Free calls software for linux

Pretendroot is an LD_PRELOAD library which overrides some glibc calls, pretending you are root while doing file system operations.

The main difference from Debians fakeroot is that no daemons or other processes are involved, fake ownership and group are stored on the file system, and not in memory, hence it can survive even reboots.

pretendroot library has been successfully used when building packages for the UHU-Linux distribution. All of its applications are compiled and installed as an unprivileged user.

However, theres no need to patch Makefiles; commands such as "install -o root -g mail thisfile ${DESTDIR}/here" work perfectly, and the final packages will have the desired ownership and group.

PDL::Parallel::MPI Perl module contains routines to allow PDL objects to be moved around on parallel systems using the MPI library.

SYNOPSIS

use PDL;
use PDL::Parallel::MPI;
mpirun(2);

MPI_Init();
$rank = get_rank();
$a=$rank * ones(2);
print "my rank is $rank and $a is $an";
$a->move( 1 => 0);
print "my rank is $rank and $a is $an";
MPI_Finalize();

MPI STANDARD CALLS

Most of the functions from the MPI standard may be used from this module on regular perl data. This is functionallity inherited from the Parallel::MPI module. Read the documentation for Parallel::MPI to see how to use.

One may mix mpi calls on perl built-in-datatypes and mpi calls on piddles.

use PDL;
use PDL::Parallel::MPI;
mpirun(2);

MPI_Init();
$rank = get_rank();
$pi = 3.1;
if ($rank == 0) {
MPI_Send($pi,1,MPI_DOUBLE,1,0,MPI_COMM_WORLD);
} else {
$message = zeroes(1);
$message->receive(0);
print "pi is $messagen";
}
MPI_Finalize();

Python Call Graph (pycallgraph) is a Python library that creates call graphs for Python programs

pycallgraph is quite new. It seems to work well and I will most likely improve it in the near future!