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gem5/ext/mcpat/cacti/Ucache.cc
Anthony Gutierrez e553a7bfa7 ext: add McPAT source 
this patch adds the source for mcpat, a power, area, and timing modeling
framework.
2014-04-01 12:44:30 -04:00

916 lines
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/*****************************************************************************
* McPAT/CACTI
* SOFTWARE LICENSE AGREEMENT
* Copyright 2012 Hewlett-Packard Development Company, L.P.
* All Rights Reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.”
*
***************************************************************************/
#include <pthread.h>
#include <algorithm>
#include <cmath>
#include <ctime>
#include <iostream>
#include <list>
#include "Ucache.h"
#include "area.h"
#include "bank.h"
#include "basic_circuit.h"
#include "component.h"
#include "const.h"
#include "decoder.h"
#include "parameter.h"
#include "subarray.h"
#include "uca.h"
using namespace std;
const uint32_t nthreads = NTHREADS;
void min_values_t::update_min_values(const min_values_t * val)
{
min_delay = (min_delay > val->min_delay) ? val->min_delay : min_delay;
min_dyn = (min_dyn > val->min_dyn) ? val->min_dyn : min_dyn;
min_leakage = (min_leakage > val->min_leakage) ? val->min_leakage : min_leakage;
min_area = (min_area > val->min_area) ? val->min_area : min_area;
min_cyc = (min_cyc > val->min_cyc) ? val->min_cyc : min_cyc;
}
void min_values_t::update_min_values(const uca_org_t & res)
{
min_delay = (min_delay > res.access_time) ? res.access_time : min_delay;
min_dyn = (min_dyn > res.power.readOp.dynamic) ? res.power.readOp.dynamic : min_dyn;
min_leakage = (min_leakage > res.power.readOp.leakage) ? res.power.readOp.leakage : min_leakage;
min_area = (min_area > res.area) ? res.area : min_area;
min_cyc = (min_cyc > res.cycle_time) ? res.cycle_time : min_cyc;
}
void min_values_t::update_min_values(const nuca_org_t * res)
{
min_delay = (min_delay > res->nuca_pda.delay) ? res->nuca_pda.delay : min_delay;
min_dyn = (min_dyn > res->nuca_pda.power.readOp.dynamic) ? res->nuca_pda.power.readOp.dynamic : min_dyn;
min_leakage = (min_leakage > res->nuca_pda.power.readOp.leakage) ? res->nuca_pda.power.readOp.leakage : min_leakage;
min_area = (min_area > res->nuca_pda.area.get_area()) ? res->nuca_pda.area.get_area() : min_area;
min_cyc = (min_cyc > res->nuca_pda.cycle_time) ? res->nuca_pda.cycle_time : min_cyc;
}
void min_values_t::update_min_values(const mem_array * res)
{
min_delay = (min_delay > res->access_time) ? res->access_time : min_delay;
min_dyn = (min_dyn > res->power.readOp.dynamic) ? res->power.readOp.dynamic : min_dyn;
min_leakage = (min_leakage > res->power.readOp.leakage) ? res->power.readOp.leakage : min_leakage;
min_area = (min_area > res->area) ? res->area : min_area;
min_cyc = (min_cyc > res->cycle_time) ? res->cycle_time : min_cyc;
}
void * calc_time_mt_wrapper(void * void_obj)
{
calc_time_mt_wrapper_struct * calc_obj = (calc_time_mt_wrapper_struct *) void_obj;
uint32_t tid = calc_obj->tid;
list<mem_array *> & data_arr = calc_obj->data_arr;
list<mem_array *> & tag_arr = calc_obj->tag_arr;
bool is_tag = calc_obj->is_tag;
bool pure_ram = calc_obj->pure_ram;
bool pure_cam = calc_obj->pure_cam;
bool is_main_mem = calc_obj->is_main_mem;
double Nspd_min = calc_obj->Nspd_min;
min_values_t * data_res = calc_obj->data_res;
min_values_t * tag_res = calc_obj->tag_res;
data_arr.clear();
