786 lines
23 KiB
C++
786 lines
23 KiB
C++
/*
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Copyright (C) 2010-2012 Srivats P.
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This file is part of "Ostinato"
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This is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#define __STDC_FORMAT_MACROS
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#include "abstractport.h"
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#include "../common/abstractprotocol.h"
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#include "../common/streambase.h"
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#include "devicemanager.h"
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#include "packetbuffer.h"
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#include <QString>
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#include <QIODevice>
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#include <inttypes.h>
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#include <limits.h>
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#include <math.h>
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AbstractPort::AbstractPort(int id, const char *device)
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{
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isUsable_ = true;
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data_.mutable_port_id()->set_id(id);
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data_.set_name(device);
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//! \todo (LOW) admin enable/disable of port
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data_.set_is_enabled(true);
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data_.set_is_exclusive_control(false);
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isSendQueueDirty_ = false;
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rateAccuracy_ = kHighAccuracy;
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linkState_ = OstProto::LinkStateUnknown;
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minPacketSetSize_ = 1;
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deviceManager_ = new DeviceManager(this);
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maxStatsValue_ = ULLONG_MAX; // assume 64-bit stats
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memset((void*) &stats_, 0, sizeof(stats_));
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resetStats();
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}
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AbstractPort::~AbstractPort()
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{
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delete deviceManager_;
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}
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void AbstractPort::init()
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{
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}
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/*! Can we modify Port with these params? Should modify cause port dirty? */
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bool AbstractPort::canModify(const OstProto::Port &port, bool *dirty)
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{
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bool allow = true;
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*dirty = false;
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if (port.has_transmit_mode()
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&& (port.transmit_mode() != data_.transmit_mode())) {
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*dirty = true;
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allow = !isTransmitOn();
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}
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if (port.has_track_stream_stats()
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&& (port.track_stream_stats() != data_.track_stream_stats())) {
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*dirty = true;
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allow = !isTransmitOn();
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}
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return allow;
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}
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bool AbstractPort::modify(const OstProto::Port &port)
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{
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bool ret = true;
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//! \todo Use reflection to find out which fields are set
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if (port.has_is_exclusive_control())
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{
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bool val = port.is_exclusive_control();
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ret = setExclusiveControl(val);
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if (ret)
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data_.set_is_exclusive_control(val);
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}
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if (port.has_transmit_mode())
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data_.set_transmit_mode(port.transmit_mode());
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if (port.has_track_stream_stats())
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setTrackStreamStats(port.track_stream_stats());
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if (port.has_user_name()) {
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data_.set_user_name(port.user_name());
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}
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if (port.has_track_stream_stats()) {
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bool val = port.track_stream_stats() ?
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startStreamStatsTracking() : stopStreamStatsTracking();
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if (val)
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data_.set_track_stream_stats(port.track_stream_stats());
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ret |= val;
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}
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return ret;
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}
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DeviceManager* AbstractPort::deviceManager()
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{
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return deviceManager_;
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}
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StreamBase* AbstractPort::streamAtIndex(int index)
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{
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Q_ASSERT(index < streamList_.size());
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return streamList_.at(index);
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}
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StreamBase* AbstractPort::stream(int streamId)
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{
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for (int i = 0; i < streamList_.size(); i++)
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{
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if ((uint)streamId == streamList_.at(i)->id())
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return streamList_.at(i);
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}
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return NULL;
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}
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bool AbstractPort::addStream(StreamBase *stream)
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{
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streamList_.append(stream);
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isSendQueueDirty_ = true;
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return true;
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}
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bool AbstractPort::deleteStream(int streamId)
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{
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for (int i = 0; i < streamList_.size(); i++)
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{
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StreamBase *stream;
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if ((uint)streamId == streamList_.at(i)->id())
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{
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stream = streamList_.takeAt(i);
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delete stream;
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isSendQueueDirty_ = true;
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return true;
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}
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}
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return false;
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}
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void AbstractPort::addNote(QString note)
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{
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QString notes = QString::fromStdString(data_.notes());
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note.prepend("<li>");
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note.append("</li>");
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if (notes.isEmpty())
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notes="<b>Limitation(s)</b><ul>";
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else
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notes.remove("</ul>");
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notes.append(note);
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notes.append("</ul>");
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data_.set_notes(notes.toStdString());
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}
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bool AbstractPort::setTrackStreamStats(bool enable)
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{
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data_.set_track_stream_stats(enable);
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}
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AbstractPort::Accuracy AbstractPort::rateAccuracy()
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{
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return rateAccuracy_;
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}
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bool AbstractPort::setRateAccuracy(Accuracy accuracy)
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{
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rateAccuracy_ = accuracy;
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return true;
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}
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void AbstractPort::updatePacketList()
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{
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switch(data_.transmit_mode())
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{
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case OstProto::kSequentialTransmit:
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updatePacketListSequential();
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break;
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case OstProto::kInterleavedTransmit:
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updatePacketListInterleaved();
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break;
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default:
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Q_ASSERT(false); // Unreachable!!!
