POWER7 Spec

By: Jamie Lucier (me.delete@this.myisp.com), February 17, 2010 10:41 am
Room: Moderated Discussions
Jesper Frimann (jesperfrimann@gmail.com) on 2/16/10 wrote:
---------------------------

>I think it is a typo in the DL380 report. On page 3
>"10,000 employees were processed in this test. Table 2 shows the processing time in minuts."
>And then the table says 250.000 employees. It's a typo.

Agree, it's likely a typo...they appear to have cut & paste the typo into the second copy of the table in the same document. Crappy auditing.

>I don't agree. You can't just say that the numbers that doesn't suit you are suspicious. That is not fair.
>And with regards to the notes about extrapolations then it comes from the fact
>that benchmark version's of V1.1 and higher has that disclaimer' the 1.0 which is
>the DL380 hasn't. Quite simple. Both benchmarks uses the same method for reporting.

First off, it's not that the numbers don't suit me. I don't work for either of these vendors nor any reseller. I work with both POWER and XEON platforms. I'm just trying to objectively point out and share my opinion that this benchmark seems weak and the comparison has some limitations.

Looking at the results it's questionable that for every workload in the benchmark the Nehalem EP is doing fairly well, in fact beats the POWER7. Only in two of the six workloads does the POWER beat the Xeon in this comparison. Again though, this comparison is already bad because we're comparing a two socket solution versus a single socket solution. One server is doing socket to socket I/O, the other isn't. One server has SMT enable, the other doesn't. One server has ~30% more RAM than the other. One server has six cores, the other has eight. One CPU has 3 times more L3 cache than the other. on and on and on. I do get though that these differences are inevitable when comparing different platforms though and cannot necessarily be avoided.

>
>Now what is the difference here is that the systems have a focus on making different
>parts of the benchmark run fast. That is the real difference.
>And that isn't any different from a SPEC or TPC-C benchmark.

Agreed. Plus ca change, plus c'est le meme chose. I'm not the first to point out the distrust in a particular benchmark nor do I expect to be the last.

>
>So I fail to see any foul play here, besides all the tuning parameters I can't
>understand why isn't set. Specially on the AIX, where I used to do a lot of system tuning quite a few years ago.

I don't think I said foul play, rather I'm just suspicious of the results particularly how they apply to relative to the upcoming Nehalem EX.
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TopicPosted ByDate
POWER7 SpecParadox2010/02/08 11:05 AM
  POWER7 SpecThu Nguyen2010/02/08 12:58 PM
    POWER7 SpecIan Ameline2010/02/08 09:22 PM
      POWER7 SpecThu Nguyen2010/02/08 11:54 PM
        POWER7 SpecIan Ameline2010/02/09 06:46 AM
          POWER7 SpecLinus Torvalds2010/02/09 07:57 AM
            industry-standard single-threaded performance benchmarks absentMichael S2010/02/09 08:09 AM
              industry-standard single-threaded performance benchmarks absentParadox2010/02/09 08:33 AM
                industry-standard single-threaded performance benchmarks absentMichael S2010/02/09 09:30 AM
                  industry-standard single-threaded performance benchmarks absentParadox2010/02/09 10:52 AM
                    industry-standard single-threaded performance benchmarks absentJesper Frimann2010/02/09 11:33 AM
              industry-standard single-threaded performance benchmarks absentLinus Torvalds2010/02/09 08:48 AM
                industry-standard single-threaded performance benchmarks absentMichael S2010/02/09 09:26 AM
                  industry-standard single-threaded performance benchmarks absentLinus Torvalds2010/02/09 09:58 AM
                    industry-standard single-threaded performance benchmarks absentJesper Frimann2010/02/09 12:17 PM
                      industry-standard single-threaded performance benchmarks absentLinus Torvalds2010/02/09 12:54 PM
                        industry-standard single-threaded performance benchmarks absentJesper Frimann2010/02/09 02:10 PM
                    industry-standard single-threaded performance benchmarks absentParadox2010/02/09 01:22 PM
                industry-standard single-threaded performance benchmarks absentanon2010/02/09 10:21 AM
            POWER7 SpecJesper Frimann2010/02/09 12:30 PM
            POWER7 SpecDoug Siebert2010/02/09 05:38 PM
              POWER7 SpecLinus Torvalds2010/02/09 07:28 PM
                POWER7 SpecLinus Torvalds2010/02/09 07:28 PM
                  POWER7 SpecIan Ameline2010/02/09 08:02 PM
                    POWER7 SpecDoug Siebert2010/02/09 10:18 PM
                POWER7 Specsomeone2010/02/09 08:20 PM
                  POWER7 SpecLinus Torvalds2010/02/10 09:17 AM
                    POWER7 SpecLinus Torvalds2010/02/10 09:46 AM
                      POWER7 SpecEmil2010/02/10 11:06 AM
                    POWER7 SpecIan Ameline2010/02/10 10:13 AM
                    POWER7 Specsomeone2010/02/10 11:01 AM
                      POWER7 SpecLinus Torvalds2010/02/10 11:32 AM
                        POWER7 SpecMichael S2010/02/10 12:30 PM
                          POWER7 SpecLinus Torvalds2010/02/10 01:25 PM
                            POWER7 Specmpx2010/02/10 02:58 PM
                        POWER7 Specnemlis2010/02/11 12:24 AM
                          POWER7 Specnone2010/02/11 12:52 AM
                            POWER7 Specnemlis2010/02/11 01:52 PM
          POWER7 Specmpx2010/02/09 08:18 AM
          POWER7 SpecMichael S2010/02/09 09:08 AM
        POWER7 SpecJesper Frimann2010/02/16 02:29 AM
          POWER7 SpecJamie Lucier2010/02/16 06:35 AM
            POWER7 Specanon2010/02/16 07:16 AM
              POWER7 SpecJamie Lucier2010/02/16 10:46 AM
                POWER7 Specanon2010/02/16 03:42 PM
                  POWER7 SpecJamie Lucier2010/02/18 06:07 AM
              POWER7 SpecThu Nguyen2010/02/16 01:23 PM
            POWER7 SpecParadox2010/02/16 09:57 AM
              POWER7 SpecJamie Lucier2010/02/16 11:22 AM
                POWER7 SpecParadox2010/02/16 02:00 PM
            POWER7 SpecJesper Frimann2010/02/16 02:14 PM
              POWER7 SpecJamie Lucier2010/02/17 10:41 AM
  POWER7 SpecJesper Frimann2010/02/09 04:43 AM
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