data_arr.push_back(new mem_array);
tag_arr.clear();
tag_arr.push_back(new mem_array);
uint32_t Ndwl_niter = _log2(MAXDATAN) + 1;
uint32_t Ndbl_niter = _log2(MAXDATAN) + 1;
uint32_t Ndcm_niter = _log2(MAX_COL_MUX) + 1;
uint32_t niter = Ndwl_niter * Ndbl_niter * Ndcm_niter;
bool is_valid_partition;
int wt_min, wt_max;
if (g_ip->force_wiretype) {
if (g_ip->wt == 0) {
wt_min = Low_swing;
wt_max = Low_swing;
}
else {
wt_min = Global;
wt_max = Low_swing-1;
}
}
else {
wt_min = Global;
wt_max = Low_swing;
}
for (double Nspd = Nspd_min; Nspd <= MAXDATASPD; Nspd *= 2)
{
for (int wr = wt_min; wr <= wt_max; wr++)
{
for (uint32_t iter = tid; iter < niter; iter += nthreads)
{
// reconstruct Ndwl, Ndbl, Ndcm
unsigned int Ndwl = 1 << (iter / (Ndbl_niter * Ndcm_niter));
unsigned int Ndbl = 1 << ((iter / (Ndcm_niter))%Ndbl_niter);
unsigned int Ndcm = 1 << (iter % Ndcm_niter);
for(unsigned int Ndsam_lev_1 = 1; Ndsam_lev_1 <= MAX_COL_MUX; Ndsam_lev_1 *= 2)
{
for(unsigned int Ndsam_lev_2 = 1; Ndsam_lev_2 <= MAX_COL_MUX; Ndsam_lev_2 *= 2)
{
//for debuging
if (g_ip->force_cache_config && is_tag == false)
{
wr = g_ip->wt;
Ndwl = g_ip->ndwl;
Ndbl = g_ip->ndbl;
Ndcm = g_ip->ndcm;
if(g_ip->nspd != 0) {
Nspd = g_ip->nspd;
}
if(g_ip->ndsam1 != 0) {
Ndsam_lev_1 = g_ip->ndsam1;
Ndsam_lev_2 = g_ip->ndsam2;
}
}
if (is_tag == true)
{
is_valid_partition = calculate_time(is_tag, pure_ram, pure_cam, Nspd, Ndwl,
Ndbl, Ndcm, Ndsam_lev_1, Ndsam_lev_2,
tag_arr.back(), 0, NULL, NULL,
is_main_mem);
}
// If it's a fully-associative cache, the data array partition parameters are identical to that of
// the tag array, so compute data array partition properties also here.
if (is_tag == false || g_ip->fully_assoc)
{
is_valid_partition = calculate_time(is_tag/*false*/, pure_ram, pure_cam, Nspd, Ndwl,
Ndbl, Ndcm, Ndsam_lev_1, Ndsam_lev_2,
data_arr.back(), 0, NULL, NULL,
is_main_mem);
}
if (is_valid_partition)
{
if (is_tag == true)
{
tag_arr.back()->wt = (enum Wire_type) wr;
tag_res->update_min_values(tag_arr.back());
tag_arr.push_back(new mem_array);
}
if (is_tag == false || g_ip->fully_assoc)
{
data_arr.back()->wt = (enum Wire_type) wr;
data_res->update_min_values(data_arr.back());
data_arr.push_back(new mem_array);
}
}
if (g_ip->force_cache_config && is_tag == false)
{
wr = wt_max;
iter = niter;
if(g_ip->nspd != 0) {
Nspd = MAXDATASPD;
}
if (g_ip->ndsam1 != 0) {
Ndsam_lev_1 = MAX_COL_MUX+1;
Ndsam_lev_2 = MAX_COL_MUX+1;
}
}
}
}
}
}
}
delete data_arr.back();
delete tag_arr.back();
data_arr.pop_back();
tag_arr.pop_back();
pthread_exit(NULL);
}
bool calculate_time(
bool is_tag,
int pure_ram,
bool pure_cam,
double Nspd,
unsigned int Ndwl,
unsigned int Ndbl,
unsigned int Ndcm,
unsigned int Ndsam_lev_1,
unsigned int Ndsam_lev_2,
mem_array *ptr_array,
int flag_results_populate,
results_mem_array *ptr_results,
uca_org_t *ptr_fin_res,
bool is_main_mem)
{
DynamicParameter dyn_p(is_tag, pure_ram, pure_cam, Nspd, Ndwl, Ndbl, Ndcm, Ndsam_lev_1, Ndsam_lev_2, is_main_mem);
if (dyn_p.is_valid == false)
{
return false;
}
UCA * uca = new UCA(dyn_p);
if (flag_results_populate)
{ //For the final solution, populate the ptr_results data structure -- TODO: copy only necessary variables
}
else
{
int num_act_mats_hor_dir = uca->bank.dp.num_act_mats_hor_dir;
int num_mats = uca->bank.dp.num_mats;
bool is_fa = uca->bank.dp.fully_assoc;
bool pure_cam = uca->bank.dp.pure_cam;
ptr_array->Ndwl = Ndwl;
ptr_array->Ndbl = Ndbl;
ptr_array->Nspd = Nspd;
