xref: /gem5/ext/mcpat/noc.cc

/*****************************************************************************
 *                                McPAT
 *                      SOFTWARE LICENSE AGREEMENT
 *            Copyright 2012 Hewlett-Packard Development Company, L.P.
 *                          All Rights Reserved
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 * notice, this list of conditions and the following disclaimer;
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 * 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,
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 ***************************************************************************/

#include <algorithm>
#include <cassert>
#include <cmath>
#include <iostream>
#include <string>

#include "XML_Parse.h"
#include "basic_circuit.h"
#include "const.h"
#include "io.h"
#include "noc.h"
#include "parameter.h"

NoC::NoC(ParseXML *XML_interface, int ithNoC_, InputParameter* interface_ip_, double M_traffic_pattern_, double link_len_)
:XML(XML_interface),
ithNoC(ithNoC_),
interface_ip(*interface_ip_),
router(0),
link_bus(0),
link_bus_exist(false),
router_exist(false),
M_traffic_pattern(M_traffic_pattern_)
{
        /*
         * initialize, compute and optimize individual components.
         */

        if (XML->sys.Embedded)
                        {
                        interface_ip.wt                  =Global_30;
                        interface_ip.wire_is_mat_type = 0;
                        interface_ip.wire_os_mat_type = 1;
                        }
                else
                        {
                        interface_ip.wt                  =Global;
                        interface_ip.wire_is_mat_type = 2;
                        interface_ip.wire_os_mat_type = 2;
                        }
        set_noc_param();
        local_result=init_interface(&interface_ip);
        scktRatio = g_tp.sckt_co_eff;

        if (nocdynp.type)
        {/*
                 * if NOC compute router, router links must be computed separately
                 * and called from external
                 * since total chip area must be known first
                 */
                init_router();
        }
        else
        {
                init_link_bus(link_len_); //if bus compute bus
        }

        //  //clock power
        //  clockNetwork.init_wire_external(is_default, &interface_ip);
        //  clockNetwork.clk_area           =area*1.1;//10% of placement overhead. rule of thumb
        //  clockNetwork.end_wiring_level   =5;//toplevel metal
        //  clockNetwork.start_wiring_level =5;//toplevel metal
        //  clockNetwork.num_regs           = corepipe.tot_stage_vector;
        //  clockNetwork.optimize_wire();
}

void NoC::init_router()
{
        router  = new Router(nocdynp.flit_size,
                        nocdynp.virtual_channel_per_port*nocdynp.input_buffer_entries_per_vc,
                        nocdynp.virtual_channel_per_port, &(g_tp.peri_global),
                        nocdynp.input_ports,nocdynp.output_ports, M_traffic_pattern);
        //router->print_router();
        area.set_area(area.get_area()+ router->area.get_area()*nocdynp.total_nodes);

        double long_channel_device_reduction = longer_channel_device_reduction(Uncore_device);
        router->power.readOp.longer_channel_leakage          = router->power.readOp.leakage * long_channel_device_reduction;
        router->buffer.power.readOp.longer_channel_leakage   = router->buffer.power.readOp.leakage * long_channel_device_reduction;
        router->crossbar.power.readOp.longer_channel_leakage = router->crossbar.power.readOp.leakage * long_channel_device_reduction;
        router->arbiter.power.readOp.longer_channel_leakage  = router->arbiter.power.readOp.leakage * long_channel_device_reduction;
        router_exist = true;
}

void NoC ::init_link_bus(double link_len_)
{


//	if (nocdynp.min_ports==1 )
        if (nocdynp.type)
                link_name = "Links";
        else
                link_name = "Bus";

        link_len=link_len_;
        assert(link_len>0);

        interface_ip.throughput = nocdynp.link_throughput/nocdynp.clockRate;
        interface_ip.latency = nocdynp.link_latency/nocdynp.clockRate;

        link_len /= (nocdynp.horizontal_nodes + nocdynp.vertical_nodes)/2;

        if (nocdynp.total_nodes >1) link_len /=2; //All links are shared by neighbors
        link_bus = new interconnect(name, Uncore_device, 1, 1, nocdynp.flit_size,
                                  link_len, &interface_ip, 3, true/*pipelinable*/, nocdynp.route_over_perc);

        link_bus_tot_per_Router.area.set_area(link_bus_tot_per_Router.area.get_area()+ link_bus->area.get_area()
                        * nocdynp.global_linked_ports);