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break;
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}
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}
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void AbstractPort::updatePacketListSequential()
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{
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long sec = 0;
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long nsec = 0;
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qDebug("In %s", __FUNCTION__);
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// First sort the streams by ordinalValue
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qSort(streamList_.begin(), streamList_.end(), StreamBase::StreamLessThan);
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clearPacketList();
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for (int i = 0; i < streamList_.size(); i++)
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{
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if (streamList_[i]->isEnabled())
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{
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int len = 0;
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ulong n, x, y;
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ulong burstSize;
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double ibg = 0;
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quint64 ibg1 = 0, ibg2 = 0;
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quint64 nb1 = 0, nb2 = 0;
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double ipg = 0;
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quint64 ipg1 = 0, ipg2 = 0;
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quint64 npx1 = 0, npx2 = 0;
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quint64 npy1 = 0, npy2 = 0;
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quint64 loopDelay;
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ulong frameVariableCount = streamList_[i]->frameVariableCount();
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// We derive n, x, y such that
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// n * x + y = total number of packets to be sent
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switch (streamList_[i]->sendUnit())
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{
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case OstProto::StreamControl::e_su_bursts:
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burstSize = streamList_[i]->burstSize();
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x = AbstractProtocol::lcm(frameVariableCount, burstSize);
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n = ulong(burstSize * streamList_[i]->numBursts()) / x;
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y = ulong(burstSize * streamList_[i]->numBursts()) % x;
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if (streamList_[i]->burstRate() > 0)
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{
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ibg = 1e9/double(streamList_[i]->burstRate());
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ibg1 = quint64(ceil(ibg));
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ibg2 = quint64(floor(ibg));
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nb1 = quint64((ibg - double(ibg2)) * double(x));
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nb2 = x - nb1;
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}
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loopDelay = ibg2;
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break;
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case OstProto::StreamControl::e_su_packets:
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x = frameVariableCount;
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n = 2;
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while (x < minPacketSetSize_)
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x = frameVariableCount*n++;
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n = streamList_[i]->numPackets() / x;
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y = streamList_[i]->numPackets() % x;
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burstSize = x + y;
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if (streamList_[i]->packetRate() > 0)
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{
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ipg = 1e9/double(streamList_[i]->packetRate());
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ipg1 = quint64(ceil(ipg));
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ipg2 = quint64(floor(ipg));
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npx1 = quint64((ipg - double(ipg2)) * double(x));
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npx2 = x - npx1;
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npy1 = quint64((ipg - double(ipg2)) * double(y));
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npy2 = y - npy1;
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}
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loopDelay = ipg2;
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break;
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default:
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qWarning("Unhandled stream control unit %d",
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streamList_[i]->sendUnit());
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continue;
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}
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qDebug("\nframeVariableCount = %lu", frameVariableCount);
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qDebug("n = %lu, x = %lu, y = %lu, burstSize = %lu",
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n, x, y, burstSize);
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qDebug("ibg = %g", ibg);
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qDebug("ibg1 = %" PRIu64, ibg1);
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qDebug("nb1 = %" PRIu64, nb1);
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qDebug("ibg2 = %" PRIu64, ibg2);
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qDebug("nb2 = %" PRIu64 "\n", nb2);
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qDebug("ipg = %g", ipg);
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qDebug("ipg1 = %" PRIu64, ipg1);
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qDebug("npx1 = %" PRIu64, npx1);
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qDebug("npy1 = %" PRIu64, npy1);
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qDebug("ipg2 = %" PRIu64, ipg2);
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qDebug("npx2 = %" PRIu64, npx2);
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qDebug("npy2 = %" PRIu64 "\n", npy2);
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if (n > 1)
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loopNextPacketSet(x, n, 0, loopDelay);
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else if (n == 0)
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x = 0;
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for (uint j = 0; j < (x+y); j++)
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{
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if (j == 0 || frameVariableCount > 1)
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{
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len = streamList_[i]->frameValue(
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pktBuf_, sizeof(pktBuf_), j);
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}
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if (len <= 0)
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continue;
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qDebug("q(%d, %d) sec = %lu nsec = %lu",
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i, j, sec, nsec);
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appendToPacketList(sec, nsec, pktBuf_, len);
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if ((j > 0) && (((j+1) % burstSize) == 0))
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{
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nsec += (j < nb1) ? ibg1 : ibg2;
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while (nsec >= long(1e9))
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{
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sec++;
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nsec -= long(1e9);
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}
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}
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else
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{
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if (j < x)
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nsec += (j < npx1) ? ipg1 : ipg2;
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else
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nsec += ((j-x) < npy1) ? ipg1 : ipg2;
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while (nsec >= long(1e9))
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{
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sec++;
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nsec -= long(1e9);
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}
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}
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}
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switch(streamList_[i]->nextWhat())
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{
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case ::OstProto::StreamControl::e_nw_stop:
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goto _stop_no_more_pkts;
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case ::OstProto::StreamControl::e_nw_goto_id:
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/*! \todo (MED): define and use
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streamList_[i].d.control().goto_stream_id(); */
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/*! \todo (MED): assumes goto Id is less than current!!!!
