1/*
2 * Copyright (c) 2012-2013, 2015, 2018 ARM Limited
3 * Copyright (c) 2016 Google Inc.
4 * Copyright (c) 2017, Centre National de la Recherche Scientifique
5 * All rights reserved.
6 *
7 * The license below extends only to copyright in the software and shall
8 * not be construed as granting a license to any other intellectual
9 * property including but not limited to intellectual property relating
10 * to a hardware implementation of the functionality of the software

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50
51CommMonitor::CommMonitor(Params* params)
52 : SimObject(params),
53 masterPort(name() + "-master", *this),
54 slavePort(name() + "-slave", *this),
55 samplePeriodicEvent([this]{ samplePeriodic(); }, name()),
56 samplePeriodTicks(params->sample_period),
57 samplePeriod(params->sample_period / SimClock::Float::s),
58 stats(params)
59{
60 DPRINTF(CommMonitor,
61 "Created monitor %s with sample period %d ticks (%f ms)\n",
62 name(), samplePeriodTicks, samplePeriod * 1E3);
63}
64
65CommMonitor*
66CommMonitorParams::create()

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102}
103
104void
105CommMonitor::recvFunctionalSnoop(PacketPtr pkt)
106{
107 slavePort.sendFunctionalSnoop(pkt);
108}
109
110void
111CommMonitor::MonitorStats::updateReqStats(
112 const ProbePoints::PacketInfo& pkt_info, bool is_atomic,
113 bool expects_response)
114{
115 if (pkt_info.cmd.isRead()) {
116 // Increment number of observed read transactions
117 if (!disableTransactionHists)

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375
376void
377CommMonitor::recvRangeChange()
378{
379 slavePort.sendRangeChange();
380}
381
382void
383CommMonitor::regStats()
384{
385 SimObject::regStats();
386
387 // Initialise all the monitor stats
388 using namespace Stats;
389
390 stats.readBurstLengthHist
391 .init(params()->burst_length_bins)
392 .name(name() + ".readBurstLengthHist")
393 .desc("Histogram of burst lengths of transmitted packets")
394 .flags(stats.disableBurstLengthHists ? nozero : pdf);
395
396 stats.writeBurstLengthHist
397 .init(params()->burst_length_bins)
398 .name(name() + ".writeBurstLengthHist")
399 .desc("Histogram of burst lengths of transmitted packets")
400 .flags(stats.disableBurstLengthHists ? nozero : pdf);
401
402 // Stats based on received responses
403 stats.readBandwidthHist
404 .init(params()->bandwidth_bins)
405 .name(name() + ".readBandwidthHist")
406 .desc("Histogram of read bandwidth per sample period (bytes/s)")
407 .flags(stats.disableBandwidthHists ? nozero : pdf);
408
409 stats.averageReadBW
410 .name(name() + ".averageReadBandwidth")
411 .desc("Average read bandwidth (bytes/s)")
412 .flags(stats.disableBandwidthHists ? nozero : pdf);
413
414 stats.totalReadBytes
415 .name(name() + ".totalReadBytes")
416 .desc("Number of bytes read")
417 .flags(stats.disableBandwidthHists ? nozero : pdf);
418
419 stats.averageReadBW = stats.totalReadBytes / simSeconds;
420
421 // Stats based on successfully sent requests
422 stats.writeBandwidthHist
423 .init(params()->bandwidth_bins)
424 .name(name() + ".writeBandwidthHist")
425 .desc("Histogram of write bandwidth (bytes/s)")
426 .flags(stats.disableBandwidthHists ? (pdf | nozero) : pdf);
427
428 stats.averageWriteBW
429 .name(name() + ".averageWriteBandwidth")
430 .desc("Average write bandwidth (bytes/s)")
431 .flags(stats.disableBandwidthHists ? nozero : pdf);
432
433 stats.totalWrittenBytes
434 .name(name() + ".totalWrittenBytes")
435 .desc("Number of bytes written")
436 .flags(stats.disableBandwidthHists ? nozero : pdf);
437
438 stats.averageWriteBW = stats.totalWrittenBytes / simSeconds;
439
440 stats.readLatencyHist
441 .init(params()->latency_bins)
442 .name(name() + ".readLatencyHist")
443 .desc("Read request-response latency")
444 .flags(stats.disableLatencyHists ? nozero : pdf);
445
446 stats.writeLatencyHist
447 .init(params()->latency_bins)
448 .name(name() + ".writeLatencyHist")
449 .desc("Write request-response latency")
450 .flags(stats.disableLatencyHists ? nozero : pdf);
451
452 stats.ittReadRead
453 .init(1, params()->itt_max_bin, params()->itt_max_bin /
454 params()->itt_bins)
455 .name(name() + ".ittReadRead")
456 .desc("Read-to-read inter transaction time")
457 .flags(stats.disableITTDists ? nozero : pdf);
458
459 stats.ittWriteWrite
460 .init(1, params()->itt_max_bin, params()->itt_max_bin /
461 params()->itt_bins)
462 .name(name() + ".ittWriteWrite")
463 .desc("Write-to-write inter transaction time")
464 .flags(stats.disableITTDists ? nozero : pdf);
465
466 stats.ittReqReq
467 .init(1, params()->itt_max_bin, params()->itt_max_bin /
468 params()->itt_bins)
469 .name(name() + ".ittReqReq")
470 .desc("Request-to-request inter transaction time")
471 .flags(stats.disableITTDists ? nozero : pdf);
472
473 stats.outstandingReadsHist
474 .init(params()->outstanding_bins)
475 .name(name() + ".outstandingReadsHist")
476 .desc("Outstanding read transactions")
477 .flags(stats.disableOutstandingHists ? nozero : pdf);
478
479 stats.outstandingWritesHist
480 .init(params()->outstanding_bins)
481 .name(name() + ".outstandingWritesHist")
482 .desc("Outstanding write transactions")
483 .flags(stats.disableOutstandingHists ? nozero : pdf);
484
485 stats.readTransHist
486 .init(params()->transaction_bins)
487 .name(name() + ".readTransHist")
488 .desc("Histogram of read transactions per sample period")
489 .flags(stats.disableTransactionHists ? nozero : pdf);
490
491 stats.writeTransHist
492 .init(params()->transaction_bins)
493 .name(name() + ".writeTransHist")
494 .desc("Histogram of write transactions per sample period")
495 .flags(stats.disableTransactionHists ? nozero : pdf);
496
497 stats.readAddrDist
498 .init(0)
499 .name(name() + ".readAddrDist")
500 .desc("Read address distribution")
501 .flags(stats.disableAddrDists ? nozero : pdf);
502
503 stats.writeAddrDist
504 .init(0)
505 .name(name() + ".writeAddrDist")
506 .desc("Write address distribution")
507 .flags(stats.disableAddrDists ? nozero : pdf);
508}
509
510void
511CommMonitor::samplePeriodic()
512{
513 // the periodic stats update runs on the granularity of sample
514 // periods, but in combination with this there may also be a
515 // external resets and dumps of the stats (through schedStatEvent)
516 // causing the stats themselves to capture less than a sample
517 // period
518

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