queue-monitor.h

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- 
 *
 * Copyright (c) 1997 Regents of the University of California.
 * All rights reserved.
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 *    notice, this list of conditions and the following disclaimer in the
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 *    must display the following acknowledgement:
 *      This product includes software developed by the MASH Research
 *      Group at the University of California Berkeley.
 * 4. Neither the name of the University nor of the Research Group may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 *
 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/tools/queue-monitor.h,v 1.24 2003/01/28 23:31:04 sfloyd Exp $ (UCB)
 */

#ifndef ns_queue_monitor_h
#define ns_queue_monitor_h

#include "config.h"  // for int64_t
#include "integrator.h"
#include "connector.h"
#include "packet.h"
#include "flags.h"

class QueueMonitor : public TclObject {
public: 
        QueueMonitor() : bytesInt_(NULL), pktsInt_(NULL), delaySamp_(NULL),
                size_(0), pkts_(0),
                parrivals_(0), barrivals_(0),
                pdepartures_(0), bdepartures_(0),
                pdrops_(0), pmarks_(0), bdrops_(0), 
                keepRTTstats_(0), maxRTT_(1), numRTTs_(0), binsPerSec_(10),
                keepSeqnoStats_(0), maxSeqno_(1000), 
                numSeqnos_(0), SeqnoBinSize_(1),
                k_(0.1), 
                srcId_(0), dstId_(0), channel_(0), channel1_(0),
                estimate_rate_(0), estRate_(0.0),
                temp_size_(0) {
                
                bind("size_", &size_);
                bind("pkts_", &pkts_);
                bind("parrivals_", &parrivals_);
                bind("barrivals_", &barrivals_);
                bind("pdepartures_", &pdepartures_);
                bind("bdepartures_", &bdepartures_);
                bind("pdrops_", &pdrops_);
                bind("pmarks_", &pmarks_);
                bind("bdrops_", &bdrops_);

                //for keeping RTT statistics
                bind_bool("keepRTTstats_", &keepRTTstats_);
                bind("maxRTT_", &maxRTT_);
                bind("binsPerSec_", &binsPerSec_);

                //for keeping sequence number statistics
                bind_bool("keepSeqnoStats_", &keepSeqnoStats_);
                bind("maxSeqno_", &maxSeqno_);
                bind("SeqnoBinSize_", &SeqnoBinSize_);

                //variable binding for flow rate estimation
                bind_bool("estimate_rate_", &estimate_rate_);
                bind("k_", &k_);
                bind("prevTime_", &prevTime_);
                bind("startTime_", &startTime_);
                bind("estRate_", &estRate_);
                
                startTime_ = Scheduler::instance().clock();
                prevTime_  = startTime_;
        };

        int size() const { return (size_); }
        int pkts() const { return (pkts_); }
#if defined(HAVE_INT64)
        int64_t parrivals() const { return (parrivals_); }      
        int64_t barrivals() const { return (barrivals_); }
        int64_t pdepartures() const { return (pdepartures_); }
        int64_t bdepartures() const { return (bdepartures_); }
#else /* no 64-bit integer */
        int parrivals() const { return (parrivals_); }
        int barrivals() const { return (barrivals_); }
        int pdepartures() const { return (pdepartures_); }
        int bdepartures() const { return (bdepartures_); }
#endif
        int pdrops() const { return (pdrops_); }
        int pmarks() const { return (pmarks_); }
        int bdrops() const { return (bdrops_); }
        void printRTTs();
        void printSeqnos();
        void printStats();
        virtual void in(Packet*);
        virtual void out(Packet*);
        virtual void drop(Packet*);
        virtual void edrop(Packet*) { abort(); }; // not here
        virtual int command(int argc, const char*const* argv);
protected:
        Integrator *bytesInt_;          // q-size integrator (bytes)
        Integrator *pktsInt_;           // q-size integrator (pkts)
        Samples* delaySamp_;            // stat samples of q delay
        int size_;                      // current queue size (bytes)
        int pkts_;                      // current queue size (packets)
        // aggregate counters bytes/packets
#if defined(HAVE_INT64)
        int64_t parrivals_;
        int64_t barrivals_;
        int64_t pdepartures_;
        int64_t bdepartures_;
#else /* no 64-bit integer */
        int parrivals_;
        int barrivals_;
        int pdepartures_;
        int bdepartures_;
#endif
        int pdrops_;
        int pmarks_;
        int bdrops_;

        int keepRTTstats_;              /* boolean - keeping RTT stats? */
        int maxRTT_;                    /* Max RTT to measure, in seconds */
        int numRTTs_;                   /* number of RTT measurements */
        int binsPerSec_;                /* number of bins per second */
        int *RTTbins_;                  /* Number of RTTs in each bin */

        int keepSeqnoStats_;            /* boolean - keeping Seqno stats? */
        int maxSeqno_;                  /* Max Seqno to measure */
        int numSeqnos_;                 /* number of Seqno measurements */
        int SeqnoBinSize_;              /* number of Seqnos per bin */
        int *SeqnoBins_;                /* Number of Seqnos in each bin */

        int srcId_;
        int dstId_;
        Tcl_Channel channel_;
        Tcl_Channel channel1_;

