comm_monitor.cc (11793:ef606668d247) | comm_monitor.cc (11804:220375a47eeb) |
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1/* 2 * Copyright (c) 2012-2013, 2015 ARM Limited | 1/* 2 * Copyright (c) 2012-2013, 2015 ARM Limited |
3 * All rights reserved | 3 * Copyright (c) 2016 Google Inc. 4 * All rights reserved. |
4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, --- 19 unchanged lines hidden (view full) --- 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Thomas Grass 38 * Andreas Hansson | 5 * 6 * The license below extends only to copyright in the software and shall 7 * not be construed as granting a license to any other intellectual 8 * property including but not limited to intellectual property relating 9 * to a hardware implementation of the functionality of the software 10 * licensed hereunder. You may use the software subject to the license 11 * terms below provided that you ensure that this notice is replicated 12 * unmodified and in its entirety in all distributions of the software, --- 19 unchanged lines hidden (view full) --- 32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 36 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 * 38 * Authors: Thomas Grass 39 * Andreas Hansson |
40 * Rahul Thakur |
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39 */ 40 41#include "mem/comm_monitor.hh" 42 43#include "base/trace.hh" 44#include "debug/CommMonitor.hh" 45#include "sim/stats.hh" 46 47CommMonitor::CommMonitor(Params* params) 48 : MemObject(params), 49 masterPort(name() + "-master", *this), 50 slavePort(name() + "-slave", *this), 51 samplePeriodicEvent(this), 52 samplePeriodTicks(params->sample_period), 53 samplePeriod(params->sample_period / SimClock::Float::s), | 41 */ 42 43#include "mem/comm_monitor.hh" 44 45#include "base/trace.hh" 46#include "debug/CommMonitor.hh" 47#include "sim/stats.hh" 48 49CommMonitor::CommMonitor(Params* params) 50 : MemObject(params), 51 masterPort(name() + "-master", *this), 52 slavePort(name() + "-slave", *this), 53 samplePeriodicEvent(this), 54 samplePeriodTicks(params->sample_period), 55 samplePeriod(params->sample_period / SimClock::Float::s), |
54 readAddrMask(params->read_addr_mask), 55 writeAddrMask(params->write_addr_mask), | |
56 stats(params) 57{ 58 DPRINTF(CommMonitor, 59 "Created monitor %s with sample period %d ticks (%f ms)\n", 60 name(), samplePeriodTicks, samplePeriod * 1E3); 61} 62 63CommMonitor* --- 44 unchanged lines hidden (view full) --- 108} 109 110void 111CommMonitor::recvFunctionalSnoop(PacketPtr pkt) 112{ 113 slavePort.sendFunctionalSnoop(pkt); 114} 115 | 56 stats(params) 57{ 58 DPRINTF(CommMonitor, 59 "Created monitor %s with sample period %d ticks (%f ms)\n", 60 name(), samplePeriodTicks, samplePeriod * 1E3); 61} 62 63CommMonitor* --- 44 unchanged lines hidden (view full) --- 108} 109 110void 111CommMonitor::recvFunctionalSnoop(PacketPtr pkt) 112{ 113 slavePort.sendFunctionalSnoop(pkt); 114} 115 |
116void 117CommMonitor::MonitorStats::updateReqStats( 118 const ProbePoints::PacketInfo& pkt_info, bool is_atomic, 119 bool expects_response) 120{ 121 if (pkt_info.cmd.isRead()) { 122 // Increment number of observed read transactions 123 if (!disableTransactionHists) 124 ++readTrans; 125 126 // Get sample of burst length 127 if (!disableBurstLengthHists) 128 readBurstLengthHist.sample(pkt_info.size); 129 130 // Sample the masked address 131 if (!disableAddrDists) 132 readAddrDist.sample(pkt_info.addr & readAddrMask); 133 134 if (!disableITTDists) { 135 // Sample value of read-read inter transaction