ptr_array->deg_bl_muxing = dyn_p.deg_bl_muxing;
ptr_array->Ndsam_lev_1 = Ndsam_lev_1;
ptr_array->Ndsam_lev_2 = Ndsam_lev_2;
ptr_array->access_time = uca->access_time;
ptr_array->cycle_time = uca->cycle_time;
ptr_array->multisubbank_interleave_cycle_time = uca->multisubbank_interleave_cycle_time;
ptr_array->area_ram_cells = uca->area_all_dataramcells;
ptr_array->area = uca->area.get_area();
ptr_array->height = uca->area.h;
ptr_array->width = uca->area.w;
ptr_array->mat_height = uca->bank.mat.area.h;
ptr_array->mat_length = uca->bank.mat.area.w;
ptr_array->subarray_height = uca->bank.mat.subarray.area.h;
ptr_array->subarray_length = uca->bank.mat.subarray.area.w;
ptr_array->power = uca->power;
ptr_array->delay_senseamp_mux_decoder =
MAX(uca->delay_array_to_sa_mux_lev_1_decoder,
uca->delay_array_to_sa_mux_lev_2_decoder);
ptr_array->delay_before_subarray_output_driver = uca->delay_before_subarray_output_driver;
ptr_array->delay_from_subarray_output_driver_to_output = uca->delay_from_subarray_out_drv_to_out;
ptr_array->delay_route_to_bank = uca->htree_in_add->delay;
ptr_array->delay_input_htree = uca->bank.htree_in_add->delay;
ptr_array->delay_row_predecode_driver_and_block = uca->bank.mat.r_predec->delay;
ptr_array->delay_row_decoder = uca->bank.mat.row_dec->delay;
ptr_array->delay_bitlines = uca->bank.mat.delay_bitline;
ptr_array->delay_matchlines = uca->bank.mat.delay_matchchline;
ptr_array->delay_sense_amp = uca->bank.mat.delay_sa;
ptr_array->delay_subarray_output_driver = uca->bank.mat.delay_subarray_out_drv_htree;
ptr_array->delay_dout_htree = uca->bank.htree_out_data->delay;
ptr_array->delay_comparator = uca->bank.mat.delay_comparator;
ptr_array->all_banks_height = uca->area.h;
ptr_array->all_banks_width = uca->area.w;
ptr_array->area_efficiency = uca->area_all_dataramcells * 100 / (uca->area.get_area());
ptr_array->power_routing_to_bank = uca->power_routing_to_bank;
ptr_array->power_addr_input_htree = uca->bank.htree_in_add->power;
ptr_array->power_data_input_htree = uca->bank.htree_in_data->power;
// cout<<"power_data_input_htree"<<uca->bank.htree_in_data->power.readOp.leakage<<endl;
ptr_array->power_data_output_htree = uca->bank.htree_out_data->power;
// cout<<"power_data_output_htree"<<uca->bank.htree_out_data->power.readOp.leakage<<endl;
ptr_array->power_row_predecoder_drivers = uca->bank.mat.r_predec->driver_power;
ptr_array->power_row_predecoder_drivers.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_predecoder_drivers.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_predecoder_drivers.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_predecoder_blocks = uca->bank.mat.r_predec->block_power;
ptr_array->power_row_predecoder_blocks.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_predecoder_blocks.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_predecoder_blocks.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_decoders = uca->bank.mat.power_row_decoders;
ptr_array->power_row_decoders.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_decoders.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_row_decoders.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_predecoder_drivers = uca->bank.mat.b_mux_predec->driver_power;
ptr_array->power_bit_mux_predecoder_drivers.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_predecoder_drivers.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_predecoder_drivers.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_predecoder_blocks = uca->bank.mat.b_mux_predec->block_power;
