src/cpu/testers/rubytest/Check.cc - amd/gem5 - Git at Google

 /*
  * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
  * Copyright (c) 2009 Advanced Micro Devices, Inc.
  * 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.
  */

 #include "cpu/testers/rubytest/Check.hh"
 #include "debug/RubyTest.hh"
 #include "mem/ruby/common/SubBlock.hh"
 #include "mem/ruby/system/Sequencer.hh"
 #include "mem/ruby/system/System.hh"

 typedef RubyTester::SenderState SenderState;

 Check::Check(const Address& address, const Address& pc,
              int _num_cpu_sequencers, RubyTester* _tester)
     : m_num_cpu_sequencers(_num_cpu_sequencers), m_tester_ptr(_tester)
 {
     m_status = TesterStatus_Idle;

     pickValue();
     pickInitiatingNode();
     changeAddress(address);
     m_pc = pc;
     m_access_mode = RubyAccessMode(random() % RubyAccessMode_NUM);
     m_store_count = 0;
 }

 void
 Check::initiate()
 {
     DPRINTF(RubyTest, "initiating\n");
     debugPrint();

     // currently no protocols support prefetches
     if (false && (random() & 0xf) == 0) {
         initiatePrefetch(); // Prefetch from random processor
     }

     if (m_tester_ptr->getCheckFlush() && (random() & 0xff) == 0) {
         initiateFlush(); // issue a Flush request from random processor
     }

     if (m_status == TesterStatus_Idle) {
         initiateAction();
     } else if (m_status == TesterStatus_Ready) {
         initiateCheck();
     } else {
         // Pending - do nothing
         DPRINTF(RubyTest,
                 "initiating action/check - failed: action/check is pending\n");
     }
 }

 void
 Check::initiatePrefetch()
 {
     DPRINTF(RubyTest, "initiating prefetch\n");

     int index = random() % m_num_cpu_sequencers;
     RubyTester::CpuPort* port =
         safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

     Request::Flags flags;
     flags.set(Request::PREFETCH);

     Packet::Command cmd;

     // 1 in 8 chance this will be an exclusive prefetch
     if ((random() & 0x7) != 0) {
         cmd = MemCmd::ReadReq;

         // 50% chance that the request will be an instruction fetch
         if ((random() & 0x1) == 0) {
             flags.set(Request::INST_FETCH);
         }
     } else {
         cmd = MemCmd::WriteReq;
         flags.set(Request::PF_EXCLUSIVE);
     }

     // Prefetches are assumed to be 0 sized
     Request *req = new Request(m_address.getAddress(), 0, flags, curTick(),
                                m_pc.getAddress());
     req->setThreadContext(index, 0);

     PacketPtr pkt = new Packet(req, cmd, port->idx);

     // push the subblock onto the sender state.  The sequencer will
     // update the subblock on the return
     pkt->senderState =
         new SenderState(m_address, req->getSize(), pkt->senderState);

     if (port->sendTiming(pkt)) {
         DPRINTF(RubyTest, "successfully initiated prefetch.\n");
     } else {
         // If the packet did not issue, must delete
         SenderState* senderState =  safe_cast<SenderState*>(pkt->senderState);
         pkt->senderState = senderState->saved;
         delete senderState;
         delete pkt->req;
         delete pkt;

         DPRINTF(RubyTest,
                 "prefetch initiation failed because Port was busy.\n");
     }
 }

 void
 Check::initiateFlush()
 {

     DPRINTF(RubyTest, "initiating Flush\n");

     int index = random() % m_num_cpu_sequencers;
     RubyTester::CpuPort* port =
         safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

     Request::Flags flags;

     Request *req = new Request(m_address.getAddress(), CHECK_SIZE, flags, curTick(),
                                m_pc.getAddress());

     Packet::Command cmd;

     cmd = MemCmd::FlushReq;

     PacketPtr pkt = new Packet(req, cmd, port->idx);

