ruby: more flexible ruby tester support

This patch allows the ruby random tester to use ruby ports that may only
support instr or data requests.  This patch is similar to a previous changeset
(8932:1b2c17565ac8) that was unfortunately broken by subsequent changesets.
This current patch implements the support in a more straight-forward way.
Since retries are now tested when running the ruby random tester, this patch
splits up the retry and drain check behavior so that RubyPort children, such
as the GPUCoalescer, can perform those operations correctly without having to
duplicate code.  Finally, the patch also includes better DPRINTFs for
debugging the tester.

1 files changed, 18 insertions, 5 deletions

diff --git a/src/cpu/testers/rubytest/Check.cc b/src/cpu/testers/rubytest/Check.cc
index 4cdaf9b2f..c8e7816c3 100644
--- a/src/cpu/testers/rubytest/Check.cc
+++ b/src/cpu/testers/rubytest/Check.cc
@@ -94,7 +94,9 @@ Check::initiatePrefetch()
         cmd = MemCmd::ReadReq;
 
         // if necessary, make the request an instruction fetch
-        if (m_tester_ptr->isInstReadableCpuPort(index)) {
+        if (m_tester_ptr->isInstOnlyCpuPort(index) ||
+            (m_tester_ptr->isInstDataCpuPort(index) &&
+             (random_mt.random(0, 0x1)))) {
             flags.set(Request::INST_FETCH);
         }
     } else {
@@ -193,7 +195,7 @@ Check::initiateAction()
     *writeData = m_value + m_store_count;
     pkt->dataDynamic(writeData);
 
-    DPRINTF(RubyTest, "data 0x%x check 0x%x\n",
+    DPRINTF(RubyTest, "Seq write: index %d data 0x%x check 0x%x\n", index,
             *(pkt->getConstPtr<uint8_t>()), *writeData);
 
     // push the subblock onto the sender state.  The sequencer will
@@ -205,6 +207,7 @@ Check::initiateAction()
         DPRINTF(RubyTest, "status before action update: %s\n",
                 (TesterStatus_to_string(m_status)).c_str());
         m_status = TesterStatus_Action_Pending;
+        DPRINTF(RubyTest, "Check %s, State=Action_Pending\n", m_address);
     } else {
         // If the packet did not issue, must delete
         // Note: No need to delete the data, the packet destructor
@@ -232,7 +235,9 @@ Check::initiateCheck()
     Request::Flags flags;
 
     // If necessary, make the request an instruction fetch
-    if (m_tester_ptr->isInstReadableCpuPort(index)) {
+    if (m_tester_ptr->isInstOnlyCpuPort(index) ||
+        (m_tester_ptr->isInstDataCpuPort(index) &&
+         (random_mt.random(0, 0x1)))) {
         flags.set(Request::INST_FETCH);
     }
 
@@ -245,6 +250,8 @@ Check::initiateCheck()
     uint8_t *dataArray = new uint8_t[CHECK_SIZE];
     pkt->dataDynamic(dataArray);
 
+    DPRINTF(RubyTest, "Seq read: index %d\n", index);
+
     // push the subblock onto the sender state.  The sequencer will
     // update the subblock on the return
     pkt->senderState = new SenderState(m_address, req->getSize());
@@ -254,6 +261,7 @@ Check::initiateCheck()
         DPRINTF(RubyTest, "status before check update: %s\n",
                 TesterStatus_to_string(m_status).c_str());
         m_status = TesterStatus_Check_Pending;
+        DPRINTF(RubyTest, "Check %s, State=Check_Pending\n", m_address);
     } else {
         // If the packet did not issue, must delete
         // Note: No need to delete the data, the packet destructor
@@ -291,8 +299,11 @@ Check::performCallback(NodeID proc, SubBlock* data, Cycles curTime)
         m_store_count++;
         if (m_store_count == CHECK_SIZE) {
             m_status = TesterStatus_Ready;
+            DPRINTF(RubyTest, "Check %s, State=Ready\n", m_address);
         } else {
             m_status = TesterStatus_Idle;
+            DPRINTF(RubyTest, "Check %s, State=Idle store_count: %d\n",
+                    m_address, m_store_count);
         }
         DPRINTF(RubyTest, "Action callback return data now %d\n",
                 data->getByte(0));
@@ -316,6 +327,7 @@ Check::performCallback(NodeID proc, SubBlock* data, Cycles curTime)
         m_tester_ptr->incrementCheckCompletions();
 
         m_status = TesterStatus_Idle;
+        DPRINTF(RubyTest, "Check %s, State=Idle\n", m_address);
         pickValue();
 
     } else {
@@ -335,6 +347,7 @@ Check::changeAddress(Addr address)
     assert(m_status == TesterStatus_Idle || m_status == TesterStatus_Ready);
     m_status = TesterStatus_Idle;
     m_address = address;
+    DPRINTF(RubyTest, "Check %s, State=Idle\n", m_address);
     m_store_count = 0;
 }
 
@@ -342,7 +355,6 @@ void
 Check::pickValue()
 {
     assert(m_status == TesterStatus_Idle);
-    m_status = TesterStatus_Idle;
     m_value = random_mt.random(0, 0xff); // One byte
     m_store_count = 0;
 }
@@ -353,7 +365,8 @@ Check::pickInitiatingNode()
     assert(m_status == TesterStatus_Idle || m_status == TesterStatus_Ready);
     m_status = TesterStatus_Idle;
     m_initiatingNode = (random_mt.random(0, m_num_writers - 1));
-    DPRINTF(RubyTest, "picked initiating node %d\n", m_initiatingNode);
+    DPRINTF(RubyTest, "Check %s, State=Idle, picked initiating node %d\n",
+            m_address, m_initiatingNode);
     m_store_count = 0;
 }