ptr_array->power_bit_mux_predecoder_blocks.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_predecoder_blocks.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_predecoder_blocks.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_decoders = uca->bank.mat.power_bit_mux_decoders;
ptr_array->power_bit_mux_decoders.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_decoders.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bit_mux_decoders.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_predecoder_drivers = uca->bank.mat.sa_mux_lev_1_predec->driver_power;
ptr_array->power_senseamp_mux_lev_1_predecoder_drivers .readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_predecoder_drivers .writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_predecoder_drivers .searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_predecoder_blocks = uca->bank.mat.sa_mux_lev_1_predec->block_power;
ptr_array->power_senseamp_mux_lev_1_predecoder_blocks.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_predecoder_blocks.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_predecoder_blocks.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_decoders = uca->bank.mat.power_sa_mux_lev_1_decoders;
ptr_array->power_senseamp_mux_lev_1_decoders.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_decoders.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_1_decoders.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_predecoder_drivers = uca->bank.mat.sa_mux_lev_2_predec->driver_power;
ptr_array->power_senseamp_mux_lev_2_predecoder_drivers.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_predecoder_drivers.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_predecoder_drivers.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_predecoder_blocks = uca->bank.mat.sa_mux_lev_2_predec->block_power;
ptr_array->power_senseamp_mux_lev_2_predecoder_blocks.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_predecoder_blocks.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_predecoder_blocks.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_decoders = uca->bank.mat.power_sa_mux_lev_2_decoders;
ptr_array->power_senseamp_mux_lev_2_decoders .readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_decoders .writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_senseamp_mux_lev_2_decoders .searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bitlines = uca->bank.mat.power_bitline;
ptr_array->power_bitlines.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bitlines.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_bitlines.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_sense_amps = uca->bank.mat.power_sa;
ptr_array->power_sense_amps.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_sense_amps.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_sense_amps.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_prechg_eq_drivers = uca->bank.mat.power_bl_precharge_eq_drv;
ptr_array->power_prechg_eq_drivers.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_prechg_eq_drivers.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_prechg_eq_drivers.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_output_drivers_at_subarray = uca->bank.mat.power_subarray_out_drv;
