The OpenSees Community

hi,
for parametric study with OpenSeesMP if I want to take advantage of more than one core on my machine, each one has 8 processors, do I need any additional commands than those on example from the documentation for OpenSees parallel that follows?

set pid [getPID]
set np [getNP]
set recordsFileID [open "peerRecords.txt" r]
set count 0;
foreach gMotion [split [read $recordsFileID] \n] {
if {[expr $count % $np] == $pid} {
source model.tcl
source analysis.tcl
set ok [doGravity] loadConst -time 0.0
set gMotionList [split $gMotion "/"]
set gMotionDir [lindex $gMotionList end-1]
set gMotionNameInclAT2 [lindex $gMotionList end]
set gMotionName [string range $gMotionNameInclAT2 0 end-4 ]
set Gaccel "PeerDatabase $gMotionDir $gMotionName -accel 384.4 -dT dT -nPts nPts" pattern UniformExcitation 2 1 -accel $Gaccel

recorder EnvelopeNode -file $gMotionDir$gMotionName.out -node 3 4 -dof 1 2 3 disp
doDynamic [expr $dT*$nPts] $dT
if {$ok == 0} {
puts "$gMotionDir $gMotionName OK"
} else {
puts "$gMotionDir $gMotionName FAILED"
} wipe }
incr count 1;
}

If yes can somebody give me an example.
I run my model on 24 processors but take the same time as if it was running on 8.

you need no additional commands .. you just have to start it correctly .. look at the -machinefile
option that comes with mpi

thanks for the quick answer Dr. McKenna.
I don't get though why the examples from the handouts http://opensees.berkeley.edu/OpenSees/w ... de0003.htm
are working for single core machines but when I am trying to run them on a double core machine or on our cluster I get the following message:
child killed: unknown signal.

you have an mpi problem that you need to solve

Hi,

I am trying the same example. But got theerror
establishHTTPConnection - could not connect
httpGet: failed to establis connection
PeerMotion::PeerMotion() - could not connect to PEER Database

i have enabled internet connection for the peer database site ..

Can you please tell me that wether more settings need o be done.
I have allready posted same on message board.

Thanks
Gouri

i don't know what the problem that you are having is .. for now, i suggest you download the motions directly to your local machine and then modify the script to
run all the motions in a directory.

Following is the original code which tries to connect to datat base

set Gaccel "PeerDatabase $gMotionDir $gMotionName -accel 384.4 -dT dT -nPts nPts"
pattern UniformExcitation 2 1 -accel $Gaccel

what will be the changed code which will take previously downloaded files.

create a time series simlar to the one in this example

http://opensees.berkeley.edu/wiki/index ... e_Analysis

Thanks, I had the same question.