time 136 if (timeOfLastRead != 0) 137 ittReadRead.sample(curTick() - timeOfLastRead); 138 timeOfLastRead = curTick(); 139 140 // Sample value of req-req inter transaction time 141 if (timeOfLastReq != 0) 142 ittReqReq.sample(curTick() - timeOfLastReq); 143 timeOfLastReq = curTick(); 144 } 145 if (!is_atomic && !disableOutstandingHists && expects_response) 146 ++outstandingReadReqs; 147 148 } else if (pkt_info.cmd.isWrite()) { 149 // Same as for reads 150 if (!disableTransactionHists) 151 ++writeTrans; 152 153 if (!disableBurstLengthHists) 154 writeBurstLengthHist.sample(pkt_info.size); 155 156 // Update the bandwidth stats on the request 157 if (!disableBandwidthHists) { 158 writtenBytes += pkt_info.size; 159 totalWrittenBytes += pkt_info.size; 160 } 161 162 // Sample the masked write address 163 if (!disableAddrDists) 164 writeAddrDist.sample(pkt_info.addr & writeAddrMask); 165 166 if (!disableITTDists) { 167 // Sample value of write-to-write inter transaction time 168 if (timeOfLastWrite != 0) 169 ittWriteWrite.sample(curTick() - timeOfLastWrite); 170 timeOfLastWrite = curTick(); 171 172 // Sample value of req-to-req inter transaction time 173 if (timeOfLastReq != 0) 174 ittReqReq.sample(curTick() - timeOfLastReq); 175 timeOfLastReq = curTick(); 176 } 177 178 if (!is_atomic && !disableOutstandingHists && expects_response) 179 ++outstandingWriteReqs; 180 } 181} 182 183void 184CommMonitor::MonitorStats::updateRespStats( 185 const ProbePoints::PacketInfo& pkt_info, Tick latency, bool is_atomic) 186{ 187 if (pkt_info.cmd.isRead()) { 188 // Decrement number of outstanding read requests 189 if (!is_atomic && !disableOutstandingHists) { 190 assert(outstandingReadReqs != 0); 191 --outstandingReadReqs; 192 } 193 194 if (!disableLatencyHists) 195 readLatencyHist.sample(latency); 196 197 // Update the bandwidth stats based on responses for reads 198 if (!disableBandwidthHists) { 199 readBytes += pkt_info.size; 200 totalReadBytes += pkt_info.size; 201 } 202 203 } else if (pkt_info.cmd.isWrite()) { 204 // Decrement number of outstanding write requests 205 if (!is_atomic && !disableOutstandingHists) { 206 assert(outstandingWriteReqs != 0); 207 --outstandingWriteReqs; 208 } 209 210 if (!disableLatencyHists) 211 writeLatencyHist.sample(latency); 212 } 213} 214 |
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116Tick 117CommMonitor::recvAtomic(PacketPtr pkt) 118{ | 215Tick 216CommMonitor::recvAtomic(PacketPtr pkt) 217{ |
218 const bool expects_response(pkt->needsResponse() && 219 !pkt->cacheResponding()); |
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119 ProbePoints::PacketInfo req_pkt_info(pkt); 120 ppPktReq->notify(req_pkt_info); 121 122 const Tick delay(masterPort.sendAtomic(pkt)); | 220 ProbePoints::PacketInfo req_pkt_info(pkt); 221 ppPktReq->notify(req_pkt_info); 222 223 const Tick delay(masterPort.sendAtomic(pkt)); |
224 225 stats.updateReqStats(req_pkt_info, true, expects_response); 226 if (expects_response) 227 stats.updateRespStats(req_pkt_info, delay, true); 228 |