ptr_array->power_output_drivers_at_subarray.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_output_drivers_at_subarray.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_output_drivers_at_subarray.searchOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_comparators = uca->bank.mat.power_comparator;
ptr_array->power_comparators.readOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_comparators.writeOp.dynamic *= num_act_mats_hor_dir;
ptr_array->power_comparators.searchOp.dynamic *= num_act_mats_hor_dir;
// cout << " num of mats: " << dyn_p.num_mats << endl;
if (is_fa || pure_cam)
{
ptr_array->power_htree_in_search = uca->bank.htree_in_search->power;
// cout<<"power_htree_in_search"<<uca->bank.htree_in_search->power.readOp.leakage<<endl;
ptr_array->power_htree_out_search = uca->bank.htree_out_search->power;
// cout<<"power_htree_out_search"<<uca->bank.htree_out_search->power.readOp.leakage<<endl;
ptr_array->power_searchline = uca->bank.mat.power_searchline;
// cout<<"power_searchlineh"<<uca->bank.mat.power_searchline.readOp.leakage<<endl;
ptr_array->power_searchline.searchOp.dynamic *= num_mats;
ptr_array->power_searchline_precharge = uca->bank.mat.power_searchline_precharge;
ptr_array->power_searchline_precharge.searchOp.dynamic *= num_mats;
ptr_array->power_matchlines = uca->bank.mat.power_matchline;
ptr_array->power_matchlines.searchOp.dynamic *= num_mats;
ptr_array->power_matchline_precharge = uca->bank.mat.power_matchline_precharge;
ptr_array->power_matchline_precharge.searchOp.dynamic *= num_mats;
ptr_array->power_matchline_to_wordline_drv = uca->bank.mat.power_ml_to_ram_wl_drv;
// cout<<"power_matchline.searchOp.leakage"<<uca->bank.mat.power_matchline.searchOp.leakage<<endl;
}
ptr_array->activate_energy = uca->activate_energy;
ptr_array->read_energy = uca->read_energy;
ptr_array->write_energy = uca->write_energy;
ptr_array->precharge_energy = uca->precharge_energy;
ptr_array->refresh_power = uca->refresh_power;
ptr_array->leak_power_subbank_closed_page = uca->leak_power_subbank_closed_page;
ptr_array->leak_power_subbank_open_page = uca->leak_power_subbank_open_page;
ptr_array->leak_power_request_and_reply_networks = uca->leak_power_request_and_reply_networks;
ptr_array->precharge_delay = uca->precharge_delay;
// cout<<"power_matchline.searchOp.leakage"<<uca->bank.mat.<<endl;
//
// if (!(is_fa || pure_cam))
// {
// cout << " num of cols: " << dyn_p.num_c_subarray << endl;
// }
// else if (is_fa)
// {
// cout << " num of cols: " << dyn_p.tag_num_c_subarray+ dyn_p.data_num_c_subarray<< endl;
// } else
// cout << " num of cols: " << dyn_p.tag_num_c_subarray<< endl;
// cout << uca->bank.mat.subarray.get_total_cell_area()<<endl;
}
delete uca;
return true;
}
bool check_uca_org(uca_org_t & u, min_values_t *minval)
{
if (((u.access_time - minval->min_delay)*100/minval->min_delay) > g_ip->delay_dev) {
return false;
}
if (((u.power.readOp.dynamic - minval->min_dyn)/minval->min_dyn)*100 >
g_ip->dynamic_power_dev) {
return false;
}
if (((u.power.readOp.leakage - minval->min_leakage)/minval->min_leakage)*100 >
g_ip->leakage_power_dev) {
return false;
}
if (((u.cycle_time - minval->min_cyc)/minval->min_cyc)*100 >
g_ip->cycle_time_dev) {
return false;
}
if (((u.area - minval->min_area)/minval->min_area)*100 >
g_ip->area_dev) {
return false;
}
return true;
}
bool check_mem_org(mem_array & u, const min_values_t *minval)
{
if (((u.access_time - minval->min_delay)*100/minval->min_delay) > g_ip->delay_dev) {
return false;
