Thanks. It's always good to get a developer with year of experience to give their opinion on a situation like this.
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Performance Analysis: Assassin's Creed Unity (Digital Foundry)
- Thread starter cb1115
- Start date
Endoplasmatisch
Banned
travisbickle
Member
Isn't the clock speed of the PS4 CPU just a guess anyway? We don't know for certain what it's clocked at?
If you are "fine with 30fps" you should be at least "ok" with 25fps and hell 20fps should be acceptable... If 30 fps is your goal and you fuck it up you end up with 20-25fps. If your goal is 60fps and you fuck it up you end up with maybe 40-45fps. And you know what a framerate of 40-45fps is perfect for? Locking the game at 30fps...
This is the reason why you should never aim for 30fps. 30fps is the acceptable fuck-up if you cannot reach your goal. And a fuck-up is not "fine".
This is from memory but based on publicly available info: A Naughty Dog employee lecture mentioned 1.6GHz and Guerilla Games profiling screenshot had 1.6GHz.
markedbravado
Member
this.
In cases where the API has the same overhead I agree the PS4 CPU is a fraction worse but there is no evidence to suggest that MS has caught up in all areas where it had worse API overhead and when drawing a scene you are not just using one part of the API.
The performance differential is just too great for it to be explained by CPU clock speed alone.
There is an excuse for cutscenes, they would drop fps like on Xbone if they changed resolution to 1080p on PS4.
FinalStageBoss
Banned
Dat cinematic 25 fps. Ubi is garage. Should've been delayed.
Who does Fafalada work for?
Dictator93
Member
I get the feeling the game should have paired back some of the NPC counts and graphical flare.
Yeah maybe me calling it "real world" is overreaching based on only the Ubisoft dancer graph. I agree with you.
Btw we have some pretty good data on GDDR5 latency in PS4 from Naughty Dogs' presentation:
Damn, images and i cant really rehost them now.
Link is here:
http://www.redgamingtech.com/ps4-architecture-naughty-dog-sinfo-analysis-technical-breakdown-part-2/
Damn, images and i cant really rehost them now.
Link is here:
http://www.redgamingtech.com/ps4-architecture-naughty-dog-sinfo-analysis-technical-breakdown-part-2/
Sodding_Gamer
Member
I'm not sure. He's been a long time member that used to give some great info on PS2 development. I'm not really sure what other systems he's worked on.
Oh ok. I don't particularly doubt what he's saying, I was just curious.
Honestly at this point it's useless to argue about how this trainwreck happened (which is obvious, the game is unfinished on all platforms, XB1 was the lead SKU they used for development, setting the bar for quality, and PS4 got an unoptimized port running at the same settings of XB1 version, with much less development time).
Right now the most important thing is having them committed to fix this shit asap with new patches.
I'm not expecting them to turn this mess into a bug free, stable 30 fps experience, but they can't leave the game in this almost unplayable state.
Right now the most important thing is having them committed to fix this shit asap with new patches.
I'm not expecting them to turn this mess into a bug free, stable 30 fps experience, but they can't leave the game in this almost unplayable state.
Correct me if I'm wrong, but I was under the impression that GPGPU didn't impact graphical output whatsoever. Something about it using the GPU during downtimes in the rendering pipeline?
On mobile, otherwise I'd do some googlefu to confirm.
FeiRR
Banned
Interesting. It also explains why CPU-bound engines are likely to perform terribly on PS4 (I don't know how close X1's architecture is) and clock speed isn't really the main concern.
I only have one thing to say...
omg man. I am not sleeping tonight.
markedbravado
Member
Crazy that Ubi haven't sent out an apology of sorts. They did with Tomb Raider exclusivity and yesterday 343 issued a statement for the MCC issues. Really hard to stomach this lack of transparency by such a big pub.
Ubisoft is notorious for god awful CPU optimization. Just look at the system reqs for any of their games on PC. They are unreasonably high.
They are such a shit company, it's not even funny. I don't really like any games they make anyway, but now I will consciously go out of my way to make sure I never do.
They are such a shit company, it's not even funny. I don't really like any games they make anyway, but now I will consciously go out of my way to make sure I never do.
Async GPGPU exists, but most of GPGPU related algorithms will not run in async. So yeah its possible to some degree, but most of the time GPGPU will take GPU time from rendering.
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But their games work fine on low spec and mid-range PCs. See Watch Dogs or AC IV analysis on DF on lower spec PCs or GPUs.
