Community/Discussion/QNX Momentics Community Support/Make a process run on only one CPU/List of Posts
 
Forum Topic - Make a process run on only one CPU: (5 Items)
   
Update
Rodrigo Campos
05/27/2011 8:14 PM
post86229
Make a process run on only one CPU   
Hi,

I'm using QNX 6.5 and I want to make my program run on only one CPU (it uses pthreads). Does anybody knows how to do 
that ?

I've been looking though QNX 6.5 docn with "cpu affinity", taskset and that stuff, but I don not find anything.



Thanks!
Rodrigo
Elena Laskavaia
05/27/2011 11:07 PM
post86231
Re: Make a process run on only one CPU   
ThreadCtl(_NTO_TCTL_RUNMASK, mask)

Where mask is a bitfield of which cpus the thread is allowed to run on.


On 27/05/2011 8:14 PM, Rodrigo Campos wrote:
> Hi,
>
> I'm using QNX 6.5 and I want to make my program run on only one CPU (it uses pthreads). Does anybody knows how to do 
that ?
>
> I've been looking though QNX 6.5 docn with "cpu affinity", taskset and that stuff, but I don not find anything.
>
>
>
> Thanks!
> Rodrigo
>
>
>
> _______________________________________________
>
> QNX Momentics Community Support
> http://community.qnx.com/sf/go/post86229
>
Mario Charest
05/27/2011 11:17 PM
post86232
RE: Make a process run on only one CPU   
Or use the program "on" to launch your application.

-----Message d'origine-----
De : Elena Laskavaia [mailto:community-noreply@qnx.com] 
Envoyé : 27 mai 2011 23:07
À : momentics-community
Objet : Re: Make a process run on only one CPU

ThreadCtl(_NTO_TCTL_RUNMASK, mask)

Where mask is a bitfield of which cpus the thread is allowed to run on.


On 27/05/2011 8:14 PM, Rodrigo Campos wrote:
> Hi,
>
> I'm using QNX 6.5 and I want to make my program run on only one CPU (it uses pthreads). Does anybody knows how to do 
that ?
>
> I've been looking though QNX 6.5 docn with "cpu affinity", taskset and that stuff, but I don not find anything.
>
>
>
> Thanks!
> Rodrigo
>
>
>
> _______________________________________________
>
> QNX Momentics Community Support
> http://community.qnx.com/sf/go/post86229
>





_______________________________________________

QNX Momentics Community Support
http://community.qnx.com/sf/go/post86231
Rodrigo Campos
05/29/2011 12:40 AM
post86235
Re: RE: Make a process run on only one CPU   
Great, thanks a lot! :-D
Colin Burgess(deleted)
06/03/2011 11:57 PM
post86434
Re: Make a process run on only one CPU   
It should be noted that this will only set the calling thread's 
runmask.  If you want other threads to have the
same restriction, then you should set the runmask within those threads too.

As an alternative, you can use the _NTO_TCTL_RUNMASK_GET_AND_SET_INHERIT 
threadctl to set the current
thread's runmask in a way that it will be inherited by any future 
threads created.

On 11-05-27 8:07 PM, Elena Laskavaia wrote:
> ThreadCtl(_NTO_TCTL_RUNMASK, mask)
>
> Where mask is a bitfield of which cpus the thread is allowed to run on.
>
>
> On 27/05/2011 8:14 PM, Rodrigo Campos wrote:
>> Hi,
>>
>> I'm using QNX 6.5 and I want to make my program run on only one CPU (it uses pthreads). Does anybody knows how to do 
that ?
>>
>> I've been looking though QNX 6.5 docn with "cpu affinity", taskset and that stuff, but I don not find anything.
>>
>>
>>
>> Thanks!
>> Rodrigo
>>
>>
>>
>> _______________________________________________
>>
>> QNX Momentics Community Support
>> http://community.qnx.com/sf/go/post86229
>>
>
>
>
>
> _______________________________________________
>
> QNX Momentics Community Support
> http://community.qnx.com/sf/go/post86231
>

-- 
cburgess@qnx.com

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