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Quasar
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Posts: 2133
Registered: 08-00

If you have a multicore processor, the Windows versions of SDL-based DOOM ports may suffer random sound-related crashes.

To fix this, you need to check out the instructions on this page:

http://articles.techrepublic.com.co...11-6168870.html

This will enable you to set the processor affinity for the port in question, allowing it to behave like it is executing on a single-core processor. This appears to eliminate SDL_mixer's unexplained problems with running on a separate core.

Addendum:

For port authors, it may be prudent to look up information on the SetProcessAffinityMask Windows API function:
http://msdn2.microsoft.com/en-us/li...223(VS.85).aspx

Last edited by Quasar on 03-01-08 at 05:11

03-01-08 05:04 #

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fraggle
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Posts: 4247
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PrBoom-plus and Chocolate Doom already have a fix for this that entryway developed :-)

03-01-08 05:10 #

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Quasar
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fraggle said:
PrBoom-plus and Chocolate Doom already have a fix for this that entryway developed :-)

Care to share the details? ;)

03-01-08 05:11 #

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fraggle
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Quasar said:

Care to share the details? ;)

This is the commit to the Chocolate Doom svn.

03-01-08 05:19 #

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entryway
Senior Member

Posts: 1180
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http://www.doomworld.com/vb/showthr...2425#post692425

http://pastebin.com/m69510e52

Last edited by entryway on 03-01-08 at 09:17

03-01-08 08:46 #

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Quasar
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Thanks guys ;)

03-01-08 18:02 #

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Csonicgo
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Has this been added to EE yet?

05-21-08 18:37 #

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Quasar
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Not yet, it'll be in the next official release though.

05-21-08 18:44 #

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entryway
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Posts: 1180
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Quasar said:
Not yet, it'll be in the next official release though.

You should fix such things more quickly IMHO (immediately?), because it is impossible to use your port on all up to date (most?) systems. 3.33.33.1 would be cool in the same day you got to know it.

Look at this and replace "prboom" with "Eternity"
http://www.doomworld.com/vb/showthr...9166#post699166

Last edited by entryway on 05-22-08 at 11:43

05-22-08 10:02 #

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Quasar
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I should ;)

One question I have is still outstanding, however. It is possible for Windows machines to have access denied to particular users to run processes on a given CPU. If this is the case, then the system processor affinity mask may not be "1" or "2" or any other particular value. While it is unlikely that this would affect the vast majority of DOOM source port users, I'd like to know why the approach of just using "1" as the process's affinity mask is valid when MSDN docs demand that you make certain the mask you set is a subset of the system mask. :)

I can imagine that the consequences of setting the affinity mask to an invalid value would be an application stall or crash, or at the least, failure to actually do anything at all.

05-22-08 18:33 #

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entryway
Senior Member

Posts: 1180
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I do not use 1 as constant, I use process_affinity_mask variable from cfg and you can set it to any value. 1 is by default and it means the first processor. Is it possible when the first processor is not allowed, but some other is allowed? I assumed there is no such possibility. In any case if SetProcessAffinityMask failed you can see it in stdout.txt:

code:M_LoadDefaults: Load system defaults.
 default file: D:\games\Doom2/glboom-plus.cfg
 found D:\games\Doom2/prboom-plus.wad
I_SetAffinityMask: failed to set process affinity mask (errorcode: 87)

With wrong process_affinity_mask GetLastError() will return 87 - "The parameter is incorrect"

Last edited by entryway on 05-22-08 at 21:27

05-22-08 21:16 #

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