| Re: [proaudio] realtime problems (maybe pam) |
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Frieder Bürzele wrote:
> 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
>
>
btw. ulimit -a shows:
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 40
file size (blocks, -f) unlimited
pending signals (-i) 26109
max locked memory (kbytes, -l) 500000
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 99
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 26109
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited