int main(int argc, char **argv)
{
//cout<<argc<<endl;
//srand((int)time(NULL));
/**
* Configuration
*/
for(int i = 1; i < argc; i++)
{
if(i == 1)
{
if(strcmp(argv[i], "1") == 0)
{
debugMode = true;
} else {
debugMode = false;
}
} else if(i == 2)
{
sscanf(argv[i],"%d",&numberOfTLBEntries);
numberOfTLBEntries = getNearestBiggerPowerOfTwo(numberOfTLBEntries);
} else if(i == 3)
{
sscanf(argv[i],"%d",&numberOfPageFrames);
numberOfPageFrames = getNearestBiggerPowerOfTwo(numberOfPageFrames);
} else if(i == 4)
{
sscanf(argv[i],"%d",&numberOfInstructions);
} else if(i == 5)
{
sscanf(argv[i],"%d",&pageChangeAfterInstructionCount);
}
}
/**
* Initial State
*/
cout<<"Debug Mode: "<<debugMode<<endl;
cout<<"Total number of TLB Entries: "<<numberOfTLBEntries<<endl;
cout<<"Total number of Page Frames: "<<numberOfPageFrames<<endl;
cout<<"Total number of Instructions: "<<numberOfInstructions<<endl;
cout<<"Total number of Virtual Pages: "<<numberOfVirtualPages<<endl;
cout<<"On Average Virtual Address Page Changes after: "<<pageChangeAfterInstructionCount<<endl;
/**
* Operation starts...
* Create a pageTable, a TLB
*/
PageTable pageTable;
TranslationLookaheadBuffer tlb(numberOfTLBEntries);
pageTable.setTranslationLookaheadBuffer(&tlb);
for(int i = 0; i < numberOfInstructions; i++)
{
Instruction nextInstruction = getNextInstruction();
if(debugMode)
{
nextInstruction.print();
}
LookupResult l = tlb.lookup(nextInstruction.msbAddress);
if(l.isFound == true)
{
//do nothing
} else
{
if(debugMode)
{
printf("Cache Miss for page %02x\n",nextInstruction.msbAddress);
}
totalNumberOfCacheMisses += 1;
l = pageTable.lookup(nextInstruction.msbAddress);
if(l.isFound == true)
{
//do nothing
} else
{
if(debugMode)
{
printf("Page fault on page %02x\n",nextInstruction.msbAddress);
}
totalNumberOfPageFaults += 1;
pageTable.insert(nextInstruction.msbAddress);
l = pageTable.lookup(nextInstruction.msbAddress);
}
tlb.insert(nextInstruction.msbAddress, l.frameIndex);
//pageTable.insert(nextInstruction.msbAddress);
//l = pageTable.lookup(nextInstruction.msbAddress);
}
//
if(debugMode)
{
printf("Virtual Address: %02x%02x, Physical Address: %02x%02x\n", nextInstruction.msbAddress, nextInstruction.lsbAddress, l.frameIndex, nextInstruction.lsbAddress);
}
}
cout<<"Total number of Cache Misses: "<<totalNumberOfCacheMisses<<endl;
cout<<"Total number of Page Faults: "<<totalNumberOfPageFaults<<endl;
cout<<"Total number of Page Used: "<<pageTable.getUsedPageCount()<<endl;
cout<<"Total number of Page Changed: "<<pageChangeCount<<endl;
/*TranslationLookaheadBuffer tlb;
unsigned char accessPattern[] = "ABACBDADEDAEBAC";
for(int i = 0; i < 15; i++)
{
cout<<i<<","<<accessPattern[i]<<endl;
LookupResult result = tlb.lookup(accessPattern[i]);
if(result.isFound)
{
tlb.print();
} else {
cout<<"Cache Miss"<<endl;
tlb.insert(accessPattern[i],accessPattern[i]);
tlb.print();
}
}*/
return 0;
}
