Development/Intel Compiler - Revision history

R Keller: Update Intel Compiler for LLVM-based / OneAPI

2024-10-09T13:17:55Z

Update Intel Compiler for LLVM-based / OneAPI

← Older revision		Revision as of 15:17, 9 October 2024
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	\|-		\|-
	\| module load		\| module load
	\| compiler/intel		\| compiler/intel/VERSION and compiler/intel/VERSION_llvm
	\|-		\|-
	\| License		\| License
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	<br>		<br>
	= Introduction =		= Introduction =
			The '''Intel Compiler''' consists of tools to compile and debug C, C++ and Fortran programs, and currently is in a transition phase: the so-called legacy compiler (based on an Intel in-house development with many optimization hints) and the newer LLVM-based compiler (where many of these optimizations and hints are ported to). To smoothly handle this transition we offer the standard legacy compiler plus the new LLVM-based compiler with the ''_llvm'' prefix.
	The '''Intel Compiler''' of the '''Intel Composer XE Suite''' consists of tools to compile and debug C, C++ and Fortran programs:
			The following table shows the preferred names:
	{\| width=~~500px~~ class="wikitable"		{\| width=600px class="wikitable"
			\|-
		⚫	\|style="padding:3px"\| '''Tool'''
		⚫	\|style="padding:3px"\| '''Legacy name'''
		⚫	\|style="padding:3px"\| '''LLVM-based name'''
			\|-
	\|-		\|-
⚫	\|style="padding:3px"\| ~~icc~~
	\|style="padding:3px"\| Intel C compiler		\|style="padding:3px"\| Intel C compiler
		⚫	\|style="padding:3px"\| icc
		⚫	\|style="padding:3px"\| icx
	\|-		\|-
⚫	\|style="padding:3px"\| ~~icpc~~
	\|style="padding:3px"\| Intel C++ compiler		\|style="padding:3px"\| Intel C++ compiler
			\|style="padding:3px"\| icpc
			\|style="padding:3px"\| icpx
	\|-		\|-
⚫	\|style="padding:3px"\| ~~ifort~~
	\|style="padding:3px"\| [https://software.intel.com/en-us/fortran-compilers Intel Fortran compiler]		\|style="padding:3px"\| [https://software.intel.com/en-us/fortran-compilers Intel Fortran compiler]
			\|style="padding:3px"\| ifort
			\|style="padding:3px"\| ifx
	\|-		\|-
⚫	\|style="padding:3px"\| ~~[[#GUI\|idb]]~~
	\|style="padding:3px"\| Intel debugger in GUI mode (until version 14 only)		\|style="padding:3px"\| Intel debugger in GUI mode (until version 14 only)
			\|style="padding:3px"\| [[#GUI\|idb]]
			\|style="padding:3px"\| N/A
	\|-		\|-
			\|style="padding:3px"\| Intel GNU debugger in console mode (from version 15)
	\|style="padding:3px"\| [[#Console Mode\|gdb-ia]]		\|style="padding:3px"\| [[#Console Mode\|gdb-ia]]
	\|style="padding:3px"\| ~~Intel version of GNU debugger in console mode (from version 15)~~		\|style="padding:3px"\| gdb-oneapi
	\|-		\|-
⚫	\|style="padding:3px"\| ~~[[#Console Mode\|idbc]]~~
	\|style="padding:3px"\| Intel debugger in console mode (until version 14 only)		\|style="padding:3px"\| Intel debugger in console mode (until version 14 only)
			\|style="padding:3px"\| [[#Console Mode\|idbc]]
			\|style="padding:3px"\| N/A
	\|}		\|}
	The intel compiler suite also includes the TBB (Threading Building Blocks) ~~and~~ IPP (Integrated Performance Primitives) libraries.		The intel compiler suite also includes the TBB (Threading Building Blocks), IPP (Integrated Performance Primitives) and oneAPI libraries.
	<br>		<br>
	<br>		<br>
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	* [https://software.intel.com/en-us/articles/intel-c-composer-xe-documentation Intel® C-Compiler Documentation]		* [https://software.intel.com/en-us/articles/intel-c-composer-xe-documentation Intel® C-Compiler Documentation]
	* [https://software.intel.com/en-us/intel-software-technical-documentation Intel® Software Documentation Library]		* [https://software.intel.com/en-us/intel-software-technical-documentation Intel® Software Documentation Library]