        area.set_area(area.get_area()+ link_bus_tot_per_Router.area.get_area()* nocdynp.total_nodes);
        link_bus_exist = true;
}
void NoC::computeEnergy(bool is_tdp)
{
        //power_point_product_masks
        double pppm_t[4]    = {1,1,1,1};
        double M=nocdynp.duty_cycle;
        if (is_tdp)
            {
                //init stats for TDP
                stats_t.readAc.access  = M;
            tdp_stats = stats_t;
            if (router_exist)
            {
                set_pppm(pppm_t, 1*M, 1, 1, 1);//reset traffic pattern
                router->power = router->power*pppm_t;
                set_pppm(pppm_t, nocdynp.total_nodes, nocdynp.total_nodes, nocdynp.total_nodes, nocdynp.total_nodes);
                    power     = power + router->power*pppm_t;
            }
            if (link_bus_exist)
            {
                if (nocdynp.type)
                        set_pppm(pppm_t, 1*M_traffic_pattern*M*(nocdynp.min_ports -1), nocdynp.global_linked_ports,
                                nocdynp.global_linked_ports, nocdynp.global_linked_ports);
                    //reset traffic pattern; local port do not have router links
                else
                        set_pppm(pppm_t, 1*M_traffic_pattern*M*(nocdynp.min_ports), nocdynp.global_linked_ports,
                                                        nocdynp.global_linked_ports, nocdynp.global_linked_ports);//reset traffic pattern

                link_bus_tot_per_Router.power = link_bus->power*pppm_t;

                set_pppm(pppm_t, nocdynp.total_nodes,
                                         nocdynp.total_nodes,
                                         nocdynp.total_nodes,
                                         nocdynp.total_nodes);
                power     = power + link_bus_tot_per_Router.power*pppm_t;

            }
            }
            else
            {
                //init stats for runtime power (RTP)
                stats_t.readAc.access  = XML->sys.NoC[ithNoC].total_accesses;
            rtp_stats = stats_t;
                set_pppm(pppm_t, 1, 0 , 0, 0);
                if (router_exist)
                {
                router->buffer.rt_power.readOp.dynamic = (router->buffer.power.readOp.dynamic + router->buffer.power.writeOp.dynamic)*rtp_stats.readAc.access ;
                router->crossbar.rt_power.readOp.dynamic = router->crossbar.power.readOp.dynamic*rtp_stats.readAc.access ;
                router->arbiter.rt_power.readOp.dynamic = router->arbiter.power.readOp.dynamic*rtp_stats.readAc.access ;

                        router->rt_power = router->rt_power + (router->buffer.rt_power + router->crossbar.rt_power + router->arbiter.rt_power)*pppm_t +
                                        router->power*pppm_lkg;//TDP power must be calculated first!
                        rt_power     = rt_power + router->rt_power;
                }
                if (link_bus_exist)
                {
                        set_pppm(pppm_t, rtp_stats.readAc.access, 1 , 1, rtp_stats.readAc.access);
                        link_bus->rt_power = link_bus->power * pppm_t;
                        rt_power = rt_power + link_bus->rt_power;
                }

            }
}


void NoC::displayEnergy(uint32_t indent,int plevel,bool is_tdp)
{
        string indent_str(indent, ' ');
        string indent_str_next(indent+2, ' ');
        bool long_channel = XML->sys.longer_channel_device;

        double M =M_traffic_pattern*nocdynp.duty_cycle;
        /*only router as a whole has been applied the M_traffic_pattern(0.6 by default) factor in router.cc;
         * 	When power of crossbars, arbiters, etc need to be displayed, the M_traffic_pattern factor need to
         * be applied together with McPAT's extra traffic pattern.
         * */
        if (is_tdp)
        {
                cout << name << endl;
                cout << indent_str << "Area = " << area.get_area()*1e-6<< " mm^2" << endl;
                cout << indent_str<< "Peak Dynamic = " << power.readOp.dynamic*nocdynp.clockRate << " W" << endl;
                cout << indent_str << "Subthreshold Leakage = "
                        << (long_channel? power.readOp.longer_channel_leakage:power.readOp.leakage) <<" W" << endl;
                cout << indent_str << "Gate Leakage = " << power.readOp.gate_leakage << " W" << endl;
                cout << indent_str<< "Runtime Dynamic = " << rt_power.readOp.dynamic/nocdynp.executionTime << " W" << endl;
                cout<<endl;