     // push the subblock onto the sender state.  The sequencer will
     // update the subblock on the return
     pkt->senderState =
         new SenderState(m_address, req->getSize(), pkt->senderState);

     if (port->sendTiming(pkt)) {
         DPRINTF(RubyTest, "initiating Flush - successful\n");
     }
 }

 void
 Check::initiateAction()
 {
     DPRINTF(RubyTest, "initiating Action\n");
     assert(m_status == TesterStatus_Idle);

     int index = random() % m_num_cpu_sequencers;
     RubyTester::CpuPort* port =
         safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

     Request::Flags flags;

     // Create the particular address for the next byte to be written
     Address writeAddr(m_address.getAddress() + m_store_count);

     // Stores are assumed to be 1 byte-sized
     Request *req = new Request(writeAddr.getAddress(), 1, flags, curTick(),
                                m_pc.getAddress());

     req->setThreadContext(index, 0);
     Packet::Command cmd;

     // 1 out of 8 chance, issue an atomic rather than a write
     // if ((random() & 0x7) == 0) {
     //     cmd = MemCmd::SwapReq;
     // } else {
     cmd = MemCmd::WriteReq;
     // }

     PacketPtr pkt = new Packet(req, cmd, port->idx);
     uint8_t* writeData = new uint8_t;
     *writeData = m_value + m_store_count;
     pkt->dataDynamic(writeData);

     DPRINTF(RubyTest, "data 0x%x check 0x%x\n",
             *(pkt->getPtr<uint8_t>()), *writeData);

     // push the subblock onto the sender state.  The sequencer will
     // update the subblock on the return
     pkt->senderState =
         new SenderState(writeAddr, req->getSize(), pkt->senderState);

     if (port->sendTiming(pkt)) {
         DPRINTF(RubyTest, "initiating action - successful\n");
         DPRINTF(RubyTest, "status before action update: %s\n",
                 (TesterStatus_to_string(m_status)).c_str());
         m_status = TesterStatus_Action_Pending;
     } else {
         // If the packet did not issue, must delete
         // Note: No need to delete the data, the packet destructor
         // will delete it
         SenderState* senderState = safe_cast<SenderState*>(pkt->senderState);
         pkt->senderState = senderState->saved;
         delete senderState;
         delete pkt->req;
         delete pkt;

         DPRINTF(RubyTest, "failed to initiate action - sequencer not ready\n");
     }

     DPRINTF(RubyTest, "status after action update: %s\n",
             (TesterStatus_to_string(m_status)).c_str());
 }

 void
 Check::initiateCheck()
 {
     DPRINTF(RubyTest, "Initiating Check\n");
     assert(m_status == TesterStatus_Ready);

     int index = random() % m_num_cpu_sequencers;
     RubyTester::CpuPort* port =
         safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

     Request::Flags flags;

     // 50% chance that the request will be an instruction fetch
     if ((random() & 0x1) == 0) {
         flags.set(Request::INST_FETCH);
     }

     // Checks are sized depending on the number of bytes written
     Request *req = new Request(m_address.getAddress(), CHECK_SIZE, flags,
                                curTick(), m_pc.getAddress());

     req->setThreadContext(index, 0);
     PacketPtr pkt = new Packet(req, MemCmd::ReadReq, port->idx);
     uint8_t* dataArray = new uint8_t[CHECK_SIZE];
     pkt->dataDynamicArray(dataArray);

     // push the subblock onto the sender state.  The sequencer will
     // update the subblock on the return
     pkt->senderState =
         new SenderState(m_address, req->getSize(), pkt->senderState);

     if (port->sendTiming(pkt)) {
         DPRINTF(RubyTest, "initiating check - successful\n");
         DPRINTF(RubyTest, "status before check update: %s\n",
                 TesterStatus_to_string(m_status).c_str());
         m_status = TesterStatus_Check_Pending;
     } else {
         // If the packet did not issue, must delete
         // Note: No need to delete the data, the packet destructor
         // will delete it
         SenderState* senderState = safe_cast<SenderState*>(pkt->senderState);
         pkt->senderState = senderState->saved;
         delete senderState;
         delete pkt->req;
         delete pkt;

