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From: Gena
Subject: Dual Processor
Date: 13 Dec 2002 14:17:13
Message: <3DFA3237.11DDBAAE@mail.com>
I ran standard POV-Ray 3.5 as the only task on dual processor machine
under Windows XP. Does that mean that it will use both processors ?
Should I use any non-official build to utilize both processors (PVMPOV
or smth. like that)?

Gena.


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From: Thorsten Froehlich
Subject: Re: Dual Processor
Date: 13 Dec 2002 14:42:12
Message: <3dfa3814$1@news.povray.org>
In article <3DFA3237.11DDBAAE@mail.com> , Gena <obu### [at] mailcom>  wrote:

> I ran standard POV-Ray 3.5 as the only task on dual processor machine
> under Windows XP. Does that mean that it will use both processors ?

Read the manual, section "9.1.3.2 Can POV-Ray use multiple processors?"

> Should I use any non-official build to utilize both processors (PVMPOV
> or smth. like that)?

If you want to.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org


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From: Rick [Kitty5]
Subject: Re: Dual Processor
Date: 13 Dec 2002 17:44:24
Message: <3dfa62c8$1@news.povray.org>
Thorsten Froehlich wrote:
> In article <3DFA3237.11DDBAAE@mail.com> , Gena <obu### [at] mailcom>
> wrote:
>
>> I ran standard POV-Ray 3.5 as the only task on dual processor machine
>> under Windows XP. Does that mean that it will use both processors ?
>
> Read the manual, section "9.1.3.2 Can POV-Ray use multiple
> processors?"

Then post in p.g asking 'SMP.... When.....'
--

Rick

Kitty5 NewMedia http://Kitty5.co.uk
POV-Ray News & Resources http://Povray.co.uk
TEL : +44 (01270) 501101 - FAX : +44 (01270) 251105 - ICQ : 15776037

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From: Gena
Subject: Re: Dual Processor
Date: 20 Dec 2002 20:34:12
Message: <3E03C50E.A13D0D0E@mail.com>
Is there any trick which I should use if I want to start many instances of
POV-Ray under Windows XP ? It looks like I cannot do that just clicking
shortcut. It always brings up the first copy.

Gena.


Thorsten Froehlich wrote:

> In article <3DFA3237.11DDBAAE@mail.com> , Gena <obu### [at] mailcom>  wrote:
>
> > I ran standard POV-Ray 3.5 as the only task on dual processor machine
> > under Windows XP. Does that mean that it will use both processors ?
>
> Read the manual, section "9.1.3.2 Can POV-Ray use multiple processors?"
>
> > Should I use any non-official build to utilize both processors (PVMPOV
> > or smth. like that)?
>
> If you want to.
>
>     Thorsten
>
> ____________________________________________________
> Thorsten Froehlich, Duisburg, Germany
> e-mail: tho### [at] trfde
>
> Visit POV-Ray on the web: http://mac.povray.org


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From: Christopher James Huff
Subject: Re: Dual Processor
Date: 20 Dec 2002 21:15:35
Message: <chrishuff-2A71E9.21102920122002@netplex.aussie.org>
In article <3E03C50E.A13D0D0E@mail.com>, Gena <obu### [at] mailcom> wrote:

> Is there any trick which I should use if I want to start many instances of
> POV-Ray under Windows XP ? It looks like I cannot do that just clicking
> shortcut. It always brings up the first copy.

I think unchecking "Keep Single Instance" in the Options menu will give 
the behavior you want.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/


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From: Rick [Kitty5]
Subject: Re: Dual Processor
Date: 21 Dec 2002 07:40:51
Message: <3e046153$1@news.povray.org>
Christopher James Huff wrote:
> In article <3E03C50E.A13D0D0E@mail.com>, Gena <obu### [at] mailcom>
> wrote:
>
>> Is there any trick which I should use if I want to start many
>> instances of POV-Ray under Windows XP ? It looks like I cannot do
>> that just clicking shortcut. It always brings up the first copy.
>
> I think unchecking "Keep Single Instance" in the Options menu will
> give the behavior you want.

Just remember to assign each instance of povray to a seperate CPU in task
manager before you start rendering

--

Rick

Kitty5 NewMedia http://Kitty5.co.uk
POV-Ray News & Resources http://Povray.co.uk
TEL : +44 (01270) 501101 - FAX : +44 (01270) 251105 - ICQ : 15776037

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From: Warp
Subject: Re: Dual Processor
Date: 21 Dec 2002 08:45:52
Message: <3e04708f@news.povray.org>
Rick [Kitty5] <ric### [at] kitty5com> wrote:
> Just remember to assign each instance of povray to a seperate CPU in task
> manager before you start rendering

  It would be incredibly stupid multitasking from WinXP if it
assigned two extremely heavy processes to the same processor, while the
other processor is mostly idle.
  I don't believe that even MS can do things that bad.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


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From: Rick [Kitty5]
Subject: Re: Dual Processor
Date: 21 Dec 2002 13:56:39
Message: <3e04b967@news.povray.org>
Warp wrote:
> Rick [Kitty5] <ric### [at] kitty5com> wrote:
>> Just remember to assign each instance of povray to a seperate CPU in
>> task manager before you start rendering
>
>   It would be incredibly stupid multitasking from WinXP if it
> assigned two extremely heavy processes to the same processor, while
> the other processor is mostly idle.
>   I don't believe that even MS can do things that bad.

It dosnt know a process is going to be a heavy one when it decides which
processor it will be running on, it just sticks it on the CPU that at that
instant has less load.

--

Rick

Kitty5 NewMedia http://Kitty5.co.uk
POV-Ray News & Resources http://Povray.co.uk
TEL : +44 (01270) 501101 - FAX : +44 (01270) 251105 - ICQ : 15776037

PGP Public Key
http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x231E1CEA


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From: Warp
Subject: Re: Dual Processor
Date: 21 Dec 2002 15:26:59
Message: <3e04ce93@news.povray.org>
Rick [Kitty5] <ric### [at] kitty5com> wrote:
> It dosnt know a process is going to be a heavy one when it decides which
> processor it will be running on, it just sticks it on the CPU that at that
> instant has less load.

  You mean it can't switch a process from one processor to another on
the fly?-o
  That's hard to believe (no matter how much I would like to believe
something like that from MS). AFAIK that doesn't involve anything
complicated for a multitasking manager.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


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From: Thorsten Froehlich
Subject: Re: Dual Processor
Date: 21 Dec 2002 15:36:45
Message: <3e04d0dd@news.povray.org>
In article <3e04b967@news.povray.org> , "Rick [Kitty5]" <ric### [at] kitty5com> 
wrote:

>>   It would be incredibly stupid multitasking from WinXP if it
>> assigned two extremely heavy processes to the same processor, while
>> the other processor is mostly idle.
>>   I don't believe that even MS can do things that bad.
>
> It dosnt know a process is going to be a heavy one when it decides which
> processor it will be running on, it just sticks it on the CPU that at that
> instant has less load.

No, that isn't how scheduling works.  The next process in the queue will
always be scheduled on the next processor available.  It would be a lot more
difficult to implement it any other way.  And in fact the performance
problems one may get when using the P4 SMT feature suggest that this works
the same on WinDOS.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org


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