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
Disable the queues on the nodes r21, r24, r26, r27, r29, r31, r32, r33 Mar 29 done
Generate 2 instances with portgen (pgua3162.tsp, pgub3162.tsp) and 2 instances with portcgen (pgca3162.tsp, pgcb3162.tsp) done
Solve the generated instances to optimum with concorde Mar 29 Mar 31 done pgua3162.tsp --> 50121985
pgub3162.tsp --> 47500868
pgca3162.tsp --> 18547858
pgcb3162.tsp --> 21884136
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).
SEQUENTIAL ALGORITHMS
PIR (no-restart) using 16 CPUs for 3600 sec on 6 instances Mar 29 Mar 31 Apr 3 done
SEQ (no-restart) on 1 CPU for 57600 sec on 6 instances Apr 4 Apr 10 running
SEQ3 (restart) on 1 CPU for 57600 sec on 6 instances Apr 4 Apr 10 running
PIR3 (restart) using 16 CPUs for 3600 sec on 6 instances Mar 31 Apr 3 Apr 4 done
SYNC ALGORITHMS
SRW2 (no-restart) using 16 CPUs for 3600 sec on 6 instances Apr 11 Apr 13
SR2 (no-restart) using 16 CPUs for 3600 sec on 6 instances Apr 14 Apr 16
SRW3 (restart) using 16 CPUs for 3600 sec on 6 instances Apr 17 Apr 19
SR3 (restart) using 16 CPUs for 3600 sec on 6 instances Apr 20 Apr 22
ASYNC ALGORITHMS
ACC3 (restart) using 16 CPUs for 3600 sec on 6 instances Apr 23 Apr 25

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 working on it
Update Dorigo website with new portoguese interview Feb 19, 2006