Platform Comptence Center Report
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1 Platform Comptence Center Report CERN openlab Major Review Feb 2014 Paweł Szostek, CERN openlab On behalf of G.Bitzes, S.Jarp, P.Karpinski, A.Nowak, A.Santogidis, P.Szostek, L. Valsan
2 Outline Manpower status ICE-DIP Research and technical activities Teaching and workshops Conferences, visits, interactions Future plans Pawel Szostek - CERN openlab 2
3 Manpower status Arrivals Aram Santogidis ICE-DIP Fellow (Oct) Przemyslaw Karpinski ICE-DIP Fellow (Nov) Departures Przemyslaw Karpinski studies at NUIM in Ireland and 18-month secondment at the Intel Exascale Labs in Paris Pawel Szostek - CERN openlab 3
4 ICE-DIP 5 Early Stage Researchers recruited and hired at CERN 1 in PH-ESE 1 in PH-LBC 1 in PH-ADT 2 in IT-CF (openlab-pcc) 2/5 completed University courses 4/5 went to ISOTDAQ 2014 Blog started Secondments starting this season Santa Clara, Munich, Gdansk, Swindon, Paris Tight budget & visa issues Looking forward to H2020 Pawel Szostek - CERN openlab 4
5 ICE-DIP Pawel Szostek - CERN openlab 5
6 Research and technical activities (1) Benchmarks - we fully revised and updated our benchmark base, in collaboration with PH Reduced-size, efficient MLFit (w/ Vincenzo Innocente) Multi-threaded Geant4 (production-like variant w/ Andrea Dotti) Production version released and reported on at the Concurrency Forum Track Fitter (w/ Klaus-Dieter Oertel Intel) Pawel Szostek - CERN openlab 6
7 Research and technical activities (2) Compilers and tools Intel tools now stable after repeated license problems Performance tuning Work on a custom profiler continues Further performance tuning packages made available (Linux kernel addons unexplained 30% improvement on ATLAS code) Follow-ups concerning region based monitoring (after the GSoC project) Intel Xeon Phi benchmarking STREAM and micro-benchmarks Pawel Szostek - CERN openlab 7
8 Research and technical activities (3) Python code for ELF file analysis Pythonic fast address to source line mapping Pythonic symbol to offset mapping Static assembly code analysis Python bindings for Intel s XED + pyelftools integration + extra logic import xed, elf, disass e = elf.elffile(./test_elf") hw_text = e.get_symbol_text('_zn6c14helloworldev') hw_insts = disass.disassemble_x64(hw_text) bb = disass.get_basic_block(e, 0x81c Very rich experience with SWIG Pawel Szostek - CERN openlab 8
9 Research and technical activities (4) New Ivy Bridge-EX 4 Socket machine benchmarking supercomputer in 4U chassis Requires outside-the-box approach Architectural details and results still under NDA Pawel Szostek - CERN openlab 9
10 Research and technical activities (5) Geant-V collaboration Participation in the Geant-V project aim is to build a high-performance simulation toolkit, exploiting the capabilities of modern hardware Multi-threaded and vectorized Initial geometry navigation on a toy detector achieves 4x speedup compared to ROOT version Plots by courtesy of Sandro Wenzel Pawel Szostek - CERN openlab 10
11 Research and technical activities (6) Power consumption studies RAPL counters inside the CPU provide a way to measure its power consumption Comparing the total power consumption of a system and only the CPU s what kind of relationship is there? How does the workload affect power consumption? Results are preliminary - work is ongoing Pawel Szostek - CERN openlab 11
12 Research and technical activities (7) Power consumption studies Pawel Szostek - CERN openlab 12
13 Research and technical activities (8) Perf overhead studies Profiling methods: counting, sampling, PEBS, LBR Varying periods of sampling, number of events, number of cores Multiple benchmarks taken from SPEC, ROOT and Geant4 Very rarely the overhead goes over 25%, for counting mode principally negligible A report is ready Pawel Szostek - CERN openlab 13
14 Percentage overhead Research and technical activities (9) Perf overhead studies (sampling) Events Instances Pawel Szostek - CERN openlab 14
15 Research and technical activities (10) On-going preparations for ARM64 A system to appear in 1H2014 Study of instruction set done Vectors are similar in size to SSE Few details yet about micro-architecture (latency of math functions, etc.) Multiple compilers will be tested, in particular gcc and LLVM Plan to compare to latest Atom (Avoton) servers Pawel Szostek - CERN openlab 15
16 Workshops and teaching (1) Parallelism, Compilers and Performance workshop 6-8 November 2013 ~35 participants Speakers from CERN and Intel 2nd CERN Advanced Performance Tuning Workshop November 2013 ~50 participants World-class speakers from ARM, Calxeda, CERN, Google, Intel, Versailles Exascale Computing lab Spawned numerous follow-on activities throughout autumn and winter, as well as improvements in CERN code Pawel Szostek - CERN openlab 16
17 Workshops and teaching (2) Involvement in the icsc 2014 (Feb 24-25) 2nd Thematic CERN School of Computing coming up in June 2014 Limited, highly qualified audience 1 week long, single topic focus Pawel Szostek - CERN openlab 17
18 Conferences and talks ISC Big Data Sep 2014 S. Jarp in Programme Chair CHEP 13, Amsterdam Oct 2013 Does the Intel Xeon Phi processor fit HEP workloads? (A. Nowak) Beyond core count: a look at new mainstream computing platforms for HEP workloads (P. Szostek) Atlas Software Week 24 Oct 2013 An update on software for parallelism and heterogeneity (A. Nowak) SC13, Denver Nov 2013 S. Jarp attending, good sessions with key people from Intel ICE-DIP lectures (Jan 2014) Introduction to trigger and data acquisition (N. Neufeld / LHCb) DAQ implementation and practice (P. Vande Vyvre / ALICE) Offline computing at CERN (A. Nowak) Pawel Szostek - CERN openlab 18
19 Visits and interaction Jeff Arnold, Intel Stanislav Bratanov, Intel Andres S. Charif-Rubial, Versailles Exascale Computing lab Michael Chynoweth, Intel Maria Dimakopoulou, Google Stephane Eranian, Google Al Grant, ARM Hans Pabst, Intel Robert Richter, Calxeda Marie-Christine Sawley, Intel Avinash Sodani, Intel Karl Solsenbach, Intel Mike Williams, ARM Ahmad Yasin, Intel Georg Zitzlsberger, Intel Major Polish media visit Pawel Szostek - CERN openlab 19
20 Future work next three to six months Looking forward to 2S Haswell systems and Avoton servers Workshop and training period Two workshops in planning Two schools in planning The ICE-DIP technical program moves to Intel Releasing a profiling tool Additional projects with Intel Planning openlab V What are the future challenges? Will projects be predominantly mono-partner or multi-partner? Contracts for all of us end around H Pawel Szostek - CERN openlab 20
21 Q & A Further questions? pawel.szostek@cern.ch Pawel Szostek - CERN openlab 21
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