/***************************************************************************** * McPAT/CACTI * SOFTWARE LICENSE AGREEMENT * Copyright 2012 Hewlett-Packard Development Company, L.P. * Copyright (c) 2010-2013 Advanced Micro Devices, Inc. * 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 "router.h" Router::Router( double flit_size_, double vc_buf, /* vc size = vc_buffer_size * flit_size */ double vc_c, TechnologyParameter::DeviceType *dt, double I_, double O_, double M_ ): flit_size(flit_size_), deviceType(dt), I(I_), O(O_), M(M_) { vc_buffer_size = vc_buf; vc_count = vc_c; min_w_pmos = deviceType->n_to_p_eff_curr_drv_ratio * g_tp.min_w_nmos_; double technology = g_ip->F_sz_um; Vdd = dt->Vdd; /*Crossbar parameters. Transmisson gate is employed for connector*/ NTtr = 10 * technology * 1e-6 / 2; /*Transmission gate's nmos tr. length*/ PTtr = 20 * technology * 1e-6 / 2; /* pmos tr. length*/ wt = 15 * technology * 1e-6 / 2; /*track width*/ ht = 15 * technology * 1e-6 / 2; /*track height*/ // I = 5; /*Number of crossbar input ports*/ // O = 5; /*Number of crossbar output ports*/ NTi = 12.5 * technology * 1e-6 / 2; PTi = 25 * technology * 1e-6 / 2; NTid = 60 * technology * 1e-6 / 2; //m PTid = 120 * technology * 1e-6 / 2; // m NTod = 60 * technology * 1e-6 / 2; // m PTod = 120 * technology * 1e-6 / 2; // m calc_router_parameters(); } Router::~Router() {} double //wire cap with triple spacing Router::Cw3(double length) { Wire wc(g_ip->wt, length, 1, 3, 3); return (wc.wire_cap(length)); } /*Function to calculate the gate capacitance*/ double Router::gate_cap(double w) { return (double) gate_C (w*1e6 /*u*/, 0); } /*Function to calculate the diffusion capacitance*/ double Router::diff_cap(double w, int type /*0 for n-mos and 1 for p-mos*/, double s /*number of stacking transistors*/) { return (double) drain_C_(w*1e6 /*u*/, type, (int) s, 1, g_tp.cell_h_def); } /*crossbar related functions */ // Model for simple transmission gate double Router::transmission_buf_inpcap() { return diff_cap(NTtr, 0, 1) + diff_cap(PTtr, 1, 1); } double Router::transmission_buf_outcap() { return diff_cap(NTtr, 0, 1) + diff_cap(PTtr, 1, 1); } double Router::transmission_buf_ctrcap() { return gate_cap(NTtr) + gate_cap(PTtr); } double Router::crossbar_inpline() { return (Cw3(O*flit_size*wt) + O*transmission_buf_inpcap() + gate_cap(NTid) + gate_cap(PTid) + diff_cap(NTid, 0, 1) + diff_cap(PTid, 1, 1)); } double Router::crossbar_outline() { return (Cw3(I*flit_size*ht) + I*transmission_buf_outcap() + gate_cap(NTod) + gate_cap(PTod) + diff_cap(NTod, 0, 1) + diff_cap(PTod, 1, 1)); } double Router::crossbar_ctrline() { return (Cw3(0.5*O*flit_size*wt) + flit_size*transmission_buf_ctrcap() + diff_cap(NTi, 0, 1) + diff_cap(PTi, 1, 1) + gate_cap(NTi) + gate_cap(PTi)); } double Router::tr_crossbar_power() { return (crossbar_inpline()*Vdd*Vdd*flit_size / 2 + crossbar_outline()*Vdd*Vdd*flit_size / 2) * 2; } void Router::buffer_stats() { DynamicParameter dyn_p; dyn_p.is_tag = false; dyn_p.pure_cam = false; dyn_p.fully_assoc = false; dyn_p.pure_ram = true; dyn_p.is_dram = false; dyn_p.is_main_mem = false; dyn_p.num_subarrays = 1; dyn_p.num_mats = 1; dyn_p.Ndbl = 1; dyn_p.Ndwl = 1; dyn_p.Nspd = 1; dyn_p.deg_bl_muxing = 1; dyn_p.deg_senseamp_muxing_non_associativity = 1; dyn_p.Ndsam_lev_1 = 1; dyn_p.Ndsam_lev_2 = 1; dyn_p.Ndcm = 1; dyn_p.number_addr_bits_mat = 8; dyn_p.number_way_select_signals_mat = 1; dyn_p.number_subbanks_decode = 0; dyn_p.num_act_mats_hor_dir = 1; dyn_p.V_b_sense = Vdd; // FIXME check power calc. dyn_p.ram_cell_tech_type = 0; dyn_p.num_r_subarray = (int) vc_buffer_size; dyn_p.num_c_subarray = (int) flit_size * (int) vc_count; dyn_p.num_mats_h_dir = 1; dyn_p.num_mats_v_dir = 1; dyn_p.num_do_b_subbank = (int)flit_size; dyn_p.num_di_b_subbank = (int)flit_size; dyn_p.num_do_b_mat = (int) flit_size; dyn_p.num_di_b_mat = (int) flit_size; dyn_p.num_do_b_mat = (int) flit_size; dyn_p.num_di_b_mat = (int) flit_size; dyn_p.num_do_b_bank_per_port = (int) flit_size; dyn_p.num_di_b_bank_per_port = (int) flit_size; dyn_p.out_w = (int) flit_size; dyn_p.use_inp_params = 1; dyn_p.num_wr_ports = (unsigned int) vc_count; dyn_p.num_rd_ports = 1;//(unsigned int) vc_count;//based on Bill Dally's book dyn_p.num_rw_ports = 0; dyn_p.num_se_rd_ports = 0; dyn_p.num_search_ports = 0; dyn_p.cell.h = g_tp.sram.b_h + 2 * g_tp.wire_outside_mat.pitch * (dyn_p.num_wr_ports + dyn_p.num_rw_ports - 1 + dyn_p.num_rd_ports); dyn_p.cell.w = g_tp.sram.b_w + 2 * g_tp.wire_outside_mat.pitch * (dyn_p.num_rw_ports - 1 + (dyn_p.num_rd_ports - dyn_p.num_se_rd_ports) + dyn_p.num_wr_ports) + g_tp.wire_outside_mat.pitch * dyn_p.num_se_rd_ports; Mat buff(dyn_p); buff.compute_delays(0); buff.compute_power_energy(); buffer.power.readOp = buff.power.readOp; buffer.power.writeOp = buffer.power.readOp; //FIXME buffer.area = buff.area; } void Router::cb_stats () { if (1) { Crossbar c_b(I, O, flit_size); c_b.compute_power(); crossbar.delay = c_b.delay; crossbar.power.readOp.dynamic = c_b.power.readOp.dynamic; crossbar.power.readOp.leakage = c_b.power.readOp.leakage; crossbar.power.readOp.gate_leakage = c_b.power.readOp.gate_leakage; crossbar.area = c_b.area; // c_b.print_crossbar(); } else { crossbar.power.readOp.dynamic = tr_crossbar_power(); crossbar.power.readOp.leakage = flit_size * I * O * cmos_Isub_leakage(NTtr * g_tp.min_w_nmos_, PTtr * min_w_pmos, 1, tg); crossbar.power.readOp.gate_leakage = flit_size * I * O * cmos_Ig_leakage(NTtr * g_tp.min_w_nmos_, PTtr * min_w_pmos, 1, tg); } } void Router::get_router_power() { /* calculate buffer stats */ buffer_stats(); /* calculate cross-bar stats */ cb_stats(); /* calculate arbiter stats */ Arbiter vcarb(vc_count, flit_size, buffer.area.w); Arbiter cbarb(I, flit_size, crossbar.area.w); vcarb.compute_power(); cbarb.compute_power(); arbiter.power.readOp.dynamic = vcarb.power.readOp.dynamic * I + cbarb.power.readOp.dynamic * O; arbiter.power.readOp.leakage = vcarb.power.readOp.leakage * I + cbarb.power.readOp.leakage * O; arbiter.power.readOp.gate_leakage = vcarb.power.readOp.gate_leakage * I + cbarb.power.readOp.gate_leakage * O; // arb_stats(); power.readOp.dynamic = ((buffer.power.readOp.dynamic + buffer.power.writeOp.dynamic) + crossbar.power.readOp.dynamic + arbiter.power.readOp.dynamic) * MIN(I, O) * M; double pppm_t[4] = {1, I, I, 1}; power = power + (buffer.power * pppm_t + crossbar.power + arbiter.power) * pppm_lkg; } void Router::get_router_delay () { FREQUENCY = 5; // move this to config file --TODO cycle_time = (1 / (double)FREQUENCY) * 1e3; //ps delay = 4; max_cyc = 17 * g_tp.FO4; //s max_cyc *= 1e12; //ps if (cycle_time < max_cyc) { FREQUENCY = (1 / max_cyc) * 1e3; //GHz } } void Router::get_router_area() { area.h = I * buffer.area.h; area.w = buffer.area.w + crossbar.area.w; } void Router::calc_router_parameters() { /* calculate router frequency and pipeline cycles */ get_router_delay(); /* router power stats */ get_router_power(); /* area stats */ get_router_area(); } void Router::print_router() { cout << "\n\nRouter stats:\n"; cout << "\tRouter Area - " << area.get_area()*1e-6 << "(mm^2)\n"; cout << "\tMaximum possible network frequency - " << (1 / max_cyc)*1e3 << "GHz\n"; cout << "\tNetwork frequency - " << FREQUENCY << " GHz\n"; cout << "\tNo. of Virtual channels - " << vc_count << "\n"; cout << "\tNo. of pipeline stages - " << delay << endl; cout << "\tLink bandwidth - " << flit_size << " (bits)\n"; cout << "\tNo. of buffer entries per virtual channel - " << vc_buffer_size << "\n"; cout << "\tSimple buffer Area - " << buffer.area.get_area()*1e-6 << "(mm^2)\n"; cout << "\tSimple buffer access (Read) - " << buffer.power.readOp.dynamic * 1e9 << " (nJ)\n"; cout << "\tSimple buffer leakage - " << buffer.power.readOp.leakage * 1e3 << " (mW)\n"; cout << "\tCrossbar Area - " << crossbar.area.get_area()*1e-6 << "(mm^2)\n"; cout << "\tCross bar access energy - " << crossbar.power.readOp.dynamic * 1e9 << " (nJ)\n"; cout << "\tCross bar leakage power - " << crossbar.power.readOp.leakage * 1e3 << " (mW)\n"; cout << "\tArbiter access energy (VC arb + Crossbar arb) - " << arbiter.power.readOp.dynamic * 1e9 << " (nJ)\n"; cout << "\tArbiter leakage (VC arb + Crossbar arb) - " << arbiter.power.readOp.leakage * 1e3 << " (mW)\n"; }