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AMD Phenom 9500 Linux Performance

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  • #16
    We tried it with and without the TLB fix enabled -- in both cases it exhibited the same problems. I'll be delivering more benchmarks, etc next week once I return from Las Vegas for CES.


    I'll also be asking AMD-Legacy about this on Monday and see what those on the show floor have to say.
    Michael Larabel
    http://www.michaellarabel.com/

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    • #17
      Installs and runs FLAWLESSLY for me--CentOS 5.1

      Hey Guys. Just wanted to add my thoughts and experiences. In the last week I setup a new Phenom system. Phenom 9500, ECS - AMD 770 motherboard running CentOS 5.1 x86_64. I must say, I have had absolutely NO problems. No kernel panics, no stability problems whatsoever (I stress tested it for some time to see what would happen with stability and temperature). Maxing out all 4 cores I can't get the chip to run hotter than 64 degrees Celsius. Everything runs perfectly smooth. In fact, of the 4 linux servers I've built in the last year this one was the most painless. My benchmarks are incredible. My RAID 5 setup (4 SATA2 drives) is giving me 200 MB/sec read speeds, the processor is more than powerful enough, and everything is running as planned. Maybe some of these issues you are talking about are specific to Ubuntu 7.10? Or possibly a problem relating to older kernels? CentOS 5.1 just recently came out so maybe these problems have been fixed in the c5.1 kernel.

      Cheers and good lucking running the Phenom. I recommend it to EVERYONE out there! I was able to built a $3000 server for just $900 thanks to the Phenom 9500 and Fry's electronics great holiday deals!

      Devin

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      • #18
        You would be better off using a parallelized compressor for these tests, like parallel bzip http://compression.ca/pbzip2/

        (I've also used parallel gzip, but that doesn't show as dramatic gains.) You should also use multithreaded LAME.

        I've posted results from testing OpenLDAP with multiple cores/threads across Opteron 875, Opteron 2347, and Xeon 5345 here
        http://connexitor.com/blog/pivot/entry.php?id=191
        With code that's explicitly written for threading and concurrency, the AMD Barcelona design really shines.

        I think you need to state more clearly what your goal is in these benchmarks. If you really want to show the performance potential of a new platform, you should actually use test software that takes advantage of that platform. Probably that means not using any binary-based distros at all, and use gentoo instead. At least, for these SSE/media codec packages you ought to use a gcc with -march=amdfam10 support (AMD's 4.2 distro, or gcc 4.3 from CVS). The only test you've conducted here that shows any big advantage for the Phenom processor is compiling a kernel in parallel with make -j. All this test proves is that GNUmake works as designed. (By the way, I designed the parallel make support in GNUmake, over 16 years ago. So this test shows nothing new at all; it's been working fine for over a decade.)

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        • #19
          Just wanted to make a couple of comments. The syncing problems are probably due to the still shaky bios support and are not related to the TLB bug. In fact a lot of the early adopters had trouble running their systems at stock settings, although the situation seems to be improving. In fact at another forum several Phenom users are trying to get the bug appear so far with no success. This bug is not something that should concern desktop users and benchmarks should probably be done without the fix enabled as it can seriously hamper performance. Also to achieve a higher overclock try dropping the northbridge multiplier as it seems it cant clock much above 2GHz on most Phenoms while the cores can often hit 2.8GHz. Im curious about the kernel fix though. Is it it stable?

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          • #20
            Originally posted by highlandsun View Post

            I've posted results from testing OpenLDAP with multiple cores/threads across Opteron 875, Opteron 2347, and Xeon 5345 here
            http://connexitor.com/blog/pivot/entry.php?id=191
            With code that's explicitly written for threading and concurrency, the AMD Barcelona design really shines.
            Wow that seems very impressive .
            Code:
            Clients	Opteron 875	Opteron 2347	Xeon 5345
            1	3.1s	         2.9s	         1.6s
            2	6.7s	         6.5s	         12.6s
            3	12.1s	        10.5s	         20.5s
            4	18.1s	        14.9s	         44.6s




            Ive gonna be happy with my phenom thats fort sure

            Its also seems you need to run 4 vm to get the tlb bug appear, so i can safely run xen virtualization with atleast 2 vm system and the tlb fix disabled . Im considering a 64 bit Ubuntu 8.04 with a 32 bit linux and 32 bit windows vm:=)
            After all it would be a shame not to use the virtualization functions of the Phenom.
            Last edited by teroedni; 01-06-2008, 03:36 PM.

