27.07.2010, 19:50
If it is commented out the OS will decide which cores to use. ie All cores.
"IL-2 is not a ,multithread application." True
IL-2 only uses 1 core" False.
so PAF....
=1 - core 0
=2 - core 1
=3 - core 0+1
=4 - core 2
=5 - core 0+2
=6 - core 1+2
=7 - core 0+1+2
=8 - core 3
=9 - core 0 + 3
=10 - core 1 + 3
=11 - core 0 + 2 + 3
=12 - core 2 + 3
=13 - core 0 + 2 + 3
=14 - core 1 + 2 + 3
=15 - core 0 + 1 + 2 + 3
commented out - all cores
If a core is enabled, it does NOT mean that core will be performing 100% while the other cores that are not enabled do nothing.
The enabled core needs an active thread to perform,
The disabled cores will be assigned tasks by the OS if needed.
There is only one way to switch off cores - the power switch - meaning all or nothing lol.
There was an long thread at SimHQ some time back exploring this(end 2005/beginning of 2006).
An understanding of binary bit system will help with the next section.
Binary is simply an on/off value for a particular bit location.
It is read from right to left as follows:
0_0_0_1_1_1 = 7 Binary
32 16 8 4 2 1 = 1+2+4 = 7 Decimal equivalent
As seen, this value of 7 would enable cores 0 1 and 2 (first, second and third cores on a 4 core system).
a '1' bit will enable the core, a '0' bit disables it.
Actual activity of cores can be checked through TaskManager. Keep in mind in general Windows OS runs hundreds of threads at the same time IL-2 runs.
A substantial part of IL-2 is written in Java which can use in excess of 100 threads. (source: Sun Microsystems) Shift-Tab opens the Java console in-game Yep that's where all those white messages come from.
Bitmask: 00000 = Decimal 0
Processor affinity is off, and the load is distributed across all available processors.
Bitmask: 00001 = Decimal 1
Processor 1 selected. The process will only run on processor 1.
Bitmask: 00010 = Decimal 2
Processor 2 selected. The process will only run on processor 2.
Bitmask: 00011 = Decimal 3
Processors 1 & 2 selected. The load is distributed across both processors, effectively the same as setting 0 above for Dual cores.
Because 0 puts the load across all processors and 3 puts the load on processor 1 and 2, they are essentially the same thing for Dual core CPUs.
For Quad core CPUs you can use more values:
Bitmask: 00100 = Decimal 4
Processor 3 selected. The process will only run on processor 3.
Bitmask: 01000 = Decimal 8
Processor 4 selected. The process will only run on processor 4.
And any combo between 0 and 15, for example:
Bitmask: 00101 = Decimal 5
Processor 1 and 3 selected. The load is distributed across processor 1 and 3.
Bitmask: 01111 = Decimal 15
Processor 1, 2, 3, and 4 selected. The load is distributed across all processors, 1, 2, 3, and 4.
Get the picture?
Basically, using a multi core processor in IL-2 has no real performance gain when you're talking about just the game, but........
If you use a multicore processor and assign different programs to each core, you get incredible results.
ie. I use an AMD Phenom 9850 quad core with the following settings.
IL-2 is running on Core 4
TS is running on Core 3
HL is running on Core 2
Windows uses Core 1
This is what processor affinity will do for you. Take the load off of the core that you're using for the game by assigning the game to use a core that isn't normally used. Windows, by default, will always try to use the first core (Core 0).
Here is a my guide for understanding and using the conf.ini file:
De-Mystifying the Conf.ini
viewtopic.php?f=29&t=29185&p=331280#p331280
Another way to assign IL-2, and all your other programs, to specific cores is to use a program like PsExec. It is available here: http://technet.microsoft.com/en-us/sysin...97553.aspx.
You will simply install the program and then run like this...
1.) Right click on the shortcut icon for the program you wish to modify. ie IL-2 1946.
2.) Click on the "Target" box.
3.) Add the appropriate modifiers to the beginning of the call. In the case of IL-2 it would look something like this:
psexec -a 2 "C:\IL-2 Sturmovik 1946\il2fb.exe"
This will cause IL-2 to run on processor 2.
*** Remember to use the FULL path. For long file names with spaces in them, you must use quotes "" around the path other wise they are optional.
