I'm running 3.7RC3 under XP32-SP3 on an i7 CPU. I just rendered an image (actually I
just finished a continued render 
from last week) and noticed the following:

Render Time:
   Photon Time:      0 hours 16 minutes 54 seconds (1014.000 seconds)
               using 11 thread(s) with 3628.419 CPU-seconds total
   Radiosity Time:   No radiosity
   Trace Time:       1 hours  4 minutes 42 seconds (3882.079 seconds)
               using 8 thread(s) with 28627.340 CPU-seconds total

The 8 threads is correct, but 11 threads? Is POV fraying my CPU?

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Tim Riley <timothyrileyatnetscapedotnet> wrote:
> Is POV fraying my CPU?

  What does that mean?

-- 
                                                          - Warp

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On Mon, 14 Feb 2011 13:15:23 -0500, Warp wrote:

> Tim Riley <timothyrileyatnetscapedotnet> wrote:
>> Is POV fraying my CPU?
> 
>   What does that mean?

It's a pun.

Threads (in fabrics) and fraying (again, in fabrics).

Jim

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On 14-Feb-11 12:00, Jim Henderson wrote:
> On Mon, 14 Feb 2011 13:15:23 -0500, Warp wrote:
>
>> Tim Riley<timothyrileyatnetscapedotnet>  wrote:
>>> Is POV fraying my CPU?
>>
>>    What does that mean?
>
> It's a pun.
>
> Threads (in fabrics) and fraying (again, in fabrics).
>
> Jim

Sorry. Hard to stay away from puns even when I know they don't translate well (or at
all).

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On Mon, 14 Feb 2011 12:16:24 -0700, Tim Riley wrote:

> On 14-Feb-11 12:00, Jim Henderson wrote:
>> On Mon, 14 Feb 2011 13:15:23 -0500, Warp wrote:
>>
>>> Tim Riley<timothyrileyatnetscapedotnet>  wrote:
>>>> Is POV fraying my CPU?
>>>
>>>    What does that mean?
>>
>> It's a pun.
>>
>> Threads (in fabrics) and fraying (again, in fabrics).
>>
>> Jim
> 
> Sorry. Hard to stay away from puns even when I know they don't translate
> well (or at all).

I thought it was a good one, and that's saying something, because "good 
pun" is an oxymoron. ;-)

Jim

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> I'm running 3.7RC3 under XP32-SP3 on an i7 CPU. I just rendered an image
> (actually I just finished a continued render from last week) and noticed
> the following:
>
> Render Time:
> Photon Time: 0 hours 16 minutes 54 seconds (1014.000 seconds)
> using 11 thread(s) with 3628.419 CPU-seconds total
> Radiosity Time: No radiosity
> Trace Time: 1 hours 4 minutes 42 seconds (3882.079 seconds)
> using 8 thread(s) with 28627.340 CPU-seconds total
>
> The 8 threads is correct, but 11 threads? Is POV fraying my CPU?

How many actual cores?
Using hyperthreading?

For 8 cores, hyperthreading offer 16 virtual cores: 2 virtual cores per 
actual core.



Alain

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On 14-Feb-11 14:45, Alain wrote:
> Le 2011/02/14 12:36, Tim Riley a écrit :
>> I'm running 3.7RC3 under XP32-SP3 on an i7 CPU. I just rendered an image
>> (actually I just finished a continued render from last week) and noticed
>> the following:
>>
>> Render Time:
>> Photon Time: 0 hours 16 minutes 54 seconds (1014.000 seconds)
>> using 11 thread(s) with 3628.419 CPU-seconds total
>> Radiosity Time: No radiosity
>> Trace Time: 1 hours 4 minutes 42 seconds (3882.079 seconds)
>> using 8 thread(s) with 28627.340 CPU-seconds total
>>
>> The 8 threads is correct, but 11 threads? Is POV fraying my CPU?
>
> How many actual cores?
> Using hyperthreading?
>
> For 8 cores, hyperthreading offer 16 virtual cores: 2 virtual cores per actual core.
>
>
>
> Alain

Good question. According to the Intel website:

"This quad-core processor features 8-way multitasking capability..."
and
"Intel® HT Technology◊ allows each core of your processor to work on two tasks at
the same time."

which I interpret to mean there are four hyperthreaded actual cores, for a total of
eight virtual cores. Process 
Explorer shows eight "CPUs"; I think it refers to individual virtual cores.

I've never seen POV list more than eight threads on this machine, but I don't
religiously check the stats unless I sense 
something strange happening; and I don't normally stop in mid-render and continue
later. So I can't say it never 
happened before, or whether pausing the render is involved.

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Le 14/02/2011 18:36, Tim Riley nous fit lire :
> I'm running 3.7RC3 under XP32-SP3 on an i7 CPU. I just rendered an image
> (actually I just finished a continued render from last week) and noticed
> the following:
> 
> Render Time:
>   Photon Time:      0 hours 16 minutes 54 seconds (1014.000 seconds)
>               using 11 thread(s) with 3628.419 CPU-seconds total
>   Radiosity Time:   No radiosity
>   Trace Time:       1 hours  4 minutes 42 seconds (3882.079 seconds)
>               using 8 thread(s) with 28627.340 CPU-seconds total
> 
> The 8 threads is correct, but 11 threads? Is POV fraying my CPU?

11 for photon time...

Testing with --benchmark, it seems photon get a +3 bonus everytime.


Render Time:
  Photon Time:      0 hours  0 minutes  2 seconds (2.448 seconds)
              using 15 thread(s) with 2.840 CPU-seconds total
  Radiosity Time:   No radiosity
  Trace Time:       0 hours  2 minutes 40 seconds (160.229 seconds)
              using 12 thread(s) with 1881.057 CPU-seconds total


Render Time:
  Photon Time:      0 hours  0 minutes  2 seconds (2.496 seconds)
              using 7 thread(s) with 2.892 CPU-seconds total
  Radiosity Time:   No radiosity
  Trace Time:       0 hours  5 minutes 21 seconds (321.634 seconds)
              using 4 thread(s) with 1281.622 CPU-seconds total

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Tim Riley wrote:
> Process Explorer shows eight "CPUs"; I 
> think it refers to individual virtual cores.

Yes, but Windows knows they're virtual, so it schedules appropriately.

-- 
Darren New, San Diego CA, USA (PST)
  "How did he die?"   "He got shot in the hand."
     "That was fatal?"
          "He was holding a live grenade at the time."

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