MPI-Povray Performance Report

After running all of these povray cases under the path : /home/rider/scenes (default:/opt/povray31/scenes) , i have choose 5 (*.pov)files which are the highest cpu consumption(最耗運算資源-光影相關運算)for mpi-povray to run performance test.
All of the rendered files had been put in the /home/rider/povray_demo directory.

Rendered files for the performance experiment are listed below...

/home/rider/scenes/advanced/woodbox.pov
/home/rider/objects/pawns.pov
/home/rider/scenes/advanced/whiltile.pov
/home/rider/scenes/interior/ballbox.pov
/home/rider/scenes/advanced/quilt1.pov

Experiment Case

We have 4 experiment cases:

case1: 1024 x 768
case2: 2048 x 1536
case3: 4096 x 3072
case4: 8192 x 6144

MPI-POVRAY - MPI Only

Machinefile:
#MPI Machinefile
node1:4
node2:4
node3:4
node4:4
node5:4
node6:4
node7:4
# End of Machinefile

case1.1: Resolution 1024 x 768: Running 5 *.pov continuously with np7 takes 16 secs to finish rendering
case2.1: Resolution 2048 x 1536: Running 5 *.pov continuously with np7 takes 62 secs to finish rendering
case3.1: Resolution 4096 x 3072: Running 5 *.pov continuously with np7 takes 241 secs to finish rendering
case4.1: Resolution 8192 x 6144: Running 5 *.pov continuously with np7 takes 935 secs to finish rendering

case1.2: Resolution 1024 x 768: Running 5 *.pov continuously with np14 takes 10 secs to finish rendering
case2.2: Resolution 2048 x 1536: Running 5 *.pov continuously with np14 takes 43 secs to finish rendering
case3.2: Resolution 4096 x 3072: Running 5 *.pov continuously with np14 takes 161 secs to finish rendering
case4.2: Resolution 8192 x 6144: Running 5 *.pov continuously with np14 takes 601 secs to finish rendering

case1.3: Resolution 1024 x 768: Running 5 *.pov continuously with np28 takes 13 secs to finish rendering
case2.3: Resolution 2048 x 1536: Running 5 *.pov continuously with np28 takes 50 secs to finish rendering
case3.3: Resolution 4096 x 3072: Running 5 *.pov continuously with np28 takes 185 secs to finish rendering
case4.3: Resolution 8192 x 6144: Running 5 *.pov continuously with np28 takes 695 secs to finish rendering

MPI-POVRAY - MPI + Kerrighed

#MPI+Kerrighed Machinefile
node1:4
node1:4
node1:4
node1:4
node1:4
node1:4
node1:4
# End of Machinefile

Or

#MPI+Kerrighed Machinefile
node1:28
# End of Machinefile

Result: Using this machinefile,we only get one node running povary process by 4 CPUs and the others are nothing to do.

Solution1:
Step1: rider@node101:~$ krg_capset -e +CAN_MIGRATE
Step2: rider@node101:~$ migrate pid nodeid

Failure: Running-povray process can not be divided to several threads for kerrighed to migrate.

Solution2:
When running an MPI application on Kerrighed, be sure to :
1 - You have only "localhost" in your node list file
2 - You do not create local process with mpirun ("-nolocal" option with MPICH)
3 - You have compiled MPICH with RSH_COMMAND = "'krg_rsh"
4 - Be sure the Kerrighed scheduler is loaded (modules cpu_scheduler2, etc)
5 - Be sure to enable process distant fork and use of kerrighed dynamic streams (in the terminal you launch MPI applications in, use the shell command krg_capset -d +DISTANT_FORK,USE_INTRA_CLUSTER_KERSTREAMS)

rider@node101:~$ krgcapset -d +DISTANT_FORK,USE_INTRA_CLUSTER_KERSTREAMS,CAN_MIGRATE

Reference URL:
​http://131.254.254.17/mpi.php
​http://kerrighed.org/forum/viewtopic.php?t=42

Failure: Running-povray process can not be divided to several threads for kerrighed to migrate.

@Performance Report: For the attached file: mpi-povray performance_result.odt