Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

[gagan singh]

Chaps,
                     Do the Angstrom version of Linux supports SMP for  Dual core (A8 + TI DSP 320C64x) beagle board. If not, where I should look in tutorial to work on adding support for such a feature.
 I try Google it but no much could be located.
  
Regards
 
Gagan
 



From philb@gnu.org Tue Jan 12 16:08:32 2010
Received: from mail.reciva.com ([82.71.203.194] helo

Re: Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

[Koen Kooi]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 12-01-10 15:57, gagan singh wrote:
> Chaps,
>                      Do the Angstrom version of Linux supports SMP for  Dual core (A8 + TI DSP 320C64x) beagle board. If not, where I should look in tutorial to work on adding support for such a feature.
>  I try Google it but no much could be located.

I think you mean "is dsplink supported", which case, yes, dsplink is
supported.

regards,

Koen

http://wiki.davincidsp.com/index.php/DSPLink_Overview
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (Darwin)

iD8DBQFLTJKPMkyGM64RGpERAmWqAKCgyzg/ElV/lguyAgVQ0++UW8XceACfTvjY
bH50aXoKYdiPmG2oSnid7wA=
=Omt9
-----END PGP SIGNATURE-----

Re: Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

[gagan singh]

Hi Phil,
               
I thought general response time of any general application time will be faster.
Say Just getting a feeling of running General purpose Computer OS/applications  on a 1 GHz  processor while actually it is running on 500MHz CPU with SMP support(Keeping overhead time aside)
           DSP seems to remain idle most of the time while everything runs on Arm core.  You says difficult to implement on that sort Of Cores. Do the inter communication link/memory interface  is bottle neck for implementing shared workload.
 
regards
 
Gagan


--- On Tue, 1/12/10, Phil Blundell <philb@gnu.org> wrote:


From: Phil Blundell <philb@gnu.org>
Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
To: openembedded-devel@lists.openembedded.org
Date: Tuesday, January 12, 2010, 10:06 AM


On Tue, 2010-01-12 at 06:57 -0800, gagan singh wrote:
>                      Do the Angstrom version of Linux supports SMP for  Dual core (A8 + TI DSP 320C64x) beagle board. If not, where I should look in tutorial to work on adding support for such a feature.
>  I try Google it but no much could be located.

I'm not quite sure what you are trying to do here.  It's hard to imagine
how you could have any meaningful kind of "symmetric" multiprocessing on
that combination of cores.

What exactly are you hoping to achieve?

p.



_______________________________________________
Openembedded-devel mailing list
Openembedded-devel@lists.openembedded.org
http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel




From gagan2172@yahoo.com Tue Jan 12 16:56:53 2010
Received: from n14.bullet.mail.mud.yahoo.com ([68.142.206.41])
	by linuxtogo.org with smtp (Exim 4.69)
	(envelope-from <gagan2172@yahoo.com>) id 1NUj6s-00005U-JD
	for openembedded-devel@lists.openembedded.org;
	Tue, 12 Jan 2010 16:56:50 +0100
Received: from [68.142.200.224] by n14.bullet.mail.mud.yahoo.com with NNFMP;
	12 Jan 2010 15:54:36 -0000
Received: from [76.13.13.26] by t5.bullet.mud.yahoo.com with NNFMP;
	12 Jan 2010 15:54:36 -0000
Received: from [67.195.9.81] by t3.bullet.mail.ac4.yahoo.com with NNFMP;
	12 Jan 2010 15:54:35 -0000
Received: from [98.137.27.213] by t1.bullet.mail.gq1.yahoo.com with NNFMP;
	12 Jan 2010 15:54:35 -0000
Received: from [127.0.0.1] by omp123.mail.gq1.yahoo.com with NNFMP;
	12 Jan 2010 15:54:35 -0000
X-Yahoo-Newman-Property: ymail-3
X-Yahoo-Newman-Id: 569403.65405.bm@omp123.mail.gq1.yahoo.com
Received: (qmail 61443 invoked by uid 60001); 12 Jan 2010 15:54:35 -0000
DKIM-Signature: v

Re: Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

[Phil Blundell]

I would have thought the interconnect performance would be the least of
your worries.  It seems that a rather bigger obstacle to running any
kind of SMP on this hardware would be the issue that the two cores have
different instruction sets: the DSP can't execute ARM code, and the ARM
can't execute DSP code.

p.