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To support goto to any id, do
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if goto_id > curr_id then
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i = goto_id;
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goto restart;
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else
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returnToQIdx = 0;
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*/
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setPacketListLoopMode(true, 0,
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streamList_[i]->sendUnit() ==
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StreamBase::e_su_bursts ? ibg1 : ipg1);
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goto _stop_no_more_pkts;
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case ::OstProto::StreamControl::e_nw_goto_next:
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break;
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default:
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qFatal("---------- %s: Unhandled case (%d) -----------",
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__FUNCTION__, streamList_[i]->nextWhat() );
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break;
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}
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} // if (stream is enabled)
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} // for (numStreams)
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_stop_no_more_pkts:
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isSendQueueDirty_ = false;
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}
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void AbstractPort::updatePacketListInterleaved()
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{
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int numStreams = 0;
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quint64 minGap = ULLONG_MAX;
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quint64 duration = quint64(1e9);
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QList<quint64> ibg1, ibg2;
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QList<quint64> nb1, nb2;
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QList<quint64> ipg1, ipg2;
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QList<quint64> np1, np2;
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QList<ulong> schedSec, schedNsec;
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QList<ulong> pktCount, burstCount;
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QList<ulong> burstSize;
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QList<bool> isVariable;
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QList<QByteArray> pktBuf;
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QList<ulong> pktLen;
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qDebug("In %s", __FUNCTION__);
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// First sort the streams by ordinalValue
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qSort(streamList_.begin(), streamList_.end(), StreamBase::StreamLessThan);
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clearPacketList();
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for (int i = 0; i < streamList_.size(); i++)
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{
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if (!streamList_[i]->isEnabled())
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continue;
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double numBursts = 0;
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double numPackets = 0;
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quint64 _burstSize = 0;
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double ibg = 0;
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quint64 _ibg1 = 0, _ibg2 = 0;
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quint64 _nb1 = 0, _nb2 = 0;
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double ipg = 0;
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quint64 _ipg1 = 0, _ipg2 = 0;
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quint64 _np1 = 0, _np2 = 0;
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switch (streamList_[i]->sendUnit())
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{
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case OstProto::StreamControl::e_su_bursts:
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numBursts = streamList_[i]->burstRate();
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if (streamList_[i]->burstRate() > 0)
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{
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ibg = 1e9/double(streamList_[i]->burstRate());
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_ibg1 = quint64(ceil(ibg));
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_ibg2 = quint64(floor(ibg));
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_nb1 = quint64((ibg - double(_ibg2)) * double(numBursts));
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_nb2 = quint64(numBursts) - _nb1;
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_burstSize = streamList_[i]->burstSize();
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}
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break;
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case OstProto::StreamControl::e_su_packets:
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numPackets = streamList_[i]->packetRate();
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if (streamList_[i]->packetRate() > 0)
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{
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ipg = 1e9/double(streamList_[i]->packetRate());
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_ipg1 = llrint(ceil(ipg));
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_ipg2 = quint64(floor(ipg));
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_np1 = quint64((ipg - double(_ipg2)) * double(numPackets));
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_np2 = quint64(numPackets) - _np1;
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_burstSize = 1;
