From a3bfaa191958c4b70d6c674f972c3b911f8b1bfa Mon Sep 17 00:00:00 2001 From: Vratislav Podzimek Date: Wed, 13 Nov 2013 13:20:39 +0100 Subject: [PATCH] Run 'xz' and 'lzma' with multiple threads This speeds up compression a lot on multicore systems. https://bugzilla.redhat.com/show_bug.cgi?id=1029786 [Edited-by: Harald Hoyer: use getconf for cpu_count] --- dracut.sh | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/dracut.sh b/dracut.sh index 03472ba..bce2662 100755 --- a/dracut.sh +++ b/dracut.sh @@ -693,12 +693,14 @@ stdloglvl=$((stdloglvl + verbosity_mod_l)) # eliminate IFS hackery when messing with fw_dir fw_dir=${fw_dir//:/ } +cpu_count=$(getconf _NPROCESSORS_ONLN) + # handle compression options. [[ $compress ]] || compress="gzip" case $compress in bzip2) compress="bzip2 -9";; - lzma) compress="lzma -9";; - xz) compress="xz --check=crc32 --lzma2=dict=1MiB";; + lzma) compress="lzma -9 ${cpu_count:+-T$cpu_count}";; + xz) compress="xz --check=crc32 --lzma2=dict=1MiB ${cpu_count:+-T$cpu_count}";; gzip) compress="gzip -9"; command -v pigz > /dev/null 2>&1 && compress="pigz -9";; lzo) compress="lzop -9";; lz4) compress="lz4 -9";;