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Previewing The Radeon DPM Performance On Linux 3.11

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  • Previewing The Radeon DPM Performance On Linux 3.11

    Phoronix: Previewing The Radeon DPM Performance On Linux 3.11

    As promised, now that Linux 3.11-rc1 has been released, it's time for the new dynamic power management support of the Linux 3.11 kernel for AMD Radeon graphics. This first article previews the possible OpenGL performance gains for an AMD APU when enabling "DPM" for allowing the graphics core to properly re-clock based upon its workload.

    http://www.phoronix.com/vr.php?view=18925

  • #2
    Do I understand it right? The open source drivers will be in a few cases faster the propertiary ones?

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    • #3
      Really? This must be the most noninteresting benchmark I've ever seen!

      Everybody already knew, that higher clocks get higher performance. Where is the power consumption graph? Where is the comparison to Catalyst? Did you set the old Power-management to powersave or performance (what clocks were chosen)?

      Comment


      • #4
        Originally posted by Ragas View Post
        Really? This must be the most noninteresting benchmark I've ever seen!

        Everybody already knew, that higher clocks get higher performance. Where is the power consumption graph? Where is the comparison to Catalyst? Did you set the old Power-management to powersave or performance (what clocks were chosen)?
        Maybe that's why the article title started with "Preview".

        Also, looks like Urban Terror is bottlenecked somewhere other than the GPU (or at least the GPU/VRAM clocks didn't make much of a difference).

        Comment


        • #5
          Please bench a10-5800K because a10-6800k is way too immature to be interesting. Also please bench both LLVM and sb backends and don't forget catalyst (no need for 3.10, 3.11 with dpm off is enough). Pretty please?

          P.S.
          Nice selection of benchmarks but please add heaven and left 4 dead 2 to the mix.
          Last edited by darkbasic; 07-16-2013, 11:51 AM.
          ## VGA ##
          AMD: X1950XTX, HD3870, HD5870
          Intel: GMA45, HD3000 (Core i5 2500K)

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          • #6
            Fantastic. performance temperature and wattage review versus catalyst will be exciting!

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            • #7
              I think we have to give Michael more time to finish the benchmarks.
              I bet the final benches will be massive.

              time to install steam and play dota 2.

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              • #8
                Hurray to AMD! Power management patches ARE epic!

                AMD finally got it right! I'm proud to confirm their "epic" power management patches also perform greatly on HD5000-based GPUs.

                For me, HD5000-series desktop GPU with dpm power management is about 10C cooler than it would be "by default" without setting low power profile by hands. And no screen blinking on re-clock. And GPU goes up very fast, so heavy loads haven't degraded in terms of performance. Really noteworthy improvement!
                Last edited by 0xBADCODE; 07-16-2013, 12:01 PM.

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                • #9
                  These are fantastic results, I'm delighted to see such huge performance improvements, roll on the über-benchmark!

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                  • #10
                    This can never be said enough: Thank you Bridgman,Tom, Alex, and anyone else involved in the OSS effort.

                    I've been recommending AMD products mainly because their OSS support, it feels great to be proven right. Going to test DPM on a laptop right now.


                    Serafean

                    PS : A special compliment goes to bridgman for concentrating on development and not on tweaking the old PM code. Taking the flak from all of us must have been a bit harsh

                    Comment


                    • #11
                      Originally posted by Filar View Post
                      Do I understand it right? The open source drivers will be in a few cases faster the propertiary ones?
                      Correct, but in some cases slower.

                      Originally posted by Ragas View Post
                      Really? This must be the most noninteresting benchmark I've ever seen!

                      Everybody already knew, that higher clocks get higher performance. Where is the power consumption graph? Where is the comparison to Catalyst? Did you set the old Power-management to powersave or performance (what clocks were chosen)?
                      Ha, its one of the most epic benchmarks in history. The performance is result of DPM+Vadim patch+Marek+Deutcher and many others! Its by far not only clocks.

                      Power consumption graph is not interesting because DPM works very same way as Catalyst.
                      Comparison to Catalyst is actually irrelevant. Performance is roughly same. But its opensource driver, that's the prime advantage. Support till hardware is dead, support for other operating systems, full integration, full security, no kernel tainting. All those not possible with catalyst, ever.

                      Powersave is not working right now, so it was performance.

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                      • #12
                        As a question, is there any major difference in performance between the new DPM code and the old static PM on high? And if so, will this apply to all the supported cards?

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                        • #13
                          Originally posted by Hamish Wilson View Post
                          As a question, is there any major difference in performance between the new DPM code and the old static PM on high? And if so, will this apply to all the supported cards?
                          From what I can see, this was tested on an APU, which have had the issue where static PM didn't do anything (the clocks were always set to default). The performance difference shouldn't be nearly like that on dedicated cards. But it's not supposed to be, the DPM code is for energy consumption and thermal management.

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                          • #14
                            Originally posted by brosis View Post
                            Power consumption graph is not interesting because DPM works very same way as Catalyst. Comparison to Catalyst is actually irrelevant.
                            Well, it's supposed to work the same way in theory, but it would be nice to confirm that it works that way in practice.

                            Comment


                            • #15
                              I've been recommending AMD products

                              Originally posted by Serafean View Post
                              I've been recommending AMD products mainly because their OSS support, it feels great to be proven right.
                              You were recommending products with no proof?
                              You're not a very good friend!

                              j/k

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