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Diffstat (limited to 'ext/mcpat/cacti/router.cc')
| -rw-r--r-- | ext/mcpat/cacti/router.cc | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/ext/mcpat/cacti/router.cc b/ext/mcpat/cacti/router.cc new file mode 100644 index 000000000..06f170691 --- /dev/null +++ b/ext/mcpat/cacti/router.cc @@ -0,0 +1,311 @@ +/***************************************************************************** + * 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 "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"; + +} + |