	= Debugger =
	Please use DDT. It is a parallel debugger with graphical user interface and can also be used for debugging serial programs. The description of the debugger can be found on the website
	<br>
	http://www.bwhpc-c5.de/wiki/index.php/DDT
	<br><br>

	= Optimizations =		= Optimizations =
	You can turn on various optimization options to enhance the performance of your program. Which options are the best depends on the specific program and can be determined by benchmarking your code. A command which gives good performance and a decent file size is		You can turn on various optimization options to enhance the performance of your program. Which options are the best depends on the specific program and can be determined by benchmarking your code. A command which gives good performance and a decent file size is
	'''~~icc~~ -xHost -O2 ex.c'''.		'''icx -xHost -O2 ex.c'''.
	With the option '''-xHost''' instructions for the highest instruction set available on the compilation host processor are generated. If you want to generate optimal code on bwUniCluster for both nodes with Sandy Bridge architecture and nodes with Broadwell architecture, you must compile your code with the options '''-xAVX -axCORE-AVX2''' (instead of '''-xHost''').		With the option '''-xHost''' instructions for the highest instruction set available on the compilation host processor are generated. If you want to generate optimal code on bwUniCluster for both nodes with Sandy Bridge architecture and nodes with Broadwell architecture, you must compile your code with the options '''-xAVX -axCORE-AVX2''' (instead of '''-xHost''').
	<br>		<br>
	There are more aggressive optimization flags and levels (e.g. -O3 or -fast and implied options) but the compiled programs can get quite large due to inlining. Additionally the compilation process will probably take longer. Moreover it may happen that the compiled program is even slower -- or may require installation of additional statically-linked libraries. Such a command would be for example:		There are more aggressive optimization flags and levels (e.g. -O3 or -fast and implied options) but the compiled programs can get quite large due to inlining. Additionally the compilation process will probably take longer. Moreover it may happen that the compiled program is even slower -- or may require installation of additional statically-linked libraries. Such a command would be for example:
	'''~~icc~~ -fast ex.c'''		'''icx -fast ex.c'''
	<br>		<br>
	<br>		<br>
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	= Profiling =		= Profiling =
	Profiling an application means augmenting the compiled binary with information on execution counts per source-line (and basic blocks) -- e.g. one may see how many times an if-statement has been evaluated to true. To do so, compile your code with the profile flag:		Profiling an application means augmenting the compiled binary with information on execution counts per source-line (and basic blocks) -- e.g. one may see how many times an if-statement has been evaluated to true. To do so, compile your code with the profile flag:
	'''~~icc~~ -p ex.c -o ex'''.		'''icx -p ex.c -o ex'''.
	<br>		<br>
	Using the gprof tool, one may manually inspect execution count of each executed line of source code.		Using the gprof tool, one may manually inspect execution count of each executed line of source code.
	<br>		<br>
	For compiler optimization, recompile your source using		For compiler optimization, recompile your source using
	'''~~icc~~ -prof-gen ex.c -o ex'''		'''icx -prof-gen ex.c -o ex'''
	then execute the most co]]mmon and typical use-case of your application, and then recompile using the generated profile count (and using optimization):		then execute the most co]]mmon and typical use-case of your application, and then recompile using the generated profile count (and using optimization):
	'''~~icc~~ -prof-use -O2 ex.c -o ex'''.		'''icx -prof-use -O2 ex.c -o ex'''.
	<br>		<br>
	== Further literature ==		== Further literature ==
	A tutorial on optimization can be found at [https://~~software~~.intel.com/~~sites~~/~~default~~/~~files~~/~~managed~~/c1/61/~~compiler~~-~~essentials~~.~~1.pdf~~ ~~Compiler-~~Essentials~~.pdf~~]		A tutorial on optimization can be found at [https://www.intel.com/content/www/us/en/developer/articles/technical/vectorization-essential.html Vectorization Essentials]
	and to get the different optimization options execute		and to get the different optimization options execute
	'''~~icc~~ -help opt'''		'''icx -help opt'''
			or
	'''~~icc~~ -help advanced'''		'''icx -help advanced'''
	<br>		<br>
	or the previously described catch-all option '''''-v --help'''''.		or the previously described catch-all option '''''-v --help'''''.