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}
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break;
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default:
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qWarning("Unhandled stream control unit %d",
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streamList_[i]->sendUnit());
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continue;
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}
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qDebug("numBursts = %g, numPackets = %g\n", numBursts, numPackets);
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qDebug("ibg = %g", ibg);
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qDebug("ibg1 = %" PRIu64, _ibg1);
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qDebug("nb1 = %" PRIu64, _nb1);
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qDebug("ibg2 = %" PRIu64, _ibg2);
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qDebug("nb2 = %" PRIu64 "\n", _nb2);
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qDebug("ipg = %g", ipg);
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qDebug("ipg1 = %" PRIu64, _ipg1);
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qDebug("np1 = %" PRIu64, _np1);
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qDebug("ipg2 = %" PRIu64, _ipg2);
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qDebug("np2 = %" PRIu64 "\n", _np2);
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if (_ibg2 && (_ibg2 < minGap))
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minGap = _ibg2;
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if (_ibg1 && (_ibg1 > duration))
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duration = _ibg1;
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ibg1.append(_ibg1);
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ibg2.append(_ibg2);
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nb1.append(_nb1);
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nb2.append(_nb1);
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burstSize.append(_burstSize);
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if (_ipg2 && (_ipg2 < minGap))
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minGap = _ipg2;
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if (_np1)
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{
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if (_ipg1 && (_ipg1 > duration))
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duration = _ipg1;
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}
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else
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{
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if (_ipg2 && (_ipg2 > duration))
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duration = _ipg2;
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}
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ipg1.append(_ipg1);
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ipg2.append(_ipg2);
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np1.append(_np1);
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np2.append(_np1);
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schedSec.append(0);
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schedNsec.append(0);
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pktCount.append(0);
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burstCount.append(0);
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if (streamList_[i]->isFrameVariable())
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{
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isVariable.append(true);
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pktBuf.append(QByteArray());
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pktLen.append(0);
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}
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else
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{
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isVariable.append(false);
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pktBuf.append(QByteArray());
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pktBuf.last().resize(kMaxPktSize);
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pktLen.append(streamList_[i]->frameValue(
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(uchar*)pktBuf.last().data(), pktBuf.last().size(), 0));
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}
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numStreams++;
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} // for i
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qDebug("minGap = %" PRIu64, minGap);
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qDebug("duration = %" PRIu64, duration);
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|
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uchar* buf;
|
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int len;
|
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quint64 durSec = duration/ulong(1e9);
|
|
quint64 durNsec = duration % ulong(1e9);
|
|
quint64 sec = 0;
|
|
quint64 nsec = 0;
|
|
quint64 lastPktTxSec = 0;
|
|
quint64 lastPktTxNsec = 0;
|
|
do
|
|
{
|
|
for (int i = 0; i < numStreams; i++)
|
|
{
|
|
// If a packet is not scheduled yet, look at the next stream
|
|
if ((schedSec.at(i) > sec) || (schedNsec.at(i) > nsec))
|
|
continue;
|
|
|
|
for (uint j = 0; j < burstSize[i]; j++)
|
|
{
|
|
if (isVariable.at(i))
|
|
{
|
|
buf = pktBuf_;
|
|
len = streamList_[i]->frameValue(pktBuf_, sizeof(pktBuf_),
|
|
pktCount[i]);
|
|
}
|
|
else
|
|
{
|
|
buf = (uchar*) pktBuf.at(i).data();
|
|
len = pktLen.at(i);
|
|
}
|
|
|
|
if (len <= 0)
|
|
continue;
|
|
|
|
qDebug("q(%d) sec = %" PRIu64 " nsec = %" PRIu64, i, sec, nsec);
|
|
appendToPacketList(sec, nsec, buf, len);
|
|
lastPktTxSec = sec;
|
|
lastPktTxNsec = nsec;
|
|
|
|
pktCount[i]++;
|
|
schedNsec[i] += (pktCount.at(i) < np1.at(i)) ?
|
|
ipg1.at(i) : ipg2.at(i);
|
|
while (schedNsec.at(i) >= 1e9)
|
|
{
|
|
schedSec[i]++;
|
|
schedNsec[i] -= long(1e9);
|
|
}
|
|
}
|
|
|
|
burstCount[i]++;
|
|
schedNsec[i] += (burstCount.at(i) < nb1.at(i)) ?