                if (router_exist)
                {
                        cout << indent_str << "Router: " << endl;
                        cout << indent_str_next << "Area = " << router->area.get_area()*1e-6<< " mm^2" << endl;
                        cout << indent_str_next<< "Peak Dynamic = " << router->power.readOp.dynamic*nocdynp.clockRate << " W" << endl;
                        cout << indent_str_next << "Subthreshold Leakage = "
                        << (long_channel? router->power.readOp.longer_channel_leakage:router->power.readOp.leakage)  <<" W" << endl;
                        cout << indent_str_next << "Gate Leakage = " << router->power.readOp.gate_leakage << " W" << endl;
                        cout << indent_str_next<< "Runtime Dynamic = " << router->rt_power.readOp.dynamic/nocdynp.executionTime << " W" << endl;
                        cout<<endl;
                        if (plevel >2){
                                cout << indent_str<< indent_str << "Virtual Channel Buffer:" << endl;
                                cout << indent_str<< indent_str_next << "Area = " << router->buffer.area.get_area()*1e-6*nocdynp.input_ports<< " mm^2" << endl;
                                cout << indent_str<< indent_str_next << "Peak Dynamic = " <<(router->buffer.power.readOp.dynamic + router->buffer.power.writeOp.dynamic)
                                *nocdynp.min_ports*M*nocdynp.clockRate << " W" << endl;
                                cout << indent_str<< indent_str_next << "Subthreshold Leakage = "
                                << (long_channel? router->buffer.power.readOp.longer_channel_leakage*nocdynp.input_ports:router->buffer.power.readOp.leakage*nocdynp.input_ports)  <<" W" << endl;
                                cout << indent_str<< indent_str_next << "Gate Leakage = " << router->buffer.power.readOp.gate_leakage*nocdynp.input_ports << " W" << endl;
                                cout << indent_str<< indent_str_next << "Runtime Dynamic = " << router->buffer.rt_power.readOp.dynamic/nocdynp.executionTime << " W" << endl;
                                cout <<endl;
                                cout << indent_str<< indent_str<< "Crossbar:" << endl;
                                cout << indent_str<< indent_str_next << "Area = " << router->crossbar.area.get_area()*1e-6  << " mm^2" << endl;
                                cout << indent_str<< indent_str_next << "Peak Dynamic = " << router->crossbar.power.readOp.dynamic*nocdynp.clockRate*nocdynp.min_ports*M << " W" << endl;
                                cout << indent_str<< indent_str_next << "Subthreshold Leakage = "
                                << (long_channel? router->crossbar.power.readOp.longer_channel_leakage:router->crossbar.power.readOp.leakage)  << " W" << endl;
                                cout << indent_str<< indent_str_next << "Gate Leakage = " << router->crossbar.power.readOp.gate_leakage  << " W" << endl;
                                cout << indent_str<< indent_str_next << "Runtime Dynamic = " << router->crossbar.rt_power.readOp.dynamic/nocdynp.executionTime << " W" << endl;
                                cout <<endl;
                                cout << indent_str<< indent_str<< "Arbiter:" << endl;
                                cout << indent_str<< indent_str_next << "Peak Dynamic = " << router->arbiter.power.readOp.dynamic*nocdynp.clockRate*nocdynp.min_ports*M  << " W" << endl;
                                cout << indent_str<< indent_str_next << "Subthreshold Leakage = "
                                << (long_channel? router->arbiter.power.readOp.longer_channel_leakage:router->arbiter.power.readOp.leakage)  << " W" << endl;
                                cout << indent_str<< indent_str_next << "Gate Leakage = " << router->arbiter.power.readOp.gate_leakage  << " W" << endl;
                                cout << indent_str<< indent_str_next << "Runtime Dynamic = " << router->arbiter.rt_power.readOp.dynamic/nocdynp.executionTime << " W" << endl;
                                cout <<endl;
                        }
                }
                if (link_bus_exist)
                {
                        cout << indent_str << (nocdynp.type? "Per Router ":"") << link_name<<": " << endl;
                        cout << indent_str_next << "Area = " << link_bus_tot_per_Router.area.get_area()*1e-6<< " mm^2" << endl;
                        cout << indent_str_next<< "Peak Dynamic = " << link_bus_tot_per_Router.power.readOp.dynamic*
                                nocdynp.clockRate << " W" << endl;
                        cout << indent_str_next << "Subthreshold Leakage = "
                        << (long_channel? link_bus_tot_per_Router.power.readOp.longer_channel_leakage:link_bus_tot_per_Router.power.readOp.leakage)
                             <<" W" << endl;
                        cout << indent_str_next << "Gate Leakage = " << link_bus_tot_per_Router.power.readOp.gate_leakage
                                << " W" << endl;
                        cout << indent_str_next<< "Runtime Dynamic = " << link_bus->rt_power.readOp.dynamic/nocdynp.executionTime << " W" << endl;
                        cout<<endl;

