Cortex
Cortex is a server used by VisLab for development purposes (by contrast, the iCubBrain servers are used for demos).
Old information can be consulted at Cortex/Archive.
Specifications
Since summer 2012, there is one machine (cortex1) with these specs:
- 8 x i7-3770K @ 3.50GHz processor
- 16GB of memory (
sudo dmidecode --type 17
to see RAM speed and type) - 112GB SSD drive
- NVidia GeForce GTX 670 graphics card (CUDA)
Operating system installation
In general, follow the guidelines at VisLab machines configuration. Below are some special notes.
Additional software
On this cluster, each user should manage his own yarp2 and iCub repositories. As a result, do not use system-wide installation of those (): instead, simply use sudo make install
make
and set your environment variables.
(We could use system-wide yarp2 again after we verify that a user can easily override global settings.)
YARP and iCub
The yarp2 and iCub repositories are installed for user 'icub', similarly to iCubBrain server configuration.
Other libraries, manually installed
Please list here the system-wide libraries and applications that were installed by the superuser, especially the ones that do not have a clean 'make install' procedure but were manually installed into /opt
:
- ARToolKit
- Ipopt-3.5.5-linux-x86_32-gcc4.2.4
CMake 2.6 does not come with the version of Ubuntu currently installed, but it is needed by the latest version of yarp, so we installed it via this archive.
- cmake 2.6
Customization
Network tuning
sysctl -w net.core.rmem_max=8388608 sysctl -w net.core.wmem_max=8388608 sysctl -w net.core.rmem_default=65536 sysctl -w net.core.wmem_default=65536 sysctl -w net.ipv4.tcp_rmem='4096 87380 8388608' sysctl -w net.ipv4.tcp_wmem='4096 65536 8388608' sysctl -w net.ipv4.tcp_mem='8388608 8388608 8388608' sysctl -w net.ipv4.route.flush=1
Prompt ($PS1)
The prompt is set to user@cortex?:pwd$
in /etc/bash.bashrc
. With those settings, if you log in to Cortex1, the prompt will be user@cortex1:~$
.
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.
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.
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
:
# set a fancy prompt (non-color, unless we know we "want" color) case "$TERM" in xterm-color) PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' ;; *) PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ ' ;; esac
However, for users created after 2009-05-07, the prompt is already set to user@cortex?:pwd$
by default.
Mounting network folders
The folder "database" on BlackHole is mounted automatically to /media/blackhole. See /etc/fstab for details.