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123 assert(pkt->isResponse()); 124 ProbePoints::PacketInfo resp_pkt_info(pkt); 125 ppPktResp->notify(resp_pkt_info); 126 return delay; 127} 128 129Tick 130CommMonitor::recvAtomicSnoop(PacketPtr pkt) --- 8 unchanged lines hidden (view full) --- 139 assert(pkt->isRequest()); 140 141 // Store relevant fields of packet, because packet may be modified 142 // or even deleted when sendTiming() is called. 143 const ProbePoints::PacketInfo pkt_info(pkt); 144 145 const bool is_read = pkt->isRead(); 146 const bool is_write = pkt->isWrite(); | 229 assert(pkt->isResponse()); 230 ProbePoints::PacketInfo resp_pkt_info(pkt); 231 ppPktResp->notify(resp_pkt_info); 232 return delay; 233} 234 235Tick 236CommMonitor::recvAtomicSnoop(PacketPtr pkt) --- 8 unchanged lines hidden (view full) --- 245 assert(pkt->isRequest()); 246 247 // Store relevant fields of packet, because packet may be modified 248 // or even deleted when sendTiming() is called. 249 const ProbePoints::PacketInfo pkt_info(pkt); 250 251 const bool is_read = pkt->isRead(); 252 const bool is_write = pkt->isWrite(); |
147 const bool expects_response( 148 pkt->needsResponse() && !pkt->cacheResponding()); | 253 const bool expects_response(pkt->needsResponse() && 254 !pkt->cacheResponding()); |
149 150 // If a cache miss is served by a cache, a monitor near the memory 151 // would see a request which needs a response, but this response 152 // would not come back from the memory. Therefore we additionally 153 // have to check the cacheResponding flag 154 if (expects_response && !stats.disableLatencyHists) { 155 pkt->pushSenderState(new CommMonitorSenderState(curTick())); 156 } --- 5 unchanged lines hidden (view full) --- 162 if (!successful && expects_response && !stats.disableLatencyHists) { 163 delete pkt->popSenderState(); 164 } 165 166 if (successful) { 167 ppPktReq->notify(pkt_info); 168 } 169 | 255 256 // If a cache miss is served by a cache, a monitor near the memory 257 // would see a request which needs a response, but this response 258 // would not come back from the memory. Therefore we additionally 259 // have to check the cacheResponding flag 260 if (expects_response && !stats.disableLatencyHists) { 261 pkt->pushSenderState(new CommMonitorSenderState(curTick())); 262 } --- 5 unchanged lines hidden (view full) --- 268 if (!successful && expects_response && !stats.disableLatencyHists) { 269 delete pkt->popSenderState(); 270 } 271 272 if (successful) { 273 ppPktReq->notify(pkt_info); 274 } 275 |
170 if (successful && is_read) { 171 DPRINTF(CommMonitor, "Forwarded read request\n"); 172 173 // Increment number of observed read transactions 174 if (!stats.disableTransactionHists) { 175 ++stats.readTrans; 176 } 177 178 // Get sample of burst length 179 if (!stats.disableBurstLengthHists) { 180 stats.readBurstLengthHist.sample(pkt_info.size); 181 } 182 183 // Sample the masked address 184 if (!stats.disableAddrDists) { 185 stats.readAddrDist.sample(pkt_info.addr & readAddrMask); 186 } 187 188 // If it needs a response increment number of outstanding read 189 // requests 190 if (!stats.disableOutstandingHists && expects_response) { 191 ++stats.outstandingReadReqs; 192 } 193 194 if (!stats.disableITTDists) { 195 // Sample value of read-read inter transaction time 196 if (stats.timeOfLastRead != 0) { 197 stats.ittReadRead.sample(curTick() - stats.timeOfLastRead); 198 } 199 stats.timeOfLastRead = curTick(); 200 201 // Sample value of req-req inter transaction time 202 if (stats.timeOfLastReq != 0) { 203 stats.ittReqReq.sample(curTick() - stats.timeOfLastReq); 204 } 205 stats.timeOfLastReq = curTick(); 206 } 207 } else if (successful && is_write) { 208 DPRINTF(CommMonitor, "Forwarded write request\n"); 209 210 // Same as for reads 211 if (!stats.disableTransactionHists) { 212 ++stats.writeTrans; 213 } 214 215 if (!stats.disableBurstLengthHists) { 216 stats.writeBurstLengthHist.sample(pkt_info.size); 217 } 218 219 // Update the bandwidth stats on the request 220 if (!stats.disableBandwidthHists) { 