"IL-2 is not a ,multithread application." True
IL-2 only uses 1 core" False.
so PAF....
=1 - core 0
=2 - core 1
=3 - core 0+1
=4 - core 2
=5 - core 0+2
=6 - core 1+2
=7 - core 0+1+2
=8 - core 3
=9 - core 0 + 3
=10 - core 1 + 3
=11 - core 0 + 2 + 3
=12 - core 2 + 3
=13 - core 0 + 2 + 3
=14 - core 1 + 2 + 3
=15 - core 0 + 1 + 2 + 3
commented out - all cores
If a core is enabled, it does NOT mean that core will be performing 100% while the other cores that are not enabled do nothing.
The enabled core needs an active thread to perform,
The disabled cores will be assigned tasks by the OS if needed.
There is only one way to switch off cores - the power switch - meaning all or nothing lol.
There was an long thread at SimHQ some time back exploring this(end 2005/beginning of 2006).
An understanding of binary bit system will help with the next section.
Binary is simply an on/off value for a particular bit location.
It is read from right to left as follows:
0_0_0_1_1_1 = 7 Binary
32 16 8 4 2 1 = 1+2+4 = 7 Decimal equivalent
As seen, this value of 7 would enable cores 0 1 and 2 (first, second and third cores on a 4 core system).
a '1' bit will enable the core, a '0' bit disables it.
Actual activity of cores can be checked through TaskManager. Keep in mind in general Windows OS runs hundreds of threads at the same time IL-2 runs.
A substantial part of IL-2 is written in Java which can use in excess of 100 threads. (source: Sun Microsystems) Shift-Tab opens the Java console in-game Yep that's where all those white messages come from.
Bitmask: 00000 = Decimal 0
Processor affinity is off, and the load is distributed across all available processors.
Bitmask: 00001 = Decimal 1
Processor 1 selected. The process will only run on processor 1.
Bitmask: 00010 = Decimal 2
Processor 2 selected. The process will only run on processor 2.
Bitmask: 00011 = Decimal 3
Processors 1 & 2 selected. The load is distributed across both processors, effectively the same as setting 0 above for Dual cores.
Because 0 puts the load across all processors and 3 puts the load on processor 1 and 2, they are essentially the same thing for Dual core CPUs.
For Quad core CPUs you can use more values:
Bitmask: 00100 = Decimal 4
Processor 3 selected. The process will only run on processor 3.
Bitmask: 01000 = Decimal 8
Processor 4 selected. The process will only run on processor 4.
And any combo between 0 and 15, for example:
Bitmask: 00101 = Decimal 5
Processor 1 and 3 selected. The load is distributed across processor 1 and 3.
Bitmask: 01111 = Decimal 15
Processor 1, 2, 3, and 4 selected. The load is distributed across all processors, 1, 2, 3, and 4.
Get the picture?
Basically, using a multi core processor in IL-2 has no real performance gain when you're talking about just the game, but........
If you use a multicore processor and assign different programs to each core, you get incredible results.
ie. I use an AMD Phenom 9850 quad core with the following settings.
IL-2 is running on Core 4
TS is running on Core 3
HL is running on Core 2
Windows uses Core 1
This is what processor affinity will do for you. Take the load off of the core that you're using for the game by assigning the game to use a core that isn't normally used. Windows, by default, will always try to use the first core (Core 0).
Here is a my guide for understanding and using the conf.ini file:
De-Mystifying the Conf.ini
viewtopic.php?f=29&t=29185&p=331280#p331280
Another way to assign IL-2, and all your other programs, to specific cores is to use a program like PsExec. It is available here: http://technet.microsoft.com/en-us/sysin...97553.aspx.
You will simply install the program and then run like this...
1.) Right click on the shortcut icon for the program you wish to modify. ie IL-2 1946.
2.) Click on the "Target" box.
3.) Add the appropriate modifiers to the beginning of the call. In the case of IL-2 it would look something like this:
psexec -a 2 "C:\IL-2 Sturmovik 1946\il2fb.exe"
This will cause IL-2 to run on processor 2.
*** Remember to use the FULL path. For long file names with spaces in them, you must use quotes "" around the path other wise they are optional.
at the front of the ProcessAffinityMask