Throttle.cc (10301:44839e8febbd) | Throttle.cc (10311:ad9c042dce54) |
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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; --- 55 unchanged lines hidden (view full) --- 64 m_sID = 0; 65} 66 67void 68Throttle::init(NodeID node, Cycles link_latency, 69 int link_bandwidth_multiplier, int endpoint_bandwidth) 70{ 71 m_node = node; | 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; --- 55 unchanged lines hidden (view full) --- 64 m_sID = 0; 65} 66 67void 68Throttle::init(NodeID node, Cycles link_latency, 69 int link_bandwidth_multiplier, int endpoint_bandwidth) 70{ 71 m_node = node; |
72 m_vnets = 0; 73 | |
74 assert(link_bandwidth_multiplier > 0); 75 m_link_bandwidth_multiplier = link_bandwidth_multiplier; | 72 assert(link_bandwidth_multiplier > 0); 73 m_link_bandwidth_multiplier = link_bandwidth_multiplier; |
74 |
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76 m_link_latency = link_latency; 77 m_endpoint_bandwidth = endpoint_bandwidth; 78 79 m_wakeups_wo_switch = 0; | 75 m_link_latency = link_latency; 76 m_endpoint_bandwidth = endpoint_bandwidth; 77 78 m_wakeups_wo_switch = 0; |
80 | |
81 m_link_utilization_proxy = 0; 82} 83 84void | 79 m_link_utilization_proxy = 0; 80} 81 82void |
85Throttle::addLinks(const std::vector<MessageBuffer*>& in_vec, 86 const std::vector<MessageBuffer*>& out_vec) | 83Throttle::addLinks(const map<int, MessageBuffer*>& in_vec, 84 const map<int, MessageBuffer*>& out_vec) |
87{ 88 assert(in_vec.size() == out_vec.size()); | 85{ 86 assert(in_vec.size() == out_vec.size()); |
89 for (int i=0; i<in_vec.size(); i++) { 90 addVirtualNetwork(in_vec[i], out_vec[i]); | 87 88 for (auto& it : in_vec) { 89 int vnet = it.first; 90 91 auto jt = out_vec.find(vnet); 92 assert(jt != out_vec.end()); 93 94 MessageBuffer *in_ptr = it.second; 95 MessageBuffer *out_ptr = (*jt).second; 96 97 m_in[vnet] = in_ptr; 98 m_out[vnet] = out_ptr; 99 m_units_remaining[vnet] = 0; 100 101 // Set consumer and description 102 in_ptr->setConsumer(this); 103 string desc = "[Queue to Throttle " + to_string(m_sID) + " " + 104 to_string(m_node) + "]"; 105 in_ptr->setDescription(desc); |
91 } 92} 93 94void | 106 } 107} 108 109void |
95Throttle::addVirtualNetwork(MessageBuffer* in_ptr, MessageBuffer* out_ptr) | 110Throttle::operateVnet(int vnet, int &bw_remaining, bool &schedule_wakeup, 111 MessageBuffer *in, MessageBuffer *out) |
96{ | 112{ |
97 m_units_remaining.push_back(0); 98 m_in.push_back(in_ptr); 99 m_out.push_back(out_ptr); | 113 assert(out != NULL); 114 assert(in != NULL); 115 assert(m_units_remaining[vnet] >= 0); |
100 | 116 |
101 // Set consumer and description 102 m_in[m_vnets]->setConsumer(this); | 117 while (bw_remaining > 0 && (in->isReady() || m_units_remaining[vnet] > 0) && 118 out->areNSlotsAvailable(1)) { |
103 | 119 |