|
|
ibg1.at(i) : ibg2.at(i);
|
|
while (schedNsec.at(i) >= 1e9)
|
|
{
|
|
schedSec[i]++;
|
|
schedNsec[i] -= long(1e9);
|
|
}
|
|
}
|
|
|
|
nsec += minGap;
|
|
while (nsec >= 1e9)
|
|
{
|
|
sec++;
|
|
nsec -= long(1e9);
|
|
}
|
|
} while ((sec < durSec) || (nsec < durNsec));
|
|
|
|
qint64 delaySec = durSec - lastPktTxSec;
|
|
qint64 delayNsec = durNsec - lastPktTxNsec;
|
|
while (delayNsec < 0)
|
|
{
|
|
delayNsec += long(1e9);
|
|
delaySec--;
|
|
}
|
|
qDebug("loop Delay = %" PRId64 "/%" PRId64, delaySec, delayNsec);
|
|
setPacketListLoopMode(true, delaySec, delayNsec);
|
|
isSendQueueDirty_ = false;
|
|
}
|
|
|
|
void AbstractPort::stats(PortStats *stats)
|
|
{
|
|
stats->rxPkts = (stats_.rxPkts >= epochStats_.rxPkts) ?
|
|
stats_.rxPkts - epochStats_.rxPkts :
|
|
stats_.rxPkts + (maxStatsValue_ - epochStats_.rxPkts);
|
|
stats->rxBytes = (stats_.rxBytes >= epochStats_.rxBytes) ?
|
|
stats_.rxBytes - epochStats_.rxBytes :
|
|
stats_.rxBytes + (maxStatsValue_ - epochStats_.rxBytes);
|
|
stats->rxPps = stats_.rxPps;
|
|
stats->rxBps = stats_.rxBps;
|
|
|
|
stats->txPkts = (stats_.txPkts >= epochStats_.txPkts) ?
|
|
stats_.txPkts - epochStats_.txPkts :
|
|
stats_.txPkts + (maxStatsValue_ - epochStats_.txPkts);
|
|
stats->txBytes = (stats_.txBytes >= epochStats_.txBytes) ?
|
|
stats_.txBytes - epochStats_.txBytes :
|
|
stats_.txBytes + (maxStatsValue_ - epochStats_.txBytes);
|
|
stats->txPps = stats_.txPps;
|
|
stats->txBps = stats_.txBps;
|
|
|
|
stats->rxDrops = (stats_.rxDrops >= epochStats_.rxDrops) ?
|
|
stats_.rxDrops - epochStats_.rxDrops :
|
|
stats_.rxDrops + (maxStatsValue_ - epochStats_.rxDrops);
|
|
stats->rxErrors = (stats_.rxErrors >= epochStats_.rxErrors) ?
|
|
stats_.rxErrors - epochStats_.rxErrors :
|
|
stats_.rxErrors + (maxStatsValue_ - epochStats_.rxErrors);
|
|
stats->rxFifoErrors = (stats_.rxFifoErrors >= epochStats_.rxFifoErrors) ?
|
|
stats_.rxFifoErrors - epochStats_.rxFifoErrors :
|
|
stats_.rxFifoErrors + (maxStatsValue_ - epochStats_.rxFifoErrors);
|
|
stats->rxFrameErrors = (stats_.rxFrameErrors >= epochStats_.rxFrameErrors) ?
|
|
stats_.rxFrameErrors - epochStats_.rxFrameErrors :
|
|
stats_.rxFrameErrors + (maxStatsValue_ - epochStats_.rxFrameErrors);
|
|
}
|
|
|
|
void AbstractPort::streamStats(uint guid, OstProto::StreamStatsList *stats)
|
|
{
|
|
if (streamStats_.contains(guid))
|
|
{
|
|
StreamStatsTuple sst = streamStats_.value(guid);
|
|
OstProto::StreamStats *s = stats->add_stream_stats();
|
|
|
|
s->mutable_stream_guid()->set_id(guid);
|
|
s->mutable_port_id()->set_id(id());
|
|
|
|
s->set_tx_pkts(sst.tx_pkts);
|
|
s->set_tx_bytes(sst.tx_bytes);
|
|
s->set_rx_pkts(sst.rx_pkts);
|
|
s->set_rx_bytes(sst.rx_bytes);
|
|
}
|
|
}
|
|
|
|
void AbstractPort::streamStatsAll(OstProto::StreamStatsList *stats)
|
|
{
|
|
// FIXME: change input param to a non-OstProto type and/or have
|
|
// a getFirst/Next like API?
