---------------------------------------------------------------------- H H PPP CCC UK NATIONAL HPC SERVICE H H P P C C -------------------------- HHHHH PPP C x x provided by H H P C C xx EPCC and H H P CCC x x CCLRC Daresbury Laboratory ---------------------------------------------------------------------- HPCx User Mailing 063 11 March 2005 ---------------------------------------------------------------------- Contents ** TotalView: New version has Memory Debugging ** Course: Shared-Memory Programming with OpenMP ** Eleventh Annual Meeting of ScicomP: 31 May-3 June, Edinburgh ** Admin FAQ ** SC|05: Advance notice of service interruption ---------------------------------------------------------------------- Greetings-- TOTALVIEW: NEW VERSION HAS MEMORY DEBUGGING Totalview v6.5, which has now been installed on HPCx, has memory debugging facilities. These allow users to analyse the memory usage of their C, C++ or Fortran programs on HPCx via the view-based debugger. Users can flow through any debugging session with the memory debugger enabled, checking for leaks and tracking memory allocations and deallocations. For instructions on how to use this tool please refer to the 'Debugging Codes on HPCx' section of the Users' FAQ. Users' FAQ: http://www.hpcx.ac.uk/support/FAQ/ Running the TotalView Debugger: http://www.hpcx.ac.uk/support/FAQ/totalview/ Memory Debugging using Totalview: http://www.hpcx.ac.uk/support/FAQ/totalview/tv_mem_debug.html ---------------------------------------------------------------------- COURSE: SHARED-MEMORY PROGRAMMING WITH OPENMP Wednesday-Friday, 30 March - 1 April 2005, at EPCC, Edinburgh A significant number of parallel computers utilise a shared memory architecture: the HPCx system itself is built from a large number of 32-way shared-memory nodes. This course is primarily about how to effectively program these computers. After an introduction to the fundamental concepts of the shared variables model, the course focuses on the syntax and semantics of OpenMP, the industry standard for shared memory programming. Material is presented covering the potential performance issues and how to solve them, and real performance figures from HPCx. The topic of mixed-mode programming using both MPI and OpenMP in a single code is also covered. Hands-on programming makes up a significant, and integral, part of this course. There will be opportunities to discuss your own particular applications with HPCx staff members. The course will start at 10:00 on Wednesday 30th March and finish around lunchtime on Friday 1st April. To register for this course, please use the standard form: http://www.hpcx.ac.uk/support/training/form.html ---------------------------------------------------------------------- ELEVENTH ANNUAL MEETING OF SCICOMP 31 May - 3 June, Edinburgh ScicomP, the IBM Scientific System User Group, will be meeting this year in Edinburgh, hosted by EPCC. ScicomP meetings target computational scientists and engineers interested in achieving maximum performance and scalability on all of IBM's HPC platforms. This meeting will span the new and exciting range of IBM technologies including POWER architecture, Federation switch, BlueGene/L, and beyond. Presentations will be a balance of HPC users and the IBM R&D staff that produce and maintain them. User presentations focus on real world experiences in porting, maintaining, and running codes on large scale IBM systems. Issues may include (but are not limited to) code migration, scalable algorithms, hybrid programming models, exploiting system architectures, and scheduling and execution frameworks. IBM staff presentations include hardware and software roadmaps for large systems; application development support software tools; performance programming, measurement, analysis, and tuning techniques. Previous meetings in this series have been very well-attended and successful. Naturally, this year we will looking forward to welcoming HPCx users; you may also wish to consider making a presentation to the meeting. Full details, a registration form and the procedure for submitting abstracts can be found here: http://www.epcc.ed.ac.uk/scicomp/main.htm Important dates: 8 April 2005 (Friday) - Deadline for Abstracts 1 May 2005 (Sunday) - Early Registration Closes 31 May 2005 (Tuesday) - ScicomP Tutorial(s) 1-3 June 2005 (Wed-Fri) - ScicomP Meeting This meeting is co-located with SP-XXL, a meeting of system administrators of IBM HPC systems. Registration for this meeting is via the same webpage, but please note that attendance is restricted to members of the SP-XXL group. ---------------------------------------------------------------------- ADMIN FAQ I have entirely rewritten this. We hope it will provide an easy-to-use guide to the admin website. Admin FAQ: http://www.hpcx.ac.uk/projects/FAQ/ ---------------------------------------------------------------------- SC|05: ADVANCE NOTICE OF SERVICE INTERRUPTION SC|05, the 2005 conference in the Supercomputing series, takes place this November 12-18 in Seattle, Washington. In conjunction with this, HPCx, together with some of our users and our colleagues at CSAR and HPC services in the United States, are planning another trans- continental Grid computing demonstration, as a followup to the TeraGyroid project in 2003. Further details of this will be announced later. However, if this project goes ahead as planned, it will involve some interruption in the service over the period of SC|05. We are in consultation with EPSRC about this, and we will keep users informed. We feel that exploring this exciting new technology, which has the possibility of providing enormous advantages to researchers in the future, justifies our doing this. SC|05 Gateway to Discovery: http://sc05.supercomputing.org A good introduction to TeraGyroid: http://radio.weblogs.com/0105910/2003/11/23.html Issue 2 of "Capability Computing": http://www.hpcx.ac.uk/about/newsletter/HPCxNews02.pdf ---------------------------------------------------------------------- Regards --John ---------------------------------------------------------------------- Earlier mailings: http://www.hpcx.ac.uk/support/notices/index.html To be removed from the mailing list: log into your website account, go to the "Update" page, and click the "Opt out of user emails" field; then click "Commit update". -- John Fisher j.fisher@epcc.ed.ac.uk HPCx User Administration and Helpdesk HPCx: http://www.hpcx.ac.uk Helpdesk: support@hpcx.ac.uk Phone: +44 131 650 5029 Fax: +44 131 650 6555