diff options
| author | VijayKandiah <[email protected]> | 2021-10-17 02:18:10 -0500 |
|---|---|---|
| committer | VijayKandiah <[email protected]> | 2021-10-17 02:18:10 -0500 |
| commit | 84c6cf45131e42b1a724ebf7977987a9ddb70db9 (patch) | |
| tree | e82f15238e79a03f3cc2435d4f9bb48d5023e8ae /src/gpuwattch/cacti/crossbar.cc | |
| parent | 4a4fc87a2dcd95bfe298f2b3d18a9833a506e499 (diff) | |
AccelWattch dev Integration
Diffstat (limited to 'src/gpuwattch/cacti/crossbar.cc')
| -rw-r--r-- | src/gpuwattch/cacti/crossbar.cc | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/src/gpuwattch/cacti/crossbar.cc b/src/gpuwattch/cacti/crossbar.cc deleted file mode 100644 index d7386a8..0000000 --- a/src/gpuwattch/cacti/crossbar.cc +++ /dev/null @@ -1,161 +0,0 @@ -/***************************************************************************** - * 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 "crossbar.h" - -#define ASPECT_THRESHOLD .8 -#define ADJ 1 - -Crossbar::Crossbar( - double n_inp_, - double n_out_, - double flit_size_, - TechnologyParameter::DeviceType *dt - ):n_inp(n_inp_), n_out(n_out_), flit_size(flit_size_), deviceType(dt) -{ - min_w_pmos = deviceType->n_to_p_eff_curr_drv_ratio*g_tp.min_w_nmos_; - Vdd = dt->Vdd; - CB_ADJ = 1; -} - -Crossbar::~Crossbar(){} - -double Crossbar::output_buffer() -{ - - //Wire winit(4, 4); - double l_eff = n_inp*flit_size*g_tp.wire_outside_mat.pitch; - Wire w1(g_ip->wt, l_eff); - //double s1 = w1.repeater_size *l_eff*ADJ/w1.repeater_spacing; - double s1 = w1.repeater_size * (l_eff <w1.repeater_spacing? l_eff *ADJ/w1.repeater_spacing : ADJ); - double pton_size = deviceType->n_to_p_eff_curr_drv_ratio; - // the model assumes input capacitance of the wire driver = input capacitance of nand + nor = input cap of the driver transistor - TriS1 = s1*(1 + pton_size)/(2 + pton_size + 1 + 2*pton_size); - TriS2 = s1; //driver transistor - - if (TriS1 < 1) - TriS1 = 1; - - double input_cap = gate_C(TriS1*(2*min_w_pmos + g_tp.min_w_nmos_), 0) + - gate_C(TriS1*(min_w_pmos + 2*g_tp.min_w_nmos_), 0); -// input_cap += drain_C_(TriS1*g_tp.min_w_nmos_, NCH, 1, 1, g_tp.cell_h_def) + -// drain_C_(TriS1*min_w_pmos, PCH, 1, 1, g_tp.cell_h_def)*2 + -// gate_C(TriS2*g_tp.min_w_nmos_, 0)+ -// drain_C_(TriS1*min_w_pmos, NCH, 1, 1, g_tp.cell_h_def)*2 + -// drain_C_(TriS1*min_w_pmos, PCH, 1, 1, g_tp.cell_h_def) + -// gate_C(TriS2*min_w_pmos, 0); - tri_int_cap = drain_C_(TriS1*g_tp.min_w_nmos_, NCH, 1, 1, g_tp.cell_h_def) + - drain_C_(TriS1*min_w_pmos, PCH, 1, 1, g_tp.cell_h_def)*2 + - gate_C(TriS2*g_tp.min_w_nmos_, 0)+ - drain_C_(TriS1*min_w_pmos, NCH, 1, 1, g_tp.cell_h_def)*2 + - drain_C_(TriS1*min_w_pmos, PCH, 1, 1, g_tp.cell_h_def) + - gate_C(TriS2*min_w_pmos, 0); - double output_cap = drain_C_(TriS2*g_tp.min_w_nmos_, NCH, 1, 1, g_tp.cell_h_def) + - drain_C_(TriS2*min_w_pmos, PCH, 1, 1, g_tp.cell_h_def); - double ctr_cap = gate_C(TriS2 *(min_w_pmos + g_tp.min_w_nmos_), 0); - - tri_inp_cap = input_cap; - tri_out_cap = output_cap; - tri_ctr_cap = ctr_cap; - return input_cap + output_cap + ctr_cap; -} - -void Crossbar::compute_power() -{ - - Wire winit(4, 4); - double tri_cap = output_buffer(); - assert(tri_cap > 0); - //area of a tristate logic - double g_area = compute_gate_area(INV, 1, TriS2*g_tp.min_w_nmos_, TriS2*min_w_pmos, g_tp.cell_h_def); - g_area *= 2; // to model area of output transistors - g_area += compute_gate_area (NAND, 2, TriS1*2*g_tp.min_w_nmos_, TriS1*min_w_pmos, g_tp.cell_h_def); - g_area += compute_gate_area (NOR, 2, TriS1*g_tp.min_w_nmos_, TriS1*2*min_w_pmos, g_tp.cell_h_def); - double width /*per tristate*/ = g_area/(CB_ADJ * g_tp.cell_h_def); - // effective no. of tristate buffers that need to be laid side by side - int ntri = (int)ceil(g_tp.cell_h_def/(g_tp.wire_outside_mat.pitch)); - double wire_len = MAX(width*ntri*n_out, flit_size*g_tp.wire_outside_mat.pitch*n_out); - Wire w1(g_ip->wt, wire_len); - - area.w = wire_len; - area.h = g_tp.wire_outside_mat.pitch*n_inp*flit_size * CB_ADJ; - Wire w2(g_ip->wt, area.h); - - double aspect_ratio_cb = (area.h/area.w)*(n_out/n_inp); - if (aspect_ratio_cb > 1) aspect_ratio_cb = 1/aspect_ratio_cb; - - if (aspect_ratio_cb < ASPECT_THRESHOLD) { - if (n_out > 2 && n_inp > 2) { - CB_ADJ+=0.2; - //cout << "CB ADJ " << CB_ADJ << endl; - if (CB_ADJ < 4) { - this->compute_power(); - } - } - } - - - - power.readOp.dynamic = (w1.power.readOp.dynamic + w2.power.readOp.dynamic + (tri_inp_cap * n_out + tri_out_cap * n_inp + tri_ctr_cap + tri_int_cap) * Vdd*Vdd)*flit_size; - power.readOp.leakage = n_inp * n_out * flit_size * ( - cmos_Isub_leakage(g_tp.min_w_nmos_*TriS2*2, min_w_pmos*TriS2*2, 1, inv) *Vdd+ - cmos_Isub_leakage(g_tp.min_w_nmos_*TriS1*3, min_w_pmos*TriS1*3, 2, nand)*Vdd+ - cmos_Isub_leakage(g_tp.min_w_nmos_*TriS1*3, min_w_pmos*TriS1*3, 2, nor) *Vdd+ - w1.power.readOp.leakage + w2.power.readOp.leakage); - power.readOp.gate_leakage = n_inp * n_out * flit_size * ( - cmos_Ig_leakage(g_tp.min_w_nmos_*TriS2*2, min_w_pmos*TriS2*2, 1, inv) *Vdd+ - cmos_Ig_leakage(g_tp.min_w_nmos_*TriS1*3, min_w_pmos*TriS1*3, 2, nand)*Vdd+ - cmos_Ig_leakage(g_tp.min_w_nmos_*TriS1*3, min_w_pmos*TriS1*3, 2, nor) *Vdd+ - w1.power.readOp.gate_leakage + w2.power.readOp.gate_leakage); - - // delay calculation - double l_eff = n_inp*flit_size*g_tp.wire_outside_mat.pitch; - Wire wdriver(g_ip->wt, l_eff); - double res = g_tp.wire_outside_mat.R_per_um * (area.w+area.h) + tr_R_on(g_tp.min_w_nmos_*wdriver.repeater_size, NCH, 1); - double cap = g_tp.wire_outside_mat.C_per_um * (area.w + area.h) + n_out*tri_inp_cap + n_inp*tri_out_cap; - delay = horowitz(w1.signal_rise_time(), res*cap, deviceType->Vth/deviceType->Vdd, deviceType->Vth/deviceType->Vdd, RISE); - - Wire wreset(); -} - -void Crossbar::print_crossbar() -{ - cout << "\nCrossbar Stats (" << n_inp << "x" << n_out << ")\n\n"; - cout << "Flit size : " << flit_size << " bits" << endl; - cout << "Width : " << area.w << " u" << endl; - cout << "Height : " << area.h << " u" << endl; - cout << "Dynamic Power : " << power.readOp.dynamic*1e9 * MIN(n_inp, n_out) << " (nJ)" << endl; - cout << "Leakage Power : " << power.readOp.leakage*1e3 << " (mW)" << endl; - cout << "Gate Leakage Power : " << power.readOp.gate_leakage*1e3 << " (mW)" << endl; - cout << "Crossbar Delay : " << delay*1e12 << " ps\n"; -} - - |