         DPRINTF(RubyTest, "failed to initiate check - cpu port not ready\n");
     }

     DPRINTF(RubyTest, "status after check update: %s\n",
             TesterStatus_to_string(m_status).c_str());
 }

 void
 Check::performCallback(NodeID proc, SubBlock* data)
 {
     Address address = data->getAddress();

     // This isn't exactly right since we now have multi-byte checks
     //  assert(getAddress() == address);

     assert(getAddress().getLineAddress() == address.getLineAddress());
     assert(data != NULL);

     DPRINTF(RubyTest, "RubyTester Callback\n");
     debugPrint();

     if (m_status == TesterStatus_Action_Pending) {
         DPRINTF(RubyTest, "Action callback write value: %d, currently %d\n",
                 (m_value + m_store_count), data->getByte(0));
         // Perform store one byte at a time
         data->setByte(0, (m_value + m_store_count));
         m_store_count++;
         if (m_store_count == CHECK_SIZE) {
             m_status = TesterStatus_Ready;
         } else {
             m_status = TesterStatus_Idle;
         }
         DPRINTF(RubyTest, "Action callback return data now %d\n",
                 data->getByte(0));
     } else if (m_status == TesterStatus_Check_Pending) {
         DPRINTF(RubyTest, "Check callback\n");
         // Perform load/check
         for (int byte_number=0; byte_number<CHECK_SIZE; byte_number++) {
             if (uint8(m_value + byte_number) != data->getByte(byte_number)) {
                 panic("Action/check failure: proc: %d address: %s data: %s "
                       "byte_number: %d m_value+byte_number: %d byte: %d %s"
                       "Time: %d\n",
                       proc, address, data, byte_number,
                       (int)m_value + byte_number,
                       (int)data->getByte(byte_number), *this,
                       g_eventQueue_ptr->getTime());
             }
         }
         DPRINTF(RubyTest, "Action/check success\n");
         debugPrint();

         // successful check complete, increment complete
         m_tester_ptr->incrementCheckCompletions();

         m_status = TesterStatus_Idle;
         pickValue();

     } else {
         panic("Unexpected TesterStatus: %s proc: %d data: %s m_status: %s "
               "time: %d\n",
               *this, proc, data, m_status, g_eventQueue_ptr->getTime());
     }

     DPRINTF(RubyTest, "proc: %d, Address: 0x%x\n", proc,
             getAddress().getLineAddress());
     DPRINTF(RubyTest, "Callback done\n");
     debugPrint();
 }

 void
 Check::changeAddress(const Address& address)
 {
     assert(m_status == TesterStatus_Idle || m_status == TesterStatus_Ready);
     m_status = TesterStatus_Idle;
     m_address = address;
     m_store_count = 0;
 }

 void
 Check::pickValue()
 {
     assert(m_status == TesterStatus_Idle);
     m_status = TesterStatus_Idle;
     m_value = random() & 0xff; // One byte
     m_store_count = 0;
 }

 void
 Check::pickInitiatingNode()
 {
     assert(m_status == TesterStatus_Idle || m_status == TesterStatus_Ready);
     m_status = TesterStatus_Idle;
     m_initiatingNode = (random() % m_num_cpu_sequencers);
     DPRINTF(RubyTest, "picked initiating node %d\n", m_initiatingNode);
     m_store_count = 0;
 }

 void
 Check::print(std::ostream& out) const
 {
     out << "["
         << m_address << ", value: "
         << (int)m_value << ", status: "
         << m_status << ", initiating node: "
         << m_initiatingNode << ", store_count: "
         << m_store_count
         << "]" << std::flush;
 }

 void
 Check::debugPrint()
 {
     DPRINTF(RubyTest,
         "[%#x, value: %d, status: %s, initiating node: %d, store_count: %d]\n",
         m_address.getAddress(), (int)m_value,
         TesterStatus_to_string(m_status).c_str(),
         m_initiatingNode, m_store_count);
 }
	/*
	* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
	* Copyright (c) 2009 Advanced Micro Devices, Inc.
	* 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.
	*/

