[Xenomai-help] switchtest fails with pthread_create: Cannot allocate memory

[Xenomai-help] switchtest fails with pthread_create: Cannot allocate memory

[Wolfgang Grandegger]

Hello,

when I try to run "switchtest" from the test-suite, I get the error

  "pthread_create: Cannot allocate memory"

on my MPC5200 PowerPC board. Some resource is exhausted and likely it's
system memory. I already realized heavy memory usage by threads using
the Xenomai POSIX skin. 

-bash-3.2# free      
             total       used       free     shared    buffers     cached
Mem:         61280      12044      49236          0          0       5796

-bash-3.2# ./switchtest rtk0 rtk0 rtup0 rtup0 rtus0 rtus0 rtuo0

-bash-3.2# free
             total       used       free     shared    buffers     cached
Mem:         61280      59700       1580          0          0       3932

Any idea what could cause the exhaustive use of memory? Is it the same on
x86? This test was  done with Linux 2.6.26 i-Pipe 2.2-07 and Xenomai 2.4.x
but it's the same with trunk.

Wolfgang.

Re: [Xenomai-help] switchtest fails with pthread_create: Cannot allocate memory

[Gilles Chanteperdrix]

Wolfgang Grandegger wrote:
> Hello,
> 
> when I try to run "switchtest" from the test-suite, I get the error
> 
>   "pthread_create: Cannot allocate memory"
> 
> on my MPC5200 PowerPC board. Some resource is exhausted and likely it's
> system memory. I already realized heavy memory usage by threads using
> the Xenomai POSIX skin. 
> 
> -bash-3.2# free      
>              total       used       free     shared    buffers     cached
> Mem:         61280      12044      49236          0          0       5796
> 
> -bash-3.2# ./switchtest rtk0 rtk0 rtup0 rtup0 rtus0 rtus0 rtuo0
> 
> -bash-3.2# free
>              total       used       free     shared    buffers     cached
> Mem:         61280      59700       1580          0          0       3932
> 
> Any idea what could cause the exhaustive use of memory? Is it the same on
> x86? This test was  done with Linux 2.6.26 i-Pipe 2.2-07 and Xenomai 2.4.x
> but it's the same with trunk.

It not is the stack size problem described in TROUBLESHOOTING ?

-- 
                                                 Gilles.

Re: [Xenomai-help] switchtest fails with pthread_create: Cannot allocate memory

[Wolfgang Grandegger]

Gilles Chanteperdrix wrote:
> Wolfgang Grandegger wrote:
>> Hello,
>>
>> when I try to run "switchtest" from the test-suite, I get the error
>>
>>   "pthread_create: Cannot allocate memory"
>>
>> on my MPC5200 PowerPC board. Some resource is exhausted and likely it's
>> system memory. I already realized heavy memory usage by threads using
>> the Xenomai POSIX skin. 
>>
>> -bash-3.2# free      
>>              total       used       free     shared    buffers     cached
>> Mem:         61280      12044      49236          0          0       5796
>>
>> -bash-3.2# ./switchtest rtk0 rtk0 rtup0 rtup0 rtus0 rtus0 rtuo0
>>
>> -bash-3.2# free
>>              total       used       free     shared    buffers     cached
>> Mem:         61280      59700       1580          0          0       3932
>>
>> Any idea what could cause the exhaustive use of memory? Is it the same on
>> x86? This test was  done with Linux 2.6.26 i-Pipe 2.2-07 and Xenomai 2.4.x
>> but it's the same with trunk.
> 
> It not is the stack size problem described in TROUBLESHOOTING ?

Well, RTFM, it seems to be exactly the problem described in there.
Setting "ulimit -s 2048" before starting "switchtest" helps.

Thanks.

Wolfgang.

Re: [Xenomai-help] switchtest fails with pthread_create: Cannot allocate memory

[Gilles Chanteperdrix]

Wolfgang Grandegger wrote:
> Gilles Chanteperdrix wrote:
>> Wolfgang Grandegger wrote:
>>> Hello,
>>>
>>> when I try to run "switchtest" from the test-suite, I get the error
>>>
>>>   "pthread_create: Cannot allocate memory"
>>>
>>> on my MPC5200 PowerPC board. Some resource is exhausted and likely it's
>>> system memory. I already realized heavy memory usage by threads using
>>> the Xenomai POSIX skin. 
>>>
>>> -bash-3.2# free      
>>>              total       used       free     shared    buffers     cached
>>> Mem:         61280      12044      49236          0          0       5796
>>>
>>> -bash-3.2# ./switchtest rtk0 rtk0 rtup0 rtup0 rtus0 rtus0 rtuo0
>>>
>>> -bash-3.2# free
>>>              total       used       free     shared    buffers     cached
>>> Mem:         61280      59700       1580          0          0       3932
>>>
>>> Any idea what could cause the exhaustive use of memory? Is it the same on
>>> x86? This test was  done with Linux 2.6.26 i-Pipe 2.2-07 and Xenomai 2.4.x
>>> but it's the same with trunk.
>> It not is the stack size problem described in TROUBLESHOOTING ?
> 
> Well, RTFM, it seems to be exactly the problem described in there.
> Setting "ulimit -s 2048" before starting "switchtest" helps.

What I do not understand is that switchtest sets the pthreads stack size
to 20K, so we should not have this problem...

-- 
					    Gilles.