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AMD Bulldozer Performance On Ubuntu 12.10

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  • AMD Bulldozer Performance On Ubuntu 12.10

    Phoronix: AMD Bulldozer Performance On Ubuntu 12.10

    For those having computers with AMD FX "Bulldozer" processors, here are some benchmarks showing some of the performance improvements made -- and regressions -- in upstream GCC and the Linux kernel that can be found when upgrading to the forthcoming Ubuntu 12.10.

    http://www.phoronix.com/vr.php?view=17901

  • #2
    Useless benchmark

    It is a useless benchmark because the CPU isn't compared against any other CPU.

    Comment


    • #3
      Originally posted by uid313 View Post
      It is a useless benchmark because the CPU isn't compared against any other CPU.
      That was not the premise of the article.

      Comment


      • #4
        Test with another CPU

        I have a AMD bulldoser processor and I can say it sucks badly long term. It starts off really fast, but once you leave your system on for a hour or so it gets so slow that even logging out takes close to a minute.

        Anyways, could you do a comparison test between the 8150 and the I7 2600k/ivy bridge? I want to see the increase in performance before upgrading to a intel machine.

        Comment


        • #5
          Originally posted by ruinairas View Post
          I have a AMD bulldoser processor and I can say it sucks badly long term. It starts off really fast, but once you leave your system on for a hour or so it gets so slow that even logging out takes close to a minute.
          That sounds really weird. Sure it's caused by the CPU and not by swapping maybe?
          Also ever tried gentoo linux (everything compiled with march=native) ? This would be some benchmark I would like: Ubuntu vs Gentoo on AMD Bulldozer (and AMD Phenom II as reference).

          Comment


          • #6
            Originally posted by ruinairas View Post
            I have a AMD bulldoser processor and I can say it sucks badly long term. It starts off really fast, but once you leave your system on for a hour or so it gets so slow that even logging out takes close to a minute.

            Anyways, could you do a comparison test between the 8150 and the I7 2600k/ivy bridge? I want to see the increase in performance before upgrading to a intel machine.
            Sounds like a memory issue to me too. I would tend to say its a memory leak somewhere.

            Try this: switch to tty1. Login. Launch htop, note memory and swap usage and go away. When you return, check memory and swap usage.
            Also check for HDD activity. Perhaps cirtain components were removed from memory as not needed anymore, due to not being adressed. If you claim its CPU, the memory load should be same and hdd should not be accessed intensively while you login back.

            Comment


            • #7
              As a Bulldozer owner, this sucks. I know a lot of attention is given to Intel processors, but AMD could use its fair share of attention.

              Comment


              • #8
                Testing

                Originally posted by crazycheese View Post
                Sounds like a memory issue to me too. I would tend to say its a memory leak somewhere.

                Try this: switch to tty1. Login. Launch htop, note memory and swap usage and go away. When you return, check memory and swap usage.
                Also check for HDD activity. Perhaps cirtain components were removed from memory as not needed anymore, due to not being adressed. If you claim its CPU, the memory load should be same and hdd should not be accessed intensively while you login back.
                Okay, I'll do that now.

                Comment


                • #9
                  Originally posted by ruinairas View Post
                  I have a AMD bulldoser processor and I can say it sucks badly long term. It starts off really fast, but once you leave your system on for a hour or so it gets so slow that even logging out takes close to a minute.
                  I have a FX8150 and I can not confirm that. It takes me ~5secs to either log in or log out. Having Chrome open slows it down by another ~ 5secs (Kubuntu 12.04 64).

                  Comment


                  • #10
                    Originally posted by uid313 View Post
                    It is a useless benchmark because the CPU isn't compared against any other CPU.
                    Oh, it's very useful in shutting up all those that claimed bulldozer only sucked because "software isn't optimized yet".

                    Comment


                    • #11
                      No change

                      Originally posted by crazycheese View Post
                      Sounds like a memory issue to me too. I would tend to say its a memory leak somewhere.

                      Try this: switch to tty1. Login. Launch htop, note memory and swap usage and go away. When you return, check memory and swap usage.
                      Also check for HDD activity. Perhaps cirtain components were removed from memory as not needed anymore, due to not being adressed. If you claim its CPU, the memory load should be same and hdd should not be accessed intensively while you login back.

                      I did the test for well over an hour and their wasn't a serious change in swap/memory usuage. When I think about it Ubuntu 12.04 got really slow after my UFEI auto "overclocked for optimal performance" (Asus MA97 Motherboard). Is there a possible error with the cpu freq settings? If so how can I find out, and how do I fix it. I've noticed it still says 3.6GHZ despite the fact it's at 4.2ghz. (I tested with default 3.6ghz, but it's still slow.)

                      Current hardware:

                      Nvidia Geforce GTX 550 ti (Gigabyte)
                      Asus MA97 (Standard) motherboard
                      4GB Jigsaw Ram
                      Thermaltake 750W power supply.
                      Blue Scorpio 500GB HDD 5400/Intel 30gb SSD
                      Rosewell Wireless PCI
                      AMD FX 4100 Quad Core Processor @3.6GHZ/4.2
                      Ubuntu 12.04/12.10

                      Comment


                      • #12
                        An article comparing Intel Core i5 and AMD FX-8xxx would definitely be more useful to me!! These processors are at compariable price points just now... I really don't know whether the AMD FX performance sucks under Linux. I am sure I am not alone in wanting this comparision!!

                        I doubt many people care if 12.10 is marginally faster or slower than 12.04. People either ride the bleeding edge or add PPA's to the LTS. They aren't going to change their behavour as a result of these benchmarks...

                        Bob

                        Comment


                        • #13
                          Originally posted by ruinairas View Post
                          I did the test for well over an hour and their wasn't a serious change in swap/memory usuage. When I think about it Ubuntu 12.04 got really slow after my UFEI auto "overclocked for optimal performance" (Asus MA97 Motherboard). Is there a possible error with the cpu freq settings? If so how can I find out, and how do I fix it. I've noticed it still says 3.6GHZ despite the fact it's at 4.2ghz. (I tested with default 3.6ghz, but it's still slow.)

                          Current hardware:

                          Nvidia Geforce GTX 550 ti (Gigabyte)
                          Asus MA97 (Standard) motherboard
                          4GB Jigsaw Ram
                          Thermaltake 750W power supply.
                          Blue Scorpio 500GB HDD 5400/Intel 30gb SSD
                          Rosewell Wireless PCI
                          AMD FX 4100 Quad Core Processor @3.6GHZ/4.2
                          Ubuntu 12.04/12.10
                          Heat? Not enough voltage being applied?

                          Comment


                          • #14
                            Sounds like you have a conflict with C&Q (cool and Quite)

                            Leave off the MB OC.

                            It is most likely disabling the default turbo up and turbo down...consequently you are running at 100% all the time, resulting in thermal throttling due to insufficient cooling. (you can certainly run 100% all the time with aftermarket coolers/ watercooling.)

                            MB control of OC is notoriously horrible/ easily outdated.
                            Compound this this Linux that does not always support every CPU correctly and you are asking for trouble.

                            I would manually OC or set at default.

                            Comment


                            • #15
                              Originally posted by mdk777 View Post
                              It is most likely disabling the default turbo up and turbo down...consequently you are running at 100% all the time, resulting in thermal throttling due to insufficient cooling. (you can certainly run 100% all the time with aftermarket coolers/ watercooling.)
                              That's insane. No CPU will be throttled as long as it's running at stock speed. The bundled cooler is designed to sustain at least that much heat.

                              Comment

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