On Tue, 2010-01-12 at 07:51 -0800, gagan singh wrote:
> Hi Phil,
>                
> I thought general response time of any general application time will be faster.
> Say Just getting a feeling of running General purpose Computer OS/applications  on a 1 GHz  processor while actually it is running on 500MHz CPU with SMP support(Keeping overhead time aside)
>            DSP seems to remain idle most of the time while everything runs on Arm core.  You says difficult to implement on that sort Of Cores. Do the inter communication link/memory interface  is bottle neck for implementing shared workload.
>  
> regards
>  
> Gagan
> 
> 
> --- On Tue, 1/12/10, Phil Blundell <philb@gnu.org> wrote:
> 
> 
> From: Phil Blundell <philb@gnu.org>
> Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
> To: openembedded-devel@lists.openembedded.org
> Date: Tuesday, January 12, 2010, 10:06 AM
> 
> 
> On Tue, 2010-01-12 at 06:57 -0800, gagan singh wrote:
> >                      Do the Angstrom version of Linux supports SMP for  Dual core (A8 + TI DSP 320C64x) beagle board. If not, where I should look in tutorial to work on adding support for such a feature.
> >  I try Google it but no much could be located.
> 
> I'm not quite sure what you are trying to do here.  It's hard to imagine
> how you could have any meaningful kind of "symmetric" multiprocessing on
> that combination of cores.
> 
> What exactly are you hoping to achieve?
> 
> p.
> 
> 
> 
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
> 
> 
> 
>       
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel

Re: Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

[gagan singh]

Hi Phil,
            Thanks for the response.  So you recon Asynchronous Multi-Processing (AMP) concept is better suited in beagle board configuration.   If so what exactly I have to do in angstom to get such thing working. 
 
regards
 
Gagan
 
 
--- On Tue, 1/12/10, Phil Blundell <philb@gnu.org> wrote:


From: Phil Blundell <philb@gnu.org>
Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
To: openembedded-devel@lists.openembedded.org
Date: Tuesday, January 12, 2010, 11:44 AM


I would have thought the interconnect performance would be the least of
your worries.  It seems that a rather bigger obstacle to running any
kind of SMP on this hardware would be the issue that the two cores have
different instruction sets: the DSP can't execute ARM code, and the ARM
can't execute DSP code.

p.

On Tue, 2010-01-12 at 07:51 -0800, gagan singh wrote:
> Hi Phil,
>                
> I thought general response time of any general application time will be faster.
> Say Just getting a feeling of running General purpose Computer OS/applications  on a 1 GHz  processor while actually it is running on 500MHz CPU with SMP support(Keeping overhead time aside)
>            DSP seems to remain idle most of the time while everything runs on Arm core.  You says difficult to implement on that sort Of Cores. Do the inter communication link/memory interface  is bottle neck for implementing shared workload.
>  
> regards
>  
> Gagan
> 
> 
> --- On Tue, 1/12/10, Phil Blundell <philb@gnu.org> wrote:
> 
> 
> From: Phil Blundell <philb@gnu.org>
> Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
> To: openembedded-devel@lists.openembedded.org
> Date: Tuesday, January 12, 2010, 10:06 AM
> 
> 
> On Tue, 2010-01-12 at 06:57 -0800, gagan singh wrote:
> >                      Do the Angstrom version of Linux supports SMP for  Dual core (A8 + TI DSP 320C64x) beagle board. If not, where I should look in tutorial to work on adding support for such a feature.
> >  I try Google it but no much could be located.
> 
> I'm not quite sure what you are trying to do here.  It's hard to imagine
> how you could have any meaningful kind of "symmetric" multiprocessing on
> that combination of cores.
> 
> What exactly are you hoping to achieve?
> 
> p.
> 
> 
> 
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
> 
> 
> 
>       
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel



_______________________________________________
Openembedded-devel mailing list
Openembedded-devel@lists.openembedded.org
http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel




From rpjday@crashcourse.ca Wed Jan 13 16:12:15 2010
Received: from astoria.ccjclearline.com ([64.235.106.9])
	by linuxtogo.org with esmtp (Exim 4.69)
	(envelope-from <rpjday@crashcourse.ca>) id 1NV4tI-0004Hy-Aw
	for openembedded-devel@lists.openembedded.org;
	Wed, 13 Jan 2010 16:12:15 +0100
Received: from cpe002129687b04-cm001225dbafb6.cpe.net.cable.rogers.com
	([99.235.241.187] helo

Re: Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

[Phil Blundell]

It sounds as if you are hoping to use the DSP as a general purpose
application accelerator.  If that's the case then I fear you will be
disappointed; I don't believe there is any existing solution for that on
this hardware platform.  You can, obviously, use the DSP to accelerate
your own particular applications but you would need to write custom code
to do that.

If you want to do general purpose multiprocessing then you should
probably select a different processor: something like the Cortex-A9
MPCore would be much more suitable for this kind of application than the
CPU on the beagleboard.

p.

