uca.cc revision 10234
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2 *                                McPAT/CACTI
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32
33
34
35#include <cmath>
36#include <iostream>
37
38#include "uca.h"
39
40UCA::UCA(const DynamicParameter & dyn_p)
41    : dp(dyn_p), bank(dp), nbanks(g_ip->nbanks), refresh_power(0) {
42    int num_banks_ver_dir = 1 << ((bank.area.h > bank.area.w) ? _log2(nbanks)
43                                  / 2 : (_log2(nbanks) - _log2(nbanks) / 2));
44    int num_banks_hor_dir = nbanks / num_banks_ver_dir;
45
46    if (dp.use_inp_params) {
47        RWP  = dp.num_rw_ports;
48        ERP  = dp.num_rd_ports;
49        EWP  = dp.num_wr_ports;
50        SCHP = dp.num_search_ports;
51    } else {
52        RWP  = g_ip->num_rw_ports;
53        ERP  = g_ip->num_rd_ports;
54        EWP  = g_ip->num_wr_ports;
55        SCHP = g_ip->num_search_ports;
56    }
57
58    num_addr_b_bank = (dp.number_addr_bits_mat + dp.number_subbanks_decode) *
59        (RWP + ERP + EWP);
60    num_di_b_bank   = dp.num_di_b_bank_per_port * (RWP + EWP);
61    num_do_b_bank   = dp.num_do_b_bank_per_port * (RWP + ERP);
62    num_si_b_bank   = dp.num_si_b_bank_per_port * SCHP;
63    num_so_b_bank   = dp.num_so_b_bank_per_port * SCHP;
64
65    if (!dp.fully_assoc && !dp.pure_cam) {
66
67        if (g_ip->fast_access && dp.is_tag == false) {
68            num_do_b_bank *= g_ip->data_assoc;
69        }
70
71        htree_in_add = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
72                                  num_addr_b_bank, num_di_b_bank, 0,
73                                  num_do_b_bank, 0, num_banks_ver_dir * 2,
74                                  num_banks_hor_dir * 2, Add_htree, true);
75        htree_in_data = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
76                                   num_addr_b_bank, num_di_b_bank, 0,
77                                   num_do_b_bank, 0, num_banks_ver_dir * 2,
78                                   num_banks_hor_dir * 2, Data_in_htree, true);
79        htree_out_data = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
80                                    num_addr_b_bank, num_di_b_bank, 0,
81                                    num_do_b_bank, 0, num_banks_ver_dir * 2,
82                                    num_banks_hor_dir * 2, Data_out_htree, true);
83    }
84
85    else {
86
87        htree_in_add = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
88                                  num_addr_b_bank, num_di_b_bank,
89                                  num_si_b_bank, num_do_b_bank, num_so_b_bank,
90                                  num_banks_ver_dir * 2, num_banks_hor_dir * 2,
91                                  Add_htree, true);
92        htree_in_data = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
93                                   num_addr_b_bank, num_di_b_bank,
94                                   num_si_b_bank, num_do_b_bank, num_so_b_bank,
95                                   num_banks_ver_dir * 2, num_banks_hor_dir * 2,
96                                   Data_in_htree, true);
97        htree_out_data = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
98                                    num_addr_b_bank, num_di_b_bank,
99                                    num_si_b_bank, num_do_b_bank,
100                                    num_so_b_bank, num_banks_ver_dir * 2,
101                                    num_banks_hor_dir * 2, Data_out_htree, true);
102        htree_in_search = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
103                                     num_addr_b_bank, num_di_b_bank,
104                                     num_si_b_bank, num_do_b_bank,
105                                     num_so_b_bank, num_banks_ver_dir * 2,
106                                     num_banks_hor_dir * 2, Data_in_htree, true);
107        htree_out_search = new Htree2(g_ip->wt, bank.area.w, bank.area.h,
108                                      num_addr_b_bank, num_di_b_bank,
109                                      num_si_b_bank, num_do_b_bank,
110                                      num_so_b_bank, num_banks_ver_dir * 2,
