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Idfreeze is a quad-socket machine equipped with AMD Opteron 6174 8 cores CPUs, totaling 48 core in a NUMA architecture.

  • 4x AMD Opteron 6174
  • 256 GB RAM

How to experiment

Privileged commands

Currently, the following commands can be run via sudo in exclusive jobs:

  • sudo /usr/bin/whoami (provided for testing the mechanism, should return "root")
  • sudo /sbin/reboot
  • sudo /usr/bin/schedtool
  • sudo /usr/bin/opcontrol
  • sudo /usr/bin/perf
  • sudo /opt/likwid/bin/likwid-perfctr
  • sudo /opt/likwid/bin/likwid-topology
  • sudo /usr/bin/nvidia-smi (please notify other users via the digitalis mailing list if you change parameters on GPUs that will not be reset to default after a reboot, e.g. the memory ECC configuration)
  • sudo /usr/local/bin/ipmi-reset
  • sudo /usr/bin/lstopo

System changelog

The operating system is based on Debian Squeeze.


System image
idfreeze-legacy 20130830

This is the operation system installed originally (except minor packages upgrade possibly) before the move of the machine from ID's DMZ to the Digitalis. Hence, the legacy name.

This system image is based on Debian Squeeze (old-stable).


  • BIOS upgraded
  • Kadeploy is now enabled


System image
  • fixed apt sources -> Squeeze is now old-stable, added Wheezy is stable (changed names to the distro nicknames)
  • added apt preferences -> Squeeze is kept as the preferred version
  • upgraded hwloc -> 1.8.1 (Jessie)
  • upgraded openmpi -> 1.6.5 (Jessie)
  • upgraded linux-image-3.2.0-4 (minor update, same version as earlier, from Wheezy)
  • set sysctl vm.zone_reclaim_mode = 3 (HPC mode)
  • added NFS mounts: /grid5000 and /applis
  • added links in /opt/intel/ to Intel Cluster Studio XE 2013.1 (icc 14)


The idfreeze machine was funded by the Mescal and Moais teams of LIG/Inria.

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