Re: Pthread Priority
Re: Pthread Priority
- Subject: Re: Pthread Priority
- From: "Bill Lowrey" <email@hidden>
- Date: Wed, 20 Aug 2008 13:33:09 -0500
Hi,
That's interesting advice. If I recall correctly, SCHED_RR requires root on Linux (or, at least it used to). Is that the case on the Mac?
If not, it is actually closer to the behavior that I want in my app and I'd like to use it. My pthreads wrapper was initially written for Linux, and used SCHED_OTHER to avoid the root requirement. That has been a number of years ago.
Bill
On Wed, Aug 20, 2008 at 5:42 AM, Luca Ciciriello
<email@hidden> wrote:
Use the posix functions sched_get_priority_max(SCHED_OTHER); and sched_get_priority_min(SCHED_OTHER); to get the max and the min value supported by your system and then work within those values. Consider that on LINUX the priority max is 0, that is the min priority on MAC. Further I suggest to you to use on MAC the policy SCHED_RR.
Luca.
________________________________
> From: email@hidden
> To: email@hidden
> Date: Wed, 20 Aug 2008 16:01:51 +0800
> Subject: Pthread Priority
>
> Im porting a Linux app to the Mac and have the following code to set my thread priority? The results are not as expected Im I missing something?
>
>
> ...
> ...
> struct sched_param param;
> int policy = SCHED_OTHER;
>
>
> priority = VERY_HIGH;
>
>
> param.sched_priority = priority;
> pthread_setschedparam( pthread_self(), policy, ¶m );
> ...
> ...
>
>
> And I got the following def. for my priorities:
>
> VERY_LOW = 10,
> LOW = 5,
> NORMAL = 0,
> HIGH = -5,
> HIGH = -10
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