111                                      num_banks_hor_dir * 2, Data_out_htree,
112                                      true);
113    }
114
115    area.w = htree_in_data->area.w;
116    area.h = htree_in_data->area.h;
117
118    area_all_dataramcells = bank.mat.subarray.get_total_cell_area() * dp.num_subarrays * g_ip->nbanks;
119//  cout<<"area cell"<<area_all_dataramcells<<endl;
120//  cout<<area.get_area()<<endl;
121    // delay calculation
122    double inrisetime = 0.0;
123    compute_delays(inrisetime);
124    compute_power_energy();
125}
126
127
128
129UCA::~UCA() {
130    delete htree_in_add;
131    delete htree_in_data;
132    delete htree_out_data;
133}
134
135
136
137double UCA::compute_delays(double inrisetime) {
138    double outrisetime = bank.compute_delays(inrisetime);
139
140    double delay_array_to_mat = htree_in_add->delay + bank.htree_in_add->delay;
141    double max_delay_before_row_decoder = delay_array_to_mat + bank.mat.r_predec->delay;
142    delay_array_to_sa_mux_lev_1_decoder = delay_array_to_mat +
143                                          bank.mat.sa_mux_lev_1_predec->delay +
144                                          bank.mat.sa_mux_lev_1_dec->delay;
145    delay_array_to_sa_mux_lev_2_decoder = delay_array_to_mat +
146                                          bank.mat.sa_mux_lev_2_predec->delay +
147                                          bank.mat.sa_mux_lev_2_dec->delay;
148    double delay_inside_mat = bank.mat.row_dec->delay + bank.mat.delay_bitline + bank.mat.delay_sa;
149
150    delay_before_subarray_output_driver =
151        MAX(MAX(max_delay_before_row_decoder + delay_inside_mat,  // row_path
152                delay_array_to_mat + bank.mat.b_mux_predec->delay + bank.mat.bit_mux_dec->delay + bank.mat.delay_sa),  // col_path
153            MAX(delay_array_to_sa_mux_lev_1_decoder,    // sa_mux_lev_1_path
154                delay_array_to_sa_mux_lev_2_decoder));  // sa_mux_lev_2_path
155    delay_from_subarray_out_drv_to_out = bank.mat.delay_subarray_out_drv_htree +
156                                         bank.htree_out_data->delay + htree_out_data->delay;
157    access_time                        = bank.mat.delay_comparator;
158
159    double ram_delay_inside_mat;
160    if (dp.fully_assoc) {
161        //delay of FA contains both CAM tag and RAM data
162        { //delay of CAM
163            ram_delay_inside_mat = bank.mat.delay_bitline + bank.mat.delay_matchchline;
164            access_time = htree_in_add->delay + bank.htree_in_add->delay;
165            //delay of fully-associative data array
166            access_time += ram_delay_inside_mat + delay_from_subarray_out_drv_to_out;
167        }
168    } else {
169        access_time = delay_before_subarray_output_driver + delay_from_subarray_out_drv_to_out; //data_acc_path
170    }
171
172    if (dp.is_main_mem) {
173        double t_rcd       = max_delay_before_row_decoder + delay_inside_mat;
174        double cas_latency = MAX(delay_array_to_sa_mux_lev_1_decoder, delay_array_to_sa_mux_lev_2_decoder) +
175                             delay_from_subarray_out_drv_to_out;
176        access_time = t_rcd + cas_latency;
177    }
178
179    double temp;
180
181    if (!dp.fully_assoc) {
182        temp = delay_inside_mat + bank.mat.delay_wl_reset + bank.mat.delay_bl_restore;//TODO: Sheng: revisit
183        if (dp.is_dram) {
184            temp += bank.mat.delay_writeback;  // temp stores random cycle time
185        }
186
187
188        temp = MAX(temp, bank.mat.r_predec->delay);
189        temp = MAX(temp, bank.mat.b_mux_predec->delay);
190        temp = MAX(temp, bank.mat.sa_mux_lev_1_predec->delay);
191        temp = MAX(temp, bank.mat.sa_mux_lev_2_predec->delay);
192    } else {
193        ram_delay_inside_mat = bank.mat.delay_bitline + bank.mat.delay_matchchline;
194        temp = ram_delay_inside_mat + bank.mat.delay_cam_sl_restore + bank.mat.delay_cam_ml_reset + bank.mat.delay_bl_restore
195               + bank.mat.delay_hit_miss_reset + bank.mat.delay_wl_reset;
196
197        temp = MAX(temp, bank.mat.b_mux_predec->delay);//TODO: Sheng revisit whether distinguish cam and ram bitline etc.
