NAME

cpumax - Run as many commands as there are CPUs

SYNOPSIS

cpumax [OPTIONS]

cpumax reads command lines from STDIN, and runs as many in parallel as there are available CPUs.

DESCRIPTION

maxcpu reads command lines from STDIN, and executes as many in parallel as there are detected CPUs.

To portably detect how many CPUs are available, the POSIX system call ``sysconf'' is available. Unfortunately, Perl's POSIX module doesn't include the constant required for CPU detection (_SC_NPROCESSORS_ONLN). As a result, maxcpu uses Inline::C to execute the detection function.

OPTIONS

-c, --cpus=NUM: Override the number of detected CPUs.
-d, --debug: Turns on process debugging.
-v, --verbose: Reports commands as they are executed.
-h, --help: Shows help documentation.
-V, --version: Reports version

EXAMPLE

To execute CPU-intensive tasks in parallel, a list of tasks can be created by the shell and fed into maxcpu:

        (for i in *.jpg; do
                echo convert -geometry 640x480 -quality 70 $i $i
        done) | maxcpu

AUTHOR

 Kees Cook, <kees@outflux.net>