Switch.cc revision 8645:89929730804b 
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 <numeric>
30
31#include "base/cast.hh"
32#include "base/stl_helpers.hh"
33#include "mem/protocol/MessageSizeType.hh"
34#include "mem/ruby/buffers/MessageBuffer.hh"
35#include "mem/ruby/network/simple/PerfectSwitch.hh"
36#include "mem/ruby/network/simple/SimpleNetwork.hh"
37#include "mem/ruby/network/simple/Switch.hh"
38#include "mem/ruby/network/simple/Throttle.hh"
39
40using namespace std;
41using m5::stl_helpers::deletePointers;
42using m5::stl_helpers::operator<<;
43
44Switch::Switch(SwitchID sid, SimpleNetwork* network_ptr)
45{
46    m_perfect_switch_ptr = new PerfectSwitch(sid, network_ptr);
47    m_switch_id = sid;
48}
49
50Switch::~Switch()
51{
52    delete m_perfect_switch_ptr;
53
54    // Delete throttles (one per output port)
55    deletePointers(m_throttles);
56
57    // Delete MessageBuffers
58    deletePointers(m_buffers_to_free);
59}
60
61void
62Switch::addInPort(const vector<MessageBuffer*>& in)
63{
64    m_perfect_switch_ptr->addInPort(in);
65}
66
67void
68Switch::addOutPort(const vector<MessageBuffer*>& out,
69    const NetDest& routing_table_entry, int link_latency, int bw_multiplier)
70{
71    Throttle* throttle_ptr = NULL;
72    SimpleNetwork* net_ptr =
73        safe_cast<SimpleNetwork*>(RubySystem::getNetwork());
74
75    // Create a throttle
76    throttle_ptr = new Throttle(m_switch_id, m_throttles.size(), link_latency,
77                                bw_multiplier, net_ptr->getEndpointBandwidth());
78    m_throttles.push_back(throttle_ptr);
79
80    // Create one buffer per vnet (these are intermediaryQueues)
81    vector<MessageBuffer*> intermediateBuffers;
82    for (int i = 0; i < out.size(); i++) {
83        MessageBuffer* buffer_ptr = new MessageBuffer;
84        // Make these queues ordered
85        buffer_ptr->setOrdering(true);
86        if (net_ptr->getBufferSize() > 0) {
87            buffer_ptr->resize(net_ptr->getBufferSize());
88        }
89        intermediateBuffers.push_back(buffer_ptr);
90        m_buffers_to_free.push_back(buffer_ptr);
91  }
92
93    // Hook the queues to the PerfectSwitch
94    m_perfect_switch_ptr->addOutPort(intermediateBuffers, routing_table_entry);
95
96    // Hook the queues to the Throttle
97    throttle_ptr->addLinks(intermediateBuffers, out);
98}
99
100void
101Switch::clearRoutingTables()
102{
103    m_perfect_switch_ptr->clearRoutingTables();
104}
105
106void
107Switch::clearBuffers()
108{
109    m_perfect_switch_ptr->clearBuffers();
110    for (int i = 0; i < m_throttles.size(); i++) {
111        if (m_throttles[i] != NULL) {
112            m_throttles[i]->clear();
113        }
114    }
115}
116
117void
118Switch::reconfigureOutPort(const NetDest& routing_table_entry)
119{
120    m_perfect_switch_ptr->reconfigureOutPort(routing_table_entry);
121}
122
123const Throttle*
124Switch::getThrottle(LinkID link_number) const
125{
126    assert(m_throttles[link_number] != NULL);
127    return m_throttles[link_number];
128}
129
130const vector<Throttle*>*
131Switch::getThrottles() const
132{
133    return &m_throttles;
134}
135
136void
137Switch::printStats(std::ostream& out) const
138{
139    ccprintf(out, "switch_%d_inlinks: %d\n", m_switch_id,
140        m_perfect_switch_ptr->getInLinks());
141    ccprintf(out, "switch_%d_outlinks: %d\n", m_switch_id,
142        m_perfect_switch_ptr->getOutLinks());
143
144    // Average link utilizations
145    double average_utilization = 0.0;
146    int throttle_count = 0;
147
148    for (int i = 0; i < m_throttles.size(); i++) {
149        Throttle* throttle_ptr = m_throttles[i];
150        if (throttle_ptr) {
151            average_utilization += throttle_ptr->getUtilization();
152            throttle_count++;
153        }
154    }
155    average_utilization =
156        throttle_count == 0 ? 0 : average_utilization / throttle_count;
157
158    // Individual link utilizations
159    out << "links_utilized_percent_switch_" << m_switch_id << ": "
160        << average_utilization << endl;
161
162    for (int link = 0; link < m_throttles.size(); link++) {
163        Throttle* throttle_ptr = m_throttles[link];
164        if (throttle_ptr != NULL) {
165            out << "  links_utilized_percent_switch_" << m_switch_id
166                << "_link_" << link << ": "
167                << throttle_ptr->getUtilization() << " bw: "
168                << throttle_ptr->getLinkBandwidth()
169                << " base_latency: " << throttle_ptr->getLatency() << endl;
170        }
171    }
172    out << endl;
173
174    // Traffic breakdown
175    for (int link = 0; link < m_throttles.size(); link++) {
176        Throttle* throttle_ptr = m_throttles[link];
177        if (!throttle_ptr)
178            continue;
179
180        const vector<vector<int> >& message_counts =
181            throttle_ptr->getCounters();
182        for (int int_type = 0; int_type < MessageSizeType_NUM; int_type++) {
183            MessageSizeType type = MessageSizeType(int_type);
184            const vector<int> &mct = message_counts[type];
185            int sum = accumulate(mct.begin(), mct.end(), 0);
186            if (sum == 0)
187                continue;
188
189            out << "  outgoing_messages_switch_" << m_switch_id
190                << "_link_" << link << "_" << type << ": " << sum << " "
191                << sum * RubySystem::getNetwork()->MessageSizeType_to_int(type)
192                << " ";
193            out << mct;
194            out << " base_latency: "
195                << throttle_ptr->getLatency() << endl;
196        }
197    }
198    out << endl;
199}
200
201void
202Switch::clearStats()
203{
204    m_perfect_switch_ptr->clearStats();
205    for (int i = 0; i < m_throttles.size(); i++) {
206        if (m_throttles[i] != NULL)
207            m_throttles[i]->clearStats();
208    }
209}
210
211void
212Switch::printConfig(std::ostream& out) const
213{
214    m_perfect_switch_ptr->printConfig(out);
215    for (int i = 0; i < m_throttles.size(); i++) {
216        if (m_throttles[i] != NULL)
217            m_throttles[i]->printConfig(out);
218    }
219}
220
221void
222Switch::print(std::ostream& out) const
223{
224    // FIXME printing
225    out << "[Switch]";
226}
227
228