HPE Cray EX Architecture¶
Presenter: Harvey Richardson (HPE)
Archived materials on LUMI:
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Slides:
/appl/local/training/4day-20241028/files/LUMI-4day-20241028-1_01_HPE_Cray_EX_Architecture.pdf -
Recording:
/appl/local/training/4day-20241028/recordings/1_01_HPE_Cray_EX_Architecture.mp4
These materials can only be distributed to actual users of LUMI (active user account).
Q&A¶
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Numa node = processors connected to the same socket ?
- Not on AMD. There are 4 numa nodes in each socket as each socket is logically splitted in 4 quarters with really uniform memory access, but slightly longer delay to the other quarter. This is a BIOS setting though that is useful for HPC, but some AMD systems will be configured with one NUMA domain per socket (and a different but sligthly slower way of accessing memory)