Introduction to Parallel Processing

1
Introduction to Parallel Processing

• Lecture 5
• 18/6/2008
• Dr. Guy Tel-Zur

2
Topics

• Torque
• The new Top500 list ???? ?????
• Pipelined Computations
• Synchronous Computations
• MPE profiling and graphics.
• PVM - A short introduction and Dynamic Process
  Creation
• Final Projects

3
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4
Start using Torque

• PBS Tutorial

vdwarf2.ee.bgu.ac.ilgt more ./cpi.pbs
!/bin/bash PBS -N cpi PBS -q default PBS
-l nodes4ppn1 echo Start printing echo The
working directory is echo PBS_O_WORKDIR cd
PBS_O_WORKDIR /usr/local/bin/mpirun -np 4
-machinefile ./machinefile ./cpi
5
PBS
vdwarf2.ee.bgu.ac.ilgt qsub ./cpi.pbs
30.vdwarf1.ee.bgu.ac.il
vdwarf2.ee.bgu.ac.ilgt qstat Job id
Name User Time Use S
Queue ------------------------- ----------------
--------------- -------- - ----- 30.vdwarf1
cpi tel-zur
000000 C batch
6
PBS
vdwarf2.ee.bgu.ac.ilgt more ./cpi.o30 Warning no
access to tty (Bad file descriptor). Thus no job
control in this shell. Start printing The
working directory is /users/agnon/misc/tel-zur/mpi
pi is approximately 3.1416009869231249, Error is
0.0000083333333318 wall clock time
0.010767 vdwarf2.ee.bgu.ac.ilgt
7
The New Top500 list ???? ?????

• http//www.top500.org
• ISC08 Dresden
• The list will be released on 18/6, so luckily we
  will have a look at it during the class.

8
PP Performance Evaluation

• Lets analyze the following example
• http//riebecca.blogspot.com/2007/12/supercomputin
  g-course-example.html

9
PVM
10
PVM