From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 315C245C21; Mon, 11 Nov 2024 10:25:48 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 2406F40E0C; Mon, 11 Nov 2024 10:25:48 +0100 (CET) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by mails.dpdk.org (Postfix) with ESMTP id 6932640E0C for ; Mon, 11 Nov 2024 10:25:44 +0100 (CET) Received: from mail.maildlp.com (unknown [172.19.162.254]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Xn3xL5XR6zfdFf; Mon, 11 Nov 2024 17:23:02 +0800 (CST) Received: from dggemv703-chm.china.huawei.com (unknown [10.3.19.46]) by mail.maildlp.com (Postfix) with ESMTPS id E9385180104; Mon, 11 Nov 2024 17:25:41 +0800 (CST) Received: from kwepemn100009.china.huawei.com (7.202.194.112) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Mon, 11 Nov 2024 17:25:41 +0800 Received: from localhost.localdomain (10.28.79.22) by kwepemn100009.china.huawei.com (7.202.194.112) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 11 Nov 2024 17:25:40 +0800 From: Huisong Li To: CC: , , , , , , , , , , , Subject: [RESEND PATCH v15 0/3] power: introduce PM QoS interface Date: Mon, 11 Nov 2024 17:14:35 +0800 Message-ID: <20241111091438.28659-1-lihuisong@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20240320105529.5626-1-lihuisong@huawei.com> References: <20240320105529.5626-1-lihuisong@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.28.79.22] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemn100009.china.huawei.com (7.202.194.112) X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The deeper the idle state, the lower the power consumption, but the longer the resume time. Some service are delay sensitive and very except the low resume time, like interrupt packet receiving mode. And the "/sys/devices/system/cpu/cpuX/power/pm_qos_resume_latency_us" sysfs interface is used to set and get the resume latency limit on the cpuX for userspace. Please see the description in kernel document[1]. Each cpuidle governor in Linux select which idle state to enter based on this CPU resume latency in their idle task. The per-CPU PM QoS API can be used to control this CPU's idle state selection and limit just enter the shallowest idle state to low the delay when wake up from idle state by setting strict resume latency (zero value). [1] https://www.kernel.org/doc/html/latest/admin-guide/abi-testing.html?highlight=pm_qos_resume_latency_us#abi-sys-devices-power-pm-qos-resume-latency-us --- v15: - fix conflicts due to the new merged patches that rework power lib. - add Acked-by: Konstantin Ananyev for patch 3/3. v14: - use parse_uint to parse --cpu-resume-latency instead of adding a new parse_int() v13: - not allow negative value for --cpu-resume-latency. - restore to the original value as Konstantin suggested. v12: - add Acked-by Chengwen and Konstantin - fix overflow issue in l3fwd-power when parse command line - add a command parameter to set CPU resume latency v11: - operate the cpu id the lcore mapped by the new function power_get_lcore_mapped_cpu_id(). v10: - replace LINE_MAX with a custom macro and fix two typos. v9: - move new feature description from release_24_07.rst to release_24_11.rst. v8: - update the latest code to resolve CI warning v7: - remove a dead code rte_lcore_is_enabled in patch[2/2] v6: - update release_24_07.rst based on dpdk repo to resolve CI warning. v5: - use LINE_MAX to replace BUFSIZ, and use snprintf to replace sprintf. v4: - fix some comments basd on Stephen - add stdint.h include - add Acked-by Morten Brørup v3: - add RTE_POWER_xxx prefix for some macro in header - add the check for lcore_id with rte_lcore_is_enabled v2: - use PM QoS on CPU wide to replace the one on system wide Huisong Li (3): power: introduce PM QoS API on CPU wide examples/l3fwd-power: fix data overflow when parse command line examples/l3fwd-power: add PM QoS configuration doc/guides/prog_guide/power_man.rst | 19 +++ doc/guides/rel_notes/release_24_11.rst | 5 + .../sample_app_ug/l3_forward_power_man.rst | 5 +- examples/l3fwd-power/main.c | 96 +++++++++++--- lib/power/meson.build | 2 + lib/power/rte_power_qos.c | 123 ++++++++++++++++++ lib/power/rte_power_qos.h | 73 +++++++++++ lib/power/version.map | 4 + 8 files changed, 306 insertions(+), 21 deletions(-) create mode 100644 lib/power/rte_power_qos.c create mode 100644 lib/power/rte_power_qos.h -- 2.22.0