1/*****************************************************************************
2 * McPAT
3 * SOFTWARE LICENSE AGREEMENT
4 * Copyright 2012 Hewlett-Packard Development Company, L.P.
5 * Copyright (c) 2010-2013 Advanced Micro Devices, Inc.
6 * All Rights Reserved
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met: redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer;
12 * redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the

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21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 ***************************************************************************/
32
33#include <algorithm>
34#include <cassert>
35#include <cmath>
36#include <iostream>
37#include <string>
38
39#include "basic_circuit.h"
40#include "common.h"
41#include "const.h"
42#include "io.h"
43#include "noc.h"
44#include "parameter.h"
45
46OnChipNetwork::OnChipNetwork(XMLNode* _xml_data, int ithNoC_,
47 InputParameter* interface_ip_)
48 : McPATComponent(_xml_data), router(NULL), link_bus(NULL), ithNoC(ithNoC_),
49 interface_ip(*interface_ip_), link_bus_exist(false),
50 router_exist(false) {
51 name = "On-Chip Network";
52 set_param_stats();
53 local_result = init_interface(&interface_ip, name);
54 scktRatio = g_tp.sckt_co_eff;
55
56 // TODO: Routers and links should be children of the NOC component
57 if (noc_params.type) {
58 init_router();
59 } else {
60 init_link_bus();
61 }
62}
63
64void OnChipNetwork::init_router() {
65 router = new Router(noc_params.flit_size,
66 noc_params.virtual_channel_per_port *
67 noc_params.input_buffer_entries_per_vc,
68 noc_params.virtual_channel_per_port,
69 &(g_tp.peri_global),
70 noc_params.input_ports, noc_params.output_ports,
71 noc_params.M_traffic_pattern);
72 // TODO: Make a router class within McPAT that descends from McPATComponent
73 // children.push_back(router);
74 area.set_area(area.get_area() + router->area.get_area() *
75 noc_params.total_nodes);
76
77 double long_channel_device_reduction = longer_channel_device_reduction(Uncore_device);
78 router->power.readOp.longer_channel_leakage = router->power.readOp.leakage * long_channel_device_reduction;
79 router->buffer.power.readOp.longer_channel_leakage = router->buffer.power.readOp.leakage * long_channel_device_reduction;
80 router->crossbar.power.readOp.longer_channel_leakage = router->crossbar.power.readOp.leakage * long_channel_device_reduction;
81 router->arbiter.power.readOp.longer_channel_leakage = router->arbiter.power.readOp.leakage * long_channel_device_reduction;
82 router_exist = true;
83}
84
85void OnChipNetwork::init_link_bus() {
86 if (noc_params.type) {
87 link_name = "Links";
88 } else {
89 link_name = "Bus";
90 }
91
92 interface_ip.throughput = noc_params.link_throughput /
93 noc_params.clockRate;
94 interface_ip.latency = noc_params.link_latency / noc_params.clockRate;
95
96 link_len /= (noc_params.horizontal_nodes + noc_params.vertical_nodes) / 2;
97
98 if (noc_params.total_nodes > 1) {
99 //All links are shared by neighbors
100 link_len /= 2;
101 }
102 link_bus = new Interconnect(xml_data, "Link", Uncore_device,
103 noc_params.link_base_width,
104 noc_params.link_base_height,
105 noc_params.flit_size, link_len, &interface_ip,
106 noc_params.link_start_wiring_level,
107 noc_params.clockRate, true/*pipelinable*/,
108 noc_params.route_over_perc);
109 children.push_back(link_bus);
110
111 link_bus_exist = true;
112}
113
114// TODO: This should use the McPATComponent::computeEnergy function to
115// recursively calculate energy of routers and links and then add
116void OnChipNetwork::computeEnergy() {
117 double pppm_t[4] = {1, 1, 1, 1};
118
119 // Initialize stats for TDP
120 tdp_stats.reset();
121 tdp_stats.readAc.access = noc_stats.duty_cycle;
122 if (router_exist) {
123 // TODO: Define a regression to exercise routers
124 // TODO: Clean this up: it is too invasive and breaks abstraction
125 set_pppm(pppm_t, 1 * tdp_stats.readAc.access, 1, 1, 1);
126 router->power = router->power * pppm_t;
127 set_pppm(pppm_t, noc_params.total_nodes,
128 noc_params.total_nodes,
129 noc_params.total_nodes,
130 noc_params.total_nodes);
131 }
132 if (link_bus_exist) {
133 if (noc_params.type) {
134 link_bus->int_params.active_ports = noc_params.min_ports - 1;
135 } else {
136 link_bus->int_params.active_ports = noc_params.min_ports;
137 }
138 link_bus->int_stats.duty_cycle =
139 noc_params.M_traffic_pattern * noc_stats.duty_cycle;
140
141 // TODO: Decide how to roll multiple routers into a single top-level
142 // NOC module. I would prefer not to, but it might be a nice feature
143 set_pppm(pppm_t, noc_params.total_nodes,
144 noc_params.total_nodes,
145 noc_params.total_nodes,
146 noc_params.total_nodes);
147 }
148
149 // Initialize stats for runtime energy and power
150 rtp_stats.reset();
151 rtp_stats.readAc.access = noc_stats.total_access;
152 set_pppm(pppm_t, 1, 0 , 0, 0);
153 if (router_exist) {
154 // TODO: Move this to a McPATComponent parent class of Router
155 router->buffer.rt_power.readOp.dynamic =
156 (router->buffer.power.readOp.dynamic +
157 router->buffer.power.writeOp.dynamic) * rtp_stats.readAc.access;
158 router->crossbar.rt_power.readOp.dynamic =
159 router->crossbar.power.readOp.dynamic * rtp_stats.readAc.access;
160 router->arbiter.rt_power.readOp.dynamic =
161 router->arbiter.power.readOp.dynamic * rtp_stats.readAc.access;
162
163 router->rt_power = router->rt_power +
164 (router->buffer.rt_power + router->crossbar.rt_power +
165 router->arbiter.rt_power) * pppm_t +
166 router->power * pppm_lkg;//TDP power must be calculated first!
