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Posts Tagged ‘Todi’

Call for Feedback on Proposed Additions to the OpenACC Standard

Tuesday, January 29th, 2013

OpenACC is a standard for directive-based accelerator programming, and it is available on CSCS systems such as Tödi and Castor.  The OpenACC Consortium is deciding on new features for the upcoming version of the standard — including support for unstructured data and nested parallelism. If you have interest in OpenACC, please take a look at the proposed additions to the standard and feel free to provide your feedback to us by February 1st.  As an OpenACC Consortium member, CSCS will bring your feedback into the discussion.

Click here for the direct link to the proposed additions on openacc.org.

CSCS Point of Contact:  Jeff Poznanovic (pjeffrey@cscs.ch)

Today Todi’s Maintenance from 7AM to 7PM

Thursday, August 16th, 2012

Today August 16th, Tödi is going to be under maintenance from 7:00 AM until 7:00 PM.

The system will be upgraded to the pre-release of SMW7.0, CLE4. 1 and Cuda5.0.

Be aware that you will need to recompile your applications for the  new environment. Find below a more detailed description of the upgrade.

Details Tödi Upgrade

custom output of ” apstat ”

users can parse the output of ” apstat ” the way they want with ” -f ” option i.e: apstat -no -f ” NID,Pl,Rv,Hw”

GPU support in CLE4.1:

* CUDA 5.0 API

*  Kernel Driver + CUDA library + CUDA Toolkit

*  GPU “Modes” exclusive, persistent

*  Simultaneous Execution contexts

. Only one CUDA context ( i,e MPI rank ) per node by default

. Multiple contexts support throught CUDA proxy

. set ENV variable CRAY-CUDA_PROXY=1 before aprun

. Limitations include debugging, profiling memory protection

. Feature support is evolving…..

*  Memory scrubbing

. Zero GPU memory between jobs

. Automatic, transparent

. Not delivered by NVIDIA as of Aug 01, 2012

. Expect in future update

 

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