HMLQCD
From HP-SEE Wiki
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== Development Plan == | == Development Plan == | ||
| - | * Concept: '' | + | * Concept: ''The concept was done before the project started'' |
| - | * Start of alpha stage: ''.'' | + | * Start of alpha stage: ''M01. Construction of an algorithm. Creating of the program.'' |
| - | * Start of beta stage: ''.'' | + | * Start of beta stage: ''M6. Parallelization and Debugging of the application.'' |
| - | * Start of testing stage: ''.'' | + | * Start of testing stage: ''M8. Testing on multiprocessor platforms.'' |
| - | * Start of deployment stage: ''.'' | + | * Start of deployment stage: ''M10. Performing calculations.'' |
* Start of production stage: ''.'' | * Start of production stage: ''.'' | ||
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* Storage space during a single run: 1-500GB | * Storage space during a single run: 1-500GB | ||
* Long-term data storage: 1TB | * Long-term data storage: 1TB | ||
| - | * Total core hours required: '' | + | * Total core hours required: ''2 000 000 hour'' |
== Technical Features and HP-SEE Implementation == | == Technical Features and HP-SEE Implementation == | ||
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* Home system: ''.'' | * Home system: ''.'' | ||
| - | ** Applied for access on: ''.'' | + | ** Applied for access on: ''09.2010'' |
| - | ** Access granted on: ''.'' | + | ** Access granted on: ''10.2010'' |
| - | ** Achieved scalability: '' | + | ** Achieved scalability: ''512 cores'' |
* Accessed production systems: | * Accessed production systems: | ||
# ''.'' | # ''.'' | ||
| - | #* Applied for access on: ''.'' | + | #* Applied for access on: ''10.2010'' |
| - | #* Access granted on: ''.'' | + | #* Access granted on: ''10.2010'' |
#* Achieved scalability: ''.'' | #* Achieved scalability: ''.'' | ||
* Porting activities: ''.'' | * Porting activities: ''.'' | ||
Revision as of 17:31, 26 March 2012
General Information
- Application's name: Hadron Masses from Lattice QCD
- Application's acronym: HMLQCD
- Virtual Research Community: Computational Physics
- Scientific contact: Artan Boriçi
- Technical contact: Dafina Xhako, dafinaxhako@yahoo.com, Rudina Zeqirllari, rudina_mj@hotmail.com
- Developers: MSc. Dafina Xhako, MSc.Rudina Zeqirllari, Department of Physics,Faculty of Natural Science, University of Tirana, Albania
- Web site: http://wiki.hp-see.eu/index.php/HMLQCD
Short Description
Lattice Quantum Chromodynamics (QCD) is the theory of strong interactions defined on four dimensional space-time hypercubic lattice. Its correlation functions are given by expectation values over path integrals. At present, the only direct tool to compute such integrals is the Markov Chain Monte Carlo method, which gives large autocorrelation times for certain observables. At any Markov step several huge and sparse linear systems have to be solved. Hence, the whole procedure results in a very expensive computational problem especially as the continuum limit is approached. The mass spectrum analysis involves computation of quark propagators, which are the solutions of huge linear systems of Dirac operators defined on the lattice. In order to converge, a typical Krylov subspace solver needs several hundreds or even thousands of multiplications by the lattice Dirac operator. The project idea is computation of basic properties of matter simulating the theory of strong interactions, Quantum Chromodynamic on the Lattice on massively parallel computers.
Our project aims to test for the first time local chiral actions for the calculation of the hadron masses. On the algorithmic side the project will test new solvers for overlap and domain wall fermions.
Problems Solved
Lattice QCD has become an indispensable tool both for particle and nuclear physics. The problems solved by the project are:
- Hadron spectrum computation
- Decay constants and comparison with chiral perturbation theory
Scientific and Social Impact
Solution of QCD has not been yet achieved. Our lattice study would like to complement other studies at different parameters and different lattice actions. Usage of local chiral fermions saves two orders of magnitude of computing resources. It gives physical results with unprecedented accuracy close to the chiral limit. Increased social support for scientific communities.
Collaborations
- TIRLatt (Tirana lattice QCD group)
- CaSToRC Institute, Cyprus, Greece
Beneficiaries
Main beneficiaries are research groups in Computational Physics. International lattice groups may benefit from expanded libraries of QCDLAB and of fermiQCD.
Number of users
2
Development Plan
- Concept: The concept was done before the project started
- Start of alpha stage: M01. Construction of an algorithm. Creating of the program.
- Start of beta stage: M6. Parallelization and Debugging of the application.
- Start of testing stage: M8. Testing on multiprocessor platforms.
- Start of deployment stage: M10. Performing calculations.
- Start of production stage: .
Resource Requirements
- Number of cores required: Limited to available number of CPUs
- Minimum RAM/core required: 1GB
- Storage space during a single run: 1-500GB
- Long-term data storage: 1TB
- Total core hours required: 2 000 000 hour
Technical Features and HP-SEE Implementation
- Primary programming language: C/C++
- Parallel programming paradigm: MPI/Open MP
- Main parallel code: MPI
- Pre/post processing code: Own developer
- Application tools and libraries: FermiQCD, OpenMP
Usage Example
Infrastructure Usage
- Home system: .
- Applied for access on: 09.2010
- Access granted on: 10.2010
- Achieved scalability: 512 cores
- Accessed production systems:
- .
- Applied for access on: 10.2010
- Access granted on: 10.2010
- Achieved scalability: .
- Porting activities: .
- Scalability studies: .
Running on Several HP-SEE Centres
- Benchmarking activities and results: .
- Other issues: .
