Le 13/10/2011 18:16, borg(a)uu3.net a écrit :
> May I ask on what system you did the tests?
XP sp3 on a dual core 2.2 GHz centrino duo laptop.
>
> I can say that I didnt noticed this problem of slowing down
> until I upgraded.
> On my previous configuration (Win2000, running on P3 800) zeth
> (Doom Editor) was fast and worked very well.
> After upgrade (Win2003 running on i5-760) I noticed strange slow downs.
In fact I am embarassed and I cannot make my mind on what you say.
You are right that some defects arise from the DOS roots of grx.
For example you suppress Sleep(10) in GrMouseGetEventT() in w32inp.c.
This garbles completely the way this function works. Its purpose is to
wait until an event arrives or a maximum delay "tout" has elapsed. You
suppress the delay. If you compare with the same function in dosinput.c
you see that in both cases the function enter in an infinite loop. It
exits either because an event is arrived meanwhile through an interrupt
or because the maximum delay has occured. In DOS the delay is measured
at the end of each loop through the function real_dtime(), and the loop
blocks everything except interrupts meanwhile. In win32 the delay is
measured in chunks of 10ms through Sleep(10) you have suppressed, rather
than through an true measure of time, and this enables to yield meanwhile.
This basically indicates some hesitation between a polling and an
interrupt functioning of the program. The former, acceptable in DOS is
catastrophic in windows.
>
> PS: I found another race condition in painter btw, leaving atrifacts
> on screen. Again its SMP related and I fixed it. I dont like a fix
> but again, it gave excelent results (no high CPU or lag).
> I can share if interested...
Certainly I am interested
Maurice
--
Maurice Lombardi
Laboratoire Interdisciplinaire de Physique,
(ex Spectrometrie Physique)
Universite Joseph Fourier de Grenoble, BP87
38402 Saint Martin d'Heres Cedex FRANCE
Tel: 33 (0)4 76 51 47 51
Fax: 33 (0)4 76 63 54 95
mailto:Maurice.Lombardi@ujf-grenoble.fr
