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Debugging – Compiler Options Compilers give hints ‒ Turn optimization off -O0 -g – Switch on compiler compile-time and runtime checks (floating point exceptions, boundary checks, pointer checks, etc.) -qcheck[=] (C/C++) -qformat[=] (C/C++) -qinfo[=[][,]] (C/C++) -C (Fortran) -qsigtrap[=] (Fortran) -qinit=f90ptr (Fortran) -qflttrap[=] 82
Using Debuggers Prepare executable: -O0 -g -qfullpath Available debuggers – gdb – DDT (porting on the way) – Totalview (ported, currently testing) 83
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JUQUEEN: Application Stack and Best
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Outline Supercomputing@JSC Jülich
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Jülich Supercomputing Centre (JSC)
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Integration of JSC in Networks and
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Supercomputer Systems@JSC: Dual Con
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User Support @ JSC - Overview Cross
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JUQUEEN - System Architecture IBM B
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Accounting Billing - Jobs charged f
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Module Environment Module concept -
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Module Environment Six module categ
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Module Environment $ module help ar
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JUQUEEN - Application Stack Mathema
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Running Simulations - Batch System
Page 31 and 32: LoadLeveler - Job Command File ASCI
Page 33 and 34: LoadLeveler - Blue Gene/Q Keywords
Page 35 and 36: Running Simulations - runjob Comman
Page 37 and 38: Running Simulations - MPI/OpenMP Co
Page 39 and 40: Monitoring of Jobs • LoadLeveler
Page 41 and 42: Outline Supercomputing@JSC Jülich
Page 43 and 44: Compilers for CN Language Compiler
Page 45 and 46: Basic Compiler Options - XL Compile
Page 47 and 48: MPI Message-Passing Interface - Bas
Page 49 and 50: Creating static Libraries Preferred
Page 51 and 52: Outline Supercomputing@JSC Jülich
Page 53 and 54: Example: Compilers Diagnostics subr
Page 55 and 56: Quad floating Point eXtension unit
Page 57 and 58: IBM XL Compiler Support for QPX Usa
Page 59 and 60: IBM XL QPX Intrinsics • New intri
Page 61 and 62: Thread Level Speculation (TLS) •
Page 63 and 64: Thread Level Speculation Loop: save
Page 65 and 66: Transactional Memory • Enabling b
Page 67 and 68: Choosing Shape and Mapping • Shap
Page 69 and 70: MPI Tuning - BG/Q Extensions Blue G
Page 71 and 72: Time (s) File I/O - Task-local File
Page 73 and 74: SIONlib - An Alternative to Task-Lo
Page 75 and 76: SIONlib - An Alternative to Task-Lo
Page 77 and 78: Performance Analysis Goal: Detectio
Page 79 and 80: Scalasca Toolset for callpath and c
Page 81: Outline Supercomputing@JSC Jülich
Page 85: Thank You! JSC user and application
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JUQUEEN - Prace Training Portal

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