# Cluster Nodes

All of the nodes on the cluster have hyper-threading disabled. This means that each core can only work on one thread at a time.

### Thing to consider about performance:

**Using all of the processors on a machine to their maximum capacity will certainly bring down the machine. You must leave resources for the OS and overhead.**

##### The processes/threads may also be

- CPU bound (needs lots of CPU resources)
- Memory bound (needs lots of RAM resources)
- I/O bound (Network and/or hard drive resources)

All of these three resources are finite and any one can limit the performance of a system. Users should consider which of these their particular program will be consuming. There will be a point where the performance of your multi-threaded processing could actually slow down with more threads. It could actually get significantly slower or even crash the node.

**Legacy Name from Hawk** | **Psych-o Name** | **# of CPUs** | **Cores Per CPU** | **Total Memory (GB)** |

| psycho-o.hpc1.cs.cmu.edu | 16 | 8 | 24.7 |

| compute-0-10 | 16 | 8 | 65.9 |

| compute-0-11 | 16 | 8 | 65.9 |

| compute-0-12 | 16 | 8 | 65.9 |

| compute-0-13 | 16 | 8 | 65.9 |

| compute-0-14 | 16 | 8 | 65.9 |

| compute-0-15 | 16 | 8 | 65.9 |

| compute-0-16 | 16 | 8 | 65.9 |

plaut-compute-0-1 | compute-0-25-1 | 12 | 6 | 24.7 |

plaut-compute-0-0 | compute-0-25-2 | 12 | 6 | 24.7 |

plaut-compute-0-3 | compute-0-27-1 | 12 | 6 | 49.5 |

plaut-compute-0-5 | compute-0-27-2 | 12 | 6 | 49.5 |

plaut-compute-0-2 | compute-0-29-1 | 12 | 6 | 24.7 |

plaut-compute-0-4 | compute-0-29-2 | 12 | 6 | 49.5 |

plaut-compute-0-6 | compute-0-31-1 | 12 | 6 | 24.7 |

cnbc-compute-0-1 | compute-0-31-2 | 12 | 6 | 99.1 |

cnbc-compute-0-5 | compute-0-33-1 | 12 | 6 | 99.1 |

cnbc-compute-0-6 | compute-0-33-2 | 12 | 6 | 99.1 |

cnbc-compute-0-0 | compute-0-35-1 | 12 | 6 | 49.5 |

cnbc-compute-0-2 | compute-0-35-2 | 12 | 6 | 99.2 |

cnbc-compute-0-3 | compute-0-37-1 | 12 | 6 | 49.5 |

cnbc-compute-0-4 | compute-0-37-2 | 12 | 6 | 99.1 |

dsi-compute-0-7 | compute-0-39-1 | 12 | 6 | 24.7 |

dsi-compute-0-8 | compute-0-39-2 | 12 | 6 | 24.7 |

| | | | |

Topic revision: r3 - 2015-09-18

- dpane