Arm Forge User Guide Version 20.2 Arm Forge 20.2 Document history Version Date Confidentiality Change 20.1 25th June, 2020 Non-confidential Document update to version 20.1 20.1.1 31st July, 2020 Non-confidential Document update to version 20.1.1 20.1.2 4th September, 2020 Non-confidential Document update to version 20.1.2 20.1.3 2nd October, 2020 Non-confidential Document update to version 20.1.3 20.2 13th November, 2020 Non-confidential Document update to version 20.2 Copyright © 2002-2020 Arm Limited (or its affiliates). All rights reserved. 1 101136_2020_00_en Arm Forge 20.2 Non-Confidential Proprietary Notice This document is protected by copyright and other related rights and the practice or implementation of the information contained in this document may be protected by one or more patents or pending patent applications. No part of this document may be reproduced in any form by any means without the express prior written permission of Arm. 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All rights reserved. 3 101136_2020_00_en Arm Forge 20.2 CONTENTS Contents Contents 4 I Arm Forge 18 1 Introduction to Arm Forge 18 1.1 Arm DDT .......................................... 18 1.2 Arm MAP .......................................... 19 1.3 Arm Performance Reports ................................. 19 1.4 Online resources ...................................... 20 2 Installation 21 2.1 Linux graphical install ................................... 21 2.2 Linux text-mode install ................................... 23 2.3 Mac installation ....................................... 24 2.4 Windows installation .................................... 24 2.5 License files ......................................... 25 2.6 Workstation and evaluation licenses ............................ 25 2.7 Supercomputing and other floating licenses ........................ 26 2.8 Architecture licensing .................................... 27 2.8.1 Using multiple architecture licenses ........................ 27 2.9 Environment variables ................................... 27 2.9.1 Performance Report customization ......................... 27 2.9.2 Warning suppression ................................ 28 2.9.3 I/O behavior .................................... 28 2.9.4 Licensing ...................................... 28 2.9.5 Timeouts ...................................... 29 2.9.6 Sampler ....................................... 29 2.9.7 Simple troubleshooting ............................... 31 3 Connecting to a remote system 32 3.1 Remote connections dialog ................................. 32 3.2 Remote launch settings ................................... 33 3.2.1 Remote script .................................... 34 3.3 Reverse Connect ...................................... 35 3.3.1 Overview ...................................... 35 3.3.2 Usage ........................................ 35 3.3.3 Connection details ................................. 36 3.4 Treeserver or general debugging ports ........................... 36 3.5 Using X forwarding or VNC ................................ 36 4 Starting Arm Forge 38 II DDT 40 5 Getting started 40 5.1 Running a program ..................................... 41 5.1.1 Application ..................................... 41 5.1.2 MPI ......................................... 42 Copyright © 2002-2020 Arm Limited (or its affiliates). All rights reserved. 4 101136_2020_00_en Arm Forge 20.2 CONTENTS 5.1.3 OpenMP ...................................... 42 5.1.4 CUDA ....................................... 42 5.1.5 Memory debugging ................................. 43 5.1.6 Environment variables ............................... 43 5.1.7 Plugins ....................................... 43 5.2 Express Launch ....................................... 44 5.2.1 Run dialog box ................................... 45 5.3 remote-exec required by some MPIs .......................... 45 5.4 Debugging single-process programs ............................ 46 5.5 Debugging OpenMP programs ............................... 46 5.6 Manual launching of multi-process non-MPI programs .................. 48 5.7 Debugging MPMD programs ................................ 49 5.7.1 Debugging MPMD programs without Express Launch .............. 49 5.7.2 Debugging MPMD programs in Compatibility mode ............... 49 5.8 Opening core files ...................................... 50 5.9 Attaching to running programs ............................... 50 5.9.1 Automatically detected MPI jobs .......................... 51 5.9.2 Attaching to a subset of an MPI job ........................ 51 5.9.3 Manual process selection .............................. 51 5.9.4 Configuring attaching to remote hosts ....................... 53 5.9.5 Using DDT command-line arguments ....................... 53 5.10 Starting a job in a queue .................................. 54 5.11 Job scheduling with jsrun .................................. 54 5.12 Using custom MPI scripts .................................. 55 5.13 Starting DDT from a job script ............................... 57 5.14 UPC ............................................. 58 5.14.1 GCC UPC ..................................... 58 5.14.2 Berkeley UPC ................................... 58 5.15 Numactl ........................................... 58 5.15.1 MPI and SLURM .................................. 59 5.15.2 Non-MPI Programs ................................. 59 5.16 Python debugging ...................................... 59 5.16.1 Overview ...................................... 59 5.16.2 Running ......................................