Difference between revisions of "Example pthread demo"

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This is a guide to the pthread C example project included in the EMAC OE SDK.
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{{#seo:
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|title=pthread demo
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|titlemode=append
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|keywords=pthread,pthread example
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|description=This is a guide to the <code>pthread_demo</code> C example project included in the EMAC OE SDK.
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This is a guide to the <code>pthread_demo</code> C example project included in the EMAC OE SDK.
  
 
This is a simple pthreads example application. A single thread is created to generate random data that is read by a specified number of reader threads.
 
This is a simple pthreads example application. A single thread is created to generate random data that is read by a specified number of reader threads.
  
'''INTRO'''
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The term ''pthread'' refers to [http://en.wikipedia.org/wiki/PThread POSIX Threads], a [http://en.wikipedia.org/wiki/POSIX POSIX] standard for threads.
what is a pthread?
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The <code>pthread_demo</code> project builds one executable: <code>p_thread_demo</code>.
  
 
== Opening, Building and Uploading the Project Files ==
 
== Opening, Building and Uploading the Project Files ==
  
<big>1. Open the C/C++ editing perspective.</big>
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For information on opening the project from within Eclipse, please see [[Importing the EMAC OE SDK Projects with Eclipse]]. Then, follow [[Using the EMAC OE SDK Projects with Eclipse]] for information on how to build, upload and execute the example.
  
stub
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Alternatively, the <code>Makefile</code> can be used with the <code>make</code> command from the commandline to build and upload the example.  For more information on this method, please see [[Using EMAC OE SDK Example Projects]].
  
<big>2. Open the fbench project files.</big>
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==Usage and Behavior==
 
 
stub
 
  
<big>3. Build the fbench project.</big>
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The <code>pthread_demo</code> project is an example of multithreaded code for generating and interacting with an arbitrary number of ''pthreads''. Within the '''pthread_demo.c''' C source file can be found demonstrations of how to, specifically:<br />
 
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*Create pthreads, line 90.
stub
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*Write to pthreads, line 141.
 
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*Read from pthreads, line 127.
<big>4. Upload the fbench and ffbench executables to the target system.</big>
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*Terminate and clean up after pthreads, line 119.
 
 
stub
 
 
 
==Usage and Behavior==
 
  
 
===Hardware Requirements===
 
===Hardware Requirements===
  
The <code>pthread demo</code> has no special hardware requirements. It should run just fine on any system for which the <code>pthread demo</code> project code can be successfully compiled.
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The <code>pthread_demo</code> C example project has no special hardware requirements. It should run just fine on any system for which the project files can be successfully compiled.
  
====Using <code>pthread_demo</code>====
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===Using <code>pthread_demo</code>===
  
 
  ./pthread_demo n
 
  ./pthread_demo n
where n is the number of threads
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where '''n''' is the number of threads
  
====Usage Example====
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===Usage Example===
  
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
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     reader: count = 2, data = 462104121
 
     reader: count = 2, data = 462104121
 
</syntaxhighlight>
 
</syntaxhighlight>
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==Summary==
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The <code>pthread_demo</code> C example project demonstrates how to use pthreads. For another example of pthread usage see [[Example pthread hello]].

Revision as of 10:59, 10 April 2014

TODO: {{#todo:SEOKWREV;(12.11.13-12:03->JG+);(12.11.13-17:25->MD-);(12.12.13-11:25->JG+);(12.31.13-12:45->MD+);(04.07.14-09:50->BS+);(04.10.14-11:00->BS+)|Jgreene|oe 4,oe 5,jg,md,SEOKWREV,mg,bs}}

This is a guide to the pthread_demo C example project included in the EMAC OE SDK.

This is a simple pthreads example application. A single thread is created to generate random data that is read by a specified number of reader threads.

The term pthread refers to POSIX Threads, a POSIX standard for threads.

The pthread_demo project builds one executable: p_thread_demo.

Opening, Building and Uploading the Project Files

For information on opening the project from within Eclipse, please see Importing the EMAC OE SDK Projects with Eclipse. Then, follow Using the EMAC OE SDK Projects with Eclipse for information on how to build, upload and execute the example.

Alternatively, the Makefile can be used with the make command from the commandline to build and upload the example. For more information on this method, please see Using EMAC OE SDK Example Projects.

Usage and Behavior

The pthread_demo project is an example of multithreaded code for generating and interacting with an arbitrary number of pthreads. Within the pthread_demo.c C source file can be found demonstrations of how to, specifically:

  • Create pthreads, line 90.
  • Write to pthreads, line 141.
  • Read from pthreads, line 127.
  • Terminate and clean up after pthreads, line 119.

Hardware Requirements

The pthread_demo C example project has no special hardware requirements. It should run just fine on any system for which the project files can be successfully compiled.

Using pthread_demo

./pthread_demo n

where n is the number of threads

Usage Example

root@PPCE7:/tmp# ./pthread_demo 3
generating new random data
generating new random data
    reader: count = 0, data = 693451072
generating new random data
    reader: count = 1, data = 1195545710
generating new random data
    reader: count = 2, data = 462104121

Summary

The pthread_demo C example project demonstrates how to use pthreads. For another example of pthread usage see Example pthread hello.