SPU LLVM: experimental change

[Nekotekina]

Please test.

[Ordinary205]

RPCS3 crashes when building a SPU cache on this PR Build.
RPCS3.log.gz

[Nekotekina]

Can I get more results from different games?

[Ordinary205]

It crashes on every games that I've tested, including Demon's Souls.

Edit: Oh wait, it doesn't crash on the game called "The Wolf Among Us"
RPCS3.log.gz

[Darkhost1999]

Assassin's Creed [NPUB30451].log
Works really well with first time building a cache but closes RPCS3 when loading an existing cache.

[Ordinary205]

So basically the results are:

Midnight Club: LA
Crashes
RPCS3.log.gz

Demon's Souls
Crashes
RPCS3.log.gz

The Wolf Among Us
Doesn't crash
RPCS3.log.gz

God of War III
Crashes
RPCS3.log.gz

God of War: Asension
Crashes
RPCS3.log.gz

Need for Speed: The Run
Crashes
RPCS3.log.gz

Battlefield 3
Crashes
RPCS3.log.gz

InFamous
Doesnt crash
RPCS3.log.gz

Red Dead Redemption
Crashes
RPCS3.log.gz

[Nekotekina]

I see, please retest

[Ordinary205]

Sorry if this is a dumb question, but are you creating this PR just to improve the stability or the performance?

[Darkhost1999]

RPCS3.log.gz
I'm not noticing any issues now

[Nekotekina]

@Ordinary205 basically performance

[Darkhost1999]

This change positively effects Netflix's first boot with a brand new SPU cache. Bringing the ability to get to the login to your profile screen considerably faster than ever before. 😁

[Yahfz]

Master SPU Test v1.1.2 by GalCiv SPU Task Avalanche completed in 5269 ms (PS3: 2740 ms) PPU/SPU Ping-Pong completed in 3441 ms (PS3: 3045 ms) SPU MFC 64 Bits War completed in 15490 ms (PS3: 3370 ms) PPU/SPU MFC 64 Bits War completed in 17235 ms (PS3: 4443 ms) SPU Integer Perf completed in 17155 ms (PS3: 8666 ms) SPU Float Perf completed in 5841 ms (PS3: 2379 ms) SPU SpinLock completed in 9038 ms (PS3: 4409 ms) PUTLLUC Perf completed in 7240 ms (PS3: 3853 ms) PUTLLC Perf completed in 9469 ms (PS3: 3364 ms) PUT Perf completed in 5986 ms (PS3: 3984 ms) Large PUT Perf completed in 11345 ms (PS3: 4454 ms) --Completed 11 tests in 107518 ms--

64Bd70c SPU Test v1.1.2 by GalCiv SPU Task Avalanche completed in 5445 ms (PS3: 2740 ms) PPU/SPU Ping-Pong completed in 3374 ms (PS3: 3045 ms) SPU MFC 64 Bits War completed in 15442 ms (PS3: 3370 ms) PPU/SPU MFC 64 Bits War completed in 18003 ms (PS3: 4443 ms) SPU Integer Perf completed in 2493 ms (PS3: 8666 ms) SPU Float Perf completed in 720 ms (PS3: 2379 ms) SPU SpinLock completed in 8985 ms (PS3: 4409 ms) PUTLLUC Perf completed in 6596 ms (PS3: 3853 ms) PUTLLC Perf completed in 6995 ms (PS3: 3364 ms) PUT Perf completed in 4320 ms (PS3: 3984 ms) Large PUT Perf completed in 11586 ms (PS3: 4454 ms) --Completed 11 tests in 83967 ms--

SPU Integer Perf, SPU Float Perf & PUT Perf look better to me

I mean, if this PR improved your float performance this much over master then we can pack it up cause RPCS3 is done. That much of an increase is almost like going from a core 2 duo to a ryzen 3700X, those results aren't correct.

[Darkhost1999]

I copied and pasted. But I'll run the test a couple of times on master more than just 1st boot and replace the master test results

[Darkhost1999]

Numbers are much closer together but still overall improvement unless the numbers are supposed to keep going down every time you run the test

Master
TTY.log
64bd70c
TTY.log

[Nekotekina]

I think it's just a LLVM16 PR regression that is fixed.

[solarmystic]

Back again with the usual 5 game (P5, DeS, TLOU, GOWA, GOW3) round up.

All 5 games booted and ran fine. Performance is within margin of error for all games tested compared to master so I felt that individual break downs were unnecessary.

Captured SS with results for those who're interested:-
891 vs SPU Exp.zip

[Ordinary205]

@solarmystic does that count as a performance regression when god of war III has lower 1% FPS than master?
Because I'm pretty sure it does.

[solarmystic]

Retested again with latest pr commit (9e75cb9) versus latest master (14896).

GOW 3 - Minor gain on average FPS, minor reduction in 1% FPS.
Master - 128/95/69 FPS
This PR (9e75cb9) - 130/91/69 FPS

GOWA - Within margin of error for average FPS, minor gain in 1% and 0.1% FPS.
Master - 65/58/53 FPS
This PR (9e75cb9) - 66/61/56 FPS

The Last of Us - Identical average FPS, minor gain in 0.1% FPS
Master - 51/46/42 FPS
This PR (9e75cb9) - 51/47/45 FPS

Persona 5 - Within margin of error for all metrics.
Master - 89/64/57 FPS
This PR (9e75cb9) - 89/62/57 FPS

Demon's Souls - Within margin of error on average, slight reduction in 1% FPS.
Master - 105/89/82 FPS
This PR (9e75cb9) - 106/87/82 FPS

SS with all results:-
896 vs SPU Exp 2.zip