221 stats.writtenBytes += pkt_info.size; 222 stats.totalWrittenBytes += pkt_info.size; 223 } 224 225 // Sample the masked write address 226 if (!stats.disableAddrDists) { 227 stats.writeAddrDist.sample(pkt_info.addr & writeAddrMask); 228 } 229 230 if (!stats.disableOutstandingHists && expects_response) { 231 ++stats.outstandingWriteReqs; 232 } 233 234 if (!stats.disableITTDists) { 235 // Sample value of write-to-write inter transaction time 236 if (stats.timeOfLastWrite != 0) { 237 stats.ittWriteWrite.sample(curTick() - stats.timeOfLastWrite); 238 } 239 stats.timeOfLastWrite = curTick(); 240 241 // Sample value of req-to-req inter transaction time 242 if (stats.timeOfLastReq != 0) { 243 stats.ittReqReq.sample(curTick() - stats.timeOfLastReq); 244 } 245 stats.timeOfLastReq = curTick(); 246 } 247 } else if (successful) { 248 DPRINTF(CommMonitor, "Forwarded non read/write request\n"); | 276 if (successful) { 277 DPRINTF(CommMonitor, "Forwarded %s request\n", 278 (is_read ? "read" : (is_write ? "write" : "non read/write"))); 279 stats.updateReqStats(pkt_info, false, expects_response); |
249 } | 280 } |
250 | |
251 return successful; 252} 253 254bool 255CommMonitor::recvTimingResp(PacketPtr pkt) 256{ 257 // should always see responses 258 assert(pkt->isResponse()); --- 31 unchanged lines hidden (view full) --- 290 // Don't delete anything and let the packet look like we 291 // did not touch it 292 pkt->senderState = received_state; 293 } 294 } 295 296 if (successful) { 297 ppPktResp->notify(pkt_info); | 281 return successful; 282} 283 284bool 285CommMonitor::recvTimingResp(PacketPtr pkt) 286{ 287 // should always see responses 288 assert(pkt->isResponse()); --- 31 unchanged lines hidden (view full) --- 320 // Don't delete anything and let the packet look like we 321 // did not touch it 322 pkt->senderState = received_state; 323 } 324 } 325 326 if (successful) { 327 ppPktResp->notify(pkt_info); |
328 DPRINTF(CommMonitor, "Received %s response\n", 329 (is_read ? "Read" : (is_write ? "Write" : "non read/write"))); 330 stats.updateRespStats(pkt_info, latency, false); |
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298 } | 331 } |
299 300 if (successful && is_read) { 301 // Decrement number of outstanding read requests 302 DPRINTF(CommMonitor, "Received read response\n"); 303 if (!stats.disableOutstandingHists) { 304 assert(stats.outstandingReadReqs != 0); 305 --stats.outstandingReadReqs; 306 } 307 308 if (!stats.disableLatencyHists) { 309 stats.readLatencyHist.sample(latency); 310 } 311 312 // Update the bandwidth stats based on responses for reads 313 if (!stats.disableBandwidthHists) { 314 stats.readBytes += pkt_info.size; 315 stats.totalReadBytes += pkt_info.size; 316 } 317 318 } else if (successful && is_write) { 319 // Decrement number of outstanding write requests 320 DPRINTF(CommMonitor, "Received write response\n"); 321 if (!stats.disableOutstandingHists) { 322 assert(stats.outstandingWriteReqs != 0); 323 --stats.outstandingWriteReqs; 324 } 325 326 if (!stats.disableLatencyHists) { 327 stats.writeLatencyHist.sample(latency); 328 } 329 } else if (successful) { 330 DPRINTF(CommMonitor, "Received non read/write response\n"); 331 } | |
332 return successful; 333} 334 335void 336CommMonitor::recvTimingSnoopReq(PacketPtr pkt) 337{ 338 slavePort.sendTimingSnoopReq(pkt); 339} --- 216 unchanged lines hidden --- | 332 return successful; 333} 334 335void 336CommMonitor::recvTimingSnoopReq(PacketPtr pkt) 337{ 338 slavePort.sendTimingSnoopReq(pkt); 339} --- 216 unchanged lines hidden --- |