Task Manager doesn’t really show an accurate representation of your GPU usage. (Or RAM, but that’s a separate matter.) If you really want to see what your GPU is doing at any given time, you want to get something else. GPU-Z is nice and lightweight. MSI Afterburner / EVGA Precision should also give you plenty of information about what’s going on in the GPU as well.
As far as video card utilization goes, I believe it’s only going to be used during feature matching and creation of the depth maps for the dense cloud. Anything outside of that will, I think, be done by the CPU. (I could be wrong, though.)
The speed of the GPU also can affect how much utilization is shown. When feature matching is happening, for instance- with my old GPU (1080ti) I’d see a spike to 100% for each frame as it was processed. My new card (3080ti) goes through the individual frames so quickly that the spike doesn’t even have time to get past 2-3%. Whole different world when doing the depth maps, though- that’s still solid blocks of 100% utilization.
As for stop / start… you probably shouldn’t be doing that. “Resume” is not exactly like starting up again after pausing. It’s going to go back to the beginning of a major section of the process, rather than picking up again right where you left off. Depending on the size of your project (and it sounds like it’s a rather large one) you might find that you’ll never be able to finish. If, for instance, the multi-view stereo section takes 28 hours to burn through entirely, and you spend 18 hours then stop it, then restart it the next day? It’s not going to just be 10 more hours. You’re going to re-start that 28-hour clock over again. And if you’re just doing 18 hours at a time, you’ll never actually finish.
I’m not sure about that, last night I had a project fail on me due to running out of memory, so I rejigged my paging file, and then hit resume processing, and it continued to the end, and reading the task output it found all the bits that it had done, checked they were ok and carried on from there
Not from the exact same spot, though, I’d be willing to bet.
If you hit the pulldown menu for the restart button, there’s several landmarks in there for major sections of the process. Every time I’ve had to restart–whether because I stopped it or crashed or whatever–it restarted from the beginning of whatever major section it was in the middle of at the time.
Yeah, I pulled that down and right at the very top was continue processing, so I picked that, it’s doing another job at the moment bite when that’s done I’ll see if I can copy the section of the task output I mentioned in my previous comment