0deef376d9
This patch includes software engineering changes and some generic bug fixes
Joel Hestness and Yasuko Eckert made to McPAT 0.8. There are still known
issues/concernts we did not have a chance to address in this patch.
High-level changes in this patch include:
1) Making XML parsing modular and hierarchical:
- Shift parsing responsibility into the components
- Read XML in a (mostly) context-free recursive manner so that McPAT input
files can contain arbitrary component hierarchies
2) Making power, energy, and area calculations a hierarchical and recursive
process
- Components track their subcomponents and recursively call compute
functions in stages
- Make C++ object hierarchy reflect inheritance of classes of components
with similar structures
- Simplify computeArea() and computeEnergy() functions to eliminate
successive calls to calculate separate TDP vs. runtime energy
- Remove Processor component (now unnecessary) and introduce a more abstract
System component
3) Standardizing McPAT output across all components
- Use a single, common data structure for storing and printing McPAT output
- Recursively call print functions through component hierarchy
4) For caches, allow splitting data array and tag array reads and writes for
better accuracy
5) Improving the usability of CACTI by printing more helpful warning and error
messages
6) Minor: Impose more rigorous code style for clarity (more work still to be
done)
Overall, these changes greatly reduce the amount of replicated code, and they
improve McPAT runtime and decrease memory footprint.
271 lines
9.3 KiB
C
271 lines
9.3 KiB
C
/*****************************************************************************
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* McPAT/CACTI
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* SOFTWARE LICENSE AGREEMENT
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* Copyright 2012 Hewlett-Packard Development Company, L.P.
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* Copyright (c) 2010-2013 Advanced Micro Devices, Inc.
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* All Rights Reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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***************************************************************************/
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#ifndef __CONST_H__
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#define __CONST_H__
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#include <math.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* The following are things you might want to change
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* when compiling
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*/
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/*
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* Address bits in a word, and number of output bits from the cache
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*/
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/*
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was: #define ADDRESS_BITS 32
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now: I'm using 42 bits as in the Power4,
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since that's bigger then the 36 bits on the Pentium 4
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and 40 bits on the Opteron
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*/
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const int ADDRESS_BITS = 42;
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/*dt: In addition to the tag bits, the tags also include 1 valid bit, 1 dirty bit, 2 bits for a 4-state
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cache coherency protocoll (MESI), 1 bit for MRU (change this to log(ways) for full LRU).
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So in total we have 1 + 1 + 2 + 1 = 5 */
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const int EXTRA_TAG_BITS = 5;
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/* limits on the various N parameters */
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const unsigned int MAXDATAN = 512; // maximum for Ndwl and Ndbl
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const unsigned int MAXSUBARRAYS = 1048576; // maximum subarrays for data and tag arrays
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const unsigned int MAXDATASPD = 256; // maximum for Nspd
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const unsigned int MAX_COL_MUX = 256;
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#define ROUTER_TYPES 3
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#define WIRE_TYPES 6
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const double Cpolywire = 0;
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/* Threshold voltages (as a proportion of Vdd)
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If you don't know them, set all values to 0.5 */
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#define VTHFA1 0.452
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#define VTHFA2 0.304
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#define VTHFA3 0.420
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#define VTHFA4 0.413
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#define VTHFA5 0.405
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#define VTHFA6 0.452
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#define VSINV 0.452
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#define VTHCOMPINV 0.437
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#define VTHMUXNAND 0.548 // TODO : this constant must be revisited
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#define VTHEVALINV 0.452
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#define VTHSENSEEXTDRV 0.438
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//WmuxdrvNANDn and WmuxdrvNANDp are no longer being used but it's part of the old
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//delay_comparator function which we are using exactly as it used to be, so just setting these to 0
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const double WmuxdrvNANDn = 0;
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const double WmuxdrvNANDp = 0;
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/*===================================================================*/
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/*
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* The following are things you probably wouldn't want to change.
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*/
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#define BIGNUM 1e30
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#define INF 9999999
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#define MIN(a,b) (((a)<(b))?(a):(b))
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/* Used to communicate with the horowitz model */
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#define RISE 1
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#define FALL 0
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#define NCH 1
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#define PCH 0
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#define EPSILON 0.5 //v4.1: This constant is being used in order to fix floating point -> integer
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//conversion problems that were occuring within CACTI. Typical problem that was occuring was
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//that with different compilers a floating point number like 3.0 would get represented as either
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//2.9999....or 3.00000001 and then the integer part of the floating point number (3.0) would
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//be computed differently depending on the compiler. What we are doing now is to replace
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//int (x) with (int) (x+EPSILON) where EPSILON is 0.5. This would fix such problems. Note that
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//this works only when x is an integer >= 0.
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/*
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* Sheng thinks this is more a solution to solve the simple truncate problem
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* (http://www.cs.tut.fi/~jkorpela/round.html) rather than the problem mentioned above.
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* Unfortunately, this solution causes nasty bugs (different results when using O0 and O3).
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* Moreover, round is not correct in CACTI since when an extra fraction of bit/line is needed,
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* we need to provide a complete bit/line even the fraction is just 0.01.
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* So, in later version than 6.5 we use (int)ceil() to get double to int conversion.
