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[Anandtech] Intel Xeon 5570: Smashing SAP records (scoop!)

post #1 of 5
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Quote:
We have emphasized it more than once: the Nehalem architecture is all about regaining the performance crown in servers and HPC, desktop and mobile use were sometimes a bonus, sometimes an afterthought. Today it becomes almost painfully obvious. Just read Anand's thoughts about the Core i7:

"The Core i7's general purpose performance is solid, you're looking at a 5 - 10% increase in general application performance at the same clock speeds as Penryn"
and now look at the graph below.



Intel has apparantely allowed HP and Fujitsu-Siemens to break the NDA on the Xeon 5570 processor for PR reasons as both companies have published SAP numbers on a Dual Xeon 5570. The Xeon 5570 is based on the same architecture as the Core i7. It is a 2.93 GHz quadcore CPU with 4 times a 256 KB L2-cache and one huge shared 8 MB L3.



The SAP numbers are absolutely astonishing, as Intel's dual socket is able to outperform quad socket opteron machines. Based on the scaling of Barcelona, we speculate that a quad Shanghai at 2.7 GHz would obtain the performance of the Dual Xeon 5570 w/o HT.The new Xeon 5570 outperforms the "old" 5450 by 119%!!!


These numbers are so high, that we checked and checked again. The database used is the same (SQL Server 2005), so unless there is some incredible tuning parameter that HP and FS have discovered and that we have yet to hear about, that is not it.


At this point we have no idea how it is possible that a 3 GHz Nehalem outperforms the latest Opteron by a margin as high as 80% and more. But we can give it a try. In a previous server oriented article, we summed up a rough profile of SAP S&D:

• Very parallel resulting in excellent scaling
• Low to medium IPC, mostly due to “branchy†code
• Not really limited by memory bandwidth
• Likes large caches
• Sensitive to Sync (“cache coherencyâ€) latency

One of the biggest bottlenecks for Intel has been the sync latency. It is possible that once the "sync" bottleneck was removed, the intel architecture is able to show it's real integer crunching power thanks to the out of order loads (memory disambiguation) and better branch prediction.Those are two areas where the opteron architecture is still weak.


The slightly lower latency of the L3-cache of Nehalem helps too. This kind of software also makes the buffers fill up due to the long dependency chains. Those OOO buffers have been increased and the depencency chains have been shortened by a very low latency L2 cache and relatively fast L3.


Still we are absolutely amazed that the difference is this large. We would have expected Nehalem to outperform Shanghai by lower margins. Although we still are a bit skeptical that the difference is this large ("too good to be true" syndrome), we do not see how you could artificially inflate a SAP benchmark. It sure is not as easy as SPECJBB or SPECfp/int.


Update (a few hours later): It seems that the SAP page was wrong about HT. It reported 8 threads on 8 cores on the Fujitsu Siemens Primergy Server. The certification page says otherwise: 16 threads on 8 cores. So hyperthreading (SMT) plays probably an important role in this benchmark as the SAP application has very low IPC and is very parallel. So this completely annihilating performance comes from combining a wide superscalar CPU with an excellent Simultaneous Multithreading implementation. Heads off to the Intel engineers...
source

Wow. Those are insane numbers! Two quad-core chips performs similiar to four 6-core chips!!! I can't even imagine what the performance would be like with quad octo-core Nehalem Xeons....
    
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post #2 of 5
I will upgrade when the x58 Skulltrail comes out so i can have two of these.....
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post #3 of 5
any news on a release date? I'm actually about to begin designing a half-million dollar application/database setup, and it would be wonderful to have these as an option. We pay for software licenses by the processor, so this would be HUGE- for example, on the database boxes, instead of paying $25000 x8 opty chips for SQL server enterprise and $3000 x8 for windows datacenter ($224k in software alone) we could spend $6k x4 for sql standard (only supports up to 4 processors) and $3k x4 for windows- that's around $175k savings!


please please please please be released in the next month!!!!!!!
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post #4 of 5
Quote:
Originally Posted by markatto View Post
any news on a release date? I'm actually about to begin designing a half-million dollar application/database setup, and it would be wonderful to have these as an option. We pay for software licenses by the processor, so this would be HUGE- for example, on the database boxes, instead of paying $25000 x8 opty chips for SQL server enterprise and $3000 x8 for windows datacenter ($224k in software alone) we could spend $6k x4 for sql standard (only supports up to 4 processors) and $3k x4 for windows- that's around $175k savings!


please please please please be released in the next month!!!!!!!
no they won't be because the dual socket 1366 boards won't be released until late Q1, i think.
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post #5 of 5
But... can... it... play...

Solitaire? I kid, I meant crysis.

Oh wait, that was a joke too. Damn now I'm just confused. But OT, the performance looks good, and they look like solid results.

edit: damn, I always forget to spell 'crysis' as is and not 'crisis'
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