Graphics Card utilization 2.5.1

[SonofEil]

My video card memory has been capped.

I've had a noticeable performance loss since moving from 2.5 to 2.5.1.

While flying in the trees I get stutters and lags that I never had with the previous versions. I also have microstutters while taxiing.

I ended up tracking it down to capped memory usage on my 1080 ti.

There are 11GB available from the card but since updating to 2.5.1 my card maxes out at 4.5GB memory usage. My drivers are up to date. Attached are screenshots of my settings and card performance while flying low level in the mountains behind Batumi.

I've performed tests in other graphics-intensive games/apps and usage is normal and not capped at 4.5GB, only in DCS is this new issue apparent.

Though it shouldn't be, could this issue be related to the new memory management system? Anyone have any ideas or suggestions about what's going on, how to test it, whether this is a know issue? I haven't found anything in a forum/reddit/google search.

Edited May 3, 2018 by SonofEil

[Aluminum Donkey]

Interesting... I've noticed that as well, GTX 1070 here...

 

DCS 2.2 used to eat up all 8GB of my VRAM, and almost all of my 16GB system RAM as well. When flying 2.5.1, I notice that it typically uses half of my VRAM and half my system RAM as well.

 

Which, of course, really really sucks, because DCS 2.5.1 STILL uses an enormous paging file (20GB!) and crashes without it--strange, since the sim now uses so little memory compared to what it used to, so no paging file should be needed at all!

 

Oh well, at least it runs reasonably stutter-free now, and overall performance has been mercifully good.

 

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[SonofEil]

Oh well, at least it runs reasonably stutter-free now, and overall performance has been mercifully good.

 

AD

 

That’s the problem though. I used to run stutter free, now in 2.5.1 low level flight is nearly impossible. Not to mention the fact that my graphics card, which was purchased specifically to handle DCS, has been effectively crippled by two-thirds, something I don’t appreciate. I’d like to hear from someone in-the-know about what’s going on here.

Edited May 3, 2018 by SonofEil

[Aluminum Donkey]

That’s the problem though. I used to run stutter free, now in 2.5.1 low level flight is nearly impossible. Not to mention the fact that my graphics card, which was purchased specifically to handle DCS, has been effectively crippled by two-thirds, something I don’t appreciate. I’d like to hear from someone in-the-know about what’s going on here.

 

Wow, that's weird... Your computer is really hefty compared to mine, and I've been getting great framerates with 2.5.1, and very few stutters compared to 2.2 and early renditions of 2.5, which were always absolutely AWFUL for me.

 

The only people who are really 'in the know' are the good folks at ED, and they probably all own PCs that are more like yours than mine! :)

 

Just curious, are you running DCS from a mechanical hard drive, or SSD, and if it's an SSD, is it an M.2 NVMe drive, or regular SATA SSD? I just ask because this sim (like any other flight sim) is heavily dependent on drive activity while flying, and if you're getting stutters, it might be because of the classic I/O stall phenomenon.

 

I'm not sure what to suggest, other than having a huge pagefile (20GB or more) on a SATA SSD, and maybe try installing an NVMe drive exclusively for DCS World, if you haven't already done so.

 

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[SonofEil]

Just curious, are you running DCS from a mechanical hard drive, or SSD, and if it's an SSD, is it an M.2 NVMe drive, or regular SATA SSD? I just ask because this sim (like any other flight sim) is heavily dependent on drive activity while flying, and if you're getting stutters, it might be because of the classic I/O stall phenomenon.

 

I'm not sure what to suggest, other than having a huge pagefile (20GB or more) on a SATA SSD, and maybe try installing an NVMe drive exclusively for DCS World, if you haven't already done so.

 

Thanks for the reply’s.

My drives are all solid state, Windows on a M.2 and DCS on SATA. I built my machine specifically for DCS 2.X and it was running great up until 2.5.1. Prior to the .1 update my graphics card would utilize 75-100% of the available memory, depending on scenario, with lower power consumption and GPU clock. Since the latest update my GC memory is capped at 4.5gb and the power and clock are maxed out trying to make that work. And this is with zero assets on the map, just me in a F-5 flying around the trees in daytime. Oh, and I’m only using an old 1080p monitor, no 2 or 3 or 4K glass.