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*/
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#define EPSILON2 0.1
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#define EPSILON3 0.6
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#define MINSUBARRAYROWS 16 //For simplicity in modeling, for the row decoding structure, we assume
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//that each row predecode block is composed of at least one 2-4 decoder. When the outputs from the
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//row predecode blocks are combined this means that there are at least 4*4=16 row decode outputs
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#define MAXSUBARRAYROWS 262144 //Each row predecode block produces a max of 2^9 outputs. So
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//the maximum number of row decode outputs will be 2^9*2^9
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#define MINSUBARRAYCOLS 2
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#define MAXSUBARRAYCOLS 262144
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#define INV 0
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#define NOR 1
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#define NAND 2
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#define NUMBER_TECH_FLAVORS 4
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#define NUMBER_INTERCONNECT_PROJECTION_TYPES 2 //aggressive and conservative
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//0 = Aggressive projections, 1 = Conservative projections
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#define NUMBER_WIRE_TYPES 4 //local, semi-global and global
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//1 = 'Semi-global' wire type, 2 = 'Global' wire type
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const int dram_cell_tech_flavor = 3;
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#define VBITSENSEMIN 0.08 //minimum bitline sense voltage is fixed to be 80 mV.
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#define fopt 4.0
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#define INPUT_WIRE_TO_INPUT_GATE_CAP_RATIO 0
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#define BUFFER_SEPARATION_LENGTH_MULTIPLIER 1
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#define NUMBER_MATS_PER_REDUNDANT_MAT 8
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#define NUMBER_STACKED_DIE_LAYERS 1
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// this variable can be set to carry out solution optimization for
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// a maximum area allocation.
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#define STACKED_DIE_LAYER_ALLOTED_AREA_mm2 0 //6.24 //6.21//71.5
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// this variable can also be employed when solution optimization
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// with maximum area allocation is carried out.
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#define MAX_PERCENT_AWAY_FROM_ALLOTED_AREA 50
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// this variable can also be employed when solution optimization
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// with maximum area allocation is carried out.
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#define MIN_AREA_EFFICIENCY 20
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// this variable can be employed when solution with a desired
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// aspect ratio is required.
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#define STACKED_DIE_LAYER_ASPECT_RATIO 1
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// this variable can be employed when solution with a desired
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// aspect ratio is required.
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#define MAX_PERCENT_AWAY_FROM_ASPECT_RATIO 101
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// this variable can be employed to carry out solution optimization
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// for a certain target random cycle time.
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#define TARGET_CYCLE_TIME_ns 1000000000
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#define NUMBER_PIPELINE_STAGES 4
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// this can be used to model the length of interconnect
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// between a bank and a crossbar
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#define LENGTH_INTERCONNECT_FROM_BANK_TO_CROSSBAR 0 //3791 // 2880//micron
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#define IS_CROSSBAR 0
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#define NUMBER_INPUT_PORTS_CROSSBAR 8
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#define NUMBER_OUTPUT_PORTS_CROSSBAR 8
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#define NUMBER_SIGNALS_PER_PORT_CROSSBAR 256
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#define MAT_LEAKAGE_REDUCTION_DUE_TO_SLEEP_TRANSISTORS_FACTOR 1
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#define LEAKAGE_REDUCTION_DUE_TO_LONG_CHANNEL_HP_TRANSISTORS_FACTOR 1
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#define PAGE_MODE 0
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#define MAIN_MEM_PER_CHIP_STANDBY_CURRENT_mA 60
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// We are actually not using this variable in the CACTI code. We just want to acknowledge that
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// this current should be multiplied by the DDR(n) system VDD value to compute the standby power
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// consumed during precharge.
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const double VDD_STORAGE_LOSS_FRACTION_WORST = 0.125;
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const double CU_RESISTIVITY = 0.022; //ohm-micron
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const double BULK_CU_RESISTIVITY = 0.018; //ohm-micron
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const double PERMITTIVITY_FREE_SPACE = 8.854e-18; //F/micron
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const static uint32_t sram_num_cells_wl_stitching_ = 16;
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const static uint32_t dram_num_cells_wl_stitching_ = 64;
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const static uint32_t comm_dram_num_cells_wl_stitching_ = 256;
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const static double num_bits_per_ecc_b_ = 8.0;
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const double bit_to_byte = 8.0;
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#define MAX_NUMBER_GATES_STAGE 20
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#define MAX_NUMBER_HTREE_NODES 20
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#define NAND2_LEAK_STACK_FACTOR 0.2
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#define NAND3_LEAK_STACK_FACTOR 0.2
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#define NOR2_LEAK_STACK_FACTOR 0.2
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#define INV_LEAK_STACK_FACTOR 0.5
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#define MAX_NUMBER_ARRAY_PARTITIONS 1000000
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// abbreviations used in this project
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// ----------------------------------
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//
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// num : number
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// rw : read/write
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// rd : read
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// wr : write
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// se : single-ended
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// sz : size
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// F : feature
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// w : width
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// h : height or horizontal
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// v : vertical or velocity
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enum ram_cell_tech_type_num {
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itrs_hp = 0,
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itrs_lstp = 1,
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itrs_lop = 2,
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lp_dram = 3,
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comm_dram = 4
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};
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const double pppm[4] = {1, 1, 1, 1};
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const double pppm_lkg[4] = {0, 1, 1, 0};
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const double pppm_dyn[4] = {1, 0, 0, 0};
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const double pppm_Isub[4] = {0, 1, 0, 0};
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const double pppm_Ig[4] = {0, 0, 1, 0};
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const double pppm_sc[4] = {0, 0, 0, 1};
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#endif
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