[Bf-committers] Pretty clueless Linux threads crashing...

Ton Roosendaal ton at blender.org
Fri Feb 24 10:28:34 CET 2006

Hi Chris,

Aah! The volatile trick again... I spent some time reading about it,  
and it seems to be recommended to use especially when coding threads.

This is a nice read;

I'm still unsure which variables would be the best candidates to become  
volatile... but I know a couple of important ones that I could try  



On 24 Feb, 2006, at 1:02, Chris Want wrote:

> Ton Roosendaal wrote:
>> Hi,
>> I suspected scanline updating from crashing... it was reported to  
>> crash  less frequent then, but that's not the solution. Apparently  
>> I've put a  little bit too much efforts to limit code for update  
>> scanlines! So yes,  it skips the 2nd thread tile drawing. Will be  
>> brought back.
>> We did tests a couple of days on irc with this .blend:
>> http://www.blender.org/bf/untitled-1.blend
>> Not sure if it still crashes, it seems to only happen every 10 frames  
>>  or so. So just press ANIM on it.
>> -Ton-
> I got the crashes too with that file (takes
> about 70-90 frames here).
> Valgrind was giving me some inconsistent info,
> so I start to play with the optimization levels.
> I find that if I set the optimization for linux
> to -O0 and then touch threads.c and all the stuff
> in render/intern/source, then type "make", blender
> no longer crashes. At -O1 it still crashes.
> Regards,
> Chris
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Ton Roosendaal  Blender Foundation ton at blender.org  

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