./configure -pdt=<dir> -gpi=<dir> 
make install

setenv TAU_MAKEFILE <taudir>/x86_64/lib/Makefile.tau-gpi-pdt
set path=(<taudir>/x86_64/bin $path)
make 
./gatherscatter.x 
cp gatherscatter.x <gpidir>/apps
salloc -N 4 
squeue
(see the first compute node)
ssh compute_node_1
cd <gpidir>/apps
./gatherscatter.x
pprof
paraprof
