ignore this one from applying yet. its still premature but if folks can test it
out would be appreciated.
> On Sep 24, 2015, at 9:59 PM, Khem Raj <raj.k...@gmail.com> wrote:
>
> pxz results in significant time saving when generating xz filetypes for
> images due to parallelization support
>
> a simple test on ubuntu build host with 16 CPUs
>
> time xz -M 50% -f -k -c -e -9 --check=crc32
> CX041AEI_PROD_default_20150610000105sdy-dbg.rootfs.cpio
> >CX041AEI_PROD_default_20150610000105sdy-dbg.rootfs.cpio.xz
>
> real
> 23m42.299s
> user 23m36.947s
> sys 0m5.101s
>
> time pxz -M 50% -f -k -c -e -9 --check=crc32
> CX041AEI_PROD_default_20150610000105sdy-dbg.rootfs.cpio
> >CX041AEI_PROD_default_20150610000105sdy-dbg.rootfs.cpio.xz
>
> real2m59.666s
> user 24m38.529s
> sys 0m10.056s
>
> Signed-off-by: Khem Raj <raj.k...@gmail.com
> ---
> meta/classes/image_types.bbclass | 4 ++--
> meta/recipes-extended/pxz/pxz_git.bb | 31 +++++++++++++++++++++++++++++++
> 2 files changed, 33 insertions(+), 2 deletions(-)
> create mode 100644 meta/recipes-extended/pxz/pxz_git.bb
>
> diff --git a/meta/classes/image_types.bbclass
> b/meta/classes/image_types.bbclass
> index 306403e..d766cd2 100644
> --- a/meta/classes/image_types.bbclass
> +++ b/meta/classes/image_types.bbclass
> @@ -233,13 +233,13 @@ COMPRESSIONTYPES = "gz bz2 lzma xz lz4 sum"
> COMPRESS_CMD_lzma = "lzma -k -f -7 ${IMAGE_NAME}.rootfs.${type}"
> COMPRESS_CMD_gz = "gzip -f -9 -c ${IMAGE_NAME}.rootfs.${type} >
> ${IMAGE_NAME}.rootfs.${type}.gz"
> COMPRESS_CMD_bz2 = "pbzip2 -f -k ${IMAGE_NAME}.rootfs.${type}"
> -COMPRESS_CMD_xz = "xz -f -k -c ${XZ_COMPRESSION_LEVEL} ${XZ_THREADS}
> --check=${XZ_INTEGRITY_CHECK} ${IMAGE_NAME}.rootfs.${type} >
> ${IMAGE_NAME}.rootfs.${type}.xz"
> +COMPRESS_CMD_xz = "pxz -f -k -c ${XZ_COMPRESSION_LEVEL} ${XZ_THREADS}
> --check=${XZ_INTEGRITY_CHECK} ${IMAGE_NAME}.rootfs.${type} >
> ${IMAGE_NAME}.rootfs.${type}.xz"
> COMPRESS_CMD_lz4 = "lz4c -9 -c ${IMAGE_NAME}.rootfs.${type} >
> ${IMAGE_NAME}.rootfs.${type}.lz4"
> COMPRESS_CMD_sum = "sumtool -i ${IMAGE_NAME}.rootfs.${type} -o
> ${IMAGE_NAME}.rootfs.${type}.sum ${JFFS2_SUM_EXTRA_ARGS}"
> COMPRESS_DEPENDS_lzma = "xz-native"
> COMPRESS_DEPENDS_gz = ""
> COMPRESS_DEPENDS_bz2 = "pbzip2-native"
> -COMPRESS_DEPENDS_xz = "xz-native"
> +COMPRESS_DEPENDS_xz = "pxz-native"
> COMPRESS_DEPENDS_lz4 = "lz4-native"
> COMPRESS_DEPENDS_sum = "mtd-utils-native"
>
> diff --git a/meta/recipes-extended/pxz/pxz_git.bb
> b/meta/recipes-extended/pxz/pxz_git.bb
> new file mode 100644
> index 0000000..fe21be6
> --- /dev/null
> +++ b/meta/recipes-extended/pxz/pxz_git.bb
> @@ -0,0 +1,31 @@
> +# Copyright (C) 2015 Khem Raj <raj.k...@gmail.com>
> +# Released under the MIT license (see COPYING.MIT for the terms)
> +
> +SUMMARY = "Parallel LZMA compressor compatible with XZ"
> +DESCRIPTION = "Parallel XZ is a compression utility that takes advantage of
> running LZMA compression of different parts of an input file on multiple
> cores and processors simultaneously. Its primary goal is to utilize all
> resources to speed up compression time with minimal possible influence on
> compression ratio"
> +HOMEPAGE = "https://jnovy.fedorapeople.org/pxz/";
> +LICENSE = "GPL-2.0+"
> +LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263"
> +SECTION = "console/utils"
> +DEPENDS = "xz"
> +
> +SRCREV = "ae808463c2950edfdedb8fb49f95006db0a18667"
> +PV = "4.999.9beta+git${SRCPV}"
> +SRC_URI = "git://github.com/jnovy/pxz.git"
> +
> +S = "${WORKDIR}/git"
> +
> +CFLAGS_append = " -fopenmp -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE"
> +LDFLAGS_append = " -llzma"
> +
> +do_compile () {
> + oe_runmake
> +}
> +
> +do_install () {
> + oe_runmake DESTDIR=${D} INSTALL="install -p"
> +}
> +
> +deltask do_configure
> +
> +BBCLASSEXTEND = "native"
> --
> 2.5.3
>
--
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