Plan Max Manfrin

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History (past work)

http://iridia.ulb.ac.be/wiki/index.php/History_Max_Manfrin


Plan (future work)

Parallelization of ACO algorithms

Milestone I: Jan - Mar 2006

  • Acquire practical experience in explicit parallelization on ACO algorithms
    • Start from sequential ACOTSP and implement various MPI variants
      • Sync
        • Multicolony - completly-connected
          • each colony identifies the best bsf and grab it
          • the colony with the worst bsf grab the best bsf
        • Multicolony - ring
        • Multicolony - hypercube
        • Single colony, multi local search
      • Async
        • Multicolony - completly-connected
          • each colony identifies the best bsf and grab it
          • the colony with the worst bsf grab the best bsf
        • Multicolony - ring
        • Multicolony - hypercube
        • Single colony, multi local search
  • Paper submission to ANTS 2006 of "explicit parallelization of ACOTSP"
  • By end of March decision if and how to extend the paper for possible Journal article
  • By end of March decision if proceed with MPI version of ILK-H + ACOTSP
  • By end of March find the sentence that explain what the PhD thesis is about (what is the contribution of this thesis?)
    • 1. Parallelization of ACO on multi-core architectures ?
    • 2. Parallelization of ACO on collection of interesting problems?


Milestone II: Apr - Jun 2006

  • ? Evolve practical experience in explicit parallelization on ACO algorithms
    • ? Start from sequential ILK-H and parallelize it with MPI, calling it within parallel ACOTSP
  • Acquire practical experience in implicit parallelization on ACO algorithms
    • Start from sequential ACOTSP and implement various OpenMP variants
      • Sync ( i.e. implicit barrier in for directives)
      • Async (i.e use of the nowait clause)
  • Paper on "implicit vs explicit parallelization of ACOTSP"
  • ? Paper on "hybridization of parallel ACOTSP and ILK-H"


Milestone III: Jul - Sep 2006

  • Transfer the knowledge and experience on TSP to other problems
    • Identify possible problems for which IRIDIA has expertise and state-of-the-art ACO algo as starting points (Scheduling - Blum?)
    • Collaboration with Marco Caserta on parallel ACO for Set Covering Problem


Milestone IV: Oct - Dec 2006


Milestone V: Jan - Mar 2007


Milestone VI: Apr - Jun 2007


Milestone VII: Jul - Sep 2007

  • Write PhD thesis


Goals

  • Investigate the effect of parallelization on Ant Colony Optimization algorithms
  • Acquire practical experience in parallelization on ACO algorithms (both explicit and implicit parallelism)
  • Implicit parallelism is the new trend (multi core CPUs), not much work has been done on them yet


Things to do

Description Start date Deadline Time required status
Study OpenMP Jan 9, 2005 ongoing process In progress
Implicit parallelization of ACOTSP using OpenMP - - - Need a compiler


Weekly planning

Description Start date Deadline Completion date status Note
SEQUENTIAL ALGORITHMS
PIR (no-restart) using 16 CPUs for 3600 sec on 6 instances Mar 29 Mar 31 running
SEQ (no-restart) on 1 CPU for 57600 sec on 6 instances Apr 1 Apr 2
PIR3 (restart) using 16 CPUs for 3600 sec on 6 instances Apr 3 Apr 5
SEQ3 (restart) on 1 CPU for 57600 sec on 6 instances Apr 6 Apr 7
SYNC ALGORITHMS
1 Patch the algorithms in such a way that they use restart and communication schema (no-comm for n/2 iter and then exchange bsf every n/4 iter).
2 SRW2 (no-restart)
3 SR2 (no-restart)
4 SRW3 (restart)
5 SR3 (restart)
ASYNC ALGORITHMS
1 ACC3 Mar 1 Mar 5 done
DATA ANALYSIS Mar 12

Seminars participation

Title Author Location Dates


Events participation

Event Location Dates


Papers to write

Title Journal/Conference targeted Submission deadline
A Survey of Parallel ACO algorithms N.A. N.A.
Thread-level parallelization of ACOTSP N.A. N.A.

Referee activities

International journals

Journal # papers paper received on review to submit before


International conferences

Conference # papers paper received on review to submit before
ANTS 2006 3 March 28 Apr 23
WSC11 3-4 (estimation) May/June 2006 (estimation) 30 Jun 2006

IRIDIA chores

Chore assigned status
Update Dorigo website with Master, DEA, and PhD thesis data Feb 2, 2006
Update Dorigo website with new portoguese interview Feb 19, 2006