CPU’s and GPU’s what is doing what at what stage…?

[Sonic 67]

You can use GPU-Z utility to monitor the GPU usage in real time.

[Nick Mcmahon]

[Sorin Nicu] “You can use GPU-Z utility to monitor the GPU usage in real time.”

Excellent… CPU-Z also..? so side by side you can then perform any Vegas task and see exactly what is working.

This of course will produce data and I assume that can be diagnosed by someone with the right skills) to work out how improvements can be made…?

Nick… BASE1268

3…2…1…C ya

[Sonic 67]

Well, CPUZ doesn’t show utilization.
I use for that Windows’ “Resource Monitor” – it shows CPU, memory, HDD utilization and combined with GPU-Z can pinpoint to the system bottleneck. Type in the Search field: Resource Monitor

[Nick Mcmahon]

Thanks… I’ll test that combination of resources… then I envisage the interpretation of data involves a whole new skillset

Nick… BASE1268

3…2…1…C ya

[Norman Black]

Vegas uses the GPU for video effects, transitions and compositing/blending of multiple tracks.

All else, including decode, should be done by CPU.

The preview mode Quarter, Half, Full determines at what dimensions the video stream is rendered at. Full being full project size. Half being half size. Half size is 1/4 the pixels to be processed per frame. A big savings in compute.

The preview mode for draft, preview, good, best basically turns off certain features. Many of these features may not be applicable to your source media or project settings.

Here is a link with info on this.
https://www.sonycreativesoftware.com/Forums/ShowMessage.asp?Forum=4&MessageID=95129

[Dave Osbun]

Why the fascination with GPU talk? Are you having timeline playback issues with your system? Unless you are editing 4k any well-configured Intel i7 system should play back fine.

Every single post is asking about GPU. Let’s move on….

[Nick Mcmahon]

[Dave Osbun] “Every single post is asking about GPU. Let’s move on….”

Let’s move on…?????… is there a schedule we’re following I wasn’t aware of…?… and just to clarify every recent post by me over the past few days is asking a different question in relation to graphics processing and how SVP utilises it… let’s be precise.

Every question I’ve asked here has had a wealth of experience based information come in the form of constructive answers and I am thoroughly appreciating those people who take the time to reply. Answers to questions inevitably bring more questions because answers are generally not finite, especially when there are so many variables involved.

Unfortunately… your reply in this instance gives the impression you aren’t interested in this subject… but that is not a problem because others are happy to share their knowledge.

If any given subject doesn’t float your boat and you don’t have anything constructive to say on the topic, it’s really simple to avoid saying anything and ‘move yourself on’ to choose something that appeals to you to pass on your thoughts as constructively as possible. That’s what open forums are all about… you can choose what subject you want to discuss (within the realms of relativity obviously)… or not as the case may be. If you don’t like what I ask then avoid that question… I promise you I won’t lose any sleep whatsoever or think any less of you.

Have a great day.

Nick… BASE1268

3…2…1…C ya

[Stephen Mann]

Nothing is GPU only. The GPU is great at throwing massive processing capacity at compositing, shading, and other things video related. But if you ask the GPU to add 1+1 it’s hopelessly lost. Also, the GPU has no connection with the system resources such as RAM and hard-disk except what the CPU told it to use.

Steve Mann
MannMade Digital Video
http://www.mmdv.com

[Norman Black]

[Stephen Mann] “But if you ask the GPU to add 1+1 it’s hopelessly lost.”

Huh? Math is what GPUs do.

[Stephen Mann] “Also, the GPU has no connection with the system resources such as RAM and hard-disk except what the CPU told it to use.”

Actually anything on the bus has full access to system ram. One can certainly read/write the HD via GPU but this makes no sense. The CPU is best suited to that task. GPUs are actually slow. The only way they beat a CPU is with seriously parallel algorithms. Photo/video image manipulation (effects etc) have many opportunities for seriously parallel algorithms.

[Stephen Mann]

There’s nothing in the GPU API that tells it how to do simple computing, like 1+1. But point it to the data for a series of frames and ask it to compress them into a GOP, then it’s right at home. Theoretically faster than the complex CPU.

To the OP – GPU support is an assist. If you have a dual or quad Xeon system, using the GPU actually slows you down because it takes longer for the CPU to tell the GPU what to do than to just do it without the GPU.

In my experience and for the media I work with (HDV), I don’t see any significant improvement with GPU support. I do some editing with 4K from my GoPro Hero4, but those projects are so small that any GPU performance increase is negligible.

Steve Mann
MannMade Digital Video
http://www.mmdv.com