GEM5, NVMain FRFCFS MemCon에 WR,RD buffer hit,miss 추가

NVMain에서 FRFCFS-WQF에는 Write, Read Request에 해당하는 Queue 가 두개로 나뉘어 처음부터 Write, Read row buffer hit, miss를 지원한다.

하지만 FRFCFS에서는 Queue가 하나라서 기본적인 Row buffer hit,miss만 지원한다. 이를 Write에 대한 hit,miss 와 Read에 대한 hit, miss 둘다 출력하게 수정한다.

$ vim ./nvmain/MemControl/FRFCFS/FRFCFS.h

  private:
    NVMTransactionQueue *memQueue;

    /* Cached Configuration Variables*/
    uint64_t queueSize;

    /* Stats */
    uint64_t measuredLatencies, measuredQueueLatencies, measuredTotalLatencies;
    double averageLatency, averageQueueLatency, averageTotalLatency;
    uint64_t mem_reads, mem_writes;
    uint64_t rb_hits;
    uint64_t rb_miss;
    uint64_t starvation_precharges;
    uint64_t write_pauses;

위에 해당하는 부분을 아래와 같이 수정한다.

  private:
    NVMTransactionQueue *memQueue;

    /* Cached Configuration Variables*/
    uint64_t queueSize;

    /* Stats */
    uint64_t measuredLatencies, measuredQueueLatencies, measuredTotalLatencies;
    double averageLatency, averageQueueLatency, averageTotalLatency;
    uint64_t mem_reads, mem_writes;
    uint64_t rb_hits;
    uint64_t rb_miss;
    uint64_t starvation_precharges;
    uint64_t write_pauses;

    uint64_t wr_rb_hits;
    uint64_t wr_rb_miss;
    uint64_t rd_rb_hits;
    uint64_t rd_rb_miss;

 

$ vim ./nvmain/MemControl/FRFCFS/FRFCFS.cpp

FRFCFS::FRFCFS( )
{
    std::cout << "Created a First Ready First Come First Serve memory controller!"
        << std::endl;

    queueSize = 32;
    starvationThreshold = 4;

    averageLatency = 0.0f;
    averageQueueLatency = 0.0f;
    averageTotalLatency = 0.0f;

    measuredLatencies = 0;
    measuredQueueLatencies = 0;
    measuredTotalLatencies = 0;

    mem_reads = 0;
    mem_writes = 0;

    rb_hits = 0;
    rb_miss = 0;

    write_pauses = 0;

    starvation_precharges = 0;

    psInterval = 0;

    InitQueues( 1 );

    memQueue = &(transactionQueues[0]);
}

위에 해당하는 부분을 아래와 같이 수정한다.

FRFCFS::FRFCFS( )
{
    std::cout << "Created a First Ready First Come First Serve memory controller!"
        << std::endl;

    queueSize = 32;
    starvationThreshold = 4;

    averageLatency = 0.0f;
    averageQueueLatency = 0.0f;
    averageTotalLatency = 0.0f;

    measuredLatencies = 0;
    measuredQueueLatencies = 0;
    measuredTotalLatencies = 0;

    mem_reads = 0;
    mem_writes = 0;

    rb_hits = 0;
    rb_miss = 0;
    wr_rb_hits = 0;
    wr_rb_miss = 0;
    rd_rb_hits = 0;
    rd_rb_miss = 0;

    write_pauses = 0;

    starvation_precharges = 0;

    psInterval = 0;

    InitQueues( 1 );

    memQueue = &(transactionQueues[0]);
}

void FRFCFS::Cycle( ncycle_t steps )
{
    NVMainRequest *nextRequest = NULL;

    /* Check for starved requests BEFORE row buffer hits. */
    if( FindStarvedRequest( *memQueue, &nextRequest ) )
    {
        rb_miss++;
        starvation_precharges++;
    }
    /* Check for row buffer hits. */
    else if( FindRowBufferHit( *memQueue, &nextRequest) )
    {
        rb_hits++;
    }
    /* Check if the address is accessible through any other means. */
    else if( FindCachedAddress( *memQueue, &nextRequest ) )
    {
    }
    else if( FindWriteStalledRead( *memQueue, &nextRequest ) )
    {
        if( nextRequest != NULL )
            write_pauses++;
    }
    /* Find the oldest request that can be issued. */
    else if( FindOldestReadyRequest( *memQueue, &nextRequest ) )
    {
        rb_miss++;
    }
    /* Find requests to a bank that is closed. */
    else if( FindClosedBankRequest( *memQueue, &nextRequest ) )
    {
        rb_miss++;
    }
    else
    {
        nextRequest = NULL;
    }

