AMD's 3rd generation Opteron versus Intel's 45nm Xeon: a closer look
by Johan De Gelas on November 27, 2007 6:00 AM EST- Posted in
- IT Computing
64-bit MySQL (Linux 64-bit)
MySQL has released version 5.1.22, which supposedly can scale up to eight CPU cores. That would be a huge improvement considering that all versions earlier than 5.0.37 could only make good use of two CPU cores. In our experience, this new binary scales well up to four cores, but eight cores are easily 20% slower than four core systems. Thus, we tested with a maximum of four cores.
Please note that these results cannot be compared with our earlier MySQL results. MySQL v5.1.22 is a completely different binary than v5.0.2x we tested previously. Although it still doesn't scale beyond four cores, it is up to 70% (!!) faster than v5.0.26 that came standard with our SLES 10 SP1. For smaller servers with four cores, MySQL is once again an ultra fast database.
Moreover, the third generation of Opterons absolutely loves this new MySQL version. At 2.5GHz, it is just as fast (the margin of error is up to 4%) as the mighty Xeon 5472 at 3GHz. As we failed to profile MySQL in depth (CodeAnalyst for Linux still has some quirks), we cannot pinpoint the exact reason why the Opteron 23xx is so good at this. The MySQL database is mostly limited by synchronizing the locks, so we suspect that the slightly faster cache coherency syncing on the Opteron 23xx might be one of the reasons AMD's latest performs so well.
WinRAR 3.62 (Windows 32-bit)
WinRAR 3.62 is a completely different kind of workload.
| WinRAR 3.62 Profiling | |
| Profile | Total |
| Average IPC (on AMD 2350) | 0.36 |
| Instruction mix | |
| Floating Point | 0% |
| SSE | 0% |
| Branches | 9% |
| L1 datacache ratio | 1.13 |
| L1 I cache ratio | 0.35 |
| Performance indicators (on Opteron 2350) | |
| Branch misprediction | 7% |
| L1 datacache miss | 4% |
| L1 Instruction cache miss | 0% |
| L2 cache miss | 3% |
Notice that contrary to the other workloads we have profiled so far, WinRAR does not run perfectly in the L1 or L2 cache. Second, notice the huge amount of loads that happen: more than one per retired instruction.
The massive bandwidth that Barcelona can offer multi-threaded software pays off here. You can also see that the Seaburg chipset improves the score of the 3GHz quad-core Xeon by 7%.
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Hans Maulwurf - Wednesday, November 28, 2007 - link
Agreed, I have not seen an article as good as this one for years at Anandtech. And not for some time on other review sites as well.Thank you.
JohanAnandtech - Tuesday, November 27, 2007 - link
Thanks people. This kind of articles take ridiculously amounts of time and I really appreciate that you let me know that you liked the article. It keeps us going. (and I mean that!)magreen - Tuesday, November 27, 2007 - link
Excellent article, thorough and with amazing depth and expertise. Keep up the great work AT!Bluestealth - Tuesday, November 27, 2007 - link
I agree, it was a very well done article. I can't wait to see how Intel's processors preform on Hyper... errr... Common System Interface (next year?). I believe that I will be buying AMD until that happens though for any servers.Regs - Tuesday, November 27, 2007 - link
Yeah, every time I see "Johan De Gelas" I have to read it.I like the added info on the Barc's L3 cache and the intro-factoid about the new architecture.
I agree that the Barc's arrival is a year late and joined the party a little too shy. Integer performance will likely have to be addressed in the Bulldozer in 2-3 years. Which is 2-3 years too long. I would be really surprised if they can manage anything other than a die shrink for Shanghi with maybe more L3 cache and some tweaks for cache latency and SSE.
Just seems like AMD took a nose dive in development for their processors in the past 3-4 years. After the K8 I would think they would be able to come up with something more innovative. Revolutionary should of never entered their heads and they should actually look down upon themselves for using such a word after 4 years.
jones377 - Tuesday, November 27, 2007 - link
Any chance you could use the same tools to profile desktop applications as well in the future?DigitalFreak - Tuesday, November 27, 2007 - link
Three months or so since "launch", and you still can't get a server with AMD quad-core chips from any of the big 3 vendors (HP, Dell, IBM). AMD really screwed the pooch on this one.jojo4u - Tuesday, November 27, 2007 - link
Yuck, ugly GIF on the first page. Please use PNG because 256 colors are not enough for screenshots ;)deathwombat - Saturday, December 1, 2007 - link
In addition to being less ugly, PNG's higher compression would also make the file smaller (using less bandwidth), which I assume is what they were going for.jkostans - Tuesday, November 27, 2007 - link
Didn't even notice.