104 string desc = "[Queue to Throttle " + to_string(m_sID) + " " + 105 to_string(m_node) + "]"; 106 m_in[m_vnets]->setDescription(desc); 107 m_vnets++; | 120 // See if we are done transferring the previous message on 121 // this virtual network 122 if (m_units_remaining[vnet] == 0 && in->isReady()) { 123 // Find the size of the message we are moving 124 MsgPtr msg_ptr = in->peekMsgPtr(); 125 NetworkMessage* net_msg_ptr = 126 safe_cast<NetworkMessage*>(msg_ptr.get()); 127 m_units_remaining[vnet] += 128 network_message_to_size(net_msg_ptr); 129 130 DPRINTF(RubyNetwork, "throttle: %d my bw %d bw spent " 131 "enqueueing net msg %d time: %lld.\n", 132 m_node, getLinkBandwidth(), m_units_remaining[vnet], 133 g_system_ptr->curCycle()); 134 135 // Move the message 136 in->dequeue(); 137 out->enqueue(msg_ptr, m_link_latency); 138 139 // Count the message 140 m_msg_counts[net_msg_ptr->getMessageSize()][vnet]++; 141 DPRINTF(RubyNetwork, "%s\n", *out); 142 } 143 144 // Calculate the amount of bandwidth we spent on this message 145 int diff = m_units_remaining[vnet] - bw_remaining; 146 m_units_remaining[vnet] = max(0, diff); 147 bw_remaining = max(0, -diff); 148 } 149 150 if (bw_remaining > 0 && (in->isReady() || m_units_remaining[vnet] > 0) && 151 !out->areNSlotsAvailable(1)) { 152 DPRINTF(RubyNetwork, "vnet: %d", vnet); 153 154 // schedule me to wakeup again because I'm waiting for my 155 // output queue to become available 156 schedule_wakeup = true; 157 } |
108} 109 110void 111Throttle::wakeup() 112{ 113 // Limits the number of message sent to a limited number of bytes/cycle. 114 assert(getLinkBandwidth() > 0); 115 int bw_remaining = getLinkBandwidth(); 116 | 158} 159 160void 161Throttle::wakeup() 162{ 163 // Limits the number of message sent to a limited number of bytes/cycle. 164 assert(getLinkBandwidth() > 0); 165 int bw_remaining = getLinkBandwidth(); 166 |
117 // Give the highest numbered link priority most of the time | |
118 m_wakeups_wo_switch++; | 167 m_wakeups_wo_switch++; |
119 int highest_prio_vnet = m_vnets-1; 120 int lowest_prio_vnet = 0; 121 int counter = 1; | |
122 bool schedule_wakeup = false; 123 | 168 bool schedule_wakeup = false; 169 |
170 // variable for deciding the direction in which to iterate 171 bool iteration_direction = false; 172 173 |
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124 // invert priorities to avoid starvation seen in the component network 125 if (m_wakeups_wo_switch > PRIORITY_SWITCH_LIMIT) { 126 m_wakeups_wo_switch = 0; | 174 // invert priorities to avoid starvation seen in the component network 175 if (m_wakeups_wo_switch > PRIORITY_SWITCH_LIMIT) { 176 m_wakeups_wo_switch = 0; |
127 highest_prio_vnet = 0; 128 lowest_prio_vnet = m_vnets-1; 129 counter = -1; | 177 iteration_direction = true; |
130 } 131 | 178 } 179 |
132 for (int vnet = highest_prio_vnet; 133 (vnet * counter) >= (counter * lowest_prio_vnet); 134 vnet -= counter) { 135 136 assert(m_out[vnet] != NULL); 137 assert(m_in[vnet] != NULL); 138 assert(m_units_remaining[vnet] >= 0); 139 140 while (bw_remaining > 0 && 141 (m_in[vnet]->isReady() || m_units_remaining[vnet] > 0) && 142 m_out[vnet]->areNSlotsAvailable(1)) { 143 144 // See if we are done transferring the previous message on 145 // this virtual network 146 if (m_units_remaining[vnet] == 0 && m_in[vnet]->isReady()) { 147 // Find the size of the message we are moving 148 MsgPtr msg_ptr = m_in[vnet]->peekMsgPtr(); 149 NetworkMessage* net_msg_ptr = 150 safe_cast<NetworkMessage*>(msg_ptr.get()); 151 m_units_remaining[vnet] += 152 network_message_to_size(net_msg_ptr); 153 154 DPRINTF(RubyNetwork, "throttle: %d my bw %d bw spent " 155 "enqueueing net msg %d time: %lld.