M-series roadmap

Article: HP Wins Oracle Lawsuit
By: Michael S (already5chosen.delete@this.yahoo.com), August 7, 2012 2:24 am
Room: Moderated Discussions
EduardoS (no.delete@this.spam.com) on August 7, 2012 1:54 am wrote:
> Michael S (already5chosen.delete@this.yahoo.com) on August 7, 2012 1:34 am
> wrote:
> > SPARC-T4
> > derivative with 1.5x single thread performance of
> Sparc64 VII+?
> > Indeed, Sparc64
> > VII+ single-thread performance sucks,
> but does it suck THAT much?
>
> UltraSPARC T4 is a OoO processor with a few very
> strong points in single-thread performance like the load/store unit, if
> "derivate" means giving T4 single-thread more resources to play with it won't be
> difficult for this chip to beat Sparc64 VII+, specially in the memory-intensive
> targeted workload.

Still, isn't SPARC T4 a 2-way superscalar with very long integer pipeline, small L1 caches (L1D write through? I can't find info about that), very small private L2 cache and small shared L3 cache?
Yes, for throughput SPARC T4 3-level cache hierarchy is immensely better than 2-level hierarchy of Sparc64, but for single-thread performance relatively low L2 throughput of Sparc64 is not so critical. On the other hand, for the single-thread (and for scalability to high number of sockets, but that's off topic) you want as big LLC as you can afford and that's where Sparc64 is miles ahead.

So, narrower than Sparc64, longer pipeline, throughput-oriented cache hierarchy... And suspicious absence of SpecInt submissions.


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TopicPosted ByDate
Article: HP Likely to Win Lawsuit vs. HPDavid Kanter2012/08/01 12:02 PM
  Article: HP Likely to Win Lawsuit vs. HPJoel2012/08/01 12:27 PM
    Article: HP Likely to Win Lawsuit vs. HPAlberto2012/08/01 12:50 PM
    HP-UX goes to Xeonmpx2012/08/01 11:20 PM
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        Project OdysseyPaul A. Clayton2012/08/02 04:20 AM
          Project OdysseyRicardo B2012/08/02 05:31 AM
            Project Odysseysomeone2012/08/02 06:38 AM
              Project Odysseyrwessel2012/08/02 06:54 AM
                Project OdysseyRicardo B2012/08/02 07:08 AM
                  Project OdysseyMichael S2012/08/02 08:15 AM
                    Project Odysseyrwessel2012/08/02 09:43 AM
  Article: HP Likely to Win Lawsuit vs. Oraclempx2012/08/01 01:37 PM
    Article: HP Likely to Win Lawsuit vs. OracleMark Roulo2012/08/01 02:08 PM
      Article: HP Likely to Win Lawsuit vs. Oraclempx2012/08/02 01:01 AM
        Do you have a reference for the HP/Oracle agreement?Mark Roulo2012/08/02 06:36 AM
          "quality of support" MS2012/08/02 09:44 AM
            "quality of support" mpx2012/08/03 10:53 AM
        Article: HP Likely to Win Lawsuit vs. Oraclempx2012/08/02 08:06 AM
        Article: HP Likely to Win Lawsuit vs. OracleAnonymouse2012/08/04 09:55 PM
          Thank you for finding that! (NT)David Kanter2012/08/05 01:20 AM
            Thank you for finding that!mpx2012/08/05 03:58 AM
    Article: HP Likely to Win Lawsuit vs. OracleDavid Kanter2012/08/01 02:30 PM
      Article: HP Likely to Win Lawsuit vs. Oraclempx2012/08/01 11:01 PM
        Article: HP Likely to Win Lawsuit vs. OracleAnonymouse2012/08/04 10:01 PM
          Article: HP Likely to Win Lawsuit vs. Oraclempx2012/08/05 03:56 AM
            Do you work for Oracle?David Kanter2012/08/05 09:28 AM
              Do you work for Oracle?mpx2012/08/05 01:00 PM
                What you missedGroo2012/08/06 10:22 AM
                  What you missedmpx2012/08/08 11:26 AM
                    What you missedGroo2012/08/08 01:59 PM
  Article: HP Likely to Win Lawsuit vs. HPdefderdar2012/08/01 01:52 PM
    Article: HP Likely to Win Lawsuit vs. HPMark Roulo2012/08/01 02:10 PM
    Article: HP Likely to Win Lawsuit vs. HPmpx2012/08/01 10:19 PM
      Article: HP Likely to Win Lawsuit vs. HPKira2012/08/05 01:26 PM
        Article: HP Likely to Win Lawsuit vs. HPMichael S2012/08/05 01:55 PM
          Article: HP Likely to Win Lawsuit vs. HPDavid Kanter2012/08/05 02:49 PM
            Article: HP Likely to Win Lawsuit vs. HPKira2012/08/05 04:46 PM
            Article: HP Likely to Win Lawsuit vs. HPMichael S2012/08/06 12:02 AM
              Article: HP Likely to Win Lawsuit vs. HPKira2012/08/06 12:25 AM
                Article: HP Likely to Win Lawsuit vs. HPMichael S2012/08/06 12:42 AM
                  Article: HP Likely to Win Lawsuit vs. HPKira2012/08/06 12:46 AM
                    Article: HP Likely to Win Lawsuit vs. HPblaine2012/08/06 11:33 AM
                      Article: HP Likely to Win Lawsuit vs. HPKira2012/08/06 01:36 PM
          Article: HP Likely to Win Lawsuit vs. HPKira2012/08/05 04:45 PM
            Article: HP Likely to Win Lawsuit vs. HPMichael S2012/08/06 12:33 AM
              Article: HP Likely to Win Lawsuit vs. HPKira2012/08/06 12:44 AM
                Article: HP Likely to Win Lawsuit vs. HPMichael S2012/08/06 01:07 AM
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          Article: HP Likely to Win Lawsuit vs. HPmpx2012/08/05 11:54 PM
            M-series roadmapMichael S2012/08/06 02:16 AM
              M-series roadmapmpx2012/08/06 11:01 PM
                M-series roadmapMichael S2012/08/07 12:34 AM
                  M-series roadmapEduardoS2012/08/07 12:54 AM
                    M-series roadmapMichael S2012/08/07 02:24 AM
                      M-series roadmapEduardoS2012/08/07 03:57 AM
                        M-series roadmapMichael S2012/08/07 01:17 PM
    Like not doing profiling? (NT)Megol2012/08/02 06:11 AM
  Oracle's actions a boon to FLOSS?Win Lawsuit vs. HPPaul A. Clayton2012/08/01 02:18 PM
    Oracle's actions a boon to FLOSS?Win Lawsuit vs. HPJoel2012/08/01 03:43 PM
      Oracle's actions a boon to FLOSS?Win Lawsuit vs. HPDavid Kanter2012/08/01 04:53 PM
      I meant in generalPaul A. Clayton2012/08/01 06:02 PM
        I meant in generalEric2012/08/02 11:55 AM
          Spirit of the agreementblaine2012/08/03 06:45 AM
            Spirit of the agreementGroo2012/08/03 08:09 AM
  OEL?Kira2012/08/01 02:44 PM
    OEL?David Kanter2012/08/01 04:50 PM
      OEL?Ricardo B2012/08/02 05:16 AM
    OEL?Kevin G2012/08/01 06:08 PM
      OEL?Steve Underwood2012/08/02 07:34 PM
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