        // the estimation of incoming rate using an exponential averaging algorithm due to Stoica
        // hence a lot of this stuff is inspired by csfq.cc(Stoica)
        // put in here so that it can be used to estimate the arrival rate for both whole queues as 
        // well as flows (Flow inherits from EDQueueMonitor);
public:
        int estimate_rate_;           /* boolean - whether rate estimation is on or not */
        double k_;                    /* averaging interval for rate estimation in seconds*/
        double estRate_;              /* current flow's estimated rate in bps */
        double prevTime_;             /* time of last packet arrival */
        double startTime_;            /* time when the flow started */

protected:
        int temp_size_;               /* keep track of packets that arrive at the same time */

        void estimateRate(Packet *p);
        void keepRTTstats(Packet *p);
        void keepSeqnoStats(Packet *p);
};

class SnoopQueue : public Connector {
public: 
        SnoopQueue() : qm_(0) {}
        int command(int argc, const char*const* argv) {
                if (argc == 3) { 
                        if (strcmp(argv[1], "set-monitor") == 0) {
                                qm_ = (QueueMonitor*)
                                        TclObject::lookup(argv[2]);
                                if (qm_ == NULL)
                                        return (TCL_ERROR);
                                return (TCL_OK);
                        }
                }
                return (Connector::command(argc, argv));
        }
 protected:
        QueueMonitor* qm_;
};

class SnoopQueueIn : public SnoopQueue {
public:
        void recv(Packet* p, Handler* h) {
                qm_->in(p);
                send(p, h);
        }
};

class SnoopQueueOut : public SnoopQueue {
public:
        void recv(Packet* p, Handler* h) {
                qm_->out(p);
                send(p, h);
        }
};

class SnoopQueueDrop : public SnoopQueue {
public:
        void recv(Packet* p, Handler* h) {
                qm_->drop(p);
                send(p, h);
        }
};

/* Tagger, Like a normal FlowMonitor, use SnoopQueueTagger
 * to start it.
 * By Yun Wang 
 */
class SnoopQueueTagger : public SnoopQueue {
public:
        void recv(Packet* p, Handler* h) {
                qm_->in(p);
                send(p, h);
        }
};

/*
 * "early drop" QueueMonitor.  Like a normal QueueMonitor,
 * but also supports the notion of "early" drops
 */

/* 
 * The mon* things added to make it work with redpd. 
 * I tried more "elegant" ways -- but mulitple inheritance sucks !!.
 * -ratul
 */
class EDQueueMonitor : public QueueMonitor {
public:
        EDQueueMonitor() : ebdrops_(0), epdrops_(0), mon_ebdrops_(0), mon_epdrops_(0) {
                bind("ebdrops_", &ebdrops_);
                bind("epdrops_", &epdrops_);
                bind("mon_ebdrops_", &mon_ebdrops_);
                bind("mon_epdrops_", &mon_epdrops_);
        }
        void edrop(Packet* p) {
                hdr_cmn* hdr = hdr_cmn::access(p);
                ebdrops_ += hdr->size();
                epdrops_++;
                // remove later - ratul
                // printf("My epdrops = %d\n",epdrops_);
                QueueMonitor::drop(p);
        }
        
        void mon_edrop(Packet *p) {
                hdr_cmn* hdr = hdr_cmn::access(p);
                mon_ebdrops_ += hdr->size();
                mon_epdrops_++;
        
                QueueMonitor::drop(p);
        }
        
        int epdrops() const { return (epdrops_); }
        int ebdrops() const { return (ebdrops_); }
        int mon_epdrops() const { return (mon_epdrops_); }
        int mon_ebdrops() const { return (mon_ebdrops_); }
protected:
        int     ebdrops_;
        int     epdrops_;
        int     mon_ebdrops_;
        int     mon_epdrops_;
};

class SnoopQueueEDrop : public SnoopQueue {
public:
        void recv(Packet* p, Handler* h) {
                qm_->edrop(p);
                send(p, h);
        }
};


#ifndef MAXFLOW
#define MAXFLOW 32
#endif

/*
 * a 'QueueMonitorCompat', which is used by the compat
 * code to produce the link statistics available in ns-1
 */

class QueueMonitorCompat : public QueueMonitor {
public:
        QueueMonitorCompat();
        void in(Packet*);
        void out(Packet*);
        void drop(Packet*);
        int command(int argc, const char*const* argv);
protected:
        void    flowstats(int flowid);  /* create a flowstats structure */

        int     pkts_[MAXFLOW];
        int     bytes_[MAXFLOW];
        int     drops_[MAXFLOW];
        Samples *flowstats_[MAXFLOW];
};

#endif

---