Development/Valgrind - Revision history

S Richling: S Richling moved page Valgrind to Development/Valgrind: Umzung in Developmentbereich

2022-12-08T22:47:55Z

S Richling moved page Valgrind to Development/Valgrind: Umzung in Developmentbereich

← Older revision	Revision as of 00:47, 9 December 2022
(No difference)

2022-12-08T22:37:09Z

← Older revision		Revision as of 00:37, 9 December 2022
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	</pre>		</pre>
	The execution can take longer but now we know that the problem is most likely in line 17 (which is correct).		The execution can take longer but now we know that the problem is most likely in line 17 (which is correct).
	<br>
	[[Category:debugger software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry]]

2022-02-22T14:34:01Z

Update Valgrind part 2

← Older revision		Revision as of 16:34, 22 February 2022
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			{{Softwarepage\|devel/valgrind}}

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

2022-02-22T14:33:12Z

Update Valgrind part 1

2015-12-14T14:15:52Z

Online

← Older revision		Revision as of 16:15, 14 December 2015
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	= Documentation =		= Documentation =
	== Online ==		== Online ==
	* [http://valgrind.org/docs/ Valgrind Documentation]		[http://valgrind.org/docs/ Online Valgrind Documentation]

	== Local ==		== Local ==
	<pre>$ man valgrind</pre>		<pre>$ man valgrind</pre>

2015-12-14T14:15:22Z

Introduction

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	'''Valgrind''' is an instrumentation framework for building dynamic analysis tools. There are Valgrind tools that can automatically detect many memory management and threading bugs, and profile your programs in detail. You can also use Valgrind to build new tools.		'''Valgrind''' is an instrumentation framework for building dynamic analysis tools. There are Valgrind tools that can automatically detect many memory management and threading bugs, and profile your programs in detail. You can also use Valgrind to build new tools.
	<br>		<br>
	[http://valgrind.org/info/about.html ~~About~~ Valgrind]		[http://valgrind.org/info/about.html Click here for more infos about Valgrind]
	<br>		<br>
	<br>		<br>

	= Commands =		= Commands =
	Valgrind ships with various tools, some of them are described in the following table.		Valgrind ships with various tools, some of them are described in the following table.

2015-12-14T14:14:37Z

Example for helgrind and drd

← Older revision		Revision as of 16:14, 14 December 2015
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	</pre>		</pre>
	The execution can take longer but now we know that the problem is most likely in line 17 (which is correct).		The execution can take longer but now we know that the problem is most likely in line 17 (which is correct).
			<br>
	[[Category:debugger software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry]]		[[Category:debugger software]][[Category:bwUniCluster]][[Category:bwForCluster_Chemistry]]

2015-12-14T14:13:43Z

Versions and Availability

← Older revision		Revision as of 16:13, 14 December 2015
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	}}		}}
	On the command line interface of any bwHPC cluster you'll get a list of available versions		On the command line interface of any bwHPC cluster you'll get a list of available versions
	by using the command ~~''''module avail devel/valgrind''''.~~		by using the command<br>
			''''module avail devel/valgrind''''.
	<pre>		<pre>
	$ module avail devel/valgrind # bwForCluster (Justus)		$ module avail devel/valgrind # bwForCluster (Justus)
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	<font color=red>Attention!</font><br>		<font color=red>Attention!</font><br>
	The default Linux Valgrind debugger may be a different version (if installed).		The default Linux Valgrind debugger may be a different version (if installed).
			<br>
	Check the <font color=green>default</font> version by: ''''valgrind --version'''' <font color=red>without loaded valgrind-module</font> (if available).		Check the <font color=green>default</font> version by: ''''valgrind --version'''' <font color=red>without loaded valgrind-module</font> (if available).
	<pre>		<pre>
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	valgrind-3.8.1</pre>		valgrind-3.8.1</pre>
	<br>		<br>

	= Documentation =		= Documentation =
	== Online ==		== Online ==

2015-12-14T14:12:41Z

@@ Line 1: / Line 1: @@
 |-
 |-
 | License
 |-
 |Citing
+| n/a
 |-
 | Links
-| [http://valgrind.org/ Homepage]
+| [http://valgrind.org/ Valgrind Homepage]
 |-
 | Graphical Interface
 | No
 |}
 |-
 ! Tool
@@ Line 39: / Line 51: @@
 | Detects race conditions. Does not detect deadlocks but needs less memory than helgrind.
 |}
 To simulate your program and gather information about it using a specific tool, valgrind can be called like this
 <pre>$ valgrind --tool=<tool> --log-file=<logfile> ./example</pre>
 For example to check for race conditions the command would look like this:
 <pre>$ valgrind --tool=drd --log-file=log.mem ./example</pre>
 Beware that the simulation via valgrind can take much longer and can consume much more memory compared to a normal execution.
 Furthermore the tools can give false positives, i.e. they report errors even though the are none.
-'''Example for helgrind and drd:'''
+= Example for helgrind and drd =
 This small program demonstrates how to detect data races in parallel programs. Both helgrind and drd support POSIX Threads (Pthreads) but not OpenMP so prepare to get many false positives when using these tools with OpenMP.
@@ Line 150: / Line 188: @@
 </pre>
 The execution can take longer but now we know that the problem is most likely in line 17 (which is correct).

2014-05-12T14:49:53Z

← Older revision		Revision as of 16:49, 12 May 2014
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			<!--{\| align="right" {{Table\|width=40%}} -->

			{\|{{Softwarebox}}
			\|-
			! colspan="2" style="text-align:center" \| Valgrind
			\|-
			\| License
			\| GPL
			\|-
			\|Citing
			\|
			\|-
			\| Links
			\| [http://valgrind.org/ Homepage]
			\|
			\|-
			\| Graphical Interface
			\| No
			\|}
	Valgrind can be used for debugging and profiling programs. It ships with various tools, some of them are described in the following table.		Valgrind can be used for debugging and profiling programs. It ships with various tools, some of them are described in the following table.