}
if (((u.power.readOp.dynamic - minval->min_dyn)/minval->min_dyn)*100 >
g_ip->dynamic_power_dev) {
return false;
}
if (((u.power.readOp.leakage - minval->min_leakage)/minval->min_leakage)*100 >
g_ip->leakage_power_dev) {
return false;
}
if (((u.cycle_time - minval->min_cyc)/minval->min_cyc)*100 >
g_ip->cycle_time_dev) {
return false;
}
if (((u.area - minval->min_area)/minval->min_area)*100 >
g_ip->area_dev) {
return false;
}
return true;
}
void find_optimal_uca(uca_org_t *res, min_values_t * minval, list<uca_org_t> & ulist)
{
double cost = 0;
double min_cost = BIGNUM;
float d, a, dp, lp, c;
dp = g_ip->dynamic_power_wt;
lp = g_ip->leakage_power_wt;
a = g_ip->area_wt;
d = g_ip->delay_wt;
c = g_ip->cycle_time_wt;
if (ulist.empty() == true)
{
cout << "ERROR: no valid cache organizations found" << endl;
exit(0);
}
for (list<uca_org_t>::iterator niter = ulist.begin(); niter != ulist.end(); niter++)
{
if (g_ip->ed == 1)
{
cost = ((niter)->access_time/minval->min_delay) * ((niter)->power.readOp.dynamic/minval->min_dyn);
if (min_cost > cost)
{
min_cost = cost;
*res = (*(niter));
}
}
else if (g_ip->ed == 2)
{
cost = ((niter)->access_time/minval->min_delay)*
((niter)->access_time/minval->min_delay)*
((niter)->power.readOp.dynamic/minval->min_dyn);
if (min_cost > cost)
{
min_cost = cost;
*res = (*(niter));
}
}
else
{
/*
* check whether the current organization
* meets the input deviation constraints
*/
bool v = check_uca_org(*niter, minval);
//if (minval->min_leakage == 0) minval->min_leakage = 0.1; //FIXME remove this after leakage modeling
if (v)
{
cost = (d * ((niter)->access_time/minval->min_delay) +
c * ((niter)->cycle_time/minval->min_cyc) +
dp * ((niter)->power.readOp.dynamic/minval->min_dyn) +
lp * ((niter)->power.readOp.leakage/minval->min_leakage) +
a * ((niter)->area/minval->min_area));
//fprintf(stderr, "cost = %g\n", cost);
if (min_cost > cost) {
min_cost = cost;
*res = (*(niter));
niter = ulist.erase(niter);
if (niter!=ulist.begin())
niter--;
}
}
else {
niter = ulist.erase(niter);
if (niter!=ulist.begin())
niter--;
}
}
}
if (min_cost == BIGNUM)
{
cout << "ERROR: no cache organizations met optimization criteria" << endl;
exit(0);
}
}
void filter_tag_arr(const min_values_t * min, list<mem_array *> & list)
{
double cost = BIGNUM;
double cur_cost;
double wt_delay = g_ip->delay_wt, wt_dyn = g_ip->dynamic_power_wt, wt_leakage = g_ip->leakage_power_wt, wt_cyc = g_ip->cycle_time_wt, wt_area = g_ip->area_wt;
mem_array * res = NULL;
if (list.empty() == true)
{
cout << "ERROR: no valid tag organizations found" << endl;
exit(1);
}
while (list.empty() != true)
{
bool v = check_mem_org(*list.back(), min);
if (v)
{
cur_cost = wt_delay * (list.back()->access_time/min->min_delay) +
wt_dyn * (list.back()->power.readOp.dynamic/min->min_dyn) +
wt_leakage * (list.back()->power.readOp.leakage/min->min_leakage) +
wt_area * (list.back()->area/min->min_area) +
wt_cyc * (list.back()->cycle_time/min->min_cyc);
}
else
{
cur_cost = BIGNUM;
}
if (cur_cost < cost)
{
if (res != NULL)
{
delete res;
}
cost = cur_cost;
res = list.back();
}
else
{
delete list.back();
}
list.pop_back();
}
if(!res)
{
cout << "ERROR: no valid tag organizations found" << endl;
exit(0);
}
list.push_back(res);
}
void filter_data_arr(list<mem_array *> & curr_list)
{
if (curr_list.empty() == true)
{
cout << "ERROR: no valid data array organizations found" << endl;
exit(1);
}
list<mem_array *>::iterator iter;