	#include "cpu/testers/rubytest/Check.hh"
	#include "debug/RubyTest.hh"
	#include "mem/ruby/common/SubBlock.hh"
	#include "mem/ruby/system/Sequencer.hh"
	#include "mem/ruby/system/System.hh"

	typedef RubyTester::SenderState SenderState;

	Check::Check(const Address& address, const Address& pc,
	int _num_cpu_sequencers, RubyTester* _tester)
	: m_num_cpu_sequencers(_num_cpu_sequencers), m_tester_ptr(_tester)
	{
	m_status = TesterStatus_Idle;

	pickValue();
	pickInitiatingNode();
	changeAddress(address);
	m_pc = pc;
	m_access_mode = RubyAccessMode(random() % RubyAccessMode_NUM);
	m_store_count = 0;
	}

	void
	Check::initiate()
	{
	DPRINTF(RubyTest, "initiating\n");
	debugPrint();

	// currently no protocols support prefetches
	if (false && (random() & 0xf) == 0) {
	initiatePrefetch(); // Prefetch from random processor
	}

	if (m_tester_ptr->getCheckFlush() && (random() & 0xff) == 0) {
	initiateFlush(); // issue a Flush request from random processor
	}

	if (m_status == TesterStatus_Idle) {
	initiateAction();
	} else if (m_status == TesterStatus_Ready) {
	initiateCheck();
	} else {
	// Pending - do nothing
	DPRINTF(RubyTest,
	"initiating action/check - failed: action/check is pending\n");
	}
	}

	void
	Check::initiatePrefetch()
	{
	DPRINTF(RubyTest, "initiating prefetch\n");

	int index = random() % m_num_cpu_sequencers;
	RubyTester::CpuPort* port =
	safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

	Request::Flags flags;
	flags.set(Request::PREFETCH);

	Packet::Command cmd;

	// 1 in 8 chance this will be an exclusive prefetch
	if ((random() & 0x7) != 0) {
	cmd = MemCmd::ReadReq;

	// 50% chance that the request will be an instruction fetch
	if ((random() & 0x1) == 0) {
	flags.set(Request::INST_FETCH);
	}
	} else {
	cmd = MemCmd::WriteReq;
	flags.set(Request::PF_EXCLUSIVE);
	}

	// Prefetches are assumed to be 0 sized
	Request *req = new Request(m_address.getAddress(), 0, flags, curTick(),
	m_pc.getAddress());
	req->setThreadContext(index, 0);

	PacketPtr pkt = new Packet(req, cmd, port->idx);

	// push the subblock onto the sender state. The sequencer will
	// update the subblock on the return
	pkt->senderState =
	new SenderState(m_address, req->getSize(), pkt->senderState);

	if (port->sendTiming(pkt)) {
	DPRINTF(RubyTest, "successfully initiated prefetch.\n");
	} else {
	// If the packet did not issue, must delete
	SenderState* senderState = safe_cast<SenderState*>(pkt->senderState);
	pkt->senderState = senderState->saved;
	delete senderState;
	delete pkt->req;
	delete pkt;

	DPRINTF(RubyTest,
	"prefetch initiation failed because Port was busy.\n");
	}
	}

	void
	Check::initiateFlush()
	{

	DPRINTF(RubyTest, "initiating Flush\n");

	int index = random() % m_num_cpu_sequencers;
	RubyTester::CpuPort* port =
	safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

	Request::Flags flags;

	Request *req = new Request(m_address.getAddress(), CHECK_SIZE, flags, curTick(),
	m_pc.getAddress());

	Packet::Command cmd;

	cmd = MemCmd::FlushReq;

	PacketPtr pkt = new Packet(req, cmd, port->idx);