    /* Issue the commands for this transaction. */
    if( nextRequest != NULL )
    {
        IssueMemoryCommands( nextRequest );
    }

    /* Issue any commands in the command queues. */
    CycleCommandQueues( );

    MemoryController::Cycle( steps );
}

위에 해당하는 부분을 아래와 같이 수정한다.

void FRFCFS::Cycle( ncycle_t steps )
{
    NVMainRequest *nextRequest = NULL;

    /* Check for starved requests BEFORE row buffer hits. */
    if( FindStarvedRequest( *memQueue, &nextRequest ) )
    {
        rb_miss++;
        starvation_precharges++;
        
        if(nextRequest->type == WRITE){
            wr_rb_miss++;
        }   
        else if(nextRequest->type == READ){
            rd_rb_miss++;
        }
    }
    /* Check for row buffer hits. */
    else if( FindRowBufferHit( *memQueue, &nextRequest) )
    {
        rb_hits++;

        if(nextRequest->type == WRITE){
            wr_rb_hits++;
        }   
        else if(nextRequest->type == READ){
            rd_rb_hits++;
        }
    }
    /* Check if the address is accessible through any other means. */
    else if( FindCachedAddress( *memQueue, &nextRequest ) )
    {
    }
    else if( FindWriteStalledRead( *memQueue, &nextRequest ) )
    {
        if( nextRequest != NULL )
            write_pauses++;
    }
    /* Find the oldest request that can be issued. */
    else if( FindOldestReadyRequest( *memQueue, &nextRequest ) )
    {
        rb_miss++;
        if(nextRequest->type == WRITE){
            wr_rb_miss++;
        }   
        else if(nextRequest->type == READ){
            rd_rb_miss++;
        }
    }
    /* Find requests to a bank that is closed. */
    else if( FindClosedBankRequest( *memQueue, &nextRequest ) )
    {
        rb_miss++;
        if(nextRequest->type == WRITE){
            wr_rb_miss++;
        }   
        else if(nextRequest->type == READ){
            rd_rb_miss++;
        }
    }
    else
    {
        nextRequest = NULL;
    }

    /* Issue the commands for this transaction. */
    if( nextRequest != NULL )
    {
        IssueMemoryCommands( nextRequest );
    }

    /* Issue any commands in the command queues. */
    CycleCommandQueues( );

    MemoryController::Cycle( steps );
}

void FRFCFS::RegisterStats( )
{
    AddStat(mem_reads);
    AddStat(mem_writes);
    AddStat(rb_hits);
    AddStat(rb_miss);
    AddStat(starvation_precharges);
    AddStat(averageLatency);
    AddStat(averageQueueLatency);
    AddStat(averageTotalLatency);
    AddStat(measuredLatencies);
    AddStat(measuredQueueLatencies);
    AddStat(measuredTotalLatencies);
    AddStat(write_pauses);

    MemoryController::RegisterStats( );
}

위에 해당하는 부분을 아래와 같이 수정한다.

void FRFCFS::RegisterStats( )
{
    AddStat(mem_reads);
    AddStat(mem_writes);
    AddStat(rb_hits);
    AddStat(rb_miss);
    AddStat(wr_rb_hits);
    AddStat(wr_rb_miss);
    AddStat(rd_rb_hits);
    AddStat(rd_rb_miss);
    AddStat(starvation_precharges);
    AddStat(averageLatency);
    AddStat(averageQueueLatency);
    AddStat(averageTotalLatency);
    AddStat(measuredLatencies);
    AddStat(measuredQueueLatencies);
    AddStat(measuredTotalLatencies);
    AddStat(write_pauses);

    MemoryController::RegisterStats( );
}