198        temp = MAX(temp, bank.mat.sa_mux_lev_1_predec->delay);
199        temp = MAX(temp, bank.mat.sa_mux_lev_2_predec->delay);
200    }
201
202    // The following is true only if the input parameter "repeaters_in_htree" is set to false --Nav
203    if (g_ip->rpters_in_htree == false) {
204        temp = MAX(temp, bank.htree_in_add->max_unpipelined_link_delay);
205    }
206    cycle_time = temp;
207
208    double delay_req_network = max_delay_before_row_decoder;
209    double delay_rep_network = delay_from_subarray_out_drv_to_out;
210    multisubbank_interleave_cycle_time = MAX(delay_req_network, delay_rep_network);
211
212    if (dp.is_main_mem) {
213        multisubbank_interleave_cycle_time = htree_in_add->delay;
214        precharge_delay = htree_in_add->delay +
215                          bank.htree_in_add->delay + bank.mat.delay_writeback +
216                          bank.mat.delay_wl_reset + bank.mat.delay_bl_restore;
217        cycle_time = access_time + precharge_delay;
218    } else {
219        precharge_delay = 0;
220    }
221
222    double dram_array_availability = 0;
223    if (dp.is_dram) {
224        dram_array_availability = (1 - dp.num_r_subarray * cycle_time / dp.dram_refresh_period) * 100;
225    }
226
227    return outrisetime;
228}
229
230
231
232// note: currently, power numbers are for a bank of an array
233void UCA::compute_power_energy() {
234    bank.compute_power_energy();
235    power = bank.power;
236
237    power_routing_to_bank.readOp.dynamic  = htree_in_add->power.readOp.dynamic + htree_out_data->power.readOp.dynamic;
238    power_routing_to_bank.writeOp.dynamic = htree_in_add->power.readOp.dynamic + htree_in_data->power.readOp.dynamic;
239    if (dp.fully_assoc || dp.pure_cam)
240        power_routing_to_bank.searchOp.dynamic =
241            htree_in_search->power.searchOp.dynamic +
242            htree_out_search->power.searchOp.dynamic;
243
244    power_routing_to_bank.readOp.leakage +=
245        htree_in_add->power.readOp.leakage +
246        htree_in_data->power.readOp.leakage +
247        htree_out_data->power.readOp.leakage;
248
249    power_routing_to_bank.readOp.gate_leakage +=
250        htree_in_add->power.readOp.gate_leakage +
251        htree_in_data->power.readOp.gate_leakage +
252        htree_out_data->power.readOp.gate_leakage;
253    if (dp.fully_assoc || dp.pure_cam) {
254        power_routing_to_bank.readOp.leakage += htree_in_search->power.readOp.leakage + htree_out_search->power.readOp.leakage;
255        power_routing_to_bank.readOp.gate_leakage += htree_in_search->power.readOp.gate_leakage + htree_out_search->power.readOp.gate_leakage;
256    }
257
258    power.searchOp.dynamic += power_routing_to_bank.searchOp.dynamic;
259    power.readOp.dynamic += power_routing_to_bank.readOp.dynamic;
260    power.readOp.leakage += power_routing_to_bank.readOp.leakage;
261    power.readOp.gate_leakage += power_routing_to_bank.readOp.gate_leakage;
262
263    // calculate total write energy per access
264    power.writeOp.dynamic = power.readOp.dynamic
265                            - bank.mat.power_bitline.readOp.dynamic * dp.num_act_mats_hor_dir
266                            + bank.mat.power_bitline.writeOp.dynamic * dp.num_act_mats_hor_dir
267                            - power_routing_to_bank.readOp.dynamic
268                            + power_routing_to_bank.writeOp.dynamic
269                            + bank.htree_in_data->power.readOp.dynamic
270                            - bank.htree_out_data->power.readOp.dynamic;
271
272    if (dp.is_dram == false) {
273        power.writeOp.dynamic -= bank.mat.power_sa.readOp.dynamic * dp.num_act_mats_hor_dir;
274    }
275
276    dyn_read_energy_from_closed_page = power.readOp.dynamic;
277    dyn_read_energy_from_open_page   = power.readOp.dynamic -
278                                       (bank.mat.r_predec->power.readOp.dynamic +
279                                        bank.mat.power_row_decoders.readOp.dynamic +
280                                        bank.mat.power_bl_precharge_eq_drv.readOp.dynamic +
281                                        bank.mat.power_sa.readOp.dynamic +
282                                        bank.mat.power_bitline.readOp.dynamic) * dp.num_act_mats_hor_dir;
