Benchmark multithread

AntonioPrioletti · Joined: 02 May 2011 Posts: 20

Hi,
I created a multithread application, creating a thread with unix function pthread_t name_thead. And in makefile I insert the option "-lpthread" for include the library, and in the application I include the library <pthread>. But when I compile the compilator don't recognizes pthread_t. Where is the problem??

DuncGrah · Posted: Wed Oct 12, 2011 1:45 am Post subject:

You are using the wrong Compiler!

I suspect you are using a bare metal compiler when, in fact, you need a compiler for a Linux hosted system whose libraries will support pthreads

AntonioPrioletti · Joined: 02 May 2011 Posts: 20

DuncGrah · Posted: Wed Oct 12, 2011 2:01 am Post subject:

One you could try is from CodeSourcery. They have a lite version of the GNU toolchain .. I found them at this link. You will want the GNU/Linux version.

There will be other toolchains you could use.

Remember, you will then need to run this within a Linux operating system on a platform such as the Arm IntegratorCP or MIPS Malta virtual platforms.

AntonioPrioletti · Joined: 02 May 2011 Posts: 20

DuncGrah · Posted: Wed Oct 12, 2011 3:12 am Post subject:

MSYS provides a Linux like environment on a Windows system. It has nothing to do with running or compiling.

You will also have installed MINGW which provides a host toolchain. This was used to compile the virtual platform (OVPsim_or1k.c?) that runs the simulation.

The application that was executing on the OR1K processor model was compiled by an OR1K cross compiler toolchain. This application does not use features that are only available from an operating system, such as pthreads, that you now want to use.

What are you trying to do?

AntonioPrioletti · Joined: 02 May 2011 Posts: 20

LeeMoore · OVP Technologist Joined: 27 Feb 2008 Posts: 635

Firstly what is the threads package you intend to use, I will assume pthreads (posix threads)

For pthreads to execute correctly, it requires services from a Virtual Memory operating system, because it makes use of system calls such as clone().

This means that a bare metal compiler will not be capable of compiling an application which uses calls to pthreads() functions (it has no virtual memory support), you must use a compiler which runs under a virtual memory operating system, such as Linux.

If you compile an application to run under a Linux operating system, you must create a platform capable of running the Linux Operating system, and run the operating system on the platform, the application can then be executed as a user application.

This is all based upon the premise that you are using posix threads, if your intention is to use a different threads package, then this is not the case.

If posix is your intended target, I would suggest looking at the Mips Malta platform or the Arm Integrator platform.

Thx
Lee

AntonioPrioletti · Joined: 02 May 2011 Posts: 20

LeeMoore · OVP Technologist Joined: 27 Feb 2008 Posts: 635

please explain what is the intention of your benchmark ?
Are you trying to prove/disprove some theory ?

It is possible to install Debian Linux in the Mips Malta Platform, and then to compile multithreaded programs which will run on the simulated platforms.

It is not clear whether this will meet your goals, you have not discussed your ideas.

Thx
Lee

AntonioPrioletti · Joined: 02 May 2011 Posts: 20

LeeMoore · OVP Technologist Joined: 27 Feb 2008 Posts: 635

The Malta board is a develpment board provided by Mips Inc
http://www.mips.com/products/development-kits/malta/

There is extensive information about the model on this website if you look under http://www.ovpworld.org/download_MIPS.php

Thx
Lee