Multi-core SPEC CPU2006

For the record, we do not believe that the SPEC CPU "Rate" metric has much value for estimating server CPU performance. Most applications do not run lots of completely separate processes in parallel; there is at least some interaction between the threads. But since the benchmark below caused so much discussion, we wanted to satisfy the curiosity of our readers. 

Does the EPYC7601 really have 47% more raw integer power? Let us find out. Though please note that you are looking at officially invalid base SPEC rate runs, as we still have to figure out how to tell the SPEC software that our "invalid" flag "-Ofast" is not invalid at all. We did the required 3 iterations though. 

Subtest Application type Xeon
E5-2699 v4
@ 2.8
Xeon
8176
@ 2.8
EPYC
7601
@2.7
EPYC 
Vs
Broadwell EP
EPYC 
vs
Skylake
SP
400.perlbench Spam filter 1470 1980 2020 +37% +2%
401.bzip2 Compression 860 1120 1280 +49% +14%
403.gcc Compiling 960 1300 1400 +46% +8%
429.mcf Vehicle scheduling 752 927 837 +11% -10%
445.gobmk Game AI 1220 1500 1780 +46% +19%
456.hmmer Protein seq. analyses 1220 1580 1700 +39% +8%
458.sjeng Chess 1290 1570 1820 +41% +16%
462.libquantum Quantum sim 545 870 1060 +94% +22%
464.h264ref Video encoding 1790 2670 2680 +50% -0%
471.omnetpp Network sim 625 756 705 (*) +13% -7%
473.astar Pathfinding 749 976 1080 +44% +11%
483.xalancbmk XML processing 1120 1310 1240 +11% -5%

(*) We had to run 471.omnetpp with 64 threads on EPYC: when running at 128 threads, it gave errors. Once solved, we expect performance to be 10-20% higher. 

Ok, first a disclaimer. The SPECint rate test is likely unrealistic. If you start up 88 to 128 instances, you create a massive bandwidth bottleneck and a consistent CPU load of 100%, neither of which are very realistic in most integer applications. You have no synchronization going on, so this is really the ideal case for a processor such as the AMD EPYC 7601. The rate test estimates more or less the peak integer crunching power available, ignoring many subtle scaling problems that most integer applications have.  

Nevertheless, AMD's claim was not farfetched. On average, and using a "neutral" compiler with reasonable compiler settings, the AMD 7601 has about 40% (42% if you take into account that our Omnetpp score will be higher once we fixed the 128 instances issue) more "raw" integer processing power than the Xeon E5-2699 v4, and is even about 6% faster than the Xeon 8176. Don't expect those numbers to be reached in most real integer applications though. But it shows how much progress AMD has made nevertheless...

SMT Integer Performance With SPEC CPU2006 Multi-Threaded Integer Performance
POST A COMMENT

219 Comments

View All Comments

  • ddriver - Tuesday, July 11, 2017 - link

    Gotta love the "you don't care about the xeon prices" part thou. Now that intel don't have a performance advantage, and their product value at the high end is half that of amd, AT plays the "intel is the better brand" card. So expected... Reply
  • OZRN - Wednesday, July 12, 2017 - link

    You need some perspective. Database licensing for Oracle happens per core, where Intel's performance is frequently better in a straight line and since they achieve it on lower core count it's actually better value for the use case. Higher per-CPU cost is not so much of a concern when you pay twice as much for a processor license to cover those cores.

    I'm an AMD fan and I made this account just for you, sweetheart, but don't blind yourself to the truth just because Intel has a history of shady business. In most regards this is a balanced review, and where it isn't, they tell you why it might not be. Chill out.
    Reply
  • ddriver - Thursday, July 13, 2017 - link

    You are such a clown. Nobody, I repeat, NOBODY on this planet uses 64 core 128 thread 512 gigabytes of ram servers to run a few MB worth of database. You telling me to get pespective thus can mean only two things, that you are a buthurt intel fanboy troll or that you are in serious need of head examination. Or maybe even both. At any rate, that perfectly explains your ridiculously low standards for "balanced review". Reply
  • Notmyusualid - Friday, July 14, 2017 - link

    It seems no matter what opinion someone presents that might exhibit Intel in a better light - you are going to hate it anyway.

    What a life you must lead.
    Reply
  • OZRN - Friday, July 14, 2017 - link

    No, they don't. They use them to host gigabytes to terabytes worth of mission critical databases, with specified amounts of cores dedicated to seperate environments of hard partitioned data manipulation. I've done some quick math for you and in an average setup of Enterprise Edition of Oracle DB, with only the usually reported options and extras, this type of database would cost over $3.7m to run on *64 cores alone*. At this point, where is your hardware sunk costs argument?

    Also, I don't think anyone here is impressed by your ability to immediately personally insult people making valid points. Good luck finding your head that deep in your colon.
    Reply
  • CajunArson - Tuesday, July 11, 2017 - link

    "All of our testing was conducted on Ubuntu Server "Xenial" 16.04.2 LTS (Linux kernel 4.4.0 64 bit). The compiler that ships with this distribution is GCC 5.4.0."

    I'd recommend using a more updated distro and especially a more up to date compiler (GCC 5.4 is only a bug-fix release of a compiler from *2015*) if you want to see what these parts are truly capable of.

    Phoronix does heavy-duty Linux reviews and got some major performance boosts on the i9 7900X simply by using up to date distros: http://www.phoronix.com/scan.php?page=article&...

    Considering that Purley is just an upscaled version of the i9 7900X, I wouldn't be surprised to see different results.
    Reply
  • CajunArson - Tuesday, July 11, 2017 - link

    As a followup to my earlier comment, that Phoronix story, for example, shows a speedup factor of almost 5X on the C-ray benchmark simply by using a modern distro with some tuning for the more modern Skylake architecture.

    I'm not saying Purley would have a 5X speedup on C-ray per-say, but I'd be shocked if it didn't get a good boost using modern software that's actually designed for the Skylake architecture.
    Reply
  • CoachAub - Wednesday, July 12, 2017 - link

    Keywords: "actually designed for the Skylake architecture". Will there be optimizations for AMD Epyc chips? Reply
  • mkozakewich - Friday, July 14, 2017 - link

    If it's a reasonable optimization, it makes sense to include it in the benchmark. If I were building these systems, I'd want to see benchmarks that resembled as closely as possible my company's workflow. (Which may be for older software or newer software; neither are inherently more relevant, though benchmarks on newer software will usually be relevant further into the future.) Reply
  • CajunArson - Tuesday, July 11, 2017 - link

    And another followup: The time kernel compilation on the i9 7900X got almost a factor of 2 speedup over the Ubuntu 16.04 using more modern distros. Reply

Log in

Don't have an account? Sign up now