DCS Running very laggy after fresh install

[taffy001]

HI All,   A bit of an update to my previous question on the 17th of June - below is my original problem/question.  I also put this on the installation problem pages, so apologies if you see it twice but desperate for help

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• Hi Guys,  need a bit of advice.
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Old drive was getting full so could not add latest update.  So just moved my DCS install to another drive (2TB SSD), used copy / paste as advised.  Also moved the Saved games folder through windows process. And changed the shortcuts.

All worked and can access DCS (takes a fair bit of time to load though).  However is very laggy in VR and on triple screens (was not like this before).  Went back and ran it from the original folder and works well as always.  So checked again but still laggy on the moved install.

Any suggestions or ideas on what this may be ??

Thanks Taffy

 

So finally gave up on this after numerous trial and error checks / repair Slow and fast etc.  So bit the bullet and did a re-install from scratch.  So just installed the basic DCS World and downloaded the F/A 18 (nothing else and planned to go through a download by download process (all on a brand new 2TB external SSD).

However just launched with the F/A 18 out of the Caucases ? .. and exactly the same fault as before.  Laggy as hell just on triple screens (not even tried VR yet).  So I seem to be back at square one with just the basic install and one aircraft.  Had a look at the log file and quite a few errors and warnings.  I am not capable of working out the protential problems, but have attached the log file if anyone can have a look and see what they think.

Any help would be great as it's driving me insane (current system is Win 10, Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz   3.70 GHz, 32 GB Ram and a GTX 3080 graphics card)   All of which work great with MSFS 2020 and iRacing)

Thanks in advance.

dcs - Copy.log

[scommander2]

A quick question: the CPU has 10 cores, is it right?

Another question, what was the memory usage while running DCS since there is 32G memory?  Have tried to increase the size of the paging size?

Edited yesterday at 04:08 AM by scommander2

[taffy001]

Good Questions,  I'll have have a look at tis - not sure exactly how but will investigate

Thanks

[taffy001]

Thanks scommander2 - did some checking and this is what I found:

my CPU has 5 cores

Paging size is running at 4864 accross all drives - is that enough etc ??

Memory use - maybe this is interesting - just taxing the F/A 18  as follows

CPU percentage at 66% - 76%

Memory at 7640MB (50%)

GPU useage 60%

Power useage at High to Very Hign (in the RED)

All that seems high to me for just 1 x aircraft taxing at Medium details - but I'm not aware of how this compares

Your thoughts

 

[Smashy]

Based on your comment on how the problem follows the new drive, I suspect the problem is caused by the new drive being much slower than the original drive.  You said the new drive is external so that's another strike against it.

Try running a disk benchmark against both drives to verify performance.

[scommander2]

A good catch the "external" drive...

Try CrystalDiskMark for the disk benchmark...

 

EDIT: I checked the Intel website for i9-10900K, and it reports 10 cores/20 threads, not sure Windows reported correctly...  I am wondering the cores got disabled by Windows according to the following doc:

Why Does my System Have Fewer or Missing Cores?

Edited 23 hours ago by scommander2

[jef32]

Hi

I recently change my computer and I have a I7 core ultra 7 265K now with a 5080 Gigabytes. And at the beginning, I was very disapointed by the poor performances of DCS  (more bad than with my old computer) and these lags you're talking about. 

Now I have around 90fps in VR ( MQ3) with 1.4 pixels without reprojection and around 60-70fps above Berlin at low altitude, in DLSS mode set on quality and without these lags with cursors on the right. But for that, I was forced to use an affinity mask in the DCS launch command and using just physical cores ( 0,1,6,7,8,9,18,19 for my CPU).

So try the good combination using this link:

https://bitsum.com/tools/cpu-affinity-calculator/

and install "process lasso" just to know which cores are physicals (see the  bargraph in process lasso at the right top and choose only the cores marked with a little sign to calculate the affinity mask) then create the launch command as this one:
"G:\DCS World\bin-mt\DCS.exe" --affinity=XXXXXX ( with XXXXXX given by the cpu-affinity-calculator site).

For me, since that, DCS is a real pleasure waiting that ED decides to fix this issue forcing players to use an affinity mask to use DCS without lags.

Edited 2 hours ago by jef32

[taffy001]

Thanks Guys,

I will take a look at all your suggestions and see how I get on.

I might try re-installing the basic DCS on the original internal drive (I have plenty of room without all the add-on mods etc) as it was working perfectly well then.  It's only since I made the change to the new external SSD that I have had the problems - that might highlight (or not) a problem with the new external drive.

Thanks again, much appreciate the info - I'll keep you informed

 

[rob10]

It's not a "problem with the external drive" per se, it's the fact that it IS an external drive which is almost always going to mean it is (much) slow transferring data to your motherboard.

[taffy001]

Hi Guys, I think you might have solved it !!!

Well had  a few spare minutes this morning and downloaded the Crystal Mark disk benchmark program and did a few test - so here they are:

Drive D - 1TB internal SSD (DCS previously installed on here) 3 or 4 tests (I don't know why they drop throughout the tests)

Read   562 / 534 / 385 / 37         Write  531 / 517 / 354 / 121

Drive H - 2TB external SSD (MSFS2020 installed on here)

Read  468 / 453 218 / 35       Write  448 / 430 / 187 / 35

Drive F - Brand new 2TB SSD - (this is where I am trying to install DCS and having issues)

Read    72 / 59 / 1.33 / 0.41     Write   77 / 69 / 0.83 / 0.58

Looks like this SSD is not working correctly as just way below the other drive speeds.  Just to confirm with you if this looks like the problem - I will take it back and get a new one to try

Your thoughts please 

Thanks

[scommander2]

Drive F definitely is too slow to load the big data for sure.

[Smashy]

Good to hear. 

You might try experimenting with different USB ports before exchanging the drive.  Also see if there are any firmware updates available from the manufacturer.  I had an SSD that was performing terribly until I saw that an update had been released to address that specific problem.

[taffy001]

Ok will check that out first

Regards

[MAXsenna]

10 hours ago, taffy001 said:

I might try re-installing the basic DCS on the original internal drive (I have plenty of room without all the add-on mods etc) as it was working perfectly well then. 

No need. Just copy the whole folder from the other drive, copy/edit all relevant shortcuts and perform a repair. Will save you some time.

Cheers!