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Fri, 10 Feb 2023 14:34:03 +0000 From: Michael Adler To: isar-users@googlegroups.com Cc: Michael Adler Subject: [PATCH v3] feat: add zstd support to image conversions Date: Fri, 10 Feb 2023 15:33:26 +0100 Message-Id: <20230210143326.267033-1-michael.adler@siemens.com> X-Mailer: git-send-email 2.39.1 X-ClientProxiedBy: ZR0P278CA0110.CHEP278.PROD.OUTLOOK.COM (2603:10a6:910:20::7) To PAXPR10MB4734.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:102:12e::15) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR10MB4734:EE_|DU0PR10MB5849:EE_ X-MS-Office365-Filtering-Correlation-Id: 32b28041-c9cb-46f7-9b4d-08db0b73db57 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PAXPR10MB4734.EURPRD10.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230025)(4636009)(376002)(396003)(136003)(39860400002)(366004)(346002)(451199018)(478600001)(6666004)(8676002)(107886003)(82960400001)(36756003)(6486002)(4326008)(1076003)(6506007)(316002)(966005)(66946007)(86362001)(66556008)(26005)(66476007)(6512007)(6916009)(186003)(38100700002)(44832011)(83380400001)(2906002)(8936002)(5660300002)(41300700001)(2616005);DIR:OUT;SFP:1101; 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dkim=pass header.i=@siemens.com header.s=selector2 header.b=gBy04pvL; arc=pass (i=1 spf=pass spfdomain=siemens.com dkim=pass dkdomain=siemens.com dmarc=pass fromdomain=siemens.com); spf=pass (google.com: domain of michael.adler@siemens.com designates 2a01:111:f400:fe0c::621 as permitted sender) smtp.mailfrom=michael.adler@siemens.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=siemens.com Precedence: list Mailing-list: list isar-users@googlegroups.com; contact isar-users+owners@googlegroups.com List-ID: X-Spam-Checked-In-Group: isar-users@googlegroups.com X-Google-Group-Id: 914930254986 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_MSPIKE_H2,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on shymkent.ilbers.de X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= This patch enables ISAR to build zstd-compressed images. ISAR already supports building xz-compressed images but there are several key differences between the two that may make one more suitable than the other, depending on the specific use case: 1. Compression speed: zstd is generally faster than xz when it comes to both compression and decompression times. 2. Compression ratio: "zstd and xz trade blows in their compression ratio. Recompressing all [ArchLinux] packages to zstd with our options yields a total ~0.8% increase in package size on all of our packages combined, but the decompression time for all packages saw a ~1300% speedup." [1] 3. Memory usage: zstd uses a smaller amount of memory compared to xz. [1] https://archlinux.org/news/now-using-zstandard-instead-of-xz-for-package-compression/ Signed-off-by: Michael Adler --- meta/classes/imagetypes.bbclass | 5 ++++- meta/conf/bitbake.conf | 3 +++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/meta/classes/imagetypes.bbclass b/meta/classes/imagetypes.bbclass index 0cff440..c2033fd 100644 --- a/meta/classes/imagetypes.bbclass +++ b/meta/classes/imagetypes.bbclass @@ -93,10 +93,13 @@ IMAGE_CMD:ubi() { IMAGE_CMD:ubi[depends] = "${PN}:do_transform_template" # image conversions -IMAGE_CONVERSIONS = "gz xz" +IMAGE_CONVERSIONS = "gz xz zst" CONVERSION_CMD:gz = "${SUDO_CHROOT} sh -c 'gzip -f -9 -n -c --rsyncable ${IMAGE_FILE_CHROOT} > ${IMAGE_FILE_CHROOT}.gz'" CONVERSION_DEPS:gz = "gzip" CONVERSION_CMD:xz = "${SUDO_CHROOT} sh -c 'xz -c ${XZ_OPTIONS} ${IMAGE_FILE_CHROOT} > ${IMAGE_FILE_CHROOT}.xz'" CONVERSION_DEPS:xz = "xz-utils" + +CONVERSION_CMD:zst = "${SUDO_CHROOT} sh -c 'zstd -c ${ZSTD_DEFAULTS} ${IMAGE_FILE_CHROOT} > ${IMAGE_FILE_CHROOT}.zst'" +CONVERSION_DEPS:zst = "zstd" diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf index 522241a..c9f52a8 100644 --- a/meta/conf/bitbake.conf +++ b/meta/conf/bitbake.conf @@ -140,6 +140,9 @@ XZ_DEFAULTS[vardepsexclude] += "XZ_MEMLIMIT XZ_THREADS" # Default parallelism for zstd ZSTD_THREADS ?= "${@oe.utils.cpu_count(at_least=2)}" ZSTD_THREADS[vardepvalue] = "1" +ZSTD_LEVEL ?= "19" +ZSTD_DEFAULTS ?= "-${ZSTD_LEVEL} --threads=${ZSTD_THREADS}" +ZSTD_DEFAULTS[vardepsexclude] += "ZSTD_LEVEL ZSTD_THREADS" BBINCLUDELOGS ??= "yes"