[[TOC]]

This page is intended to give a short overview on known issues and to provide potential solutions and workarounds to the issues seen.

To stay informed, please refer to the [wiki:Public/User_Guide/News News page]. Also, please pay attention to the information contained in the "Message of the day" displayed when logging onto the system. 

== Detected HW and node issues ==

=== CM nodes ===

* dp-cn33: node still offline after memory issues (#2338)  
* dp-cn49 and dp-cn50: nodes currently reserved for special use case

=== DAM nodes ===

* dp-dam03: being investigated after unexptected reboot (#2323)
* dp-dam07: showing problems with its FPGA (#2353)
* dp-dam08: issues with second socket CPU seen (#2304)

=== ESB nodes ===

* dp-esb08: GPU shows PCIe x8 connection only (#2370)
* dp-esb11: no GPU device detected, under repair (#2358)
* dp-esb23: MCE problems (#2350)


== Software issues ==

=== GPU direct usage with IB on ESB ===

- currently only available via Developer stage, for testing load:

{{{
module --force purge
module use $OTHERSTAGES
module load Stages/Devel-2019a
module load GCC/8.3.0 or module load Intel
module load ParaStationMPI
}}}

- use `PSP_CUDA=1` and `PSP_UCP=1`

=== GPU direct usage with Extoll on DAM ===

- new Extoll driver for GPU direct over Extoll currently being tested on the DAM nodes
- only available via Developer stage, for testing load:

{{{
module --force purge
module use $OTHERSTAGES
module load Stages/Devel-2019a
module load GCC/8.3.0 or module load Intel
module load ParaStationMPI
}}}

- expect performance and stability issues

=== slurmtop ===

The `slurmtop`tool is not working properly, a workaround is to call it via

{{{
slurmtop 2> /dev/null
}}}