py

@@ -42,7 +42,9 @@ class SeriesRequestGenerator(DirectedGenerator):
     type = 'SeriesRequestGenerator'
     cxx_header = "cpu/testers/directedtest/SeriesRequestGenerator.hh"
     addr_increment_size = Param.Int(64, "address increment size")
-    issue_writes = Param.Bool(True, "issue writes if true, otherwise reads")
+    num_series = Param.UInt32(1,
+        "number of different address streams to generate")
+    percent_writes = Param.Percent(50, "percent of access that are writes")
 
 class InvalidateGenerator(DirectedGenerator):
     type = 'InvalidateGenerator'

src/cpu/testers/directedtest/SeriesRequestGenerator.cc

@@ -33,13 +33,13 @@
 #include "debug/DirectedTest.hh"
 
 SeriesRequestGenerator::SeriesRequestGenerator(const Params *p)
-    : DirectedGenerator(p)
+    : DirectedGenerator(p),
+      m_addr_increment_size(p->addr_increment_size),
+      m_percent_writes(p->percent_writes)
 {
     m_status = SeriesRequestGeneratorStatus_Thinking;
     m_active_node = 0;
     m_address = 0x0;
-    m_addr_increment_size = p->addr_increment_size;
-    m_issue_writes = p->issue_writes;
 }
 
 SeriesRequestGenerator::~SeriesRequestGenerator()
@@ -60,11 +60,13 @@ SeriesRequestGenerator::initiate()
     Request *req = new Request(m_address, 1, flags, masterId);
 
     Packet::Command cmd;
-    if (m_issue_writes) {
+    bool do_write = ((random() % 100) < m_percent_writes);
+    if (do_write) {
         cmd = MemCmd::WriteReq;
     } else {
         cmd = MemCmd::ReadReq;
     }
+
     PacketPtr pkt = new Packet(req, cmd);
     uint8_t* dummyData = new uint8_t;
     *dummyData = 0;

src/cpu/testers/directedtest/SeriesRequestGenerator.hh

@@ -56,7 +56,7 @@ class SeriesRequestGenerator : public DirectedGenerator
     Addr m_address;
     uint32_t m_active_node;
     uint32_t m_addr_increment_size;
-    bool m_issue_writes;
+    uint32_t m_percent_writes;
 };
 
 #endif //__CPU_DIRECTEDTEST_SERIESREQUESTGENERATOR_HH__