MSAA Performance Regression

[Darkhost1999]

Making a formal report per requested

Could be affecting nvidia cards disproportionately, I'll have to check it. In the meantime open a ticket about the performance and I'll decide whether its worth investigating further.

• Build without regression #10579 RPCS3.log

• Build with regression #11607 RPCS3.log

In my honest thoughts I can continue playing with MSAA off and I would not be upset if the cause to this issue is a won't fix.

[Darkhost1999]

Status update with recent changes to RPCS3. If helpful. RPCS3.log

[kd-11]

I forgot to mention. I tested my 1050ti. No performance impact was observed. Something else is going on specifically in your setup. Lets leave the ticket up to gather more data in case more people are affected.

[Yahfz]

Lots of people have tested this and nobody had a performance hit.. Pretty sure its an user error thing.

[Megamouse]

issues with patches applied are not allowed

[Darkhost1999]

Updated logs Thanks guys

[Jonathan44062]

Yikes, this also happens to me lol CPU: i7 8700 GPU: GTX NVIDIA 1070 Ti

MSAA (Anti-Aliasing) Disable:

MSAA (Anti-Aliasing) Enable:

[MarioSonic2987]

0.0.21-13335 (Prior to #11607) - With AA:

0.0.21-13335 - Without AA:

Latest build (with AA):

Latest build (without AA):

LOG RDR 13335 No AA.gz LOG RDR 13335 AA.gz

LOG RDR No AA.gz LOG RDR AA.gz

CPU: i9-9900KF GPU: GTX 970

[kunit1]

Can confirm the performance degradation when AA is enabled.

CPU: Core i5 12600K GPU: GTX 1080

Latest Build: AA Enabled: 10 FPS Avg AA Disabled: 30 FPS

btw: I noticed when AA is enabled the GPU is pegged at 98% Utilization. When AA disabled it's around 30%.

Edit: Log file AA enabled. RPCS3.log

[JimScript]

I know this isn't RDR, but LittleBigPlanet is negatively affected by this too. With AA on I get sub 5 fps at 100% gpu utilization, wherein before I could have it on without any worry or notice. And unlike RDR, disabling AA introduces graphical issues:

Logs: RPCS3.LBP.before.gz RPCS3.LBP.after.gz

Specs:

• SYS: RPCS3 v0.0.21-13346-78b8bd80 Alpha | HEAD
• SYS: AMD Ryzen 5 3600 6-Core Processor | 12 Threads | 15.95 GiB RAM | TSC: 3.600GHz | AVX+ | FMA3
• SYS: Operating system: Windows, Major: 10, Minor: 0, Build: 19043, Service Pack: none, Compatibility mode: 0
• SYS: Current Time: 2022-03-12T11:36:44
• RSX: Found vulkan-compatible GPU: 'NVIDIA GeForce RTX 2070 SUPER' running on driver 511.23.0.0
• SYS: Firmware version: 4.88

[Xcedf]

3080 here Noticed that for me MSAA regressed a lot in RDR too, but only on non-native resolutions 13343 1x IR, AA Disabled 13343 1x IR, AA Enabled 13343 2x IR, AA Disabled 13343 2x IR, AA Enabled Rre_PR 13335 2x IR, AA Enabled, but windows flickering Logs for all cases: 13343_1x_No_AA.gz 13343_1x_AA.gz 13343_2x_No_AA.gz 13343_2x_AA.gz 13335_2x_AA.gz

[Yahfz]

Its not "only in native resolutions". It only manifests for you at higher resolutions because your GPU is faster. Your GPU is fast enough to handle MSAA at 1X IR, but it can't handle a higher resolution + MSAA.

[kd-11]

I'm working on a more radical solution. To be clear - the old way of MSAA is unacceptably bad, we cannot go back to using it. I'm trying a new approach altogether.

[Danke-Boi]

I'm working on a more radical solution. To be clear - the old way of MSAA is unacceptably bad, we cannot go back to using it. I'm trying a new approach altogether.

[kd-11]

https://github.com/RPCS3/rpcs3/pull/11665 should resolve this once and for all. It has been tested with AMD (RDNA2) and NV (Maxwell, Pascall & Ampere) GPUs. Test if anything breaks. It is a big change, its better to be careful.