Performance hit when a large number of bombs are dropped on AMD

[Spectre VCAW-1]

I apologize if this is the wrong forum.

I created a simple mission in PG. All it contains are 2 groups of 4 B1B's each with 84 MK82s. I have the 2 groups flying fairly close together and carpet bombing all 672 bombs in close proximity. There are no client aircraft, so I am watching in spectator. When the bombing commences, I go from around 300fps to 5fps. This is while the bombs are still falling. It does not matter if I am watching the bombs themselves, for the F10 map for a single unit I placed next to the target location. This low frame rate continues until the bombs all explode then the framerate goes back to 300fps.

Note, even with just one group and 336 bombs it is the same.

My system specs are decent. AMD 5950x, RTX4090 with 64GB DDR4. DCS is running off an SSD and changing the graphics settings has little impact, I did not really expect it to, since when I am looking at the map there is not a lot to render.

Any ideas?

I have seen videos of carpet bombing that looked perfectly smooth.

**Edit** - MT vs ST is not any different, although most of my testing has been in MT.

**Edit** - I have observed that the frame rate drop immediately when the first group drops, and will not go back up until the second group's last bomb explodes. I have had a friend run this same mission on his Intel based machine and he does not experience the same drop in frame rate until the bombs hit the ground.

Here is a video I took from just before the drop to just after they all hit.

Here is a video a friend made with an Intel i7 9700k 3080Ti 64GB ram.

Note the difference in how his frame rate is not hit nearly as hard. I suspect this issue is somehow related to AMD processors.

 

 

Carpet.trk Carpet1.miz

Edited December 4, 2023 by Spectre VCAW-1
Attached miz and track files

[silverdevil]

2 minutes ago, Spectre VCAW-1 said:

I apologize if this is the wrong forum.

I created a simple mission in PG. All it contains are 2 groups of 4 B1B's each with 84 MK82s. I have the 2 groups flying fairly close together and carpet bombing all 672 bombs in close proximity. There are no client aircraft, so I am watching in spectator. When the bombing commences, I go from around 300fps to 5fps. This is while the bombs are still falling. It does not matter if I am watching the bombs themselves, for the F10 map for a single unit I placed next to the target location. This low frame rate continues until the bombs all explode then the framerate goes back to 300fps.

Note, even with just one group and 336 bombs it is the same.

My system specs are decent. AMD 5950x, RTX4090 with 64GB DDR4. DCS is running off an SSD and changing the graphics settings has little impact, I did not really expect it to, since when I am looking at the map there is not a lot to render.

Any ideas?

I have seen videos of carpet bombing that looked perfectly smooth.

**Edit** - MT vs ST is not any different, although most of my testing has been in MT.

 

hello. try to grab a track so others can view it to see what their performance is like. i think watching in spectator will be less FPS (from my experience). i usually watch from the seat of another plane. i feel the degradation of performance seems less. 672 bombs going of is pretty taxing. i have a mission for A10 called "ISIS_CRISIS_Mission" i downloaded. part of the mission is b52 strike of mk20s. its some show.

[KoN]

ARE you using 2.9 MT . exe 

[Spectre VCAW-1]

Yes, latest open beta build in MT, I have run it in ST too, same effect

[Glide]

Nice performance test.  Cut it down to two planes, then one, then a half load, then a quarter load, and report back.  If at some point the performance returns to normal, then it's a matter of too many objects.  However, if the performance stays bad it's something else.  Does the type of payload matter?

[Spectre VCAW-1]

If it was, then why the big difference between the AMD and the Intel? Or is AMD just garbage?

[The_Nephilim]

13 minutes ago, Spectre VCAW-1 said:

If it was, then why the big difference between the AMD and the Intel? Or is AMD just garbage?

it is not that AMD is garbage they just dont have the instruction set that intel has. I seen a video on talking about this and why intel is still a bit better but AMD is certainly catching up..

[Spectre VCAW-1]

I have made some changes to the mission, when I drop one of the flight and reduce the drop to half at once, so 168 bombs, the frames fluctuate between 8 and 43. If I change it to 3 ships dropping half so 126 bombs at once then it just starts affecting framerate. That said I pretty much expected that it is object count, but what I want to know is why does an Intel based processor not take as big a hit when compared to an AMD. I have some other friends testing it on their machines to see the effect. One of them with another Intel Experienced a drop to 41FPS while the bombs were falling.

 

Note this test is less to do with this specifically with the number of bombs, it is to point out that AMD processors perform poorly running DCS. There is something not right, I cannot tell if it is code related or if it is just that AMD processors are inferior, though I have not experienced this in other games.

Edited December 4, 2023 by Spectre VCAW-1

[Spectre VCAW-1]

I would like to indicate here that I seem to have solved this problem. I am not sure which of the things I did solved it, since I have no patience and did them all together.

I have an ASUS Crosshair Dark Hero VIII motherboard.

1. I updated the bios to the latest version which was released less than a month ago.

2. I updated all the drivers and software the motherboard came with.

3. I installed GameFirst VI, this is a Asus utility.

As you can see there is a drop in framerate just when the bombs a drop, but then goes up again, until the bombs get close to the ground, then it drops again. Note sure why, but at least it is playable.