Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 35

Thread: An Optimized Open-Source Driver Tries To Compete With AMD Catalyst

  1. #21

    Default

    Two comments about the graphs:

    1. At some point, the order changes, Catalyst moves position to between the two mesa results, which is confusing.

    2. Why not have vertical indicators at 30, 60, 120 ... fps instead of automatically determined by the results? From my point of view 30 is ok, 60 is the maximum for most displays, and more than 120 is uninteresting in practice.

    Also, why not put the Xonotic results directly after Nexuiz if you refer to them anyway?

    Quote Originally Posted by enrico.tagliavini View Post
    I wonder if enabling S3TC might improve the performance of the radeon driver. Well this can be an idea for the next article
    It does, in applications that enable texture compression the fps are higher when libtxc-dxtn is installed.

  2. #22
    Join Date
    Dec 2008
    Location
    San Bernardino, CA
    Posts
    234

    Default

    Great article Michael!

    Its quite sad to see how little these tweaks boosted performance on the r600 (46xx and 48xx) series. Maybe, just like AMD, all the resources are being put into the newer generation cards.

  3. #23
    Join Date
    Nov 2008
    Location
    Germany
    Posts
    5,411

    Default

    Quote Originally Posted by gururise View Post
    Great article Michael!

    Its quite sad to see how little these tweaks boosted performance on the r600 (46xx and 48xx) series. Maybe, just like AMD, all the resources are being put into the newer generation cards.
    hey i do have the same problem here: http://phoronix.com/forums/showthrea...n-driver/page2

    hd4770 13fps hd6770=4xfps

    but its 6xx shaders vs 800 shaders and 750mhz vs 800mhz

    the hd6770 should not be 4 times faster maybe 1/3 faster.

  4. #24
    Join Date
    Mar 2008
    Posts
    579

    Default

    Thanks for this benchmark. The problem is that I already knew the results. The OSS driver performs bad and misses plenty of features. Catalyst driver performs good for 3D but is a piece of crap under all the other aspects.

    Under Linux you can never have 1 thing that works good for all scenarios. You have to choose between 2 or more things depending on your needs and will never be 100% satisfied because one day, soon or later, you will surely need that missing feature that only the other choice has.

  5. #25
    Join Date
    Jan 2010
    Location
    Horse country, KY
    Posts
    14

    Default

    So it's pretty much the same old story: despite all the effort spent tweaking the OSS drivers, they're still running at a tiny fraction of the speed of the closed-source binary blobs. Other than supporting older chipsets that Catalyst has put out to pasture, it's difficult to put a positive spin on this.

  6. #26
    Join Date
    Nov 2009
    Posts
    101

    Default

    I did hear that the nouveau driver performs much better in relation to the blob.

    I don't really understand why the open ati driver is still that slow after several years and with ATI itself as the major contributor.

  7. #27
    Join Date
    Jul 2010
    Posts
    449

    Default

    They needed to catch up on multiple generations - there are now three open AMD drivers - r300g, r600g and radeonsi.

    Then there's all the work they have done that wasn't been able to be released.

  8. #28
    Join Date
    Nov 2009
    Posts
    101

    Default

    Quote Originally Posted by archibald View Post
    They needed to catch up on multiple generations - there are now three open AMD drivers - r300g, r600g and radeonsi.

    Then there's all the work they have done that wasn't been able to be released.
    So? The main problem seems to me to be that there's about 3 developers, 5 managers and 25 lawyers working on this.

  9. #29
    Join Date
    Oct 2007
    Location
    Toronto-ish
    Posts
    7,578

    Default

    Quote Originally Posted by barkas View Post
    So? The main problem seems to me to be that there's about 3 developers, 5 managers and 25 lawyers working on this.
    Actually 4 developers, a fraction of a manager and no lawyers but don't let me slow you down

    IIRC the main differences between radeon and nouveau in terms of performance progress are :

    1. the NVidia hardware equivalent of two performance improving features (what we call tiling and HyperZ) are implemented in such a way that "turning them on" requires less driver work than doing the same on ATI/AMD hardware. Jerome and others been making great progress here recently.

    2. the VLIW shader core probably requires relatively more shader compiler effort to get to comparable levels of HW utilization. I'm not sure this is an issue but we should know more once the SI open source driver starts to run beneficially.
    Last edited by bridgman; 06-13-2012 at 02:55 PM.

  10. #30
    Join Date
    Jul 2010
    Posts
    449

    Default

    Mr. Bridgman, please stop letting facts and reason get in the way of complaints and conspiracies ;-)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •