SimpleNetwork.cc revision 11113:5a2e1b1b5c43 
1/*
2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <cassert>
30#include <numeric>
31
32#include "base/cast.hh"
33#include "base/stl_helpers.hh"
34#include "mem/ruby/common/NetDest.hh"
35#include "mem/ruby/network/MessageBuffer.hh"
36#include "mem/ruby/network/simple/SimpleLink.hh"
37#include "mem/ruby/network/simple/SimpleNetwork.hh"
38#include "mem/ruby/network/simple/Switch.hh"
39#include "mem/ruby/network/simple/Throttle.hh"
40#include "mem/ruby/profiler/Profiler.hh"
41#include "mem/ruby/system/RubySystem.hh"
42
43using namespace std;
44using m5::stl_helpers::deletePointers;
45
46SimpleNetwork::SimpleNetwork(const Params *p)
47    : Network(p)
48{
49    m_buffer_size = p->buffer_size;
50    m_endpoint_bandwidth = p->endpoint_bandwidth;
51    m_adaptive_routing = p->adaptive_routing;
52
53    // Note: the parent Network Object constructor is called before the
54    // SimpleNetwork child constructor.  Therefore, the member variables
55    // used below should already be initialized.
56    m_endpoint_switches.resize(m_nodes);
57
58    // record the routers
59    for (vector<BasicRouter*>::const_iterator i = p->routers.begin();
60         i != p->routers.end(); ++i) {
61        Switch* s = safe_cast<Switch*>(*i);
62        m_switches.push_back(s);
63        s->init_net_ptr(this);
64    }
65
66    m_int_link_buffers = p->int_link_buffers;
67    m_num_connected_buffers = 0;
68}
69
70void
71SimpleNetwork::init()
72{
73    Network::init();
74
75    // The topology pointer should have already been initialized in
76    // the parent class network constructor.
77    assert(m_topology_ptr != NULL);
78    m_topology_ptr->createLinks(this);
79}
80
81SimpleNetwork::~SimpleNetwork()
82{
83    deletePointers(m_switches);
84    deletePointers(m_int_link_buffers);
85}
86
87// From a switch to an endpoint node
88void
89SimpleNetwork::makeOutLink(SwitchID src, NodeID dest, BasicLink* link,
90                           LinkDirection direction,
91                           const NetDest& routing_table_entry)
92{
93    assert(dest < m_nodes);
94    assert(src < m_switches.size());
95    assert(m_switches[src] != NULL);
96
97    SimpleExtLink *simple_link = safe_cast<SimpleExtLink*>(link);
98
99    m_switches[src]->addOutPort(m_fromNetQueues[dest], routing_table_entry,
100                                simple_link->m_latency,
101                                simple_link->m_bw_multiplier);
102
103    m_endpoint_switches[dest] = m_switches[src];
104}
105
106// From an endpoint node to a switch
107void
108SimpleNetwork::makeInLink(NodeID src, SwitchID dest, BasicLink* link,
109                          LinkDirection direction,
110                          const NetDest& routing_table_entry)
111{
112    assert(src < m_nodes);
113    m_switches[dest]->addInPort(m_toNetQueues[src]);
114}
115
116// From a switch to a switch
117void
118SimpleNetwork::makeInternalLink(SwitchID src, SwitchID dest, BasicLink* link,
119                                LinkDirection direction,
120                                const NetDest& routing_table_entry)
121{
122    // Create a set of new MessageBuffers
123    std::vector<MessageBuffer*> queues(m_virtual_networks);
124
125    for (int i = 0; i < m_virtual_networks; i++) {
126        // allocate a buffer
127        assert(m_num_connected_buffers < m_int_link_buffers.size());
128        MessageBuffer* buffer_ptr = m_int_link_buffers[m_num_connected_buffers];
129        m_num_connected_buffers++;
130        queues[i] = buffer_ptr;
131    }
132
133    // Connect it to the two switches
134    SimpleIntLink *simple_link = safe_cast<SimpleIntLink*>(link);
135
136    m_switches[dest]->addInPort(queues);
137    m_switches[src]->addOutPort(queues, routing_table_entry,
138                                simple_link->m_latency,
139                                simple_link->m_bw_multiplier);
140}
141
142void
143SimpleNetwork::regStats()
144{
145    for (MessageSizeType type = MessageSizeType_FIRST;
146         type < MessageSizeType_NUM; ++type) {
147        m_msg_counts[(unsigned int) type]
148            .name(name() + ".msg_count." + MessageSizeType_to_string(type))
149            .flags(Stats::nozero)
150            ;
151        m_msg_bytes[(unsigned int) type]
152            .name(name() + ".msg_byte." + MessageSizeType_to_string(type))
153            .flags(Stats::nozero)
154            ;
155
156        // Now state what the formula is.
157        for (int i = 0; i < m_switches.size(); i++) {
158            m_msg_counts[(unsigned int) type] +=
159                sum(m_switches[i]->getMsgCount(type));
160        }
161
162        m_msg_bytes[(unsigned int) type] =
163            m_msg_counts[(unsigned int) type] * Stats::constant(
164                    Network::MessageSizeType_to_int(type));
165    }
166}
167
168void
169SimpleNetwork::collateStats()
170{
171    for (int i = 0; i < m_switches.size(); i++) {
172        m_switches[i]->collateStats();
173    }
174}
175
176void
177SimpleNetwork::print(ostream& out) const
178{
179    out << "[SimpleNetwork]";
180}
181
182SimpleNetwork *
183SimpleNetworkParams::create()
184{
185    return new SimpleNetwork(this);
186}
187
188/*
189 * The simple network has an array of switches. These switches have buffers
190 * that need to be accessed for functional reads and writes. Also the links
191 * between different switches have buffers that need to be accessed.
192 */
193bool
194SimpleNetwork::functionalRead(Packet *pkt)
195{
196    for (unsigned int i = 0; i < m_switches.size(); i++) {
197        if (m_switches[i]->functionalRead(pkt)) {
198            return true;
199        }
200    }
201
202    for (unsigned int i = 0; i < m_int_link_buffers.size(); ++i) {
203        if (m_int_link_buffers[i]->functionalRead(pkt)) {
204            return true;
205        }
206    }
207
208    return false;
209}
210
211uint32_t
212SimpleNetwork::functionalWrite(Packet *pkt)
213{
214    uint32_t num_functional_writes = 0;
215
216    for (unsigned int i = 0; i < m_switches.size(); i++) {
217        num_functional_writes += m_switches[i]->functionalWrite(pkt);
218    }
219
220    for (unsigned int i = 0; i < m_int_link_buffers.size(); ++i) {
221        num_functional_writes += m_int_link_buffers[i]->functionalWrite(pkt);
222    }
223    return num_functional_writes;
224}
225