	// push the subblock onto the sender state. The sequencer will
	// update the subblock on the return
	pkt->senderState =
	new SenderState(m_address, req->getSize(), pkt->senderState);

	if (port->sendTiming(pkt)) {
	DPRINTF(RubyTest, "initiating Flush - successful\n");
	}
	}

	void
	Check::initiateAction()
	{
	DPRINTF(RubyTest, "initiating Action\n");
	assert(m_status == TesterStatus_Idle);

	int index = random() % m_num_cpu_sequencers;
	RubyTester::CpuPort* port =
	safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

	Request::Flags flags;

	// Create the particular address for the next byte to be written
	Address writeAddr(m_address.getAddress() + m_store_count);

	// Stores are assumed to be 1 byte-sized
	Request *req = new Request(writeAddr.getAddress(), 1, flags, curTick(),
	m_pc.getAddress());

	req->setThreadContext(index, 0);
	Packet::Command cmd;

	// 1 out of 8 chance, issue an atomic rather than a write
	// if ((random() & 0x7) == 0) {
	// cmd = MemCmd::SwapReq;
	// } else {
	cmd = MemCmd::WriteReq;
	// }

	PacketPtr pkt = new Packet(req, cmd, port->idx);
	uint8_t* writeData = new uint8_t;
	*writeData = m_value + m_store_count;
	pkt->dataDynamic(writeData);

	DPRINTF(RubyTest, "data 0x%x check 0x%x\n",
	(pkt->getPtr<uint8_t>()), writeData);

	// push the subblock onto the sender state. The sequencer will
	// update the subblock on the return
	pkt->senderState =
	new SenderState(writeAddr, req->getSize(), pkt->senderState);

	if (port->sendTiming(pkt)) {
	DPRINTF(RubyTest, "initiating action - successful\n");
	DPRINTF(RubyTest, "status before action update: %s\n",
	(TesterStatus_to_string(m_status)).c_str());
	m_status = TesterStatus_Action_Pending;
	} else {
	// If the packet did not issue, must delete
	// Note: No need to delete the data, the packet destructor
	// will delete it
	SenderState* senderState = safe_cast<SenderState*>(pkt->senderState);
	pkt->senderState = senderState->saved;
	delete senderState;
	delete pkt->req;
	delete pkt;

	DPRINTF(RubyTest, "failed to initiate action - sequencer not ready\n");
	}

	DPRINTF(RubyTest, "status after action update: %s\n",
	(TesterStatus_to_string(m_status)).c_str());
	}

	void
	Check::initiateCheck()
	{
	DPRINTF(RubyTest, "Initiating Check\n");
	assert(m_status == TesterStatus_Ready);

	int index = random() % m_num_cpu_sequencers;
	RubyTester::CpuPort* port =
	safe_cast<RubyTester::CpuPort*>(m_tester_ptr->getCpuPort(index));

	Request::Flags flags;

	// 50% chance that the request will be an instruction fetch
	if ((random() & 0x1) == 0) {
	flags.set(Request::INST_FETCH);
	}

	// Checks are sized depending on the number of bytes written
	Request *req = new Request(m_address.getAddress(), CHECK_SIZE, flags,
	curTick(), m_pc.getAddress());

	req->setThreadContext(index, 0);
	PacketPtr pkt = new Packet(req, MemCmd::ReadReq, port->idx);
	uint8_t* dataArray = new uint8_t[CHECK_SIZE];
	pkt->dataDynamicArray(dataArray);

	// push the subblock onto the sender state. The sequencer will
	// update the subblock on the return
	pkt->senderState =
	new SenderState(m_address, req->getSize(), pkt->senderState);

	if (port->sendTiming(pkt)) {
	DPRINTF(RubyTest, "initiating check - successful\n");
	DPRINTF(RubyTest, "status before check update: %s\n",
	TesterStatus_to_string(m_status).c_str());
	m_status = TesterStatus_Check_Pending;
	} else {
	// If the packet did not issue, must delete
	// Note: No need to delete the data, the packet destructor
	// will delete it
	SenderState* senderState = safe_cast<SenderState*>(pkt->senderState);
	pkt->senderState = senderState->saved;
	delete senderState;
	delete pkt->req;
	delete pkt;

