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ZIH
hpcsupport
hpc-compendium
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a77262b0
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a77262b0
authored
3 years ago
by
Taras Lazariv
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vorschlag für HW-Steckbrief
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doc.zih.tu-dresden.de/docs/jobs_and_resources/rome_nodes.md
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a77262b0
...
@@ -16,9 +16,9 @@ node. SMT is also active, so in total, 256 logical cores are available
...
@@ -16,9 +16,9 @@ node. SMT is also active, so in total, 256 logical cores are available
per node.
per node.
!!! note
!!! note
Multithreading is disabled per default in a job. To make use of it
Multithreading is disabled per default in a job. To make use of it
include the Slurm parameter
`--hint=multithread`
in your job script
include the Slurm parameter
`--hint=multithread`
in your job script
or command line, or set
or command line, or set
the environment variable
`SLURM_HINT=multithread`
before job submission.
the environment variable
`SLURM_HINT=multithread`
before job submission.
Each node brings 512 GB of main memory, so you can request roughly
Each node brings 512 GB of main memory, so you can request roughly
...
@@ -40,7 +40,7 @@ certain module is available on rome architecture.
...
@@ -40,7 +40,7 @@ certain module is available on rome architecture.
## Example, running CP2K on Rome
## Example, running CP2K on Rome
First, check what CP2K modules are available in general:
First, check what CP2K modules are available in general:
`m
l
spider CP2K`
or
`m
l
avail CP2K`
.
`m
odule load
spider CP2K`
or
`m
odule
avail CP2K`
.
You will see that there are several different CP2K versions avail, built
You will see that there are several different CP2K versions avail, built
with different toolchains. Now let's assume you have to decided you want
with different toolchains. Now let's assume you have to decided you want
...
@@ -87,7 +87,7 @@ export MKL_DEBUG_CPU_TYPE=5
...
@@ -87,7 +87,7 @@ export MKL_DEBUG_CPU_TYPE=5
```
```
Without it, the MKL does a CPUID check and disables AVX2/FMA on
Without it, the MKL does a CPUID check and disables AVX2/FMA on
non-Intel CPUs, leading to much worse performance.
non-Intel CPUs, leading to much worse performance.
!!! note
!!! note
In version 2020, Intel has removed this environment variable and added separate Zen
In version 2020, Intel has removed this environment variable and added separate Zen
codepaths to the library. However, they are still incomplete and do not
codepaths to the library. However, they are still incomplete and do not
...
@@ -117,4 +117,4 @@ best-performing code in every case on Rome. You might want to try
...
@@ -117,4 +117,4 @@ best-performing code in every case on Rome. You might want to try
We have seen only half the theoretical peak bandwidth via Infiniband
We have seen only half the theoretical peak bandwidth via Infiniband
between two nodes, whereas OpenMPI got close to the peak bandwidth, so
between two nodes, whereas OpenMPI got close to the peak bandwidth, so
you might want to avoid using Intel MPI on romeo if your application
you might want to avoid using Intel MPI on romeo if your application
heavily relies on MPI communication until this issue is resolved.
heavily relies on MPI communication until this issue is resolved.
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