Re: [proaudio] realtime problems (maybe pam)

[Frieder Bürzele <evermind@xxxxxxxxxxxxx>]

Kjetil S. Matheussen wrote:
> 
> 
> On Thu, 2 Oct 2008, Frieder Bürzele wrote:
> 
>> Kjetil S. Matheussen wrote:
>>>
>>>
>>> On Wed, 1 Oct 2008, Frieder Bürzele wrote:
>>>
>>>> Kjetil S. Matheussen wrote:
>>>>> On Wed, 1 Oct 2008, Frieder Bürzele wrote:
>>>>>
>>>>>> Mysth-R wrote:
>>>>>>> are you in the audio group ?
>>>>>>> Check on the /etc/group file.
>>>>>> yes
>>>>>>
>>>>>
>>>>> I have given up messing around with this pam/rt_limits/etc. thing, and
>>>>> just manually forced the kernel to let me do what I want:
>>>>>
>>>>> http://archive.notam02.no/arkiv/src/realtime.diff
>>>>>
>>>>> Much easier.
>>>>>
>>>>>
>>>>>
>>>> I've applied your patch, what else I've to do? disable pam?
>>>> I still can't get realtime to work
>>>>
>>>
>>> I don't know. That should be it. The patch just
>>> shortcuts all other methods and just say yes
>>> to everyone for all requests about scheduling property,
>>> nice values and memory locking.
>>>
>>> It's definitely interesting that you still can't get
>>> realtime to work, but I have no idea why. At least
>>> you now know that there was probably nothing wrong
>>> with pam before.
>>>
>>> But are you really sure realtime does not work?
>>> How do you know?
>>> (I seem to have deleted the mails in this thread)
>>
>> jack gives me that
>>
>> jackd -R -dalsa
>>
>> jackd 0.112.1
>> Copyright 2001-2005 Paul Davis and others.
>> jackd comes with ABSOLUTELY NO WARRANTY
>> This is free software, and you are welcome to redistribute it
>> under certain conditions; see the file COPYING for details
>>
>> JACK compiled with System V SHM support.
>> cannot use real-time scheduling (FIFO at priority 10) [for thread
>> 1808877296, from thread 1808877296] (1: Operation not permitted)
>> cannot create engine
>>
> 
> Hmm, maybe I have misunderstood how pam works...
> 
> Can you try this program?
> 
> 
> #include <sched.h>
> #include <stdio.h>
> 
> int main(){
>   struct sched_param par={0};
>   par.sched_priority=99;
>   if((sched_setscheduler(0,SCHED_FIFO,&par)!=0))
>     printf("Not realtime\n");
>   else
>     printf("Realtime\n");
>   return 0;
> }

"Not realtime" is the reply