\n", 156 m_node, getLinkBandwidth(), m_units_remaining[vnet], 157 g_system_ptr->curCycle()); 158 159 // Move the message 160 m_in[vnet]->dequeue(); 161 m_out[vnet]->enqueue(msg_ptr, m_link_latency); 162 163 // Count the message 164 m_msg_counts[net_msg_ptr->getMessageSize()][vnet]++; 165 166 DPRINTF(RubyNetwork, "%s\n", *m_out[vnet]); 167 } 168 169 // Calculate the amount of bandwidth we spent on this message 170 int diff = m_units_remaining[vnet] - bw_remaining; 171 m_units_remaining[vnet] = max(0, diff); 172 bw_remaining = max(0, -diff); | 180 if (iteration_direction) { 181 for (auto& it : m_in) { 182 int vnet = it.first; 183 operateVnet(vnet, bw_remaining, schedule_wakeup, 184 it.second, m_out[vnet]); |
173 } | 185 } |
174 175 if (bw_remaining > 0 && 176 (m_in[vnet]->isReady() || m_units_remaining[vnet] > 0) && 177 !m_out[vnet]->areNSlotsAvailable(1)) { 178 DPRINTF(RubyNetwork, "vnet: %d", vnet); 179 // schedule me to wakeup again because I'm waiting for my 180 // output queue to become available 181 schedule_wakeup = true; | 186 } else { 187 for (auto it = m_in.rbegin(); it != m_in.rend(); ++it) { 188 int vnet = (*it).first; 189 operateVnet(vnet, bw_remaining, schedule_wakeup, 190 (*it).second, m_out[vnet]); |
182 } 183 } 184 185 // We should only wake up when we use the bandwidth 186 // This is only mostly true 187 // assert(bw_remaining != getLinkBandwidth()); 188 189 // Record that we used some or all of the link bandwidth this cycle --- 20 unchanged lines hidden (view full) --- 210Throttle::regStats(string parent) 211{ 212 m_link_utilization 213 .name(parent + csprintf(".throttle%i", m_node) + ".link_utilization"); 214 215 for (MessageSizeType type = MessageSizeType_FIRST; 216 type < MessageSizeType_NUM; ++type) { 217 m_msg_counts[(unsigned int)type] | 191 } 192 } 193 194 // We should only wake up when we use the bandwidth 195 // This is only mostly true 196 // assert(bw_remaining != getLinkBandwidth()); 197 198 // Record that we used some or all of the link bandwidth this cycle --- 20 unchanged lines hidden (view full) --- 219Throttle::regStats(string parent) 220{ 221 m_link_utilization 222 .name(parent + csprintf(".throttle%i", m_node) + ".link_utilization"); 223 224 for (MessageSizeType type = MessageSizeType_FIRST; 225 type < MessageSizeType_NUM; ++type) { 226 m_msg_counts[(unsigned int)type] |
218 .init(m_vnets) | 227 .init(Network::getNumberOfVirtualNetworks()) |
219 .name(parent + csprintf(".throttle%i", m_node) + ".msg_count." + 220 MessageSizeType_to_string(type)) 221 .flags(Stats::nozero) 222 ; 223 m_msg_bytes[(unsigned int) type] 224 .name(parent + csprintf(".throttle%i", m_node) + ".msg_bytes." + 225 MessageSizeType_to_string(type)) 226 .flags(Stats::nozero) --- 40 unchanged lines hidden --- | 228 .name(parent + csprintf(".throttle%i", m_node) + ".msg_count." + 229 MessageSizeType_to_string(type)) 230 .flags(Stats::nozero) 231 ; 232 m_msg_bytes[(unsigned int) type] 233 .name(parent + csprintf(".throttle%i", m_node) + ".msg_bytes." + 234 MessageSizeType_to_string(type)) 235 .flags(Stats::nozero) --- 40 unchanged lines hidden --- |