for (iter = curr_list.begin(); iter != curr_list.end(); ++iter)
{
mem_array * m = *iter;
if (m == NULL) exit(1);
if(((m->access_time - m->arr_min->min_delay)/m->arr_min->min_delay > 0.5) &&
((m->power.readOp.dynamic - m->arr_min->min_dyn)/m->arr_min->min_dyn > 0.5))
{
delete m;
iter = curr_list.erase(iter);
iter --;
}
}
}
/*
* Performs exhaustive search across different sub-array sizes,
* wire types and aspect ratios to find an optimal UCA organization
* 1. First different valid tag array organizations are calculated
* and stored in tag_arr array
* 2. The exhaustive search is repeated to find valid data array
* organizations and stored in data_arr array
* 3. Cache area, delay, power, and cycle time for different
* cache organizations are calculated based on the
* above results
* 4. Cache model with least cost is picked from sol_list
*/
void solve(uca_org_t *fin_res)
{
bool is_dram = false;
int pure_ram = g_ip->pure_ram;
bool pure_cam = g_ip->pure_cam;
init_tech_params(g_ip->F_sz_um, false);
list<mem_array *> tag_arr (0);
list<mem_array *> data_arr(0);
list<mem_array *>::iterator miter;
list<uca_org_t> sol_list(1, uca_org_t());
fin_res->tag_array.access_time = 0;
fin_res->tag_array.Ndwl = 0;
fin_res->tag_array.Ndbl = 0;
fin_res->tag_array.Nspd = 0;
fin_res->tag_array.deg_bl_muxing = 0;
fin_res->tag_array.Ndsam_lev_1 = 0;
fin_res->tag_array.Ndsam_lev_2 = 0;
// distribute calculate_time() execution to multiple threads
calc_time_mt_wrapper_struct * calc_array = new calc_time_mt_wrapper_struct[nthreads];
pthread_t threads[nthreads];
for (uint32_t t = 0; t < nthreads; t++)
{
calc_array[t].tid = t;
calc_array[t].pure_ram = pure_ram;
calc_array[t].pure_cam = pure_cam;
calc_array[t].data_res = new min_values_t();
calc_array[t].tag_res = new min_values_t();
}
bool is_tag;
uint32_t ram_cell_tech_type;
// If it's a cache, first calculate the area, delay and power for all tag array partitions.
if (!(pure_ram||pure_cam||g_ip->fully_assoc))
{ //cache
is_tag = true;
ram_cell_tech_type = g_ip->tag_arr_ram_cell_tech_type;
is_dram = ((ram_cell_tech_type == lp_dram) || (ram_cell_tech_type == comm_dram));
init_tech_params(g_ip->F_sz_um, is_tag);
for (uint32_t t = 0; t < nthreads; t++)
{
calc_array[t].is_tag = is_tag;
calc_array[t].is_main_mem = false;
calc_array[t].Nspd_min = 0.125;
pthread_create(&threads[t], NULL, calc_time_mt_wrapper, (void *)(&(calc_array[t])));
}
for (uint32_t t = 0; t < nthreads; t++)
{
pthread_join(threads[t], NULL);
}
for (uint32_t t = 0; t < nthreads; t++)
{
calc_array[t].data_arr.sort(mem_array::lt);
data_arr.merge(calc_array[t].data_arr, mem_array::lt);
calc_array[t].tag_arr.sort(mem_array::lt);
tag_arr.merge(calc_array[t].tag_arr, mem_array::lt);
}
}
// calculate the area, delay and power for all data array partitions (for cache or plain RAM).
// if (!g_ip->fully_assoc)
// {//in the new cacti, cam, fully_associative cache are processed as single array in the data portion
is_tag = false;
ram_cell_tech_type = g_ip->data_arr_ram_cell_tech_type;
is_dram = ((ram_cell_tech_type == lp_dram) || (ram_cell_tech_type == comm_dram));
init_tech_params(g_ip->F_sz_um, is_tag);
for (uint32_t t = 0; t < nthreads; t++)
{
calc_array[t].is_tag = is_tag;
calc_array[t].is_main_mem = g_ip->is_main_mem;
if (!(pure_cam||g_ip->fully_assoc))
{
calc_array[t].Nspd_min = (double)(g_ip->out_w)/(double)(g_ip->block_sz*8);
}
else
{
calc_array[t].Nspd_min = 1;
}
