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| Cortex is a computation rack for VisLab humanoid robots. | | Cortex is a server used by VisLab for running simulations (not the ones with the iCub robot). |
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| = The Cluster =
| | ''Old information can be consulted at [[Cortex/Archive]].'' |
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| It contains 7 machines:
| | = Specifications = |
| * 1 server that manages startup, shutdown and the file system of the clients.
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| * 6 clients that run the user processes.
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| All clients mount the same file system. Therefore, performing changes in the file system of one of the clients will reflect to all others.
| | As of 2017, there is one machine (cortex1) with these specs: |
| | | * 8 x [http://ark.intel.com/products/65523/Intel-Core-i7-3770K-Processor-(8M-Cache-up-to-3_90-GHz) i7-3770K] @ 3.50GHz processor |
| = The Network =
| | * 16GB of memory (<code>sudo dmidecode --type 17</code> to see RAM speed and type) |
| | | * 112GB SSD drive + 1TB HDD drive |
| Cortex machines are at the vislab robotics network domain:
| | * NVidia [http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-670 GeForce GTX 670] graphics card (CUDA) |
| * Domain: visnet
| | * internal ISR IP address: 10.10.1.1 |
| * Subnet: 10.10.1.*
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| == Cortex nodes ==
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| Cortex server and clients have the following ip's and domain names:
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| * Server: 10.10.1.240, server.visnet
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| * Client 1: 10.10.1.1, cortex1.visnet
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| * Client 2: 10.10.1.2, cortex2.visnet
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| * Client 3: 10.10.1.3, cortex3.visnet
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| * Client 4: 10.10.1.4, cortex4.visnet
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| * Client 5: 10.10.1.5, cortex5.visnet
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| * Client 6: 10.10.1.6, cortex6.visnet
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| == Other nodes ==
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| Other assigned ip's and names are:
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| * Gateway: 10.10.1.254, gtisr.visnet
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| * Cortex Switch: 10.10.1.250, swcompurack.visnet
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| * Vislab Switch: 10.10.1.251, swvislab.visnet
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| * DHCP Range: 10.10.1.100-199
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| * Chico Net: 10.10.1.50-59
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| * Chica Net: 10.10.1.60-69
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| * Balta Net: 10.10.1.70-79
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| == Connectivity ==
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| Cortex machines are connected to Cortex Switch, that links to Vislab switch with a fiber optic connection of 4Gb/s.
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| == Traffic ==
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| Network traffic can be checked at:
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| * http://inode1.isrnet/cacti (user guest, pass guest) | |
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| = The Cortex Server =
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| The server has:
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| * Boot folder for the clients at /tftpboot/pxelinux.cfg. Contains the files:
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| ** default - default boot file
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| ** <mac_address> - specific for a machine with the given mac address.
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| * startup scripts for each machine at /nfsroot/app
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| = The Cortex Clients =
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| == Configuration ==
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| The clients have:
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| * A superuser account (compurack) to administer system wide settings (configurations, libs, etc)
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| * Normal user accounts. The logon script runs by default the content of file $HOME/.bash_env, where users can set their environment variables, e.g. export ICUB_DIR=$HOME/iCub.
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| * A yarp account to update and install the yarp library. YARP_DIR is set by default to /home/yarp/yarp2 to all users (in /etc/bash.bashrc).
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| = Global Libraries and Repositories =
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| == YARP ==
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| Yarp was set using the following commands (after logging in as yarp):
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| cvs -d:pserver:anonymous@yarp0.cvs.sourceforge.net:/cvsroot/yarp0 login
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| cvs -z3 -d:pserver:anonymous@yarp0.cvs.sourceforge.net:/cvsroot/yarp0 co -P yarp2
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| cd yarp2
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| cmake . (or ccmake .)
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| make
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| make test
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| == OTHER ==
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| Other system wide libraries/apps are installed by the superuser. Currently the following libraries are installed:
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| CURSES
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| apt-get install libncurses5-dev
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| ACE
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| apt-get install libace-dev
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| CMAKE
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| apt-get install cmake
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| GSL
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| apt-get install libgsl0-dev
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| GTK/GTKMM/GLADE
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| apt-get install libgtk2.0-dev
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| apt-get install libgtkmm-2.4-dev
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| apt-get install libglademm-2.4-dev
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| OPENCV
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| THE REPOSITORY IS NOW IN SVN FORM, WE NEED TO UPDATE THIS.
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| cvs -z3 -d:pserver:anonymous@opencvlibrary.cvs.sourceforge.net:/cvsroot/opencvlibrary co -P opencv
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| cd opencv
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| ./configure
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| make
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| make install
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| add /usr/local/lib to /etc/ld.so.conf
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| = User Repositories =
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| Each user should manage its own repositories, e.g. the iCub repository:
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| cvs -d vislab@cvs.robotcub.org:/cvsroot/robotcub co iCub
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| = Other configurations =
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| Tuning network:
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| sysctl -w net.core.rmem_max=8388608
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| sysctl -w net.core.wmem_max=8388608
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| sysctl -w net.core.rmem_default=65536
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| sysctl -w net.core.wmem_default=65536
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| sysctl -w net.ipv4.tcp_rmem='4096 87380 8388608'
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| sysctl -w net.ipv4.tcp_wmem='4096 65536 8388608'
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| sysctl -w net.ipv4.tcp_mem='8388608 8388608 8388608'
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| sysctl -w net.ipv4.route.flush=1
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| Prompt ($PS1):<br>
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| The prompt is set to "user@cortex?:pwd$" in /etc/bash.bashrc. With those settings, if you log in to Cortex1, the prompt will be "user@cortex1:~$".
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| We chose to do so because sometimes it's convenient to have the number of the Cortex machine you're working on embedded in the prompt.
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| By default, though, this configuration is overridden in the users' ~/.bashrc file, and the prompt is set to "user@source" regardless of the Cortex machine you log in to.<br>
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| If you want to inhibit this behaviour in ~/.bashrc and thus have a prompt like "user@cortex?:pwd", just comment these lines in your ~/.bashrc:
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| # set a fancy prompt (non-color, unless we know we "want" color)
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| case "$TERM" in
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| xterm-color)
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| PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
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| ;;
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| *)
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| PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
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| ;;
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| esac
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| However, for users created after 2009-05-07, the prompt is already set to "user@cortex?:pwd$" by default.
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| = Helper commands =
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| * Check the kernel : uname -m
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| * Check the file versions : file
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| * Set bash shell in /etc/passwd
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| * Check disk space: du –h –s /home
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| * Check per user processes: ps -U <user>
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| [[Category:Vislab]] | | [[Category:Vislab]] |