On Wed, 2010-01-13 at 07:06 -0800, gagan singh wrote:
> Hi Phil,
>             Thanks for the response.  So you recon Asynchronous Multi-Processing (AMP) concept is better suited in beagle board configuration.   If so what exactly I have to do in angstom to get such thing working. 
>  
> regards
>  
> Gagan
>  
>  
> --- On Tue, 1/12/10, Phil Blundell <philb@gnu.org> wrote:
> 
> 
> From: Phil Blundell <philb@gnu.org>
> Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
> To: openembedded-devel@lists.openembedded.org
> Date: Tuesday, January 12, 2010, 11:44 AM
> 
> 
> I would have thought the interconnect performance would be the least of
> your worries.  It seems that a rather bigger obstacle to running any
> kind of SMP on this hardware would be the issue that the two cores have
> different instruction sets: the DSP can't execute ARM code, and the ARM
> can't execute DSP code.
> 
> p.
> 
> On Tue, 2010-01-12 at 07:51 -0800, gagan singh wrote:
> > Hi Phil,
> >                
> > I thought general response time of any general application time will be faster.
> > Say Just getting a feeling of running General purpose Computer OS/applications  on a 1 GHz  processor while actually it is running on 500MHz CPU with SMP support(Keeping overhead time aside)
> >            DSP seems to remain idle most of the time while everything runs on Arm core.  You says difficult to implement on that sort Of Cores. Do the inter communication link/memory interface  is bottle neck for implementing shared workload.
> >  
> > regards
> >  
> > Gagan
> > 
> > 
> > --- On Tue, 1/12/10, Phil Blundell <philb@gnu.org> wrote:
> > 
> > 
> > From: Phil Blundell <philb@gnu.org>
> > Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
> > To: openembedded-devel@lists.openembedded.org
> > Date: Tuesday, January 12, 2010, 10:06 AM
> > 
> > 
> > On Tue, 2010-01-12 at 06:57 -0800, gagan singh wrote:
> > >                      Do the Angstrom version of Linux supports SMP for  Dual core (A8 + TI DSP 320C64x) beagle board. If not, where I should look in tutorial to work on adding support for such a feature.
> > >  I try Google it but no much could be located.
> > 
> > I'm not quite sure what you are trying to do here.  It's hard to imagine
> > how you could have any meaningful kind of "symmetric" multiprocessing on
> > that combination of cores.
> > 
> > What exactly are you hoping to achieve?
> > 
> > p.
> > 
> > 
> > 
> > _______________________________________________
> > Openembedded-devel mailing list
> > Openembedded-devel@lists.openembedded.org
> > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
> > 
> > 
> > 
> >       
> > _______________________________________________
> > Openembedded-devel mailing list
> > Openembedded-devel@lists.openembedded.org
> > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
> 
> 
> 
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
> 
> 
> 
>       
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel

Re: Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.

[Philip Balister]

On 01/13/2010 10:06 AM, gagan singh wrote:
> Hi Phil,
>              Thanks for the response.  So you recon Asynchronous Multi-Processing (AMP) concept is better suited in beagle board configuration.   If so what exactly I have to do in angstom to get such thing working.
>
> regards

Read up on dsplink, codec engine and dsp bridge. These are all packages 
for using the DSP from linux running on the ARM.

Philip


>
> Gagan
>
>
> --- On Tue, 1/12/10, Phil Blundell<philb@gnu.org>  wrote:
>
>
> From: Phil Blundell<philb@gnu.org>
> Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
> To: openembedded-devel@lists.openembedded.org
> Date: Tuesday, January 12, 2010, 11:44 AM
>
>
> I would have thought the interconnect performance would be the least of
> your worries.  It seems that a rather bigger obstacle to running any
> kind of SMP on this hardware would be the issue that the two cores have
> different instruction sets: the DSP can't execute ARM code, and the ARM
> can't execute DSP code.
>
> p.
>
> On Tue, 2010-01-12 at 07:51 -0800, gagan singh wrote:
>> Hi Phil,
>>
>> I thought general response time of any general application time will be faster.
>> Say Just getting a feeling of running General purpose Computer OS/applications  on a 1 GHz  processor while actually it is running on 500MHz CPU with SMP support(Keeping overhead time aside)
>>              DSP seems to remain idle most of the time while everything runs on Arm core.  You says difficult to implement on that sort Of Cores. Do the inter communication link/memory interface  is bottle neck for implementing shared workload.
>>
>> regards
>>
>> Gagan
>>
>>
>> --- On Tue, 1/12/10, Phil Blundell<philb@gnu.org>  wrote:
>>
>>
>> From: Phil Blundell<philb@gnu.org>
>> Subject: Re: [oe] Does OE’s Angstrom Linux support SMP (Symmetric multiprocessing) on beagle board.
>> To: openembedded-devel@lists.openembedded.org
>> Date: Tuesday, January 12, 2010, 10:06 AM
>>
>>
>> On Tue, 2010-01-12 at 06:57 -0800, gagan singh wrote:
>>>                        Do the Angstrom version of Linux supports SMP for  Dual core (A8 + TI DSP 320C64x) beagle board. If not, where I should look in tutorial to work on adding support for such a feature.
>>>    I try Google it but no much could be located.
>>
>> I'm not quite sure what you are trying to do here.  It's hard to imagine
>> how you could have any meaningful kind of "symmetric" multiprocessing on
>> that combination of cores.
>>
>> What exactly are you hoping to achieve?
>>
>> p.
>>
>>
>>
>> _______________________________________________
>> Openembedded-devel mailing list
>> Openembedded-devel@lists.openembedded.org
>> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
>>
>>
>>
>>
>> _______________________________________________
>> Openembedded-devel mailing list
>> Openembedded-devel@lists.openembedded.org
>> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
>
>
>
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
>
>
>
>
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel