public override IORequest SaturatedMode_GetNextRequest()
{
if (ReceivedRequestCount == numberOfRequestsToBeSeen)
{
return(null);
}
ulong lsn = 0;
switch (addressDistributionType)
{
case InputStreamSynthetic.DistributionType.Uniform:
lsn = randomAddressGenerator1.UniformULong(addressDistributionParam1, addressDistributionParam2);
break;
case InputStreamSynthetic.DistributionType.Normal:
double templsn = randomAddressGenerator1.Normal(addressDistributionParam1, addressDistributionParam2);
lsn = (uint)templsn;
if (templsn < 0)
{
lsn = 0;
}
else if (templsn > this.FTL.AddressMapper.LargestLSN)
{
lsn = this.FTL.AddressMapper.LargestLSN;
}
break;
case InputStreamSynthetic.DistributionType.Fixed:
lsn = addressDistributionParam1;
break;
case InputStreamSynthetic.DistributionType.HotCold:
if (randomHotColdRatioGenerator.Uniform(0, 1) < hotTrafficRate)
{
lsn = addressDistributionParam1 + randomHotAddressGenerator.UniformULong(0, hotAddressRange);
}
else
{
lsn = randomAddressGenerator1.UniformULong(0, this.FTL.AddressMapper.LargestLSN - hotAddressRange);
if (lsn > addressDistributionParam1)
{
lsn += hotAddressRange;
}
}
break;
default:
throw new Exception("Unknown distribution type for address.");
}
uint reqSize = 0;
switch (requestSizeDistributionType)
{
case InputStreamSynthetic.DistributionType.Uniform:
double tempReqSize = randomRequestSizeGenerator.Uniform(requestSizeDistributionParam1B, requestSizeDistributionParam2B);
reqSize = (uint)(Math.Ceiling(tempReqSize / (double)FTL.SubPageCapacity));
if (reqSize == 0)
{
reqSize = 1;
}
break;
case InputStreamSynthetic.DistributionType.Normal:
tempReqSize = randomRequestSizeGenerator.Normal(requestSizeDistributionParam1B, requestSizeDistributionParam2B);
reqSize = (uint)(Math.Ceiling(tempReqSize / (double)FTL.SubPageCapacity));
if (tempReqSize < 0)
{
reqSize = 1;
}
break;
case InputStreamSynthetic.DistributionType.Fixed:
reqSize = (uint)(Math.Ceiling(requestSizeDistributionParam1B / (double)FTL.SubPageCapacity));
break;
default:
throw new Exception("Uknown distribution type for requset size.");
}
IORequest request = null;
if (randomRequestTypeGenerator.Uniform(0, 1) < readRatio)
{
request = new IORequest(XEngineFactory.XEngine.Time, lsn, reqSize, IORequestType.Read);
ReceivedReadRequestCount++;
}
else
{
request = new IORequest(XEngineFactory.XEngine.Time, lsn, reqSize, IORequestType.Write);
ReceivedWriteRequestCount++;
}
ReceivedRequestCount++;
if (ReceivedRequestCount == numberOfRequestsToBeSeen)
{
reqExists = false;
}
request.RelatedNodeInList = NCQ.AddLast(request);
return(request);
}
public override void ProcessXEvent(XEvent e)
{
switch ((HostInterfaceEventType)e.Type)
{
case HostInterfaceEventType.GenerateNextIORequest:
IORequest request = null;
IORequestType reqType = IORequestType.Write;
if (randomRequestTypeGenerator.Uniform(0, 1) < readRatio)
{
reqType = IORequestType.Read;
ReceivedReadRequestCount++;
}
else
{
ReceivedWriteRequestCount++;
}
ulong lsn = 0;
switch (addressDistributionType)
{
case InputStreamSynthetic.DistributionType.Uniform:
lsn = randomAddressGenerator1.UniformULong(addressDistributionParam1, addressDistributionParam2);
break;
case InputStreamSynthetic.DistributionType.Normal:
double templsn = randomAddressGenerator1.Normal(addressDistributionParam1, addressDistributionParam2);
lsn = (uint)templsn;
if (templsn < 0)
{
lsn = 0;
}
else if (templsn > this.FTL.AddressMapper.LargestLSN)
{
lsn = this.FTL.AddressMapper.LargestLSN;
}
break;
case InputStreamSynthetic.DistributionType.Fixed:
lsn = addressDistributionParam1;
break;
case InputStreamSynthetic.DistributionType.HotCold:
if (randomHotColdRatioGenerator.Uniform(0, 1) < hotTrafficRate)
{
lsn = addressDistributionParam1 + randomHotAddressGenerator.UniformULong(0, hotAddressRange);
}
else
{
lsn = randomAddressGenerator1.UniformULong(0, this.FTL.AddressMapper.LargestLSN - hotAddressRange);
if (lsn > addressDistributionParam1)
{
lsn += hotAddressRange;
}
}
break;
default:
throw new Exception("Unknown distribution type for address.");
}
uint reqSize = 0;
switch (requestSizeDistributionType)
{
case InputStreamSynthetic.DistributionType.Uniform:
double tempReqSize = randomRequestSizeGenerator.Uniform(requestSizeDistributionParam1B, requestSizeDistributionParam2B);
reqSize = (uint)(Math.Ceiling(tempReqSize / (double)FTL.SubPageCapacity));
if (reqSize == 0)
{
reqSize = 1;
}
break;
case InputStreamSynthetic.DistributionType.Normal:
tempReqSize = randomRequestSizeGenerator.Normal(requestSizeDistributionParam1B, requestSizeDistributionParam2B);
reqSize = (uint)(Math.Ceiling(tempReqSize / (double)FTL.SubPageCapacity));
if (tempReqSize < 0)
{
reqSize = 1;
}
break;
case InputStreamSynthetic.DistributionType.Fixed:
reqSize = (uint)(Math.Ceiling(requestSizeDistributionParam1B / (double)FTL.SubPageCapacity));
break;
default:
throw new Exception("Uknown distribution type for requset size.");
}
request = new IORequest(XEngineFactory.XEngine.Time, lsn, reqSize, reqType);
ReceivedRequestCount++;
if (NCQ.Count < NCQSize)
{
request.RelatedNodeInList = NCQ.AddLast(request);
SegmentIORequestNoCache_Sprinkler(request);
FTL.IOScheduler.Schedule((uint)StreamPriorityClass.Urgent, AddressMappingModule.DefaultStreamID);
//FTL.ServiceIORequest();
}
else
{
HostQueue.AddLast(request);
}
if (ReceivedRequestCount < numberOfRequestsToBeSeen)
{
nextRequetArrivalTime = XEngineFactory.XEngine.Time + (ulong)(randomTimeIntervalGenerator.Exponential(averageRequestInterArrivalTime));
XEngineFactory.XEngine.EventList.InsertXEvent(new XEvent(nextRequetArrivalTime, this, null, 0));
}
break;
case HostInterfaceEventType.RequestCompletedByDRAM:
IORequest targetRequest = e.Parameters as IORequest;
SendEarlyResponseToHost(targetRequest);
break;
default:
throw new Exception("Unhandled XEvent type");
}
}