283
284    dyn_read_energy_remaining_words_in_burst =
285        (MAX((g_ip->burst_len / g_ip->int_prefetch_w), 1) - 1) *
286        ((bank.mat.sa_mux_lev_1_predec->power.readOp.dynamic +
287          bank.mat.sa_mux_lev_2_predec->power.readOp.dynamic +
288          bank.mat.power_sa_mux_lev_1_decoders.readOp.dynamic +
289          bank.mat.power_sa_mux_lev_2_decoders.readOp.dynamic +
290          bank.mat.power_subarray_out_drv.readOp.dynamic)     * dp.num_act_mats_hor_dir +
291         bank.htree_out_data->power.readOp.dynamic +
292         power_routing_to_bank.readOp.dynamic);
293    dyn_read_energy_from_closed_page += dyn_read_energy_remaining_words_in_burst;
294    dyn_read_energy_from_open_page   += dyn_read_energy_remaining_words_in_burst;
295
296    activate_energy = htree_in_add->power.readOp.dynamic +
297                      bank.htree_in_add->power_bit.readOp.dynamic * bank.num_addr_b_routed_to_mat_for_act +
298                      (bank.mat.r_predec->power.readOp.dynamic +
299                       bank.mat.power_row_decoders.readOp.dynamic +
300                       bank.mat.power_sa.readOp.dynamic) * dp.num_act_mats_hor_dir;
301    read_energy    = (htree_in_add->power.readOp.dynamic +
302                      bank.htree_in_add->power_bit.readOp.dynamic * bank.num_addr_b_routed_to_mat_for_rd_or_wr +
303                      (bank.mat.sa_mux_lev_1_predec->power.readOp.dynamic  +
304                       bank.mat.sa_mux_lev_2_predec->power.readOp.dynamic  +
305                       bank.mat.power_sa_mux_lev_1_decoders.readOp.dynamic +
306                       bank.mat.power_sa_mux_lev_2_decoders.readOp.dynamic +
307                       bank.mat.power_subarray_out_drv.readOp.dynamic) * dp.num_act_mats_hor_dir +
308                      bank.htree_out_data->power.readOp.dynamic +
309                      htree_in_data->power.readOp.dynamic) * g_ip->burst_len;
310    write_energy   = (htree_in_add->power.readOp.dynamic +
311                      bank.htree_in_add->power_bit.readOp.dynamic * bank.num_addr_b_routed_to_mat_for_rd_or_wr +
312                      htree_in_data->power.readOp.dynamic +
313                      bank.htree_in_data->power.readOp.dynamic +
314                      (bank.mat.sa_mux_lev_1_predec->power.readOp.dynamic  +
315                       bank.mat.sa_mux_lev_2_predec->power.readOp.dynamic  +
316                       bank.mat.power_sa_mux_lev_1_decoders.readOp.dynamic +
317                       bank.mat.power_sa_mux_lev_2_decoders.readOp.dynamic) * dp.num_act_mats_hor_dir) * g_ip->burst_len;
318    precharge_energy = (bank.mat.power_bitline.readOp.dynamic +
319                        bank.mat.power_bl_precharge_eq_drv.readOp.dynamic) * dp.num_act_mats_hor_dir;
320
321    leak_power_subbank_closed_page =
322        (bank.mat.r_predec->power.readOp.leakage +
323         bank.mat.b_mux_predec->power.readOp.leakage +
324         bank.mat.sa_mux_lev_1_predec->power.readOp.leakage +
325         bank.mat.sa_mux_lev_2_predec->power.readOp.leakage +
326         bank.mat.power_row_decoders.readOp.leakage +
327         bank.mat.power_bit_mux_decoders.readOp.leakage +
328         bank.mat.power_sa_mux_lev_1_decoders.readOp.leakage +
329         bank.mat.power_sa_mux_lev_2_decoders.readOp.leakage +
330         bank.mat.leak_power_sense_amps_closed_page_state) * dp.num_act_mats_hor_dir;
331
332    leak_power_subbank_closed_page +=
333        (bank.mat.r_predec->power.readOp.gate_leakage +
334         bank.mat.b_mux_predec->power.readOp.gate_leakage +
335         bank.mat.sa_mux_lev_1_predec->power.readOp.gate_leakage +
336         bank.mat.sa_mux_lev_2_predec->power.readOp.gate_leakage +
337         bank.mat.power_row_decoders.readOp.gate_leakage +
338         bank.mat.power_bit_mux_decoders.readOp.gate_leakage +
339         bank.mat.power_sa_mux_lev_1_decoders.readOp.gate_leakage +
340         bank.mat.power_sa_mux_lev_2_decoders.readOp.gate_leakage) * dp.num_act_mats_hor_dir; //+
341    //bank.mat.leak_power_sense_amps_closed_page_state) * dp.num_act_mats_hor_dir;
342
343    leak_power_subbank_open_page =
344        (bank.mat.r_predec->power.readOp.leakage +
345         bank.mat.b_mux_predec->power.readOp.leakage +
346         bank.mat.sa_mux_lev_1_predec->power.readOp.leakage +
