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Thread: The Linux 3.13 Kernel Is A Must-Have For AMD RadeonSI Users

  1. #1
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    Default The Linux 3.13 Kernel Is A Must-Have For AMD RadeonSI Users

    Phoronix: The Linux 3.13 Kernel Is A Must-Have For AMD RadeonSI Users

    The Linux 3.13 kernel that will be released in the very near future is very worth the upgrade if you are a RadeonSI user -- in particular, the Radeon HD 7000 series GPUs and newer on the Gallium3D Linux graphics driver -- but other open-source graphics driver users as well may also see nice improvements in the new kernel release. Here's some benchmarks showing off the gains found with the Linux 3.13 kernel for Radeon HD and R9 graphics cards.

    http://www.phoronix.com/vr.php?view=19688

  2. #2
    Join Date
    Oct 2013
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    Impressive.

    BTW I've just disabled adblock for phoronix.com domain, I don't know why I didn't that before...

  3. #3
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    That's pretty huge. I would love to see the difference in more modern games, however -- perhaps Dota2 or TF2, or if anyone has any comparisons between Wine performance.

  4. #4
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    Thank you Michael for the benchmarks.

    On a small note: the fix for enabling all RadeonSI render backends also made it to kernel 3.12.7, which version were you using in your test? On my HD7850 I didn't notice any improvements, but maybe I wasn't affected by it in the first place.

    https://www.kernel.org/pub/linux/ker...angeLog-3.12.7

    Code:
    commit f3c1f0d0aaf20f9dee35ae99ec8b8705af4dc60e
    Author: Marek Olk <marek.olsak@amd.com>
    Date:   Sun Dec 22 02:18:00 2013 +0100
    
        drm/radeon: fix render backend setup for SI and CIK
        
        commit 9fadb352ed73edd7801a280b552d33a6040c8721 upstream.
        
        Only the render backends of the first shader engine were enabled. The others
        were erroneously disabled. Enabling the other render backends improves
        performance a lot.
        
        Unigine Sanctuary on Bonaire:
          Before: 15 fps
          After:  90 fps
        
        Judging from the fan noise, the GPU was also underclocked when the other
        render backends were disabled, resulting in horrible performance. The fan is
        a lot noisy under load now.
        
        Signed-off-by: Marek Olk <marek.olsak@amd.com>
        Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
        Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  5. #5

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    Quote Originally Posted by r1348 View Post
    Thank you Michael for the benchmarks.

    On a small note: the fix for enabling all RadeonSI render backends also made it to kernel 3.12.7, which version were you using in your test?
    The versions are shown on the system table in the article...

  6. #6

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    Quote Originally Posted by dffx View Post
    That's pretty huge. I would love to see the difference in more modern games, however -- perhaps Dota2 or TF2
    See the note in the article why Source Engine games weren't used.

  7. #7
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    Also.. http://kparal.wordpress.com/2014/01/...edora-rawhide/
    I was running on nodebug kernel 3.13 rc8 (beware of my mistakes).
    There, modern games

  8. #8
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    Maybe now AMD Steam Box can use RadeonSI?

  9. #9
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    Apr 2012
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    Hi,

    Anyone know how the FirePro W600 is performing with RadeonSI? I'm wondering about W600 (instead of 2x NVS 510) for a six monitor setup.

    Thanks!

  10. #10
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    I didn't notice any performance increase with 3.13 on HD 7950.
    ## VGA ##
    AMD: X1950XTX, HD3870, HD5870
    Intel: GMA45, HD3000 (Core i5 2500K)

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