pthread_create(&threads[t], NULL, calc_time_mt_wrapper, (void *)(&(calc_array[t])));
}
for (uint32_t t = 0; t < nthreads; t++)
{
pthread_join(threads[t], NULL);
}
data_arr.clear();
for (uint32_t t = 0; t < nthreads; t++)
{
calc_array[t].data_arr.sort(mem_array::lt);
data_arr.merge(calc_array[t].data_arr, mem_array::lt);
}
// }
min_values_t * d_min = new min_values_t();
min_values_t * t_min = new min_values_t();
min_values_t * cache_min = new min_values_t();
for (uint32_t t = 0; t < nthreads; t++)
{
d_min->update_min_values(calc_array[t].data_res);
t_min->update_min_values(calc_array[t].tag_res);
}
for (miter = data_arr.begin(); miter != data_arr.end(); miter++)
{
(*miter)->arr_min = d_min;
}
//cout << data_arr.size() << "\t" << tag_arr.size() <<" before\n";
filter_data_arr(data_arr);
if(!(pure_ram||pure_cam||g_ip->fully_assoc))
{
filter_tag_arr(t_min, tag_arr);
}
//cout << data_arr.size() << "\t" << tag_arr.size() <<" after\n";
if (pure_ram||pure_cam||g_ip->fully_assoc)
{
for (miter = data_arr.begin(); miter != data_arr.end(); miter++)
{
uca_org_t & curr_org = sol_list.back();
curr_org.tag_array2 = NULL;
curr_org.data_array2 = (*miter);
curr_org.find_delay();
curr_org.find_energy();
curr_org.find_area();
curr_org.find_cyc();
//update min values for the entire cache
cache_min->update_min_values(curr_org);
sol_list.push_back(uca_org_t());
}
}
else
{
while (tag_arr.empty() != true)
{
mem_array * arr_temp = (tag_arr.back());
//delete tag_arr.back();
tag_arr.pop_back();
for (miter = data_arr.begin(); miter != data_arr.end(); miter++)
{
uca_org_t & curr_org = sol_list.back();
curr_org.tag_array2 = arr_temp;
curr_org.data_array2 = (*miter);
curr_org.find_delay();
curr_org.find_energy();
curr_org.find_area();
curr_org.find_cyc();
//update min values for the entire cache
cache_min->update_min_values(curr_org);
sol_list.push_back(uca_org_t());
}
}
}
sol_list.pop_back();
find_optimal_uca(fin_res, cache_min, sol_list);
sol_list.clear();
for (miter = data_arr.begin(); miter != data_arr.end(); ++miter)
{
if (*miter != fin_res->data_array2)
{
delete *miter;
}
}
data_arr.clear();
for (uint32_t t = 0; t < nthreads; t++)
{
delete calc_array[t].data_res;
delete calc_array[t].tag_res;
}
delete [] calc_array;
delete cache_min;
delete d_min;
delete t_min;
}
void update(uca_org_t *fin_res)
{
if(fin_res->tag_array2)
{
init_tech_params(g_ip->F_sz_um,true);
DynamicParameter tag_arr_dyn_p(true, g_ip->pure_ram, g_ip->pure_cam, fin_res->tag_array2->Nspd, fin_res->tag_array2->Ndwl, fin_res->tag_array2->Ndbl, fin_res->tag_array2->Ndcm, fin_res->tag_array2->Ndsam_lev_1, fin_res->tag_array2->Ndsam_lev_2, g_ip->is_main_mem);
if(tag_arr_dyn_p.is_valid)
{
UCA * tag_arr = new UCA(tag_arr_dyn_p);
fin_res->tag_array2->power = tag_arr->power;
}
else
{
cout << "ERROR: Cannot retrieve array structure for leakage feedback" << endl;
exit(1);
}
}
init_tech_params(g_ip->F_sz_um,false);
DynamicParameter data_arr_dyn_p(false, g_ip->pure_ram, g_ip->pure_cam, fin_res->data_array2->Nspd, fin_res->data_array2->Ndwl, fin_res->data_array2->Ndbl, fin_res->data_array2->Ndcm, fin_res->data_array2->Ndsam_lev_1, fin_res->data_array2->Ndsam_lev_2, g_ip->is_main_mem);
if(data_arr_dyn_p.is_valid)
{
UCA * data_arr = new UCA(data_arr_dyn_p);
fin_res->data_array2->power = data_arr->power;
}
else
{
cout << "ERROR: Cannot retrieve array structure for leakage feedback" << endl;
exit(1);
}
fin_res->find_energy();
}
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