Rendering does not use 100% CPU

[robal]

Hi,

It may be an odd question (and maybe better suited to Sunflow's forum), but:

Does anyone experience low CPU usage during rendering ?
When I render, my CPU utilisation is at around 60% (javaw.exe process)
I thought it should be almost 100%, since Sunflow creates a thread for each core.

I've tested this on two machines:
- Core I7 860 (4 cores, 8 threads)
- Phenom II 950 (4 cores, 4 threads)

I'm wondering whether it's something funny about my machines (or my SH3D scene).

Anyone ?

[Puybaret]

What Java version do you use?
Could you try with the installer version and not the Java Web Start version, to see if it behaves the same?

[robal]

Hi Emmanuel,

I've noticed it first with Beta 4.0 and JRE7, but before making this post I've downloaded standalone 3.7, and it happens there too.

Cheers

[Puybaret]

Would you have any tool that would prevent a program to use all the CPU power?

[robal]

Hi Emmanuel,

I haven't used SH3D for some time recently.

Now I've downloaded version 4.1 and voila ! The issue is gone.
It now uses 100% of CPU to render on my machine and renders almost twice as fast.

Cheers,