Velocity Architecture - more than 100GB available for game assets

Discussion in 'Console Technology' started by invictis, Apr 22, 2020.

  1. Ronaldo8

    Regular Newcomer

    Joined:
    May 18, 2020
    Messages:
    284
    Likes Received:
    348
    matthias, PSman1700, Allandor and 2 others like this.
  2. thicc_gaf

    Regular Newcomer

    Joined:
    Oct 9, 2020
    Messages:
    327
    Likes Received:
    253
  3. Jay

    Jay
    Veteran Regular

    Joined:
    Aug 3, 2013
    Messages:
    3,512
    Likes Received:
    2,855
    Sampler Feedback or Sampler Feedback Streaming?

    SFS is where xbox made some customizations, although that doesn't mean GPUs doesn't have SFS also. Hard to know as not read into the DX12U support of SFS etc
     
  4. Nisaaru

    Veteran Regular

    Joined:
    Jan 19, 2013
    Messages:
    1,084
    Likes Received:
    363
    I thought it would apply some scaling/ML technique from a small resolution tile in memory than just some "coloured" tile on a miss.
     
  5. invictis

    Newcomer

    Joined:
    May 28, 2013
    Messages:
    104
    Likes Received:
    63
    So do we expect SFS to offer much of an advantage for the XSX over PS5 when it is being used?
     
  6. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,182
    Likes Received:
    16,038
    Location:
    The North
    not particularly, it would appear they attempt to solve the same challenge, just differently. PS5 by freeing possible bottlenecks from SSD to cache (cache scrubbers), and series consoles freeing as much as they can, and if they fall behind to apply an intelligent filter to replace the texture that hasn't arrived in cache yet.
     
    RagnarokFF, thicc_gaf and Allandor like this.
  7. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,182
    Likes Received:
    16,038
    Location:
    The North
    I think it depends on the distance of which this tile appears. if you're panning left right, you're just going to need a slightly wider rendering range so that the tiles are appearing as required. If they are appearing at over the long distance forward, some pixels representing that tile will suffice.
     
  8. scently

    Veteran Regular

    Joined:
    Jun 12, 2008
    Messages:
    1,088
    Likes Received:
    452
    Here is a vid tech demo of XVA with emphasis on the benefits of SFS over just using XVA:
     
    #448 scently, Apr 20, 2021
    Last edited: Apr 21, 2021
    LiveGamer, Moik, Silenti and 11 others like this.
  9. Ronaldo8

    Regular Newcomer

    Joined:
    May 18, 2020
    Messages:
    284
    Likes Received:
    348
    Of note the 2.5x multiplier is actually over the simulation of a gen 9 console using an SSD with a standard texture streaming engine like Granite using a conservative texture budget. To the surprise of none, SFS is better than software based texture streaming.
     
    rntongo, Dampf and PSman1700 like this.
  10. Jay

    Jay
    Veteran Regular

    Joined:
    Aug 3, 2013
    Messages:
    3,512
    Likes Received:
    2,855
    Not watched it properly yet but I thought I heard it mentioned that the multiplier remains pretty constant.

    Although the comparison with 1X & HDD could have been better if done with SX SSD. Or placed somewhere else as comparison of previous gen with current, but oh well.

    Edit: Was wrong, was in right place but they should have also given the figure of how long it took without SFS.
     
    #450 Jay, Apr 20, 2021
    Last edited: Apr 20, 2021
  11. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,182
    Likes Received:
    16,038
    Location:
    The North
    nice. are there more videos like this that we can just drop in here and sort them out later?
     
  12. scently

    Veteran Regular

    Joined:
    Jun 12, 2008
    Messages:
    1,088
    Likes Received:
    452
    This vid seems to capture most of the talks for today, including vids for VRS Tier 2 by The Coalition:
    Its over 4hrs and might still be live atm.
     
  13. Jay

    Jay
    Veteran Regular

    Joined:
    Aug 3, 2013
    Messages:
    3,512
    Likes Received:
    2,855
    XVA starts at 28:28 in
     
    Moik, PSman1700 and BRiT like this.
  14. Dampf

    Newcomer

    Joined:
    Nov 21, 2020
    Messages:
    78
    Likes Received:
    166
    Memory for traditional MIP streaming is basically simulating last gen (PS4/Xbox One) and every current cross gen game currently on the market, as games are not yet build with SSD streaming in mind and still have to run on the older consoles. This is true even for current PC games running on an NVMe SSD.

    Memory for XVA without SFS is basically simulating a next gen title programmed with DirectStorage NVMe SSD streaming in mind, but without an DirectX12 Ultimate capable GPU like RDNA1, Pascal or GCN.

    Memory for XVA with SFS is simulating a next gen title using DirectStorage as well as Sampler Feedback, meaning a system equipped with an NVMe drive and a DX12U capable GPU (Turing, Ampere, RDNA2).

    Hope that clears it up.
     
  15. Jay

    Jay
    Veteran Regular

    Joined:
    Aug 3, 2013
    Messages:
    3,512
    Likes Received:
    2,855
    Looks like you probably wrote this as I did an edit.

    I was specifically talking about the load time, the memory is included for all 3 different implementations (the bars at the top). But missed out the load time for non SFS, which would highlight how much benefit SFS gives beyond SSD, hardware decompression, new IO stack. Wasn't a big deal as I said, but would've been a nice data point.
     
  16. invictis

    Newcomer

    Joined:
    May 28, 2013
    Messages:
    104
    Likes Received:
    63
    SFS is really a game changer. It should help the Series S punch above its weight for instance.
     
  17. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,182
    Likes Received:
    16,038
    Location:
    The North
    At the very least relieve developers of their challenges around fitting their game around the memory constraints
     
    mr magoo likes this.
  18. Jay

    Jay
    Veteran Regular

    Joined:
    Aug 3, 2013
    Messages:
    3,512
    Likes Received:
    2,855
    Wonder if the first use will be flight sim?
    That's current gen only I believe.

    XSS would really benefit, and the speed improvement would be nice benefit for XSX.

    Be nice to get more details on bcpac also, unless I missed when details of that was released.
     
  19. Silent_Buddha

    Legend

    Joined:
    Mar 13, 2007
    Messages:
    17,786
    Likes Received:
    7,836
    That's really impressive seeing it in action. Impressive that it has no need to load the entire mip level if not needed.

    Basically it'll allow titles that use it to effectively present an image that would require significantly more memory if SFS weren't used (IE - all current games on the market).

    I wonder what game will be the first to ship with the SFS? I wonder how easy/hard it is for the developer to implement.

    Regards,
    SB
     
  20. Allandor

    Regular Newcomer

    Joined:
    Oct 6, 2013
    Messages:
    614
    Likes Received:
    549
    Well, it really get's time that MS presents something running and not just some kind of tech-demos.
    Not even the RT patch is out for Minecraft. Microsoft is really slow on adapting new features these days.
     
    egoless and goonergaz like this.
Loading...

Share This Page

  • About Us

    Beyond3D has been around for over a decade and prides itself on being the best place on the web for in-depth, technically-driven discussion and analysis of 3D graphics hardware. If you love pixels and transistors, you've come to the right place!

    Beyond3D is proudly published by GPU Tools Ltd.
Loading...