347         bank.mat.sa_mux_lev_2_predec->power.readOp.leakage +
348         bank.mat.power_row_decoders.readOp.leakage +
349         bank.mat.power_bit_mux_decoders.readOp.leakage +
350         bank.mat.power_sa_mux_lev_1_decoders.readOp.leakage +
351         bank.mat.power_sa_mux_lev_2_decoders.readOp.leakage +
352         bank.mat.leak_power_sense_amps_open_page_state) * dp.num_act_mats_hor_dir;
353
354    leak_power_subbank_open_page +=
355        (bank.mat.r_predec->power.readOp.gate_leakage +
356         bank.mat.b_mux_predec->power.readOp.gate_leakage +
357         bank.mat.sa_mux_lev_1_predec->power.readOp.gate_leakage +
358         bank.mat.sa_mux_lev_2_predec->power.readOp.gate_leakage +
359         bank.mat.power_row_decoders.readOp.gate_leakage +
360         bank.mat.power_bit_mux_decoders.readOp.gate_leakage +
361         bank.mat.power_sa_mux_lev_1_decoders.readOp.gate_leakage +
362         bank.mat.power_sa_mux_lev_2_decoders.readOp.gate_leakage ) * dp.num_act_mats_hor_dir;
363    //bank.mat.leak_power_sense_amps_open_page_state) * dp.num_act_mats_hor_dir;
364
365    leak_power_request_and_reply_networks =
366        power_routing_to_bank.readOp.leakage +
367        bank.htree_in_add->power.readOp.leakage +
368        bank.htree_in_data->power.readOp.leakage +
369        bank.htree_out_data->power.readOp.leakage;
370
371    leak_power_request_and_reply_networks +=
372        power_routing_to_bank.readOp.gate_leakage +
373        bank.htree_in_add->power.readOp.gate_leakage +
374        bank.htree_in_data->power.readOp.gate_leakage +
375        bank.htree_out_data->power.readOp.gate_leakage;
376
377    if (dp.fully_assoc || dp.pure_cam) {
378        leak_power_request_and_reply_networks += htree_in_search->power.readOp.leakage + htree_out_search->power.readOp.leakage;
379        leak_power_request_and_reply_networks += htree_in_search->power.readOp.gate_leakage + htree_out_search->power.readOp.gate_leakage;
380    }
381
382
383    // if DRAM, add contribution of power spent in row predecoder drivers,
384    // blocks and decoders to refresh power
385    if (dp.is_dram) {
386        refresh_power  = (bank.mat.r_predec->power.readOp.dynamic * dp.num_act_mats_hor_dir +
387                          bank.mat.row_dec->power.readOp.dynamic) * dp.num_r_subarray * dp.num_subarrays;
388        refresh_power += bank.mat.per_bitline_read_energy * dp.num_c_subarray * dp.num_r_subarray * dp.num_subarrays;
389        refresh_power += bank.mat.power_bl_precharge_eq_drv.readOp.dynamic * dp.num_act_mats_hor_dir;
390        refresh_power += bank.mat.power_sa.readOp.dynamic * dp.num_act_mats_hor_dir;
391        refresh_power /= dp.dram_refresh_period;
392    }
393
394
395    if (dp.is_tag == false) {
396        power.readOp.dynamic  = dyn_read_energy_from_closed_page;
397        power.writeOp.dynamic = dyn_read_energy_from_closed_page
398                                - dyn_read_energy_remaining_words_in_burst
399                                - bank.mat.power_bitline.readOp.dynamic * dp.num_act_mats_hor_dir
400                                + bank.mat.power_bitline.writeOp.dynamic * dp.num_act_mats_hor_dir
401                                + (power_routing_to_bank.writeOp.dynamic -
402                                   power_routing_to_bank.readOp.dynamic -
403                                   bank.htree_out_data->power.readOp.dynamic +
404                                   bank.htree_in_data->power.readOp.dynamic) *
405                                (MAX((g_ip->burst_len / g_ip->int_prefetch_w), 1) - 1); //FIXME
406
407        if (dp.is_dram == false) {
408            power.writeOp.dynamic -= bank.mat.power_sa.readOp.dynamic * dp.num_act_mats_hor_dir;
409        }
410    }
411
412    // if DRAM, add refresh power to total leakage
413    if (dp.is_dram) {
414        power.readOp.leakage += refresh_power;
415    }
416
417    // TODO: below should be  avoided.
418    /*if (dp.is_main_mem)
419    {
420      power.readOp.leakage += MAIN_MEM_PER_CHIP_STANDBY_CURRENT_mA * 1e-3 * g_tp.peri_global.Vdd / g_ip->nbanks;
421    }*/
422
423    assert(power.readOp.dynamic  > 0);
424    assert(power.writeOp.dynamic > 0);
425    assert(power.readOp.leakage  > 0);
426}
427
428