[Stk] rtaudio - priority and keyboard events

[TJF]

Hi,

if I do chrt -p PID, I get

... current scheduling policy: SCHED_OTHER
... current scheduling priority: 0    // i.e. "options.priority = 15;"

Starting the program with

chrt 65 ...

I get:
... current scheduling policy: SCHED_RR
... current scheduling priority: 0    // i.e. "options.priority = 65;"


Regards
Thomas


Am 22.08.2012 16:44, schrieb TJF:
> Hi Gary,
>
> I did this:
>
> //------------------------------------------------
>
> RtAudio::StreamOptions options;
>   options.flags = RTAUDIO_MINIMIZE_LATENCY;
>   options.flags = RTAUDIO_SCHEDULE_REALTIME;
>   options.flags = RTAUDIO_HOG_DEVICE;
>   options.flags = RTAUDIO_ALSA_USE_DEFAULT;
>   options.numberOfBuffers = 2;
>   options.priority = max;
>
>
> std::cout << "\nPriority min: " << min << std::endl;
> std::cout << "\nPriority max: " << max << std::endl;
>
> // min and max are 1 and 99 ...
>
> struct sched_param sched_p;
>   //std::cout << "\nPriority IST: " << sched_getparam(getpid(), 
> &sched_p) << std::endl;
>   std::cout << "\nPriority IST: " << sched_getparam(0, &sched_p) << 
> std::endl;
>
> //------------------------------------------------
>
> For the last line I get always "0". I is in an Linux environment with 
> RT-Kernel (only command-line OS). The same with another "normal" 
> Kernel and XFCE... The task manager also shows "0".
>
> Do you have any idea?
>
> Regards
> Thomas
>
>
> Am 16.08.2012 06:57, schrieb Gary Scavone:
>> Hi Tomas,
>>
>> The "priority" option is only used if you also set the RTAUDIO_SCHEDULE_REALTIME flag.  The priority value (a number) corresponds to the linux realtime scheduling system … I can't remember the valid range of values, though whatever you provide is checked against:
>>
>>        int min = sched_get_priority_min( SCHED_RR );
>>        int max = sched_get_priority_max( SCHED_RR );
>>
>> Regards,
>>
>> --gary
>>
>> On 2012-08-13, at 9:41 AM, TJF<tjfoerster at web.de>  wrote:
>>
>>> Hi everybody,
>>>
>>> I am changing some things to bring my Windows application to Linux. I want to use the StreamOption "priority".
>>>
>>> Am I right to to use it this way (the second line)? May be also a second process -  the process name of my application?
>>>
>>> RtAudio::StreamOptions options;
>>> options.priority =  ALSA;
>>>
>>> My other question: In Windows I used system keyboard events like this to control the command-line app from outside:
>>>
>>> (Ctrl+o)
>>> if(GetAsyncKeyState(VK_CONTROL)&&GetAsyncKeyState(0x4F))
>>>              {
>>>                 ...
>>>              }
>>>
>>> For Linux I couln't find something similar. What would be a "light-weight" solution: Using SDL (only keyboard-events)?
>>>
>>> Thanks a lot!
>>> Regards
>>> Thomas
>>> _______________________________________________
>>> Stk mailing list
>>> Stk at ccrma.stanford.edu
>>> http://ccrma-mail.stanford.edu/mailman/listinfo/stk
>
>
>
> _______________________________________________
> Stk mailing list
> Stk at ccrma.stanford.edu
> http://ccrma-mail.stanford.edu/mailman/listinfo/stk
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://ccrma-mail.stanford.edu/pipermail/stk/attachments/20120823/fd667047/attachment.html