Re: [Algorithms] Timing problems

[Gregory J. <gj...@da...>]

Sorry, that's what I get for posting right when I wake up.Emil had the
correct version; since it's a bitmask, you indicate the zero'th core with a
1. 


Greg

 

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From: Gregory Junker [mailto:gj...@da...] 
Sent: Sunday, January 04, 2009 10:07 AM
To: 'Game Development Algorithms'
Subject: Re: [Algorithms] Timing problems

 

Correct.


Greg

 

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From: Paul at Home [mailto:pa...@ru...] 
Sent: Sunday, January 04, 2009 3:44 AM
To: Game Development Algorithms
Subject: Re: [Algorithms] Timing problems

 

I've seen this around but I'm not using any threads. Not deliberately
anyway. Do you put a zero in for "me" ?


Regards,
Paul Johnson.

 

 

----- Original Message ----- 

From: Gregory Junker <mailto:gj...@da...>  

To: 'Game Development Algorithms'
<mailto:gda...@li...>  

Sent: Sunday, January 04, 2009 2:07 AM

Subject: Re: [Algorithms] Timing problems

 

Hi Paul

 

By "jump problem", do you mean this?

 

http://support.microsoft.com/kb/274323

 

 

Either way, simply set the thread that is your time master to run on only a
single core, using SetThreadAffinityMask() (on Win32, of course - not sure
what the equivalent, if any, might be on Linux). 

 

http://msdn.microsoft.com/en-us/library/ms686247(VS.85).aspx

 

 

Yes, it's a hack, but at present, it's what we got. ;)


Greg

 


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From: Paul at Home [mailto:pa...@ru...] 
Sent: Saturday, January 03, 2009 3:06 PM
To: gda...@li...
Subject: [Algorithms] Timing problems

 

I've just fallen foul of QPC not working correctly having just gone from a
single processor to a quad core.

 

I remember reading somewhere that multiple processors could cause problems
in the future, but I guess the future (for me) just arrived. I do handle the
well-known "jump" problem but I guess that's old news now anyway.

 

Can anyone point me in the right direction for how to fix this please ?


Regards,
Paul Johnson.

 

 


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