S Richling at 21:57, 8 December 2022

2022-12-08T21:57:20Z

← Older revision		Revision as of 23:57, 8 December 2022
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	<br>		<br>
	or the previously described catch-all option '''''-v --help'''''.		or the previously described catch-all option '''''-v --help'''''.

	[[Category:Compiler_software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry]]

S Richling at 21:44, 8 December 2022

2022-12-08T21:44:50Z

← Older revision		Revision as of 23:44, 8 December 2022
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	<br>		<br>
	More information about the MPI versions of the Intel Compiler is available here:		More information about the MPI versions of the Intel Compiler is available here:
	* [[~~BwHPC_BPG_for_Parallel_Programming~~\|Best Practices Guide for Parallel Programming]].		* [[Development/Parallel_Programming\|Best Practices Guide for Parallel Programming]].
	<br>		<br>

S Richling: S Richling moved page Intel Compiler to Development/Intel Compiler: Umzug in den Development-Bereich

2022-12-07T11:28:52Z

S Richling moved page Intel Compiler to Development/Intel Compiler: Umzug in den Development-Bereich

← Older revision	Revision as of 13:28, 7 December 2022
(No difference)

F Bartusch at 09:55, 6 December 2022

2022-12-06T09:55:12Z

← Older revision		Revision as of 11:55, 6 December 2022
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	or the previously described catch-all option '''''-v --help'''''.		or the previously described catch-all option '''''-v --help'''''.

	[[Category:Compiler_software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry~~]][[Category:BwForCluster_BinAC~~]]		[[Category:Compiler_software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry]]

S Richling at 11:19, 1 November 2022

2022-11-01T11:19:51Z

← Older revision		Revision as of 13:19, 1 November 2022
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	or the previously described catch-all option '''''-v --help'''''.		or the previously described catch-all option '''''-v --help'''''.

	[[Category:Compiler_software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry]][[Category:BwForCluster_BinAC~~]][[Category:bwForCluster_MLS&WISO_Production~~]]		[[Category:Compiler_software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry]][[Category:BwForCluster_BinAC]]

H Winkhardt at 13:21, 21 December 2021

2021-12-21T13:21:46Z

← Older revision		Revision as of 15:21, 21 December 2021
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	{{Softwarepage}}		{{Softwarepage\|compiler/intel}}

	{\| width=600px class="wikitable"		{\| width=600px class="wikitable"

H Winkhardt at 08:14, 16 December 2021

2021-12-16T08:14:06Z

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 More information about the MPI versions of the Intel Compiler is available here:
 * [[BwHPC_BPG_for_Parallel_Programming|Best Practices Guide for Parallel Programming]].
 <br>
@@ Line 107: / Line 57: @@
 * [https://software.intel.com/en-us/articles/intel-c-composer-xe-documentation Intel® C-Compiler Documentation]
 * [https://software.intel.com/en-us/intel-software-technical-documentation Intel® Software Documentation Library]
 = Debugger =

R Keller at 19:41, 5 November 2020

2020-11-05T19:41:21Z

← Older revision		Revision as of 21:41, 5 November 2020
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	\|-		\|-
	\| License		\| License
	\| Commercial. See $INTEL_HOME/install-doc/EULA.txt. \| [https://software.intel.com/en-us/faq/licensing Intel Product ~~Licensig~~ FAQ]		\| Commercial. See $INTEL_HOME/install-doc/EULA.txt. \| [https://software.intel.com/en-us/faq/licensing Intel Product Licensing FAQ]
	\|-		\|-
	\|Citing		\|Citing

T Kienzle at 07:50, 28 November 2017

2017-11-28T07:50:30Z

← Older revision		Revision as of 09:50, 28 November 2017
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	= Documentation =		= Documentation =
	== Online documentation ==		== Online documentation ==
	* [~~http~~://software.intel.com/en-us/articles/intel-c-composer-xe-documentation Intel® C-Compiler Documentation]		* [https://software.intel.com/en-us/articles/intel-c-composer-xe-documentation Intel® C-Compiler Documentation]
	* [https://software.intel.com/en-us/intel-software-technical-documentation Intel® Software Documentation Library]		* [https://software.intel.com/en-us/intel-software-technical-documentation Intel® Software Documentation Library]