class MMU: def __init__(self, config, stats): self.stats = stats self._initCacheAtts(config) self._initCacheMapping() self._initCache() self._logCacheConfigs() def _logCacheConfigs(self): self.a = 0 def _initCacheAtts(self, config): self.frameW = config.getFrameW() self.frameH = config.getFrameH() self.blockW = config.getBlockW() self.blockH = config.getBlockH() self.setSize = config.getSetSize() self.numBlocks = config.getNumBlocks() self.rows = config.getRows() self.columns = config.getColumns() self.blocksW = self.frameW / self.blockW self.blocksH = self.frameH / self.blockH self._initBasicMapping() self.logger = LogFile() self.stats.initCacheStats(self.blocksW, self.blocksH, config) def _initBasicMapping(self): self.basicMapping = [] cont = 0 for y in range(0,self.rows): row = [] for x in range(0,self.columns): row.append(cont) cont = cont + 1 self.basicMapping.append(row) def _getCachePosition(self,x,y): normX = x % self.columns normY = y % self.rows return self.basicMapping[normY][normX] def _initCacheMapping(self): self.mapping = [] for y in range(0,self.blocksH): for x in range(0,self.blocksW): self.mapping.append(self._getCachePosition(x,y)) def _initCache(self): self.cache = Cache(self.numBlocks, self.setSize, self.rows, self.columns, self.blockW, self.blockH, self.stats) def performAccess(self, x, y): frameBlock = self._calculateFrameBlock(x, y) cachePosition = self.mapping[frameBlock] #STATS if(self.cache.accessBlock(cachePosition, frameBlock)): self.stats.incHit() self.stats.incHitPerBlock(block) else: self.stats.incMiss() self.stats.incMissPerBlock(block) self.stats.addBlockAccess(1) self.stats.addLineAccess(16) def performAccessBlock(self, access): x = access[0] y = access[1] w = access[2] h = access[3] for line in range(y, y+h): block = [] block.append(self._calculateFrameBlock(x, line)) block.append(self._calculateFrameBlock(x+(w-1), line)) blockSet = set(block) for frameBlock in blockSet: cachePosition = 0 if(frameBlock < len(self.mapping)): cachePosition = self.mapping[frameBlock] #STATS if self.cache.accessBlock(cachePosition, frameBlock): self.stats.incHit(frameBlock) else: self.stats.incMiss(frameBlock) self.stats.addLineAccess(1) self.stats.addBlockAccess(1) def _calculateFrameBlock(self, x, y): blockX = (x / self.blockW) blockY = (y / self.blockH) pos = blockY * self.blocksW + blockX return pos def report(self): self.stats.report() def printCache(self): self.cache.printCache(self.blocksW, self.blocksH)