What I was asking is that would it be possible to off-load some of the CPU's task onto the not used parts of the GPU? (The game looks identical which means that PS4's GPU doesn't even break a sweat, right?
EDIT: now I understand your post. lol. We're probably asking the same thing.
Check cutscenes framerate analysis.
Hmm, so the X1 would have problems running the game at a constant 30 with these settings, even if there wouldn't be CPU problems?
They held the review embargo until the day of launch and intentionally hid the microtransaction bullshit from reviewers. It isn't crazy to expect them to act in the same way they have been all along.
I think it's actually crazy to expect them to send out an apology.
Yoshi
Headmaster of Console Warrior Jugendstrafanstalt
Maybe you are just more sensible in that regard than the PS4-players you have spoken to? If someone gave me a 720p version of a gamethat runs in 1080p on another system, I would say everything is fine, while some around here would be mad as fuck. On the other hand, I'm quite sensible to framedrops, where others I know don't think the OoT framerate is less comfortable than the Mario Kart 8 one (~20-25 compared to 60).
Pretty much and concurs with the testers telling that the PS4 patch was received very late
Alpha. What Are You trying to prove?
Alpha in this context does not mean 'alpha version'. Alpha is a 'colour' embedded in textures that represents how translucent the texture is at that point (So, 0 alpha = invisible, 255 alpha = solid colour)
It's a smoke effect, so there's heavy use of alpha to create that misty look.
What makes you say that? The whole point of the ACE units is to schedule compute tasks in and around the current rendering load. No matter what is rendering some shaders are not going to be used and that is where the ACE units put the compute tasks. The fact that ACE stands for Asynchronous Compute Engine might be a clue that the entire job of that unit is to schedule Asynchronous Compute.
dr. apocalipsis
Banned
Oh, it is like nobody on Gaf ever pointed that this could happen on open games with heavy CPU demands.
Except some people did.
It's not only about 150mhz upclock, MS cared more about soften Jaguar cores deficiencies with all those move engines crap and dedicated buses to max performance and lose less cycles.
Ok people, time to surrender your parity posts, your moneyhats accusations and your lazy devs claims.
Except some people did.
It's not only about 150mhz upclock, MS cared more about soften Jaguar cores deficiencies with all those move engines crap and dedicated buses to max performance and lose less cycles.
Ok people, time to surrender your parity posts, your moneyhats accusations and your lazy devs claims.
biglittleps
Member
I think this game was developed in PC and ported to Consoles from last year. XB1 is close to PC architecture than PS4 in memory and API so it's running better in XB1. This game was not designed around console hardware and its running reasonably in mid range PC hardware with some heavy settings turned off.
Why would the PS4 have "move engines"?
I don't think so, the PC version was developed by Ubisoft Kiev while the console versions were developed by Ubisoft Montreal, the main developers for this game.
captainraincoat
Banned
Arghh first time i have heard my ps4 fan go this loud.........something seems off
Exactly what I was thinking.
Thus, it rules out the argument that they couldn't go 1080p since the slightly slower CPU was being covered by the GPU and left little room for graphical oomph, so to speak.
I'm still not sure I buy their reasoning as to why this game didn't reach higher on the resolution if the only bottlekneck was the CPU.
thekiddfran
Member
Will wait for the collectors edtion to hit 30 euro before I buy like usual.
By then hopefully a few updates will have improved the PS4 version.
This is bullshit
By then hopefully a few updates will have improved the PS4 version.
This is bullshit
DOWN
Banned
Yes. I can't imagine what a mess this was before patches.
FranXico
Member
Why are you ignoring that the PS4 also has separated dedicated buses for the CPU and GPU?
I was thinking the same thing lol, anyway, being this a pretty CPU limited game, and being Xbox One CPU a bit faster than the PS4 one i can see it to be a few frame smoother on Xbox during the most CPU load scenarios, without screaming at Microsoft payed Ubisoft ecc...
No, ACE is for making a waverfronts generally.
And You cant do async compute when the CU unit is fully occupied, which it is in many cases, especially in heavier scenarios. Sure, there will be always some async time available, but i can vary a lot and You will never be able to push all compute to async.
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For sure in cutscenes, probably in gameplay too. Its clear that Xbone is limited by GPU in cutscenes.
FullMetaltech
Member
Guess im skipping this mess then. DA:I and GTA5 will be getting my money. Ashame too because i liked Black Flag too.
A 9% clock speed increase does not account for a near 20% FPS increase. The very best case of 100% cpu bound scenarios (Starcraft 2 is a great example of this) will see linear scaling so at best 9% is the maximum you can expect.