POV-Ray : Newsgroups : povray.windows : WIndows 7 multi-core operation Server Time
26 Feb 2024 08:22:38 EST (-0500)
  WIndows 7 multi-core operation (Message 1 to 4 of 4)  
From: JayWiz
Subject: WIndows 7 multi-core operation
Date: 21 Jan 2009 22:40:00
Message: <web.4977e9e71c8d05126dba9e5f0@news.povray.org>
I installed POVRay 3.7 Beta 30 on a Windows 7 Beta and the benchmark (all cores)
runs well. All other traces run with a single thread. I have checked and the
thread setting is at 4. Is this Windows or just the POVRay install...

Jay


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From: Chris Cason
Subject: Re: WIndows 7 multi-core operation
Date: 24 Jan 2009 08:16:59
Message: <497b14cb@news.povray.org>
JayWiz wrote:
> I installed POVRay 3.7 Beta 30 on a Windows 7 Beta and the benchmark (all cores)
> runs well. All other traces run with a single thread. I have checked and the
> thread setting is at 4. Is this Windows or just the POVRay install...

this is interesting. what does the messages pane say at at startup about
the CPU? Just after the message about it being a time-limited beta test,
there is another section mentioning the tools menu and the CPU. For example:

  Loaded 8 tools into Tool Menu.
  Detected 2 CPU's providing 8 physical cores and 8 logical ones.

I would like to know the latter for your install.

(Also, what information are you using to determine the traces run with a
single thread? Observation of CPU load, or some other data?)

-- Chris


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From: JayWiz
Subject: Re: WIndows 7 multi-core operation
Date: 26 Jan 2009 07:00:00
Message: <web.497da526835cc853db9c0890@news.povray.org>
Chris Cason <del### [at] deletethistoopovrayorg> wrote:
> JayWiz wrote:
> > I installed POVRay 3.7 Beta 30 on a Windows 7 Beta and the benchmark (all cores)
> > runs well. All other traces run with a single thread. I have checked and the
> > thread setting is at 4. Is this Windows or just the POVRay install...
>
> this is interesting. what does the messages pane say at at startup about
> the CPU? Just after the message about it being a time-limited beta test,
> there is another section mentioning the tools menu and the CPU. For example:
>
>   Loaded 8 tools into Tool Menu.
>   Detected 2 CPU's providing 8 physical cores and 8 logical ones.
>
> I would like to know the latter for your install.
>
> (Also, what information are you using to determine the traces run with a
> single thread? Observation of CPU load, or some other data?)
>
> -- Chris

It does not show number of cores found. just this:
--------------------
Loaded 8 tools into Tool Menu
--------------------
THe thread count in the message window is what I was using, but I also installed
a gadget that showed core activity. The first day I ran it, it showed running on
1 thread on the message pane. When it rendered this morning, it ran on 4 threads
(a seperate gadget showed all four cores running this time). The render was also
a few seconds slower. (259 vs 254). Just so all information is there, I am
running 64 bit versions of Windows 7 and POVRay.

Off topic... POVRay login screen doesn't seem to like AOL software. Had to use
IE to post this message (couldn't login).

Jay


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From: Bob
Subject: Re: WIndows 7 multi-core operation
Date: 10 Feb 2009 16:13:31
Message: <4991edfb$1@news.povray.org>
"JayWiz" <nomail@nomail> wrote in message 
news:web.497da526835cc853db9c0890@news.povray.org...
> Chris Cason <del### [at] deletethistoopovrayorg> wrote:
>> JayWiz wrote:
>> > I installed POVRay 3.7 Beta 30 on a Windows 7 Beta and the benchmark 
>> > (all cores)
>> > runs well. All other traces run with a single thread. I have checked 
>> > and the
>> > thread setting is at 4. Is this Windows or just the POVRay install...

Just FYI... I started using W7 beta (32 bit) last week on my AMD Turion 64 
X2. No apparent problems.

> It does not show number of cores found. just this:
> --------------------
> Loaded 8 tools into Tool Menu
> --------------------
> THe thread count in the message window is what I was using, but I also 
> installed
> a gadget that showed core activity. The first day I ran it, it showed 
> running on
> 1 thread on the message pane. When it rendered this morning, it ran on 4 
> threads
> (a seperate gadget showed all four cores running this time). The render 
> was also
> a few seconds slower. (259 vs 254). Just so all information is there, I am
> running 64 bit versions of Windows 7 and POVRay.

Regular and SSE2 32 bit POV shows this correctly, for me, and renders the 
benchmark in half/double the time as expected. Render menu, Thread Count... 
also shows 2 automatically.

However, the photon parse reports threads erroneously:

  Photon Time:      0 hours  0 minutes  0 seconds (0.686 seconds)
              using 4 thread(s) with 0.686 CPU-seconds total
  Radiosity Time:   No radiosity
  Trace Time:       0 hours 13 minutes 21 seconds (801.795 seconds)
              using 1 thread(s) with 799.629 CPU-seconds total

And when All CPU's used:

  Photon Time:      0 hours  0 minutes  0 seconds (0.593 seconds)
              using 5 thread(s) with 0.685 CPU-seconds total
  Radiosity Time:   No radiosity
  Trace Time:       0 hours  6 minutes 46 seconds (406.521 seconds)
              using 2 thread(s) with 804.433 CPU-seconds total

Of course, since photons hasn't been finished AFAIK that's probably not 
unusual.

Bob


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