[jhb_airlines] Re: Multicore

  • From: "Paul Reynolds" <paul@xxxxxxxxxxxxxxxxxxx>
  • To: <jhb_airlines@xxxxxxxxxxxxx>
  • Date: Fri, 22 Aug 2008 01:20:26 +0100


If leaving one core for the other stuff, have you specified cores 1, 2 and 3
for use by FSX?  To me this would seem the obvious as most programmes would
default to using the 0 core and you are moving FSX away from sharing the
core.  You could use the "affinity=0111" line in fsx.cfg, but there's a way
of associating almost any programme to use a specific core:

Start the programme then use 'Ctrl Alt Delete' and run the 'Task Manager'.
Click on the 'Processes' tab find 'fsx.exe' and right-click on it choose
'Set Affinity' from the menu and use the tick boxes to assign the cores you
want to use.  Note: you could use the same method to change the priority by
selecting 'Set Priority' instead.

WARNING:  Playing with these settings could easily cause your machine to
lock up.  If you assign a process to a core and it calls another, you could
get into trouble.  I'm confident it's safe to move the cores of FSX but
that's only because Aces went out of their way to design in the multi-core
support.  For other programmes, you might want to change the core it uses
but I would avoid using multi-core unless you are sure it can support it.


-----Original Message-----
From: jhb_airlines-bounce@xxxxxxxxxxxxx
[mailto:jhb_airlines-bounce@xxxxxxxxxxxxx] On Behalf Of Gerry Winskill
Sent: 21 August 2008 20:43
To: jhb_airlines@xxxxxxxxxxxxx
Subject: [jhb_airlines] Re: Multicore

The expert clearly is self appointed!

Why? Good question, unless it's application specific.

I use a tweak, involving a line in FSX.cfg, that allows the number of 
cores that FSX can address to be controlled. Depening on the value 
entered it can be 1, 2, 3 or 4. Mine is restricted to 3 and it has 
definitely improved performance. FSX can now use three cores but only 
three. That leaves the fourth core for other progs to use. One infidel 
said he only runs FSX. He may do but there are lots of background progs 
beyond our control. I'm assuming that the fourth, on my setup, is used 
by Active Sky, IVAO (?), fsc ETC.


F FISHER wrote:
> I buy, about once a month, the weekly Micro Mart.
> A recent articale asked of the resident 'experts'
> How do I disable one of my multicores in WinXP.
> The answer was, that it can be done in Vista, but not in WinXP.
> The next week, the 'expert' had to eat humblepie.
> Quote
> For Vista
> Goto Start/Run, and type msconfig, enter
> In the dialog box, click on the 'Boot' tab, then advanced options.
> You will see an option labelled'Number of Processors', you can then 
> select '1'
> For WinXP
> Virtually the same.
> Except click on 'Boot.ini' then on 'Advanced'
> An entry '/NUMPROC' will popup, then select from the dropdown menu..
> The option is in my WinXP setup.
> The 'expert' freely admits missing this.
> Why you would want to reduce your multicore, I do not know, but the 
> amount of software that would use it, is very small, could be to 
> accentuate compatiability??
> Frank F

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