By: Henrik S (henrik.stahl.delete@this.oracle.nospam.nothanks.com), November 9, 2008 11:52 pm
Room: Moderated Discussions
Michael S (already5chosen@yahoo.com) on 11/9/08 wrote:
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>EduardoS (no@spam.com) on 11/9/08 wrote:
>---------------------------
>>Joe Chang (jchang6@Xyahoo.com) on 11/9/08 wrote:
>>---------------------------
>>>Inquirer points out the SPEC Power results posted by AMD for Shanghai and Penryn (Xeon L5420) both at 2.5GHz.
>>>AMD results for Shanghai is 731 versus 561 for Xeon.
>>>SPEC Power results posted by others for the L5420 were higher, the SuperMicro results
>>>being 990, but not as close a system match as the 2 AMD results (Windows instead of Linux, and BEA vs Oracle).
BEA == Oracle. They bought us (BEA) earlier this year, so Oracle now owns the JRockit technology.
That said, there are significant differences in JVM versions from all vendors (BEA/Oracle, IBM, Sun) so you must interpret results where the vendor or version varies with care.
>replacing the 8x2GB for 4x4GB modules costs $202, for the LP versions it's
>>$442 in HP web site, both are reasonable prices in my opinion but I would go for
>>8x4GB instead of saving a few Watts with DIMMs.
The 2 GB DIMMs are slightly faster. I've been told that it's due to the fact that they have lower latency.
>>But they give a preview of Shangai's performance on SpecJBB 2005, 338,577 isn't bad at all.
>>
>
>Is the performance test used in SpecPower identical to regular Jbb2005? 338,577
>sounds a bit too good to believe. The best official Barcelona score on BEA JVM=219,269.
>338,557 is even a bit higher than 2x3.33 QC Penryn on IBM JVM.
SPECPower and SPECjbb are very similar, but not identical, workloads. We have Shanghai hardware, and what I've seen so far is quite impressive, so there's no reason to question this result.
-- Henrik (Oracle JRockit team)
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>EduardoS (no@spam.com) on 11/9/08 wrote:
>---------------------------
>>Joe Chang (jchang6@Xyahoo.com) on 11/9/08 wrote:
>>---------------------------
>>>Inquirer points out the SPEC Power results posted by AMD for Shanghai and Penryn (Xeon L5420) both at 2.5GHz.
>>>AMD results for Shanghai is 731 versus 561 for Xeon.
>>>SPEC Power results posted by others for the L5420 were higher, the SuperMicro results
>>>being 990, but not as close a system match as the 2 AMD results (Windows instead of Linux, and BEA vs Oracle).
BEA == Oracle. They bought us (BEA) earlier this year, so Oracle now owns the JRockit technology.
That said, there are significant differences in JVM versions from all vendors (BEA/Oracle, IBM, Sun) so you must interpret results where the vendor or version varies with care.
>replacing the 8x2GB for 4x4GB modules costs $202, for the LP versions it's
>>$442 in HP web site, both are reasonable prices in my opinion but I would go for
>>8x4GB instead of saving a few Watts with DIMMs.
The 2 GB DIMMs are slightly faster. I've been told that it's due to the fact that they have lower latency.
>>But they give a preview of Shangai's performance on SpecJBB 2005, 338,577 isn't bad at all.
>>
>
>Is the performance test used in SpecPower identical to regular Jbb2005? 338,577
>sounds a bit too good to believe. The best official Barcelona score on BEA JVM=219,269.
>338,557 is even a bit higher than 2x3.33 QC Penryn on IBM JVM.
SPECPower and SPECjbb are very similar, but not identical, workloads. We have Shanghai hardware, and what I've seen so far is quite impressive, so there's no reason to question this result.
-- Henrik (Oracle JRockit team)