                }
        }
        else
        {
//		cout << indent_str_next << "Instruction Fetch Unit    Peak Dynamic = " << ifu->rt_power.readOp.dynamic*clockRate << " W" << endl;
//		cout << indent_str_next << "Instruction Fetch Unit    Subthreshold Leakage = " << ifu->rt_power.readOp.leakage <<" W" << endl;
//		cout << indent_str_next << "Instruction Fetch Unit    Gate Leakage = " << ifu->rt_power.readOp.gate_leakage << " W" << endl;
//		cout << indent_str_next << "Load Store Unit   Peak Dynamic = " << lsu->rt_power.readOp.dynamic*clockRate  << " W" << endl;
//		cout << indent_str_next << "Load Store Unit   Subthreshold Leakage = " << lsu->rt_power.readOp.leakage  << " W" << endl;
//		cout << indent_str_next << "Load Store Unit   Gate Leakage = " << lsu->rt_power.readOp.gate_leakage  << " W" << endl;
//		cout << indent_str_next << "Memory Management Unit   Peak Dynamic = " << mmu->rt_power.readOp.dynamic*clockRate  << " W" << endl;
//		cout << indent_str_next << "Memory Management Unit   Subthreshold Leakage = " << mmu->rt_power.readOp.leakage  << " W" << endl;
//		cout << indent_str_next << "Memory Management Unit   Gate Leakage = " << mmu->rt_power.readOp.gate_leakage  << " W" << endl;
//		cout << indent_str_next << "Execution Unit   Peak Dynamic = " << exu->rt_power.readOp.dynamic*clockRate  << " W" << endl;
//		cout << indent_str_next << "Execution Unit   Subthreshold Leakage = " << exu->rt_power.readOp.leakage  << " W" << endl;
//		cout << indent_str_next << "Execution Unit   Gate Leakage = " << exu->rt_power.readOp.gate_leakage  << " W" << endl;
        }
}

void NoC::set_noc_param()
{

        nocdynp.type            = XML->sys.NoC[ithNoC].type;
        nocdynp.clockRate       =XML->sys.NoC[ithNoC].clockrate;
        nocdynp.clockRate       *= 1e6;
        nocdynp.executionTime   = XML->sys.total_cycles/(XML->sys.target_core_clockrate*1e6);

        nocdynp.flit_size     = XML->sys.NoC[ithNoC].flit_bits;
        if (nocdynp.type)
        {
                nocdynp.input_ports   = XML->sys.NoC[ithNoC].input_ports;
                nocdynp.output_ports  = XML->sys.NoC[ithNoC].output_ports;//later minus 1
                nocdynp.min_ports     = min(nocdynp.input_ports,nocdynp.output_ports);
                nocdynp.global_linked_ports = (nocdynp.input_ports-1) + (nocdynp.output_ports-1);
                /*
                 * 	Except local i/o ports, all ports needs links( global_linked_ports);
                 *  However only min_ports can be fully active simultaneously
                 *  since the fewer number of ports (input or output ) is the bottleneck.
                 */
        }
        else
        {
                nocdynp.input_ports   = 1;
                nocdynp.output_ports  = 1;
                nocdynp.min_ports     = min(nocdynp.input_ports,nocdynp.output_ports);
                nocdynp.global_linked_ports = 1;
        }

        nocdynp.virtual_channel_per_port     = XML->sys.NoC[ithNoC].virtual_channel_per_port;
        nocdynp.input_buffer_entries_per_vc  = XML->sys.NoC[ithNoC].input_buffer_entries_per_vc;

        nocdynp.horizontal_nodes  = XML->sys.NoC[ithNoC].horizontal_nodes;
        nocdynp.vertical_nodes    = XML->sys.NoC[ithNoC].vertical_nodes;
        nocdynp.total_nodes       = nocdynp.horizontal_nodes*nocdynp.vertical_nodes;
        nocdynp.duty_cycle        = XML->sys.NoC[ithNoC].duty_cycle;
        nocdynp.has_global_link   = XML->sys.NoC[ithNoC].has_global_link;
        nocdynp.link_throughput   = XML->sys.NoC[ithNoC].link_throughput;
        nocdynp.link_latency      = XML->sys.NoC[ithNoC].link_latency;
        nocdynp.chip_coverage     = XML->sys.NoC[ithNoC].chip_coverage;
        nocdynp.route_over_perc   = XML->sys.NoC[ithNoC].route_over_perc;

        assert (nocdynp.chip_coverage <=1);
        assert (nocdynp.route_over_perc <=1);

        if (nocdynp.type)
                name = "NOC";
        else
                name = "BUSES";

}


NoC ::~NoC(){

        if(router) 	               {delete router; router = 0;}
        if(link_bus) 	           {delete link_bus; link_bus = 0;}
}