110152Satgutier@umich.edu----------------------------------------------------------- 210152Satgutier@umich.edu ____ _ ____ _____ ___ __ ____ 310152Satgutier@umich.edu / ___| / \ / ___|_ _|_ _| / /_ | ___| 410152Satgutier@umich.edu | | / _ \| | | | | | | '_ \ |___ \ 510152Satgutier@umich.edu | |___ / ___ \ |___ | | | | | (_) | ___) | 610152Satgutier@umich.edu \____/_/ \_\____| |_| |___| \___(_)____/ 710152Satgutier@umich.edu 810152Satgutier@umich.edu 910152Satgutier@umich.edu A Tool to Model Caches/Memories 1010152Satgutier@umich.edu----------------------------------------------------------- 1110152Satgutier@umich.edu 1210152Satgutier@umich.eduCACTI is an analytical tool that takes a set of cache/memory para- 1310152Satgutier@umich.edumeters as input and calculates its access time, power, cycle 1410152Satgutier@umich.edutime, and area. 1510152Satgutier@umich.eduCACTI was originally developed by Dr. Jouppi and Dr. Wilton 1610152Satgutier@umich.eduin 1993 and since then it has undergone five major 1710152Satgutier@umich.edurevisions. 1810152Satgutier@umich.edu 1910152Satgutier@umich.eduList of features (version 1-6.5): 2010152Satgutier@umich.edu=============================== 2110152Satgutier@umich.eduThe following is the list of features supported by the tool. 2210152Satgutier@umich.edu 2310152Satgutier@umich.edu* Power, delay, area, and cycle time model for 2410152Satgutier@umich.edu direct mapped caches 2510152Satgutier@umich.edu set-associative caches 2610152Satgutier@umich.edu fully associative caches 2710152Satgutier@umich.edu Embedded DRAM memories 2810152Satgutier@umich.edu Commodity DRAM memories 2910152Satgutier@umich.edu 3010152Satgutier@umich.edu* Support for modeling multi-ported uniform cache access (UCA) 3110152Satgutier@umich.edu and multi-banked, multi-ported non-uniform cache access (NUCA). 3210152Satgutier@umich.edu 3310152Satgutier@umich.edu* Leakage power calculation that also considers the operating 3410152Satgutier@umich.edu temperature of the cache. 3510152Satgutier@umich.edu 3610152Satgutier@umich.edu* Router power model. 3710152Satgutier@umich.edu 3810152Satgutier@umich.edu* Interconnect model with different delay, power, and area 3910152Satgutier@umich.edu properties including low-swing wire model. 4010152Satgutier@umich.edu 4110152Satgutier@umich.edu* An interface to perform trade-off analysis involving power, delay, 4210152Satgutier@umich.edu area, and bandwidth. 4310152Satgutier@umich.edu 4410152Satgutier@umich.edu* All process specific values used by the tool are obtained 4510152Satgutier@umich.edu from ITRS and currently, the tool supports 90nm, 65nm, 45nm, 4610152Satgutier@umich.edu and 32nm technology nodes. 4710152Satgutier@umich.edu 4810152Satgutier@umich.eduVersion 6.5 has a new c++ code base and includes numerous bug fixes. 4910152Satgutier@umich.eduCACTI 5.3 and 6.0 activate an entire row of mats to read/write a single 5010152Satgutier@umich.edublock of data. This technique improves reliability at the cost of 5110152Satgutier@umich.edupower. CACTI 6.5 activates minimum number of mats just enough to retrieve 5210152Satgutier@umich.edua block to minimize power. 5310152Satgutier@umich.edu 5410152Satgutier@umich.eduHow to use the tool? 5510152Satgutier@umich.edu==================== 5610152Satgutier@umich.eduPrior versions of CACTI take input parameters such as cache 5710152Satgutier@umich.edusize and technology node as a set of command line arguments. 5810152Satgutier@umich.eduTo avoid a long list of command line arguments, 5910152Satgutier@umich.eduCACTI 6.5 lets users specify their cache model in a more 6010152Satgutier@umich.edudetailed manner by using a config file (cache.cfg). 6110152Satgutier@umich.edu 6210152Satgutier@umich.edu-> define the cache model using cache.cfg 6310152Satgutier@umich.edu-> run the "cacti" binary <./cacti -infile cache.cfg> 6410152Satgutier@umich.edu 6510152Satgutier@umich.eduCACTI6.5 also provides a command line interface similar to earlier versions 6610152Satgutier@umich.eduof CACTI. The command line interface can be used as 6710152Satgutier@umich.edu 6810152Satgutier@umich.edu./cacti cache_size line_size associativity rw_ports excl_read_ports excl_write_ports 6910152Satgutier@umich.edu single_ended_read_ports search_ports banks tech_node output_width specific_tag tag_width 7010152Satgutier@umich.edu access_mode cache main_mem obj_func_delay obj_func_dynamic_power obj_func_leakage_power 7110152Satgutier@umich.edu obj_func_cycle_time obj_func_area dev_func_delay dev_func_dynamic_power dev_func_leakage_power 7210152Satgutier@umich.edu dev_func_area dev_func_cycle_time ed_ed2_none temp wt data_arr_ram_cell_tech_flavor_in 7310152Satgutier@umich.edu data_arr_peri_global_tech_flavor_in tag_arr_ram_cell_tech_flavor_in tag_arr_peri_global_tech_flavor_in 7410152Satgutier@umich.edu interconnect_projection_type_in wire_inside_mat_type_in wire_outside_mat_type_in 7510152Satgutier@umich.edu REPEATERS_IN_HTREE_SEGMENTS_in VERTICAL_HTREE_WIRES_OVER_THE_ARRAY_in 7610152Satgutier@umich.edu BROADCAST_ADDR_DATAIN_OVER_VERTICAL_HTREES_in PAGE_SIZE_BITS_in BURST_LENGTH_in 7710152Satgutier@umich.edu INTERNAL_PREFETCH_WIDTH_in force_wiretype wiretype force_config ndwl ndbl nspd ndcm 7810152Satgutier@umich.edu ndsam1 ndsam2 ecc 7910152Satgutier@umich.edu 8010152Satgutier@umich.eduFor complete documentation of the tool, please refer CACTI-5.3 and 6.0 8110152Satgutier@umich.edutechnical reports and the following paper, 8210152Satgutier@umich.edu"Optimizing NUCA Organizations and Wiring Alternatives for 8310152Satgutier@umich.eduLarge Caches With CACTI 6.0", that appears in MICRO 2007. 8410152Satgutier@umich.edu 8510152Satgutier@umich.eduWe are still improving the tool and refining the code. If you 8610152Satgutier@umich.eduhave any comments, questions, or suggestions please write to 8710152Satgutier@umich.eduus. 8810152Satgutier@umich.edu 8910152Satgutier@umich.eduNaveen Muralimanohar Jung Ho Ahn Sheng Li 9010152Satgutier@umich.edunaveen.muralimanohar@hp.com gajh@snu.ac.kr sheng.li@hp.com 9110152Satgutier@umich.edu 9210152Satgutier@umich.edu 9310152Satgutier@umich.edu 9410152Satgutier@umich.edu 95