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Tue, 14 Dec 2021 07:57:31 +0000 From: "xuyang2018.jy@fujitsu.com" To: LTP List Thread-Topic: The problem of compression ratio calculation in zram01 Thread-Index: AQHX8MA/OhNzXqTr8EmrpNfMxZ3vLg== Date: Tue, 14 Dec 2021 07:57:31 +0000 Message-ID: <61B84E9B.2080306@fujitsu.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=fujitsu.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 7a8d2f21-2bce-4323-1846-08d9bed761bc x-ms-traffictypediagnostic: TYCPR01MB5805:EE_ x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; 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; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Hi Before ltp commit 4372f7a2156 ("Fix compression ratio calculation in zram01")[1], we used free -m changes to calculate the compression ratio. After this patch, we used compr_data_size to calculate. kernel documentation[2] has the following info: orig_data_size: uncompressed size of data stored in this disk. compr_data_size: compressed size of data stored in this disk mem_used_total: the amount of memory allocated for this disk IMO, this patch changes old test's purpose and we should use mem_used_total field instead of compr_data_size(orig_data_size and compr_data_size should be dynamic adjusted by system, so using it in here is meaningless). ps: If I understand wrong, please correct me. [1]https://github.com/linux-test-project/ltp/commit/4372f7a215633e55f423dc09ec50650c142dca77 [2]https://www.kernel.org/doc/html/v5.3/admin-guide/blockdev/zram.html Best Regards Yang Xu -- Mailing list info: https://lists.linux.it/listinfo/ltp