658849d101
This patch developed by Nilay Vaish converts all the old GEMS-style ruby debug calls to the appropriate M5 debug calls.
333 lines
12 KiB
C++
333 lines
12 KiB
C++
/*
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* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <algorithm>
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#include "mem/protocol/Protocol.hh"
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#include "mem/ruby/buffers/MessageBuffer.hh"
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#include "mem/ruby/network/simple/PerfectSwitch.hh"
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#include "mem/ruby/network/simple/SimpleNetwork.hh"
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#include "mem/ruby/profiler/Profiler.hh"
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#include "mem/ruby/slicc_interface/NetworkMessage.hh"
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#include "mem/ruby/system/System.hh"
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using namespace std;
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const int PRIORITY_SWITCH_LIMIT = 128;
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// Operator for helper class
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bool
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operator<(const LinkOrder& l1, const LinkOrder& l2)
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{
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return (l1.m_value < l2.m_value);
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}
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PerfectSwitch::PerfectSwitch(SwitchID sid, SimpleNetwork* network_ptr)
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{
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m_virtual_networks = network_ptr->getNumberOfVirtualNetworks();
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m_switch_id = sid;
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m_round_robin_start = 0;
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m_network_ptr = network_ptr;
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m_wakeups_wo_switch = 0;
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}
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void
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PerfectSwitch::addInPort(const vector<MessageBuffer*>& in)
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{
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assert(in.size() == m_virtual_networks);
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NodeID port = m_in.size();
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m_in.push_back(in);
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for (int j = 0; j < m_virtual_networks; j++) {
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m_in[port][j]->setConsumer(this);
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string desc = csprintf("[Queue from port %s %s %s to PerfectSwitch]",
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NodeIDToString(m_switch_id), NodeIDToString(port),
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NodeIDToString(j));
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m_in[port][j]->setDescription(desc);
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}
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}
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void
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PerfectSwitch::addOutPort(const vector<MessageBuffer*>& out,
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const NetDest& routing_table_entry)
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{
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assert(out.size() == m_virtual_networks);
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// Setup link order
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LinkOrder l;
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l.m_value = 0;
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l.m_link = m_out.size();
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m_link_order.push_back(l);
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// Add to routing table
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m_out.push_back(out);
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m_routing_table.push_back(routing_table_entry);
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}
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void
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PerfectSwitch::clearRoutingTables()
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{
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m_routing_table.clear();
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}
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void
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PerfectSwitch::clearBuffers()
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{
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for (int i = 0; i < m_in.size(); i++){
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for(int vnet = 0; vnet < m_virtual_networks; vnet++) {
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m_in[i][vnet]->clear();
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}
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}
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for (int i = 0; i < m_out.size(); i++){
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for(int vnet = 0; vnet < m_virtual_networks; vnet++) {
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m_out[i][vnet]->clear();
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}
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}
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}
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void
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PerfectSwitch::reconfigureOutPort(const NetDest& routing_table_entry)
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{
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m_routing_table.push_back(routing_table_entry);
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}
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PerfectSwitch::~PerfectSwitch()
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{
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}
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void
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PerfectSwitch::wakeup()
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{
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DPRINTF(RubyNetwork, "m_switch_id: %d\n",m_switch_id);
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MsgPtr msg_ptr;
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// Give the highest numbered link priority most of the time
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m_wakeups_wo_switch++;
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int highest_prio_vnet = m_virtual_networks-1;
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int lowest_prio_vnet = 0;
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int decrementer = 1;
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NetworkMessage* net_msg_ptr = NULL;
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// invert priorities to avoid starvation seen in the component network
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if (m_wakeups_wo_switch > PRIORITY_SWITCH_LIMIT) {
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m_wakeups_wo_switch = 0;
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highest_prio_vnet = 0;
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lowest_prio_vnet = m_virtual_networks-1;
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decrementer = -1;
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}
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// For all components incoming queues
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for (int vnet = highest_prio_vnet;
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(vnet * decrementer) >= (decrementer * lowest_prio_vnet);
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vnet -= decrementer) {
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// This is for round-robin scheduling
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int incoming = m_round_robin_start;
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m_round_robin_start++;
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if (m_round_robin_start >= m_in.size()) {
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m_round_robin_start = 0;
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}
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// for all input ports, use round robin scheduling
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for (int counter = 0; counter < m_in.size(); counter++) {
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// Round robin scheduling
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incoming++;
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if (incoming >= m_in.size()) {
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incoming = 0;
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}
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// temporary vectors to store the routing results
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vector<LinkID> output_links;
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vector<NetDest> output_link_destinations;
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// Is there a message waiting?
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while (m_in[incoming][vnet]->isReady()) {
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DPRINTF(RubyNetwork, "incoming: %d\n", incoming);
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// Peek at message
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msg_ptr = m_in[incoming][vnet]->peekMsgPtr();
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net_msg_ptr = safe_cast<NetworkMessage*>(msg_ptr.get());
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DPRINTF(RubyNetwork, "Message: %s\n", (*net_msg_ptr));
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output_links.clear();
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output_link_destinations.clear();
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NetDest msg_dsts =
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net_msg_ptr->getInternalDestination();
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// Unfortunately, the token-protocol sends some
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// zero-destination messages, so this assert isn't valid
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// assert(msg_dsts.count() > 0);
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assert(m_link_order.size() == m_routing_table.size());
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assert(m_link_order.size() == m_out.size());
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if (m_network_ptr->getAdaptiveRouting()) {
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if (m_network_ptr->isVNetOrdered(vnet)) {
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// Don't adaptively route
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for (int out = 0; out < m_out.size(); out++) {
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m_link_order[out].m_link = out;
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m_link_order[out].m_value = 0;
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}
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} else {
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// Find how clogged each link is
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for (int out = 0; out < m_out.size(); out++) {
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int out_queue_length = 0;
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for (int v = 0; v < m_virtual_networks; v++) {
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out_queue_length += m_out[out][v]->getSize();
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}
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int value =
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(out_queue_length << 8) | (random() & 0xff);
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m_link_order[out].m_link = out;
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m_link_order[out].m_value = value;
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}
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// Look at the most empty link first
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sort(m_link_order.begin(), m_link_order.end());
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}
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}
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for (int i = 0; i < m_routing_table.size(); i++) {
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// pick the next link to look at
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int link = m_link_order[i].m_link;
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NetDest dst = m_routing_table[link];
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DPRINTF(RubyNetwork, "dst: %s\n", dst);
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if (!msg_dsts.intersectionIsNotEmpty(dst))
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continue;
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// Remember what link we're using
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output_links.push_back(link);
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// Need to remember which destinations need this
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// message in another vector. This Set is the
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// intersection of the routing_table entry and the
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// current destination set. The intersection must
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// not be empty, since we are inside "if"
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output_link_destinations.push_back(msg_dsts.AND(dst));
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// Next, we update the msg_destination not to
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// include those nodes that were already handled
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// by this link
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msg_dsts.removeNetDest(dst);
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}
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assert(msg_dsts.count() == 0);
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//assert(output_links.size() > 0);
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// Check for resources - for all outgoing queues
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bool enough = true;
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for (int i = 0; i < output_links.size(); i++) {
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int outgoing = output_links[i];
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if (!m_out[outgoing][vnet]->areNSlotsAvailable(1))
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enough = false;
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DPRINTF(RubyNetwork, "Checking if node is blocked\n"
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"outgoing: %d, vnet: %d, enough: %d\n",
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outgoing, vnet, enough);
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}
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// There were not enough resources
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if (!enough) {
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g_eventQueue_ptr->scheduleEvent(this, 1);
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DPRINTF(RubyNetwork, "Can't deliver message since a node "
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"is blocked\n"
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"Message: %s\n", (*net_msg_ptr));
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break; // go to next incoming port
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}
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MsgPtr unmodified_msg_ptr;
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if (output_links.size() > 1) {
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// If we are sending this message down more than
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// one link (size>1), we need to make a copy of
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// the message so each branch can have a different
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// internal destination we need to create an
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// unmodified MsgPtr because the MessageBuffer
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// enqueue func will modify the message
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// This magic line creates a private copy of the
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// message
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unmodified_msg_ptr = msg_ptr->clone();
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}
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// Enqueue it - for all outgoing queues
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for (int i=0; i<output_links.size(); i++) {
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int outgoing = output_links[i];
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if (i > 0) {
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// create a private copy of the unmodified
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// message
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msg_ptr = unmodified_msg_ptr->clone();
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}
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// Change the internal destination set of the
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// message so it knows which destinations this
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// link is responsible for.
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net_msg_ptr = safe_cast<NetworkMessage*>(msg_ptr.get());
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net_msg_ptr->getInternalDestination() =
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output_link_destinations[i];
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// Enqeue msg
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DPRINTF(RubyNetwork, "Switch: %d enqueuing net msg from "
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"inport[%d][%d] to outport [%d][%d] time: %lld.\n",
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m_switch_id, incoming, vnet, outgoing, vnet,
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g_eventQueue_ptr->getTime());
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m_out[outgoing][vnet]->enqueue(msg_ptr);
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}
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// Dequeue msg
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m_in[incoming][vnet]->pop();
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}
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}
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}
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}
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void
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PerfectSwitch::printStats(std::ostream& out) const
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{
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out << "PerfectSwitch printStats" << endl;
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}
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void
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PerfectSwitch::clearStats()
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{
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}
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void
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PerfectSwitch::printConfig(std::ostream& out) const
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{
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}
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void
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PerfectSwitch::print(std::ostream& out) const
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{
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out << "[PerfectSwitch " << m_switch_id << "]";
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}
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