A Discrete-Event Network Simulator
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dynamic-queue-limits.h
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1/*
2 * Copyright (c) 2016 Universita' degli Studi di Napoli Federico II
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 *
17 * Authors: Pasquale Imputato <p.imputato@gmail.com>
18 * Stefano Avallone <stefano.avallone@unina.it>
19 *
20 * This code is a port of the dynamic queue limits library implemented
21 * in the Linux kernel by
22 * Author: Tom Herbert <therbert@google.com>
23 */
24
25#ifndef DYNAMIC_QUEUE_LIMITS_H
26#define DYNAMIC_QUEUE_LIMITS_H
27
28#include "queue-limits.h"
29
30#include "ns3/nstime.h"
31#include "ns3/traced-value.h"
32
33#include <limits.h>
34
35namespace ns3
36{
37
66{
67 public:
72 static TypeId GetTypeId();
73
75 ~DynamicQueueLimits() override;
76
77 void Reset() override;
78 void Completed(uint32_t count) override;
79 int32_t Available() const override;
80 void Queued(uint32_t count) override;
81
82 private:
91
92 // Fields accessed in enqueue path
96
97 // Fields accessed only by completion path
100
104
105 uint32_t m_lowestSlack{std::numeric_limits<uint32_t>::max()};
107
108 // Configuration
112};
113
114} // namespace ns3
115
116#endif /* DYNAMIC_QUEUE_LIMITS_H */
DynamicQueueLimits would be used in conjunction with a producer/consumer type queue (possibly a netde...
uint32_t m_adjLimit
limit + num_completed
void Reset() override
Reset queue limits state.
uint32_t m_numCompleted
Total ever completed.
Time m_slackStartTime
Time slacks seen.
uint32_t m_numQueued
Total ever queued.
uint32_t m_prevOvlimit
Previous over limit.
uint32_t m_minLimit
Minimum limit.
Time m_slackHoldTime
Time to measure slack.
uint32_t m_prevNumQueued
Previous queue total.
uint32_t m_lastObjCnt
Count at last queuing.
uint32_t m_prevLastObjCnt
Previous queuing cnt.
static TypeId GetTypeId()
Get the type ID.
void Completed(uint32_t count) override
Record number of completed bytes and recalculate the limit.
int32_t Posdiff(int32_t a, int32_t b)
Calculates the difference between the two operators and returns the number if positive,...
uint32_t m_lowestSlack
Lowest slack found.
int32_t Available() const override
Available is called from NotifyTransmittedBytes to calculate the number of bytes that can be passed a...
TracedValue< uint32_t > m_limit
Current limit.
void Queued(uint32_t count) override
Record the number of bytes queued.
uint32_t m_maxLimit
Max limit.
Abstract base class for NetDevice queue length controller.
Definition: queue-limits.h:44
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:105
Trace classes with value semantics.
Definition: traced-value.h:116
a unique identifier for an interface.
Definition: type-id.h:59
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1326
Every class exported by the ns3 library is enclosed in the ns3 namespace.