Switch.cc revision 7055:4e24742201d7 
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 "mem/protocol/MessageSizeType.hh"
30#include "mem/protocol/Protocol.hh"
31#include "mem/ruby/buffers/MessageBuffer.hh"
32#include "mem/ruby/network/Network.hh"
33#include "mem/ruby/network/simple/PerfectSwitch.hh"
34#include "mem/ruby/network/simple/Switch.hh"
35#include "mem/ruby/network/simple/Throttle.hh"
36
37using namespace std;
38
39Switch::Switch(SwitchID sid, SimpleNetwork* network_ptr)
40{
41    m_perfect_switch_ptr = new PerfectSwitch(sid, network_ptr);
42    m_switch_id = sid;
43    m_throttles.setSize(0);
44}
45
46Switch::~Switch()
47{
48    delete m_perfect_switch_ptr;
49
50    // Delete throttles (one per output port)
51    m_throttles.deletePointers();
52
53    // Delete MessageBuffers
54    m_buffers_to_free.deletePointers();
55}
56
57void
58Switch::addInPort(const Vector<MessageBuffer*>& in)
59{
60    m_perfect_switch_ptr->addInPort(in);
61}
62
63void
64Switch::addOutPort(const Vector<MessageBuffer*>& out,
65    const NetDest& routing_table_entry, int link_latency, int bw_multiplier)
66{
67    Throttle* throttle_ptr = NULL;
68
69    // Create a throttle
70    throttle_ptr = new Throttle(m_switch_id, m_throttles.size(), link_latency,
71        bw_multiplier);
72    m_throttles.insertAtBottom(throttle_ptr);
73
74    // Create one buffer per vnet (these are intermediaryQueues)
75    Vector<MessageBuffer*> intermediateBuffers;
76    for (int i = 0; i < out.size(); i++) {
77        MessageBuffer* buffer_ptr = new MessageBuffer;
78        // Make these queues ordered
79        buffer_ptr->setOrdering(true);
80        Network* net_ptr = RubySystem::getNetwork();
81        if (net_ptr->getBufferSize() > 0) {
82            buffer_ptr->setSize(net_ptr->getBufferSize());
83        }
84        intermediateBuffers.insertAtBottom(buffer_ptr);
85        m_buffers_to_free.insertAtBottom(buffer_ptr);
86  }
87
88    // Hook the queues to the PerfectSwitch
89    m_perfect_switch_ptr->addOutPort(intermediateBuffers, routing_table_entry);
90
91    // Hook the queues to the Throttle
92    throttle_ptr->addLinks(intermediateBuffers, out);
93}
94
95void
96Switch::clearRoutingTables()
97{
98    m_perfect_switch_ptr->clearRoutingTables();
99}
100
101void
102Switch::clearBuffers()
103{
104    m_perfect_switch_ptr->clearBuffers();
105    for (int i = 0; i < m_throttles.size(); i++) {
106        if (m_throttles[i] != NULL) {
107            m_throttles[i]->clear();
108        }
109    }
110}
111
112void
113Switch::reconfigureOutPort(const NetDest& routing_table_entry)
114{
115    m_perfect_switch_ptr->reconfigureOutPort(routing_table_entry);
116}
117
118const Throttle*
119Switch::getThrottle(LinkID link_number) const
120{
121    assert(m_throttles[link_number] != NULL);
122    return m_throttles[link_number];
123}
124
125const Vector<Throttle*>*
126Switch::getThrottles() const
127{
128    return &m_throttles;
129}
130
131void
132Switch::printStats(std::ostream& out) const
133{
134    ccprintf(out, "switch_%d_inlinks: %d\n", m_switch_id,
135        m_perfect_switch_ptr->getInLinks());
136    ccprintf(out, "switch_%d_outlinks: %d\n", m_switch_id,
137        m_perfect_switch_ptr->getOutLinks());
138
139    // Average link utilizations
140    double average_utilization = 0.0;
141    int throttle_count = 0;
142
143    for (int i = 0; i < m_throttles.size(); i++) {
144        Throttle* throttle_ptr = m_throttles[i];
145        if (throttle_ptr) {
146            average_utilization += throttle_ptr->getUtilization();
147            throttle_count++;
148        }
149    }
150    average_utilization =
151        throttle_count == 0 ? 0 : average_utilization / throttle_count;
152
153    // Individual link utilizations
154    out << "links_utilized_percent_switch_" << m_switch_id << ": "
155        << average_utilization << endl;
156
157    for (int link = 0; link < m_throttles.size(); link++) {
158        Throttle* throttle_ptr = m_throttles[link];
159        if (throttle_ptr != NULL) {
160            out << "  links_utilized_percent_switch_" << m_switch_id
161                << "_link_" << link << ": "
162                << throttle_ptr->getUtilization() << " bw: "
163                << throttle_ptr->getLinkBandwidth()
164                << " base_latency: " << throttle_ptr->getLatency() << endl;
165        }
166    }
167    out << endl;
168
169    // Traffic breakdown
170    for (int link = 0; link < m_throttles.size(); link++) {
171        Throttle* throttle_ptr = m_throttles[link];
172        if (!throttle_ptr)
173            continue;
174
175        const Vector<Vector<int> >& message_counts =
176            throttle_ptr->getCounters();
177        for (int int_type = 0; int_type < MessageSizeType_NUM; int_type++) {
178            MessageSizeType type = MessageSizeType(int_type);
179            int sum = message_counts[type].sum();
180            if (sum == 0)
181                continue;
182
183            out << "  outgoing_messages_switch_" << m_switch_id
184                << "_link_" << link << "_" << type << ": " << sum << " "
185                << sum * RubySystem::getNetwork()->MessageSizeType_to_int(type)
186                << " " << message_counts[type] << " base_latency: "
187                << throttle_ptr->getLatency() << endl;
188        }
189    }
190    out << endl;
191}
192
193void
194Switch::clearStats()
195{
196    m_perfect_switch_ptr->clearStats();
197    for (int i = 0; i < m_throttles.size(); i++) {
198        if (m_throttles[i] != NULL)
199            m_throttles[i]->clearStats();
200    }
201}
202
203void
204Switch::printConfig(std::ostream& out) const
205{
206    m_perfect_switch_ptr->printConfig(out);
207    for (int i = 0; i < m_throttles.size(); i++) {
208        if (m_throttles[i] != NULL)
209            m_throttles[i]->printConfig(out);
210    }
211}
212
213void
214Switch::print(std::ostream& out) const
215{
216    // FIXME printing
217    out << "[Switch]";
218}
219
220