167 }
168 if (link_bus_exist) {
169 link_bus->int_stats.accesses = noc_stats.total_access;
170 }
171
172 // Recursively compute energy
173 McPATComponent::computeEnergy();
174}
175
176void OnChipNetwork::set_param_stats() {
177 // TODO: Remove this or move initialization elsewhere
178 memset(&noc_params, 0, sizeof(OnChipNetworkParameters));
179
180 int num_children = xml_data->nChildNode("param");
181 int i;
182 int mat_type;
183 for (i = 0; i < num_children; i++) {
184 XMLNode* paramNode = xml_data->getChildNodePtr("param", &i);
185 XMLCSTR node_name = paramNode->getAttribute("name");
186 XMLCSTR value = paramNode->getAttribute("value");
187
188 if (!node_name)
189 warnMissingParamName(paramNode->getAttribute("id"));
190
191 ASSIGN_INT_IF("type", noc_params.type);
192 ASSIGN_FP_IF("clockrate", noc_params.clockRate);
193 ASSIGN_INT_IF("flit_bits", noc_params.flit_size);
194 ASSIGN_FP_IF("link_len", link_len);
195 ASSIGN_FP_IF("link_throughput", noc_params.link_throughput);
196 ASSIGN_FP_IF("link_latency", noc_params.link_latency);
197 ASSIGN_INT_IF("input_ports", noc_params.input_ports);
198 ASSIGN_INT_IF("output_ports", noc_params.output_ports);
199 ASSIGN_INT_IF("global_linked_ports", noc_params.global_linked_ports);
200 ASSIGN_INT_IF("horizontal_nodes", noc_params.horizontal_nodes);
201 ASSIGN_INT_IF("vertical_nodes", noc_params.vertical_nodes);
202 ASSIGN_FP_IF("chip_coverage", noc_params.chip_coverage);
203 ASSIGN_FP_IF("link_routing_over_percentage",
204 noc_params.route_over_perc);
205 ASSIGN_INT_IF("has_global_link", noc_params.has_global_link);
206 ASSIGN_INT_IF("virtual_channel_per_port",
207 noc_params.virtual_channel_per_port);
208 ASSIGN_INT_IF("input_buffer_entries_per_vc",
209 noc_params.input_buffer_entries_per_vc);
210 ASSIGN_FP_IF("M_traffic_pattern", noc_params.M_traffic_pattern);
211 ASSIGN_FP_IF("link_base_width", noc_params.link_base_width);
212 ASSIGN_FP_IF("link_base_height", noc_params.link_base_height);
213 ASSIGN_INT_IF("link_start_wiring_level",
214 noc_params.link_start_wiring_level);
215 ASSIGN_INT_IF("wire_mat_type", mat_type);
216 ASSIGN_ENUM_IF("wire_type", interface_ip.wt, Wire_type);
217
218 else {
219 warnUnrecognizedParam(node_name);
220 }
221 }
222
223 // Change from MHz to Hz
224 noc_params.clockRate *= 1e6;
225
226 interface_ip.wire_is_mat_type = mat_type;
227 interface_ip.wire_os_mat_type = mat_type;
228
229 num_children = xml_data->nChildNode("stat");
230 for (i = 0; i < num_children; i++) {
231 XMLNode* statNode = xml_data->getChildNodePtr("stat", &i);
232 XMLCSTR node_name = statNode->getAttribute("name");
233 XMLCSTR value = statNode->getAttribute("value");
234
235 if (!node_name)
236 warnMissingStatName(statNode->getAttribute("id"));
237
238 ASSIGN_FP_IF("duty_cycle", noc_stats.duty_cycle);
239 ASSIGN_FP_IF("total_accesses", noc_stats.total_access);
240
241 else {
242 warnUnrecognizedStat(node_name);
243 }
244 }
245
246 clockRate = noc_params.clockRate;
247 noc_params.min_ports =
248 min(noc_params.input_ports, noc_params.output_ports);
249 if (noc_params.type) {
250 noc_params.global_linked_ports = (noc_params.input_ports - 1) +
251 (noc_params.output_ports - 1);
252 }
253 noc_params.total_nodes =
254 noc_params.horizontal_nodes * noc_params.vertical_nodes;
255
256 assert(noc_params.chip_coverage <= 1);
257 assert(noc_params.route_over_perc <= 1);
258 assert(link_len > 0);
259}
260
261OnChipNetwork ::~OnChipNetwork() {
262
263 if (router) {
264 delete router;
265 router = 0;
266 }
267 if (link_bus) {
268 delete link_bus;
269 link_bus = 0;
270 }
271}