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HEPMARK2

HEPMARK2. Consiglio di Sezione 9 Luglio 2012 Michele Michelotto - Padova. Why. INFN procurements for Millions of Euro of Worker Node / year Simulation and Recostruction of HEP events (mainly offline, so High Troughput Computing) How to get the best price/performance

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HEPMARK2

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  1. HEPMARK2 Consiglio di Sezione 9 Luglio 2012 Michele Michelotto - Padova

  2. Why • INFN procurements for Millions of Euro of Worker Node / year • Simulation and Recostruction of HEP events (mainly offline, so High Troughput Computing) • How to get the best price/performance • How to measure the performance

  3. Benchmark • CERN UNIT, VUPS, MIPS, MHz! • We have about 18000 GHz of CPU ? • Synthetic Benchmark • SPEC INT 95 • HLT paper model (1996-2000) • SPEC INT 2000 • Computing TDRs (2000-2005)

  4. Different usage of SI2K • From 2000 to 2006 the default was SPEC CPU INT 2000, (a.k.a. SI2K) used in several ways • Taking data of one cpu from SPEC site • Multiply by the number of cpu in your site • Speed or Rate • Measuring SI2K on real machines with our compiler (gcc) and the default set of optimization switches

  5. CMS sw SIM and Pythia • CMS Montecarlo simulation (32bit) and Pythia (64bit) show the same performance once normalized • Both Specint 2006 pubblished and Specint 2006 with gcc show the same behaviour • SI2K pubblished does not match HEP sw • SI2K measured by CERN better but not as good as SI2006

  6. Working group in • CERN, INFN, GridKa, Desy, RAL, Univ of Victoria • + Esperts from CMS, ATLAS, ALICE, LHCB • HEP SPEC 06 • Based not only on INT but also on FP • The same ratio of PF as the job running on lxbatch • Validated against the HEP simulation and reconstruction code

  7. Validation by • Working group by WLCG • HEP SPEC 06 accepted as reference benchmark in HEP and GRID farm • Pledges are now expressed in HS06 • T0, T1, T2 measured in HS06

  8. HEP SPEC 06 paper

  9. What we need • At least one Worker node for each new family of processor • One from Intel, one from AMD • Always available. Impossibile on make measurements on evaluations machine • Need to rerun on old machines

  10. Milestone 1 • SPEC has released in September the version 1.2 of the CPU suite • The score should not change for CPU INT, FP and hence for our HEP SPEC 06 • Need to rerun on all HEPMARK machines

  11. Milestone 2 • HEP SPEC 06 at 64 bit • Experiments finally moved to full 64bit/64bit • HEP SPEC 06 still on 32 bit • HEPIX group addressed this issue in the last meeting. • We stay with 32 bit since the improvment from 32 to 64 is similar in all processors

  12. New AMD processor • 2 x 8 Bulldozer core • Each Bulldozer core has 2 int scheduler • 32 x-86 core

  13. Many integrated core • In contact with G.Maron (LNL) to start exploring the “manycore” processors (MIC) • Mainly in the CNAF area of interest:

  14. Backup slides

  15. 5520 32 bit - HT ON/OFF HT ON:81.81HT OFF: 95.96HT OFF is better up to 11concurrent run michele michelotto - INFN Padova 18

  16. 5520(2266) vs 2427(2200) michele michelotto - INFN Padova 19

  17. Speed vs Rate

  18. Gcc (gridka) vs SPEC site

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