- The Conversion from the linear address to physical address is done by a separate processor or a MMU
- In architecture Independent model, page conversion is a three level process which takes four steps
- 1st part is used as an index in the page directory which refers to the page middle directory
- 2nd part serves as an index to the page middle directory, there it refers to the page table
- 3rd Part used as an index to the page table, there it refers to the physical memory
- 4th Part of the address gives the offset within the selected page of memory.
- The x86 model supports a two level conversion of linear address to physical address.
- Highmem support helps upto physical memory size of 4GB being the address space of 32bit address, but Intel added four additional address pins to the Pentium Pro and created the physical address extension (PAE). Since the two level conversion supported only 32 bit addresses, the PAE has the control of supporting three level address conversion as in the Linux Architecture Independent Model.
This post shows how to install ns 3.34 in Ubuntu 20.04 LTS Prerequisites: Fresh installation of Ubuntu Version 20.04 LTS ns3.34 can be downloaded from here Follow the video link for complete step by step instructions on the installation. This version fixes the compilation issues of vanet-routing-compare.cc (bug in ns3.33) Issue the following commands after opening a terminal $ sudo apt update $ sudo apt install g++ python3 python3-dev python-dev pkg-config sqlite3 python3-setuptools git qt5-default 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 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev tcpdump wireshark libxml2 libxml2-dev Unzip or untar the ns-allinone-3.34.tar.bz2 in the home folder (in my case its /home/pradeepkumar) $ cd ns-allinone-3.34/ $ ./build.py --enable-examples --enable-tests Once the installation is completed, you may get an output show