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Test con MPIch-G2 Roberto Alfieri, Fabio Spataro WP1 meeting 20 Novembre 2000 Gruppo Collegato di Parma.

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Presentation on theme: "Test con MPIch-G2 Roberto Alfieri, Fabio Spataro WP1 meeting 20 Novembre 2000 Gruppo Collegato di Parma."— Presentation transcript:

1 Test con MPIch-G2 Roberto Alfieri, Fabio Spataro WP1 meeting 20 Novembre 2000 Gruppo Collegato di Parma

2 The installation: - 7nov2000: GIIS server HW: dual PII 350, 256 MB (globus.pr.infn.it) SW: RedHat6.2, InfnGrid nov2000: test-MPIcluster named janus HW: 2 dual PII 350, 256 MB (janus.pr.infn.it, janus1.pr.infn.it) SW: RedHat6.2, InfnGrid 1.1.2, mpich-1.2.1, mpich-(G2)1.2.1 Parma

3 MPICH-G2: install and configure mpich = compile dist with configure –device=ch_p4 (default) mpich-G = compile dist with configure –device=nexus (obsolete) mpich-G2 = compile dist with configure –device=globus2 Globus2 vs. nexus: Increase bandwidth, reduced latency intramachine, increased latency intermachine, more efficient use of sockets RedHat Powertools contains mpich rpm We built mpich rpm and mpich-G rpm (ftp://ftp.fis.unipr.it./pub/linux/rpm/contrib/) Parma

4 TESTS PLAN WHAT: - Point-to-point communication performance using mpptest (mpich distribution) - Collective communication performance using goptest (mpich distribution) - Custom applications performance (Neural Networks,..) WHERE: -LAN distributed PC-cluster (PR) -WAN distributed PC-cluster (PR+MI2) Parma

5 RETE_MPI BENCH Neural Network training using 1 node: 356 sec Neural Network training using 4 nodes: 83 sec Neural Network training using 2 nodes: - MPICH-G2 (janus,janus) -> 172 sec - MPICH-G2 (janus,janus1) -> 165 sec - MPICH (janus,janus) -> 172 sec - MPICH (janus,janus1) -> 165 sec Parma

6 Point-to-point Latency (mpirun -np 2 mpptest -reps 10 -sizelist 0,1) 0 byte 1 byte - MPICH-G2 (janus,janus) -> 120 usec, 190 usec (roundtrip) - MPICH-G2 (janus,janus) -> 80 usec, 170 usec (head to head) - MPICH-G2 (janus,janus1) -> 210 usec, 280 usec (roundtrip) - MPICH-G2 (janus,janus1) -> 100 usec, 170 usec (head to head) - MPICH (janus,janus) -> 150 usec, 155 usec (roundtrip) - MPICH (janus,janus) -> 120 usec, 125 usec (head to head) - MPICH (janus,janus1) -> 215 usec, 225 usec (roundtrip) - MPICH (janus,janus1) -> 120 usec, 125 usec (head to head) Parma

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