Assessing Cavium's ThunderX2: The Arm Server Dream Realized At Last
by Johan De Gelas on May 23, 2018 9:00 AM EST- Posted in
- CPUs
- Arm
- Enterprise
- SoCs
- Enterprise CPUs
- ARMv8
- Cavium
- ThunderX
- ThunderX2
Apache Spark 2.x Benchmarking
Last, but not least, we have Apache Spark. Apache Spark is the poster child of Big Data processing. Speeding up Big Data applications is the top priority project at the university lab I work for (Sizing Servers Lab of the University College of West-Flanders), so we produced a benchmark that uses many of the Spark features and is based upon real world usage.
The test is described in the graph above. We first start with 300 GB of compressed data gathered from the CommonCrawl. These compressed files are a large amount of web archives. We decompress the data on the fly to avoid a long wait that is mostly storage related. We then extract the meaningful text data out of the archives by using the Java library "BoilerPipe". Using the Stanford CoreNLP Natural Language Processing Toolkit, we extract entities ("words that mean something") out of the text, and then count which URLs have the highest occurrence of these entities. The Alternating Least Square algorithm is then used to recommend which URLs are the most interesting for a certain subject.
To get better scaling, we run with 4 executors. Researcher Esli Heyvaert reconfigured the Spark benchmark so it could run on Apache Spark 2.1.1.
Here are the results:
(*) EPYC and Xeon E5 V4 are older results, run on Kernel 4.8 and a slightly older Java 1.8.0_131 instead of 1.8.0_161. Though we expect that the results would be very similar on kernel 4.13 and Java 1.8.0_161, as we did not see much difference on the Skylake Xeon between those two setups.
Data processing is very parallel and extremely CPU intensive, but the shuffle phases require a lot of memory interactions. The time spent on storage I/O is negligible. The ALS phase does not scale well over many threads, but is less than 4% of the total testing time.
The ThunderX2 delivers 87% of the performance of the twice as expensive EPYC 7601. Since this benchmark scales well with the number of cores, we can estimate that the Xeon 6148 will score around 4.8. So while the ThunderX2 can not really threaten the Xeon Platinum 8176, it gives the Gold 6148 and its ilk a run for their money.
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DrizztVD - Wednesday, May 23, 2018 - link
It amazes me how the one big advantage ARM could have is the power efficiency, yet no power efficiency numbers in this review? It's like someone just isn't thinking about what can best showcase the ARM advantage and testing it.boeush - Thursday, May 24, 2018 - link
You must have missed this bit:"So as is typically the case for early test systems, we are not able to do any accurate power comparisons.
In fact, Cavium claims that the actual systems from HP, Gigabyte and others will be far more power efficient."
This was an early (and apparently quite buggy, especially from the power management standpoint) test system. It's not representative of final production systems in these respects, so doing what you request on it would only put a very crude lower bound on efficiency, at best.
That's why the final section of the write-up has a title ending in ": so far"... (obviously, there will be more to come if/when real production-quality systems are available for benchmarking/analysis.)
ZolaIII - Thursday, May 24, 2018 - link
It's broken currently on the MB. If you want to see real power/performance metrics for a SoC made on comparable lithography to the lintels 14 nm (aka TSMC 10nm) & with optimised software read this:https://blog.cloudflare.com/neon-is-the-new-black/
drwho9437 - Wednesday, May 23, 2018 - link
Thanks Johan, I've been reading since Ace's. I can't believe it has been more almost 20 years. Even though I don't work in this market I still read everything you write.JohanAnandtech - Friday, May 25, 2018 - link
It was indeed almost 20 years ago that I published my first article about the K6-2 vs Pentium MMX. And Anand's star was about to rise with the launch of the K6-3 :-).Spatz - Wednesday, May 30, 2018 - link
Wow. Aces hardware... that used to be my go to for hardware reviews back in the day. I can’t believe your still at it! This article was great. Keep up the good work.beginner99 - Thursday, May 24, 2018 - link
So it for sure is an option. however I d not get the focus on price. The CPU cost is a small fraction of the total server cost and a tiny if infrastructure cost (network, HVAC,...) is included. Add to that the software and data running on that server and if your CPU is 5% faster at same power it costing $5000 more might be totally worth it.Apple Worshipper - Thursday, May 24, 2018 - link
Errmm... does ARM feature SMT now?Ryan Smith - Thursday, May 24, 2018 - link
Not in Arm's own cores. But in Cavium's ThunderX2, yes.sgeocla - Thursday, May 24, 2018 - link
What's up with EPYC comparison missing in almost all benchmarks?EPYC has been out for a while and the only benchmarks are from almost a year ago?