Re: question about thread scheduling

Dear All,
there is any way to change the default priority of the main thread of an
application process?

thanks in advance
Zhiqiang
"Zhiqiang Li" <zhiqiang.li@xxxxxxxxxx> schrieb im Newsbeitrag
news:OBk93KvaHHA.4552@xxxxxxxxxxxxxxxxxxxxxxx
Hi Remi,
I realize that I have misunderstood what you have told me. Actually, what
you provided is the template for my implementation.
thanks a lot for your help!

Zhiqiang
"Remi de Gravelaine" <gravelaine at aton dash sys dot fr> schrieb im
Newsbeitrag news:OHk45G9ZHHA.4520@xxxxxxxxxxxxxxxxxxxxxxx
Zhiqiang,

You should try to tell us *exactly* what you want to do.
You should also avoid multiplying the discussion threads if you want
people to take care of you from the beginning.
If I understood what you want to do, you have implemented a polling loop
to do some job (what kind of job?) every 4ms.
You have put this loop in a high-priority thread started by the XXX_Init
function of a stream driver.
You are using CE 6.0 on a CEPC.

The loop should thus look like:

while (!g_bSuicide)
{
Sleep(3);
<do some job>
}

There is no reason that such a loop exits except when g_bSuicide is set
to TRUE (something that can be done in XXX_Deinit) or the <do some job>
code executes a break of goto intruction.

Now, why Sleep(3) instead of Sleep(4)? Because Sleep(3) will sleep for
*at least* 3 ms and because Sleep is synchonized on timer ticks, that
fire every ms (producing the SYSINTR_RESCHED you are focusing on.) So,
Sleep(3) returns from sleeping right after the third tick and a new 1ms
slice begins. You <do some job> during a portion of this slice and
reenter Sleep(3). Sleep(3) puts your thread to sleep for 3 timer ticks
and that means the time remaining in the current tick + 3 ms.

HTH
Remi





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