9f7f1a167a
* Wed Sep 09 2020 Fedora Kernel Team <kernel-team@fedoraproject.org> [5.9.0-0.rc4.20200909git34d4ddd359db.5] - Merge ark-patches Resolves: rhbz# Signed-off-by: Justin M. Forbes <jforbes@fedoraproject.org>
27 lines
733 B
Bash
Executable File
27 lines
733 B
Bash
Executable File
#!/bin/sh
|
|
# Reads filenames on stdin, xz-compresses each in place.
|
|
# Not optimal for "compress relatively few, large files" scenario!
|
|
|
|
# How many xz's to run in parallel:
|
|
procgroup=""
|
|
while test "$#" != 0; do
|
|
# Get it from -jNUM
|
|
N="${1#-j}"
|
|
if test "$N" = "$1"; then
|
|
# Not -j<something> - warn and ignore
|
|
echo "parallel_xz: warning: unrecognized argument: '$1'"
|
|
else
|
|
procgroup="$N"
|
|
fi
|
|
shift
|
|
done
|
|
|
|
# If told to use only one cpu:
|
|
test "$procgroup" || exec xargs -r xz
|
|
test "$procgroup" = 1 && exec xargs -r xz
|
|
|
|
# xz has some startup cost. If files are really small,
|
|
# this cost might be significant. To combat this,
|
|
# process several files (in sequence) by each xz process via -n 16:
|
|
exec xargs -r -n 16 -P "$procgroup" xz
|