Status of the CP-PACS project

Iwasaki, Y.

doi:10.1016/s0920-5632(96)00840-7

Cited by 11 publications

(9 citation statements)

References 2 publications

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“…This effort has been made possible by the CP-PACS computer, a massively parallel system with a peak speed of 614Gflops developed at the University of Tsukuba [4]. For preliminary reports of this work, see Ref.…”

mentioning

confidence: 99%

“…The coefficient C 1/2 , which is proportional to δ, represents the quenched singular term. Encouraged by the results for the PS mesons, we attempt to fit our mass data to (4). Fully constraining the large number of coupling parameters (6 for vector mesons and 11 for baryons in addition to δ and α Φ ) is difficult under the limitation of the accuracy of our mass data.…”

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confidence: 99%

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Quenched Light Hadron Spectrum

et al. 2000

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We present results of a large-scale simulation for the flavor non-singlet light hadron spectrum in quenched lattice QCD with the Wilson quark action. Hadron masses are calculated at four values of lattice spacing in the range a ≈ 0.1 -0.05 fm on lattices with a physical extent of 3 fm at five quark masses corresponding to m π /m ρ ≈ 0.75 -0.4. The calculated spectrum in the continuum limit shows a systematic deviation from experiment, though the magnitude of deviation is contained within 11%. Results for decay constants and light quark masses are also reported.

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confidence: 99%

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confidence: 99%

Quenched Light Hadron Spectrum

et al. 2000

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“…Multiple attempts have been made to design and build chips and computers specific to the QCD application domain that make a stab at improving the per-processor performance. Examples include digital signal processor based machines (QCDSP) [4], quantum chromodynamics on chip (QCDOC) [4], the CP-PACS computer [10], and the APE family of parallel computers [1]. With recent advances in more generalpurpose parallel processors, such as dual-and quad-core CPUs, the Cell Broadband Engine ™ (Cell/B.E.…”

Section: Introductionmentioning

confidence: 99%

The Bottom-Up Implementation of One MILC Lattice QCD Application on the Cell Blade

Shi

Kindratenko

Gottlieb

2009

Int J Parallel Prog

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We report the results of the bottom-up implementation of one MILC lattice quantum chromodynamics (QCD) application on the Cell Broadband Engine ™ processor. In our implementation, we preserve MILC's framework for scaling the application to run on a large number of compute nodes and accelerate computationally intensive kernels on the Cell's synergistic processor elements. Speedups of 3.4× for the 8 × 8 × 16 × 16 lattice and 5.7× for the 16 × 16 × 16 × 16 lattice are obtained when comparing our implementation of the MILC application executed on a 3.2 GHz Cell processor to the standard MILC code executed on a quad-core 2.33 GHz Intel Xeon processor. We provide an empirical model to predict application performance for a given lattice size. We also show that performance of the compute-intensive part of the application on the Cell processor is limited by the bandwidth between main memory and the Cell's synergistic processor elements, whereas performance of the application's parallel execution framework is limited by the bandwidth between main memory and the Cell's power processor element.

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“…Measures of efficiency include CPU utilization, cost and power consumption. Examples of purpose built computers include digital signal processor based machines (QCDSP) [1], quantum chromodynamics on chip (QCDOC) [1], the CP-PACS computer [2], and the APE family of parallel computers [3]. With recent advances in more general-purpose parallel processors, such as dual-and quad-core CPUs, the Cell Broadband Engine™ (Cell/B.E.…”

Section: Introductionmentioning

confidence: 99%

Cell processor implementation of a MILC lattice QCD application

Shi¹,

Kindratenko²,

Gottlieb³

2009

Proceedings of the XXVI International Symposium on Lattice Field Theory — PoS(LATTICE 2008)

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We present results of the implementation of one MILC lattice QCD application-simulation with dynamical clover fermions using the hybrid-molecular dynamics R algorithm-on the Cell Broadband Engine processor. Fifty-four individual computational kernels responsible for 98.8% of the overall execution time were ported to the Cell's Synergistic Processing Elements (SPEs). The remaining application framework, including MPI-based distributed code execution, was left to the Cell's PowerPC processor. We observe that we only infrequently achieve more than 10 GFLOPS with any of the kernels, which is just over 4% of the Cell's peak performance. At the same time, many of the kernels are sustaining a bandwidth close to 20 GB/s, which is 78% of the Cell's peak. This indicates that the application performance is limited by the bandwidth between the main memory and the SPEs. In spite of this limitation, speedups of 8.7× (for 8×8×16×16 lattice) and 9.6× (for 16×16×16×16 lattice) were achieved when comparing a 3.2 GHz Cell processor to a single core of a 2.33 GHz Intel Xeon processor. When comparing the code scaled up to execute on a dual-Cell blade and a quad-core dual-chip Intel Xeon blade, the speedups are 1.5× (8×8×16×16 lattice) and 4.1× (16×16×16×16 lattice).

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Status of the CP-PACS project

Cited by 11 publications

References 2 publications

Quenched Light Hadron Spectrum

Quenched Light Hadron Spectrum

The Bottom-Up Implementation of One MILC Lattice QCD Application on the Cell Blade

Cell processor implementation of a MILC lattice QCD application

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