Editing Arm DDT

{{Infobox software
| name = Linaro DDT
| title = Linaro DDT
| developer = [[Linaro]] (formerly Arm Forge, formerly Allinea Software Ltd.)
| released = 2002
| latest release version = 24.1.1
| latest release date = {{Start date and age|2024|12}}<ref>[https://www.linaroforge.com/release-history Linaro Forge Release History]</ref>
| operating system = [[Linux]] and [[Blue Gene/Q]]. ([[Windows]] and [[macOS]] for remote client)
| platform = [[x86-64|x86-64]], [[ARM architecture|Arm]], [[PowerPC]], [[Intel MIC|Intel Xeon Phi]] and [[CUDA]]
| language = English
| genre = [[Debugger]]
| licence = [[Proprietary software|Proprietary]] [[commercial software]]
| website = {{URL|https://www.linaroforge.com/linaro-ddt}}
}}
'''Linaro DDT''' is a commercial [[C (programming language)|C]], [[C++]] and [[Fortran|Fortran 90]] [[debugger]].<ref>{{cite news
 | title       = How Allinea Helps Scientists Run their Applications Faster and Better
 | url         = http://insidehpc.com/2012/12/05/how-allinea-helps-scientists-run-their-applications-faster-and-better/
 | publisher   = InsideHPC
 | date        = 5 December 2012
}}</ref> It is widely used for debugging [[parallel computing|parallel]] [[Message Passing Interface]] (MPI) and threaded ([[pthread]] or [[OpenMP]]) programs, including those running on [[computer cluster|clusters]] of [[Linux]] machines.

==Debugger==
It is used to find bugs on both small and large clusters, from 1 to 100,000s of [[Processor (computing)|processors]].  It features [[memory debugging]] which detect [[memory leak]]s, or reading and writing beyond the bounds of arrays.

It was the first debugger to be able to debug [[petascale]] applications - having been used to debug applications running concurrently on 220,000 processes on a [[Cray XT5]] at [[Oak Ridge National Laboratories]].<ref>{{cite web|url=http://www.olcf.ornl.gov/2010/07/12/upgrade-adds-muscle-to-debugger/|title=Upgrade Adds Muscle to Debugger|publisher=Oak Ridge National Laboratories|accessdate=14 June 2011|archive-url=https://web.archive.org/web/20110623011535/http://www.olcf.ornl.gov/2010/07/12/upgrade-adds-muscle-to-debugger/|archive-date=2011-06-23|url-status=dead}}</ref><ref>{{cite news|url=http://cacm.acm.org/news/96797-ornl-allinea-prep-debugging-tool-for-petascale-supercomputers/fulltext|title=ORNL, Allinea Prep Debugging Tool for Petascale Supercomputers|date=30 July 2010|journal=Communications of the ACM}}</ref> This is possible interactively as the debugger's control tree architecture leads to logarithmic performance for most collective operations. Linaro DDT uses the [[GNU Debugger]] as debug engine.

Linaro DDT also supports coprocessor architectures such as [[Intel Xeon Phi coprocessor]]s<ref>{{cite news|url=http://www.hpcwire.com/hpcwire/2012-11-13/allinea_releases_tools_for_xeon_phi_developers.html|title=Allinea Releases Tools for Xeon Phi Developers|date=13 November 2012|publisher=HPCWire|access-date=2013-01-15|archive-url=https://web.archive.org/web/20130307035519/http://www.hpcwire.com/hpcwire/2012-11-13/allinea_releases_tools_for_xeon_phi_developers.html|archive-date=2013-03-07|url-status=dead}}</ref> and [[Nvidia]] [[CUDA]] [[Graphics processing unit|GPUs]].<ref>{{cite web|url=https://developer.nvidia.com/debugging-solutions|title=NVIDIA debugging solutions page|date=19 August 2011 }}</ref>

It is part of Linaro Forge - a suite of tools for developing code in high performance computing - which also includes the performance profiler for scalar, multithreaded and parallel codes - [[Linaro MAP]].<ref>{{Cite web |title=Linaro Forge |url=https://www.linaroforge.com/ |access-date=2024-10-13 |website=www.linaroforge.com |language=en}}</ref>

{{As of|2011}}, 80 percent of the world's top 25 supercomputers on the [[TOP500]] list, use Arm's tools.<ref>{{cite news
 |title        = Allinea Selected as a Red Herring Top 100 Europe Technology Company
 |url          = http://www.hpcwire.com/hpcwire/2011-06-01/allinea_selected_as_a_red_herring_top_100_europe_technology_company.html
 |publisher    = [[Tabor Communications]]
 |work         = HPCwire
 |date         = 2011-06-01
 |accessdate   = 2013-02-07
 |archive-url  = https://web.archive.org/web/20120314112744/http://www.hpcwire.com/hpcwire/2011-06-01/allinea_selected_as_a_red_herring_top_100_europe_technology_company.html
 |archive-date = 2012-03-14
 |url-status     = dead
}}</ref>

==Notes==
{{Reflist}}

==External links==
*[https://www.linaro.org/news/linaro-to-acquire-arm-forge-software-tools-business/ Linaro to Acquire Arm Forge Software Tools Business]
*[https://web.archive.org/web/20150110111750/http://www.vi-hps.org/tools/allinea-ddt.html Virtual Institute for High Productivity Supercomputing Allinea DDT guide]

[[Category:Debuggers]]