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Thread: AMD Has Massive Radeon Patch Set - Power Management!

  1. #131
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    Quote Originally Posted by ciupenhauer View Post
    Yeah, with the oss. haven't tried KDE in a long while, but gnome-shell is just bad. I used to keep it at medium power settings, but not much improvement with max either. I tried everything that archlinux had to offer in terms of docs, no performance improvements.
    Have you tried gnome-shell recently? how did it work for you with the oss, and which distro, please

    with the new kernel release i will definitely make a new test, meanwhile my laptop is bricked because i tried to activate the IGP in the bios to compare performance, when the laptop does not support dual graphics, haha. If I had good drivers, I would have never done that
    What is your gpu? Do you have OGL hw acceleration? Are perf options turned on?

    My 5720M had no problem with any DE composition or no composition. Though it was rather hot experience But with DPM...

  2. #132
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    Quote Originally Posted by ciupenhauer View Post
    Yeah, with the oss. haven't tried KDE in a long while, but gnome-shell is just bad. I used to keep it at medium power settings, but not much improvement with max either. I tried everything that archlinux had to offer in terms of docs, no performance improvements.
    Have you tried gnome-shell recently? how did it work for you with the oss, and which distro, please

    with the new kernel release i will definitely make a new test, meanwhile my laptop is bricked because i tried to activate the IGP in the bios to compare performance, when the laptop does not support dual graphics, haha. If I had good drivers, I would have never done that
    I know that question was not directed at me, but before i went back to Windows permanently my dual HDD notebook had both Mageia 2 and Windows 8 in it.

    Keeping in mind that this is a 5 yr old notebook, Gnome 3 wasn't bad performance-wise (on Mageia 2, that is) actually even after forcing my HD3470 to run on the low power profile by performing echo low > /sys/class/drm/card0/device/power_profile to it. The reason overall performance was slow as molasses was simply because power management for AMD hardware (both the GPU and the CPU) were so bad that without forcibly throttling the hardware's respective frequencies to their lowest possible speeds the notebook can expel air hot enough to actually cause real pain to anybody who comes into contact with it.

    And obviously computing with a processor locked to 525MHz with the cpufreq powersave governor and the GPU set to use the 'low' power profile is going to be really bad, no matter how you look at it.

  3. #133
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    Thanks devs.

    I'm seriously thinking on switching from nvidia+blob to radeon+oss on a desktop PC.
    Can't wait for phoronix benchmarks;
    meanwhile, anybody can say me how are radeon+oss+linux performance vs radeon+windows? on a mid-end graphic card with oss driver "tweaked"?

    thanks.

  4. #134
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    Quote Originally Posted by przemoli View Post
    What is your gpu? Do you have OGL hw acceleration? Are perf options turned on?

    My 5720M had no problem with any DE composition or no composition. Though it was rather hot experience But with DPM...
    Mine is a 5870m, can't remember when was the last time i tried to tweak driver options, i just expected it to work as it is. There is hardware acceleration, don't get me wrong, i didn't have 2-3 fps. But there were many lags in animations, unsmooth transitions, etc as a constant behaviour. fglrx otherwise works ok, for the most part. but I don't want that as a final solution, with wayland around the corner

    Which perf options do you mean?

    In any case, anyone with info about their performance with gnome, for example, is welcome. I always had the feeling something was just wrong, since the general idea is that 2d is better on the oss :/

  5. #135
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    Quote Originally Posted by kokoko3k View Post
    meanwhile, anybody can say me how are radeon+oss+linux performance vs radeon+windows? on a mid-end graphic card with oss driver "tweaked"?

    thanks.
    Don't know if there are such benchmarks, but the closed-source Linux Catalyst driver shares most of its code with the Windows driver. C

    omparisons against the Catalyst blob on Linux show that oss performance is often at 80% or more of the blob performance. It does depend on the game, though, some are considerably slower.