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            • #21
              Originally posted by teroedni View Post
              Wow that seems very impressive .
              Code:
              Clients	Opteron 875	Opteron 2347	Xeon 5345
              1	3.1s	         2.9s	         1.6s
              2	6.7s	         6.5s	         12.6s
              3	12.1s	        10.5s	         20.5s
              4	18.1s	        14.9s	         44.6s




              Ive gonna be happy with my phenom thats fort sure

              Its also seems you need to run 4 vm to get the tlb bug appear, so i can safely run xen virtualization with atleast 2 vm system and the tlb fix disabled . Im considering a 64 bit Ubuntu 8.04 with a 32 bit linux and 32 bit windows vm:=)
              After all it would be a shame not to use the virtualization functions of the Phenom.
              This is very interesting, I'm also quite interested in seeing benchmark results against other quad-core processors. Like the Q6600 for example.

              Now one question, mentioned above is the "Barcelona design"... is the Phenom a Barcelona series processor? In any way equivalent to either 875 or 2347?

              I'm looking forward to the comparative benchmarks!

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              • #22
                Phenom is the desktop variant, Barcelona is the server variant. The differences seem to be in HyperTransport level, SMP support, and apparently some differences in the cache controller.

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                • #23
                  a question offtopic. I know linux has different options for virtualizations... there's xen, there's kvm, etc...

                  but what about vmware? I plan on running virtualization on Ubuntu with vmware server, and the phenom 9500. any comments on that?

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                  • #24
                    Originally posted by bridgman View Post
                    Phenom is the desktop variant, Barcelona is the server variant. The differences seem to be in HyperTransport level, SMP support, and apparently some differences in the cache controller.
                    so i would imagine then that the Phenom numbers would certainly not be as good...? What sort of SMP support differences would there be?

                    I'd like to see a comparison to the Q6600, as well as with the server versions (Xeon 53xx).

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                    • #25
                      I think (but I'm not 100% sure) that Phenom numbers should be faster if anything.

                      From what I remember the smaller AM2-type packages don't include SMP support but the PhenomFX and Barcelone packages have more pins (1200+ IIRC) and presumably can include whatever is needed to support multiple CPUs on a board (ie 8+ cores).

                      Take all this with a grain of salt, of course -- I'm a graphics guy

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                      • #26
                        Are we talking SMP = Symmetric Multi Processing here, or something else? If yes, how come AM2 CPUs don't support it, when they're dual core? Or did I miss something?

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                        • #27
                          Originally posted by Thetargos View Post
                          Are we talking SMP = Symmetric Multi Processing here, or something else? If yes, how come AM2 CPUs don't support it, when they're dual core? Or did I miss something?
                          I believe he meant SMP support on the motherboard, so you could put dual processors, and 8 cores

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                          • #28
                            Yeah, SMP isn't really a good term to use these days, is it. Any dual core or quad core chip is already doing SMP -- we need a new TLA for "more than one CPU socket on a board".

                            Looks like on amd.com we just call multiple-socket systems "2P" or "4P", and talk about "SMP up to 2 sockets/8 cores" :

                            http://http://www.amd.com/us-en/asse...Comparison.pdf

                            Also appears that "Barcelona" was the development code name for what is now called "Quad Core Opteron", while "Agena" was the code name for what is now called "Phenom".

                            I don't feel like I cleared things up very much
                            Last edited by bridgman; 01-11-2008, 10:05 PM.

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                            • #29
                              Actually, you did. So it seems to be time for getting back go the 'MP' jargon (multiprocessor)

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                              • #30
                                Looks like most of the Phenom problems have been overstated then, I was thinking of buying one when I came across the Phoronix article. Anyone experiencing the 'psychedelic-colours' bug in Ubuntu (see article)?

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