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AMD Radeon Catalyst: Windows 7 vs. Ubuntu 12.04 LTS

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  • devius
    replied
    Originally posted by Qaridarium
    I'm sure the next intel "APU" generation will rape AMD completely on the opensource side.
    The current generation is already doing that. I've been an AMD fan since the glorious Athlon XP days, but a few months ago I bought a crappy Pentium G840 and the graphics performance is so much better than it ever was with my former Athlon II + 785G system. The worst part is that the HD4200 in the 785G chipset is supposed to be a little better than the Intel HD graphics in the G840. What a difference good drivers make!

    Originally posted by Qaridarium
    and on the CPU side most of the time you can save 20euro if you buy a amd cpu but what does this matters if you need to buy a 80€ graphic card because the amd APUs perform like shit with the opensource driver?
    right now you get a faster cpu on intel side and a faster gpu on amd side but only if you use a closed source driver
    with opensource drivers you get a faster cpu on intel side and a faster gpu on intel side and a lower price ..LOL!
    Actually... the graphics performance with Catalyst is reasonable when it comes to stand-alone full screen 3D apps, but the desktop performance is terrible. In the case of the systems I mentioned above it's much worse than the lowly Pentium G840. I can't use the 3D variant of Unity or Gnome Shell with Catalyst.

    Originally posted by Qaridarium
    and the time for big PCIe graphic-cards are over
    I would stop that sentence there. In a few more years discrete GPUs will be a thing of the past. The tendency is clearly to integrate everything into a single chip.
    Last edited by devius; 26 May 2012, 07:00 AM.

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  • RealNC
    replied
    Originally posted by mitcoes View Post
    Ubuntu Studio is also LTE

    It has a low latency kernel

    Kernel that can be installed for testing

    MS WOS has a 300 Hz kernel, Ubuntu a 100 Hz one, and Ubuntu Studio a 1000 Hz
    Windows can switch to 1000Hz when needed. This happens when a multimedia timer is requested by an application. (Happens when starting Media Player, for example.)

    Leave a comment:


  • curaga
    replied
    Yes, I agree they should get a dynamic option stable and enabled by default. But for measuring the open drivers on the APU, it should be done with the high profile too.

    (when will we see the clocks moved out of debugfs? It's not a debug action)

    Leave a comment:


  • smitty3268
    replied
    Originally posted by Qaridarium
    then the concluding is the same with the sentence: if you want want to be a "hacker" who tweak your driver you better buy a Intel system.
    Why? The intel defaults are much better, so they wouldn't need to tweak the driver then.

    Leave a comment:


  • curaga
    replied
    We need an AMD APU test with the high performance profile before we can conclude that.

    Leave a comment:


  • baffledmollusc
    replied
    To be honest, I'm pleasantly surprised how much on par the Windows and Linux drivers versions are. I wouldn't have expected that, and removes one reason companies might trot out for not porting games to Linux.

    To put in my two cents regarding the benchmarks on stock vs tweaked configurations, I much prefer seeing stock results. Sure, I could tweak my system six ways to Sunday, but, frankly, I really can't be bothered. I suspect most people fall into that category too, or the the category where they have no clue *how* to tweak their system. I suspect the number of people who bother optimizing their system is a very small percentage, so a stock comparison gives the most information about how drivers will perform for most people.

    That said, out of academic interest, I would always be curious to see just how much performance could be obtained by different kernel configs, window managers, XOrg config file tweaks...

    Leave a comment:


  • ohdiego
    replied
    Is there any step by step guide for AMD CATALYST installation for Precise Pangolin, I used to have no problems on Lucid but now in Precise I cant find the way to install it correctly

    Leave a comment:


  • davgarcia
    replied
    Originally posted by kraftman View Post
    Ubuntu has 250Hz kernel. Suspend composition should give better results under Ubuntu, but it's disabled for now.
    Moreover, Ubuntu has CONFIG_NO_HZ and CONFIG_HIGH_RES_TIMERS switched on:
    Code:
    $ cat /boot/config-$(uname -r) | grep -E "HZ|TIMERS"
    CONFIG_RCU_FAST_NO_HZ=y
    CONFIG_NO_HZ=y
    CONFIG_HIGH_RES_TIMERS=y
    # CONFIG_HZ_100 is not set
    CONFIG_HZ_250=y
    # CONFIG_HZ_300 is not set
    # CONFIG_HZ_1000 is not set
    CONFIG_HZ=250
    CONFIG_MACHZ_WDT=m
    Which means it can use much higher resolution timers. Have a look here:


    All in all, I think Ubuntu default settings make for a good enough gaming platform (there's room for improvement though).

    Leave a comment:


  • kraftman
    replied
    Originally posted by mitcoes View Post
    Ubuntu Studio is also LTE

    It has a low latency kernel

    Kernel that can be installed for testing

    MS WOS has a 300 Hz kernel, Ubuntu a 100 Hz one, and Ubuntu Studio a 1000 Hz
    Ubuntu has 250Hz kernel. Suspend composition should give better results under Ubuntu, but it's disabled for now.

    Leave a comment:


  • devius
    replied
    What I'd like to see is more graphics cards. Can we expect the same performance differences with lower specced cards? Oh, and BTW it seems that nvidia has more tests that favor Ubuntu. I'd like to see Qaridarium unravel that one

    Leave a comment:

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