  6. #136

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    Quote Originally Posted by ciupenhauer View Post
    Yeah, with the oss. haven't tried KDE in a long while, but gnome-shell is just bad. I used to keep it at medium power settings, but not much improvement with max either. I tried everything that archlinux had to offer in terms of docs, no performance improvements.
    Have you tried gnome-shell recently? how did it work for you with the oss, and which distro, please
    Give Fedora a try.(Its a GNOME based distro anyways) For one, Red Hat employs a number of Gnome devs; for two they employ a number of xorg and specifically driver devs.(Dave Airlie comes to mind)

    For three, Fedora does their routine "Graphics Test Week" in which people(such as you) who have specific problems can get relief.

    http://www.phoronix.com/scan.php?pag...tem&px=MTM1NzM

    But as far as the drivers go, Fedora is more cutting edge than most considering all the driver devs they employ. That's what you should use.

  7. #137
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    Big thanks to all developers, AMD and people involved to make this posible!

  8. #138
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    Quote Originally Posted by ciupenhauer View Post
    Having features is all fine, but they are of no use to me if the basic performance of the driver renders a modern environment like gnome-shell literally unusable. I'm surprised in so many years of 'hard work' as you say, they could not even get this right - a simple IGP from intel can pull infinitely better performance on the desktop than what my dedicated can.

    Thanks for the answer, though. I asked because I am seriously considering switching to an nvidia chip, but now maybe it's worth waiting a while still.
    I have to agree with others... Something seems off with your system. I use a Radeon 5400 on my machine at work w/ 2x 1080p screens for 8+ hours a day in Gnome Shell (Ubuntu 13.04). The performance that I get is more than acceptable for the Java + Web Dev work I do.

    CPU: i7-2600k
    Mem: 8GB DDR3
    GPU: Radeon 5400-series
    Monitors: 2x Dell 1080p
    Kernel: currently 3.9.x
    Mesa/DRM/glamor/llvm: Git master (for the purposes of improving the drivers).

  9. #139
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    Quote Originally Posted by ChrisXY View Post
    It should already work if linux, x.org, xrandr, mesa and xf86-video-ati and possibly libdrm is recent enough.
    Wow, cool! Thank you! I'll give it a try.

  10. #140
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    Quote Originally Posted by ciupenhauer View Post
    Yeah, with the oss. haven't tried KDE in a long while, but gnome-shell is just bad. I used to keep it at medium power settings, but not much improvement with max either. I tried everything that archlinux had to offer in terms of docs, no performance improvements.
    Have you tried gnome-shell recently? how did it work for you with the oss, and which distro, please

    with the new kernel release i will definitely make a new test, meanwhile my laptop is bricked because i tried to activate the IGP in the bios to compare performance, when the laptop does not support dual graphics, haha. If I had good drivers, I would have never done that
    Applies only if you have AMD CPU or any other cpufreq-driven non-intel CPU. Intel CPUs use newer pstate driver, completely omitting CPU load polling (much more efficient).
    This will reduce CPU bottleneck of your graphics pipe on small loads (text scrolling, desktop effects and such).

    Set wake-up frequency for ondemand to 25% from 95%:
    echo "25" > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold

    Reduce state checking time, forcing CPU to stay up or down longer. Will improve response and performance, but slight risk to worsen power usage. Using higher values will lead to response loss, but higher performance:
    echo "100" > /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor
    Comparison of effect on compilation:
    Code:
    sampling_down_factor    merge time
    1 (default)             1 minute and 59 seconds.
    20                      1 minute and 47 seconds.
    100                     1 minute and 29 seconds.
    150                     1 minute and 24 seconds.
    200                     1 minute and 22 seconds.
    300                     1 minute and 20 seconds.
    500                     1 minute and 12 seconds.
    1500                    1 minute and 7 seconds
    If you have AMD APU I suggest you to try newest PM patchset, prior versions have TDP frequencies locked at safe ranges all time. This results in 1/3 of performance for sake of not burning the chip.
    To override (only desktops) see this post, should not be needed with new PM code anymore.
    Last edited by brosis; 06-27-2013 at 12:24 PM.

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