Render & CPU

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Old 10 October 2012   #1
Render & CPU

When I render, when I am waiting to begin the rendering process I see in windows task manager 3ds Max use only 13% CPU, why do not use 99% like until rendering?
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Old 10 October 2012   #2
There are lots of things that can influence this.

Many parts of a program don't break down well into independent threads, so most of most programs are written straightforward as a single thread. If you have 8 cores and the program is running 1 thread then the most you'll get is 12.5% ... 13%.

Much of what a program does is sit around and wait for other things to happen: say a user to press a key or a piece of data to come back from disk. If your program is doing this sort of thing then it will have a very hard time keeping the use rate up.
 
Old 10 October 2012   #3
Originally Posted by gruhn: There are lots of things that can influence this.

Many parts of a program don't break down well into independent threads, so most of most programs are written straightforward as a single thread. If you have 8 cores and the program is running 1 thread then the most you'll get is 12.5% ... 13%.

Much of what a program does is sit around and wait for other things to happen: say a user to press a key or a piece of data to come back from disk. If your program is doing this sort of thing then it will have a very hard time keeping the use rate up.


I use Max 2012 x64, windows 7 64, i7-2600k

What is the solution?
when the render is working max use the cpu 99%
I talk about the pre-render process, max use the cpu only 13% as you said maybe only 1 core...
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Old 10 October 2012   #4
Some parts of Max aren't multithreaded. In some cases it's because they haven't designed it to be multithreaded but in others they have chosen not to because it actually goes slower that way.

There's nothing you can do either way.
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Old 10 October 2012   #5
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