Skip to main content

Installing ns-3.37 and ns-3.35 in Ubuntu | Ubuntu 22.04 | NS3

Multiple Versions of ns3 in Ubuntu 22.04 In this post, we are going to install two versions of ns3 namely ns-3.35 and ns-3.37  My OS is : Ubuntu 22.04 LTS (Long Term Support) ns-3.35 uses waf and (./waf --run scratch/first)  ns-3.37 uses cmake  (./ns3 run scratch/first.cc) So we will install both the packages  Go through the video for complete instructions To start with  $ sudo apt update  $ sudo apt install build-essential autoconf automake libxmu-dev g++ python3 python3-dev pkg-config sqlite3 cmake python3-setuptools git qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar gsl-bin libgsl-dev libgslcblas0 wireshark tcpdump sqlite sqlite3 libsqlite3-dev  libxml2 libxml2-dev libc6-dev libc6-dev-i386 libclang-dev llvm-dev automake python3-pip libxml2 libxml2-dev libboost-all-dev  I have downloaded both the versions of ns3 fr

Interrupt Servicing (Handling) Mechanism


Sources of Interrupts

  1. Software Error Related Sources:
    1. Overflow
    2. Underflow
    3. Division by zero
    4. Illegal opcode
    5. Programmer defined exceptions
  2. Software code related sources
    1. Breakpoint
    2. Debugging trap
    3. RTC driven software timer
    4. Input driven software timer
    5. Semaphore take and release
    6. Even related
    7. Task blocking overflow
    8. Task finished timeouts
  3. Internal Hardware device sources
    1. Parallel port and UART serial receiver port
    2. UART transmission complete
    3. ADC Start of conversion and End of Conversion
    4. Pulse Accumulator
    5. Real Time Clock
    6. Watch Dog Timer Reset
    7. Timer overflow on timeouts
  4. External Hardware with internal vector address
    1. Maskable pin
    2. Non Maskable pin
  5. External Hardware with external Vector Address
    1. INTR (Interrupt Request pin of 80x86


Context Switching

Context

A context of a program includes program counter and stack pointer. But in some special cases, the context also includes status word register and processor registers.


Context saving and restoring

Pushing all the register at the beginning of an interrupt routine is known as the context saving time and popping them at the end as restoring the context.


Questions: Can a microprocessor be interrupted in the middle of an instruction?

Ans: No, the microprocessor will complete the current instruction in which it is running, then only it will act on the interrupt signal.


Interrupt Latency


The amount of time it takes by a system to respond to an interrupt. There are lot of factors that affects the speediness of the latency. So to increase the latency speed,

1) Make the interrupt routine shorter

2) Disabling interrupts for a shorter duration,


Interrupt latency period (Tlat) is nothing but the sum of the following periods.

Tlat = Time taken for the response and initiating the ISR instructions + time needed to service all the interrupt of higher priorities than that of the present source + maximum period of disabling the interrupt services.









Step 1 – Main Program Running x – ISR1 call

Step 2 – ISR1 Running y - ISR1 Suspended, ISR2 (high Priority) call

Step 3 – ISR2 Running z – ISR2 gets CPU

Step 4 – Context Saving (ISR1) a – ISR2 Completed

Step 5 – Context Saving (ISR2) b – ISR1 running

Step 6 – Context restoring (ISR2) c – ISR1 completed

Step 7 – Context Restoring (ISR1)

Comments

Popular posts from this blog

Installation of NS2 (ns-2.35) in Ubuntu 20.04

Installation of NS2 (ns-2.35) in Ubuntu 20.04 LTS Step 1: Install the basic libraries like      $] sudo apt install build-essential autoconf automake libxmu-dev Step 2: install gcc-4.8 and g++-4.8 open the file using sudo mode $] sudo nano /etc/apt/sources.list Include the following line deb http://in.archive.ubuntu.com/ubuntu bionic main universe $] sudo apt update $] sudo apt install gcc-4.8 g++-4.8 Step 3:  Unzip the ns2 packages to home folder $] tar zxvf ns-allinone-2.35.tar.gz $] cd ns-allinone-2.35/ns-2.35 Modify the following make files. ~ns-2.35/Makefile.in Change @CC@ to gcc-4.8 change @CXX@ to g++-4.8 ~nam-1.15/Makefile.in ~xgraph-12.2/Makefile.in ~otcl-1.14/Makefile.in Change in all places  @CC@ to gcc-4.8 @CPP@ or @CXX@ to g++-4.8 open the file: ~ns-2.35/linkstate/ls.h Change at the Line no 137  void eraseAll() { erase(baseMap::begin(), baseMap::end()); } to This void eraseAll() { this->erase(baseMap::begin(), baseMap::end()); } All changes made Step 4: Open a new termi

Installing ns3 in Ubuntu 22.04 | Complete Instructions

In this post, we are going to see how to install ns-3.36.1 in Ubuntu 22.04. You can follow the video for complete details Tools used in this simulation: NS3 version ns-3.36.1  OS Used: Ubuntu 22.04 LTS Installation of NS3 (ns-3.36.1) There are some changes in the ns3 installation procedure and the dependencies. So open a terminal and issue the following commands Step 1:  Prerequisites $ sudo apt update In the following packages, all the required dependencies are taken care and you can install all these packages for the complete use of ns3. $ sudo apt install g++ python3 python3-dev pkg-config sqlite3 cmake python3-setuptools git qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar gsl-bin libgsl-dev libgslcblas0 wireshark tcpdump sqlite sqlite3 libsqlite3-dev  libxml2 libxml2-dev libc6-dev libc6-dev-i386 libclang-dev llvm-

VPL Jail Server Installation | Virtual Programming Laboratory with Moodle

Virtual Programming Laboratory (VPL)  This post tells you how to install VPL Jail Server Installation in Ubuntu 20.04 and how to configure it using Moodle Learning Management System. VPL - Virtual Programming Laboratory  For full installation with complete description, follow the video What is VPL? VPL is Virtual Programming Laboratory which is a tool for programming assignments, evaluation and running of programs. The programming languages supported by VPL is C, C++, Java, Python, Perl, PHP, NodeJS, Verilog, etc. Step 1 - Install  VPN Jail Server Installation  My Server configuration  16GB RAM and 16 Core PRocessor (Intel Xeon)  Virtual Machine  Ubuntu 20.04 (64 bit OS). To download the softwares  https://vpl.dis.ulpgc.es/index.php/home/download  Unzip or untar the above file in the home folder (in my case it is /home/tspradeepkumar/ ) $ cd vpl-jail-system-2.7.2/ $ sudo ./install-vpl-sh VPL Jail Server Installation This will take some time based on your internet connection: To Star