[Linrad] Setting priorities in Windows

[Joe Taylor <Princeton.EDU; joe@xxxxxxxxxxxxxxxx>]

Hi Leif,

I often find MS Windows extremely annoying, also.

I think you mis-understood the sign of the change I needed 
to make in setting Linrad's priority.  I wanted something 
less than "HIGH" but greater than "NORMAL".  It's very 
poorly documented, but eventually I found how to do it.  In 
Fortran it looks like this in the startup routine of WSJT:

   integer NORMAL_PRIORITY_CLASS,ABOVE_NORMAL_PRIORITY_CLASS
   parameter (NORMAL_PRIORITY_CLASS=32)
   parameter (ABOVE_NORMAL_PRIORITY_CLASS=32768)
   ...
   npri=NORMAL_PRIORITY_CLASS
   if(nhighpri.ne.0) npri=ABOVE_NORMAL_PRIORITY_CLASS
   m0=SetPriorityClass(GetCurrentProcess(),npri)

What I'm suggesting is that you give the user the option of 
setting n in the following statement to 32 ("normal"), 32868 
("above normal"), or maybe 128 ("high").  I do not recommend 
that you use REALTIME_PRIORITY_CLASS.  I think that is for 
very short interrupt routines.

   SetPriorityClass(GetCurrentProcess(), n);

	-- 73, Joe, K1JT

Leif Asbrink wrote:
> Hi Joe,
> 
>> I am running tests of MAP65-IQ with the following configuration:
>>
>> 1. SDR-IQ into Linrad;
>> 2. Linrad timf2 data via pseudo-network to MAP65-IQ
>>
>> Linrad and MAP65-IQ run on the same Windows computer.
>>
>> I have discovered that this system runs best with Linrad at 
>> "Above Normal" priority.  It does *not* run well with Linrad 
>> at "High" priority, which is what you get if you have 
>> "Process priority" set to 1 in par_userint.
>>
>> Does this make sense to you?  Would it be good to give the 
>> user this option, either instead of or in addition to "High" 
>> priority?
> I really do not know much about MS Windows. (And I am not
> really interested in spending much time on it.) Linrad uses
> SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
> in case the user wants high priority. I will allow the 
> ultimate call:
> SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS
> in the next Linrad version. Seems silly that such a thing 
> would be required. Did you try to set a more conservative (=lower)
> value for max DMA rate? 
> 
> 73
> 
> Leif / SM5BSZ
> 
> > 

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