![direct mapped cache tag index offset direct mapped cache tag index offset](https://i.stack.imgur.com/dcHDW.jpg)
write( 'cache miss! given data has now been stored in cache and memory: ' + str( tag) + ' ' + str( ind) + ' ' + str( block_offset) + ' ' + str( byte_offset) + ' ' + str( mem)) #data has been stored in cache and memoryĬache_data = mem write( 'cache miss! required data read from memory: ' + str( tag) + ' ' + str( ind) + ' ' + str( block_offset) + ' ' + str( byte_offset) + ' ' + str( mem)) #data read from memory write( 'cache hit! given data already in cache: ' + str( tag) + ' ' + str( ind) + ' ' + str( block_offset) + ' ' + str( byte_offset) + ' ' + str( cache_data)) #data in cache and memory PER WAY (which is why we divide the value of line from Direct Mapped by the number of ways). write( 'cache hit! required data read from cache: ' + str( tag) + ' ' + str( ind) + ' ' + str( block_offset) + ' ' + str( byte_offset) + ' ' + str( cache_data)) #data read from cache Hexa = '0x' + hexaįor k in range( int( math. Our first question is on for a 32KB direct mapped cache with 64 byte cache clock give the. With sectoring a cache block can have multiple valid bits, in which case the tag might match but the valid bit for the section corresponding to the offset might be cleared (indicating that the section is invalid). By 'select the data' I mean that in a cache block there will obviously be more than one memory locations, the offset is used to select between them. If the cache blocks are not sectored, then if the tag field matches any offset within the block will be a hit. log2( 2))):īlock_offset = int( a + getoffset( hexa, lines, w), 2)īyte_offset = int( '0b000000000000000000000000000000' + getoffset( hexa, lines, w), 2)Ĭache_data = value The tag is used to find the block inside the cache, the index only shows the set in which the block is situated (making it quite redundant) and the offset is used to select the data. 32 128 don’t have to multiply out) Number of blocks Block size Direct-mapped 4-way associative (5 pts) Exercise 7-22 1. write( 'FILE: ' + file_name + ' words per line: ' + str( w) + ' \n \n')Ĭache_data = create_cache_data( w, lines)įor i in range( 32 - int( math. Suppose a cache divides addresses as follows: Fill in the values for a direct-mapped or 4-way associative cache: tag index byte offset 4 bits 3 bits Tag size ( bits) Total size of cache (e.g.
![direct mapped cache tag index offset direct mapped cache tag index offset](https://image3.slideserve.com/6552767/direct-mapped-cache-example-l.jpg)
If( len( trace_files) = 0): #if list of trace files not defined, uses all trace files in current directoryįor file_name in trace_files: #iterates through each trace file in list of trace files Can either use all trace files or define your own. Trace_files = #list of trace files to use.