	DPRINTF(RubyTest, "failed to initiate check - cpu port not ready\n");
	}

	DPRINTF(RubyTest, "status after check update: %s\n",
	TesterStatus_to_string(m_status).c_str());
	}

	void
	Check::performCallback(NodeID proc, SubBlock* data)
	{
	Address address = data->getAddress();

	// This isn't exactly right since we now have multi-byte checks
	// assert(getAddress() == address);

	assert(getAddress().getLineAddress() == address.getLineAddress());
	assert(data != NULL);

	DPRINTF(RubyTest, "RubyTester Callback\n");
	debugPrint();

	if (m_status == TesterStatus_Action_Pending) {
	DPRINTF(RubyTest, "Action callback write value: %d, currently %d\n",
	(m_value + m_store_count), data->getByte(0));
	// Perform store one byte at a time
	data->setByte(0, (m_value + m_store_count));
	m_store_count++;
	if (m_store_count == CHECK_SIZE) {
	m_status = TesterStatus_Ready;
	} else {
	m_status = TesterStatus_Idle;
	}
	DPRINTF(RubyTest, "Action callback return data now %d\n",
	data->getByte(0));
	} else if (m_status == TesterStatus_Check_Pending) {
	DPRINTF(RubyTest, "Check callback\n");
	// Perform load/check
	for (int byte_number=0; byte_number<CHECK_SIZE; byte_number++) {
	if (uint8(m_value + byte_number) != data->getByte(byte_number)) {
	panic("Action/check failure: proc: %d address: %s data: %s "
	"byte_number: %d m_value+byte_number: %d byte: %d %s"
	"Time: %d\n",
	proc, address, data, byte_number,
	(int)m_value + byte_number,
	(int)data->getByte(byte_number), *this,
	g_eventQueue_ptr->getTime());
	}
	}
	DPRINTF(RubyTest, "Action/check success\n");
	debugPrint();

	// successful check complete, increment complete
	m_tester_ptr->incrementCheckCompletions();

	m_status = TesterStatus_Idle;
	pickValue();

	} else {
	panic("Unexpected TesterStatus: %s proc: %d data: %s m_status: %s "
	"time: %d\n",
	*this, proc, data, m_status, g_eventQueue_ptr->getTime());
	}

	DPRINTF(RubyTest, "proc: %d, Address: 0x%x\n", proc,
	getAddress().getLineAddress());
	DPRINTF(RubyTest, "Callback done\n");
	debugPrint();
	}

	void
	Check::changeAddress(const Address& address)
	{
	assert(m_status == TesterStatus_Idle \|\| m_status == TesterStatus_Ready);
	m_status = TesterStatus_Idle;
	m_address = address;
	m_store_count = 0;
	}

	void
	Check::pickValue()
	{
	assert(m_status == TesterStatus_Idle);
	m_status = TesterStatus_Idle;
	m_value = random() & 0xff; // One byte
	m_store_count = 0;
	}

	void
	Check::pickInitiatingNode()
	{
	assert(m_status == TesterStatus_Idle \|\| m_status == TesterStatus_Ready);
	m_status = TesterStatus_Idle;
	m_initiatingNode = (random() % m_num_cpu_sequencers);
	DPRINTF(RubyTest, "picked initiating node %d\n", m_initiatingNode);
	m_store_count = 0;
	}

	void
	Check::print(std::ostream& out) const
	{
	out << "["
	<< m_address << ", value: "
	<< (int)m_value << ", status: "
	<< m_status << ", initiating node: "
	<< m_initiatingNode << ", store_count: "
	<< m_store_count
	<< "]" << std::flush;
	}

	void
	Check::debugPrint()
	{
	DPRINTF(RubyTest,
	"[%#x, value: %d, status: %s, initiating node: %d, store_count: %d]\n",
	m_address.getAddress(), (int)m_value,
	TesterStatus_to_string(m_status).c_str(),
	m_initiatingNode, m_store_count);
	}