|
|
StreamStatsIterator i(streamStats_);
|
|
while (i.hasNext())
|
|
{
|
|
i.next();
|
|
StreamStatsTuple sst = i.value();
|
|
OstProto::StreamStats *s = stats->add_stream_stats();
|
|
|
|
s->mutable_stream_guid()->set_id(i.key());
|
|
s->mutable_port_id()->set_id(id());
|
|
|
|
s->set_tx_pkts(sst.tx_pkts);
|
|
s->set_tx_bytes(sst.tx_bytes);
|
|
s->set_rx_pkts(sst.rx_pkts);
|
|
s->set_rx_bytes(sst.rx_bytes);
|
|
}
|
|
}
|
|
|
|
void AbstractPort::resetStreamStats(uint guid)
|
|
{
|
|
streamStats_.remove(guid);
|
|
}
|
|
|
|
void AbstractPort::resetStreamStatsAll()
|
|
{
|
|
streamStats_.clear();
|
|
}
|
|
|
|
void AbstractPort::clearDeviceNeighbors()
|
|
{
|
|
deviceManager_->clearDeviceNeighbors();
|
|
isSendQueueDirty_ = true;
|
|
}
|
|
|
|
void AbstractPort::resolveDeviceNeighbors()
|
|
{
|
|
// For a user triggered 'Resolve Neighbors', the behaviour we want is
|
|
// IP not in cache - send ARP/NDP request
|
|
// IP present in cache, but unresolved - re-send ARP/NDP request
|
|
// IP present in cache and resolved - don't sent ARP/NDP
|
|
//
|
|
// Device does not resend ARP/NDP requests if the IP address is
|
|
// already present in the cache, irrespective of whether it is
|
|
// resolved or not (this is done to avoid sending duplicate requests).
|
|
//
|
|
// So, to get the behaviour we want, let's clear all unresolved neighbors
|
|
// before calling resolve
|
|
deviceManager_->clearDeviceNeighbors(Device::kUnresolvedNeighbors);
|
|
|
|
// Resolve gateway for each device first ...
|
|
deviceManager_->resolveDeviceGateways();
|
|
|
|
// ... then resolve neighbor for each unique frame of each stream
|
|
// NOTE:
|
|
// 1. All the frames may have the same destination ip,but may have
|
|
// different source ip so may belong to a different emulated device;
|
|
// so we cannot optimize and send only one ARP
|
|
// 2. For a unidirectional stream, at egress, this will create ARP
|
|
// entries on the DUT for each of the source addresses
|
|
//
|
|
// TODO(optimization): Identify if stream does not vary in srcIp or dstIp
|
|
// - in which case resolve for only one frame of the stream
|
|
for (int i = 0; i < streamList_.size(); i++)
|
|
{
|
|
const StreamBase *stream = streamList_.at(i);
|
|
int frameCount = stream->frameVariableCount();
|
|
|
|
for (int j = 0; j < frameCount; j++) {
|
|
// we need the packet contents only uptil the L3 header
|
|
int pktLen = stream->frameValue(pktBuf_, kMaxL3PktSize, j);
|
|
if (pktLen) {
|
|
PacketBuffer pktBuf(pktBuf_, pktLen);
|
|
deviceManager_->resolveDeviceNeighbor(&pktBuf);
|
|
}
|
|
}
|
|
}
|
|
isSendQueueDirty_ = true;
|
|
}
|
|
|
|
quint64 AbstractPort::deviceMacAddress(int streamId, int frameIndex)
|
|
{
|
|
// we need the packet contents only uptil the L3 header
|
|
StreamBase *s = stream(streamId);
|
|
int pktLen = s->frameValue(pktBuf_, kMaxL3PktSize, frameIndex);
|
|
|
|
if (pktLen) {
|
|
PacketBuffer pktBuf(pktBuf_, pktLen);
|
|
return deviceManager_->deviceMacAddress(&pktBuf);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
quint64 AbstractPort::neighborMacAddress(int streamId, int frameIndex)
|
|
{
|
|
// we need the packet contents only uptil the L3 header
|
|
StreamBase *s = stream(streamId);
|
|
int pktLen = s->frameValue(pktBuf_, kMaxL3PktSize, frameIndex);
|
|
|
|
if (pktLen) {
|
|
PacketBuffer pktBuf(pktBuf_, pktLen);
|
|
return deviceManager_->neighborMacAddress(&pktBuf);
|
|
}
|
|
|
|
return 0;
|
|
}
|