2008-11-25 00:30:44     Tick Period - Scheduling

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2008-11-25 00:30:44     Tick Period - Scheduling

Sada M (INDIA)

Message: 65773   

 

Hi,

 

We set Tick Period as 10 msec.

 

 

 

We are using 2007 R1-RC3 Kernal.

 

1. How to set pre-emptive scheduling for the trheads in uClinux ?

 

2. in uClinux when the scheduler will run ? Will it run at every Tick period only or also when ever thre is any Semaphore/messages etc posted ?

 

3. How usleep(1000) ; 1 msec sleep is achived wtih above 10 msec tick period ? Will the scheduler runs at more granularity than the tick period specified ?

 

4. What will be the system/ kernal overhead by choosing tick period 1 msec instead 10 msec ?

 

Regards,

 

Sada.

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2008-11-25 19:44:51     Re: Tick Period - Scheduling

Robin Getz (UNITED STATES)

Message: 65805   

 

Sada:

 

It is the same as last time as we answered your co-workers a few weeks ago - go ask them.

 

http://www.opengroup.org/onlinepubs/009695399/functions/pthread_attr_getschedparam.html

 

-Robin

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