From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 0005037B4 for ; Mon, 25 Sep 2017 14:38:00 +0200 (CEST) Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Sep 2017 05:38:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,436,1500966000"; d="scan'208";a="153019113" Received: from silpixa00397898.ir.intel.com (HELO silpixa00397898.ger.corp.intel.com) ([10.237.223.116]) by orsmga005.jf.intel.com with ESMTP; 25 Sep 2017 05:37:58 -0700 From: David Hunt To: dev@dpdk.org Cc: konstantin.ananyev@intel.com, jingjing.wu@intel.com Date: Mon, 25 Sep 2017 13:27:01 +0100 Message-Id: <1506342429-199695-1-git-send-email-david.hunt@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1503676941-80981-1-git-send-email-david.hunt@intel.com> References: <1503676941-80981-1-git-send-email-david.hunt@intel.com> Subject: [dpdk-dev] [PATCH v2] Policy Based Power Control for Guest X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Sep 2017 12:38:01 -0000 Policy Based Power Control for Guest This patchset adds the facility for a guest VM to send a policy down to the host that will allow the host to scale up/down cpu frequencies depending on the policy criteria independently of the DPDK app running in the guest. This differs from the previous vm_power implementation where individual scale up/down requests were send from the guest to the host via virtio-serial. V2 patchet changes: * Removed API's in ethdev layer. * Now just a single new API in the i40e driver for mapping VF MAC to VF index. * Moved new function from rte_rxtx.c to rte_pmd_i40e.c * Removed function for reading i40e register, moved to using the standard stats API. * Renamed i40e function to rte_pmd_i40e_query_vfid_by_mac * Cleaned up policy generation code. It's a modification of the vm_power_manager app that runs in the host, and the guest_vm_power_app example app that runs in the guest. This allows the guest to send down a policy to the host via virtio-serial, which then allows the host to scale up/down based on the criteria in the policy, resulting in quicker scale up/down than individual requests coming from the guest. It also means that the DPDK application running in the guest does not need to be modified in any way, it is unaware that it's cores are being scaled up/down, reducing the effort in implementing a power-aware infrastructure. The usage model is as follows: 1. Set up the VF's and assign to the guest in the usual way. 2. run vm_power_manager on the host, creating a channel to the guest. 3. Start the guest_vm_power_mgr app on the guest, which establishes a virtio-serial channel to the host. 4. Send down the profile for the guest using the "send_profile now" command. There is an example profile hard-coded into guest_vm_power_mgr. 5. Stop the guest_vm_power_mgr and run your normal power-unaware application. 6. Send traffic into the VFs at varying traffic rates. Observe the frequency change on the host (turbostat -i 1) The sequence of code changes are as follows: A new function has been aded to the i40e driver to allow mapping of a VF MAC to VF index. Next we make an addition to librte_power that adds an extra command to allow the passing of a policy structure from the guest to the host. This struct contains information like busy/quiet hour, packet throughput thresholds, etc. The next addition adds functionality to convert the virtual CPU (vcpU0 IDs to physical CPU (pcpu) IDs so that the host can scale up/down the cores used in the guest. The remaining patches are functionality to process the policy, and take action when the relevant trigger occurs to cause a frequency change. [1/8] net/i40e: add API to convert VF MAC to VSI index [2/8] lib/librte_power: add extra msg type for policies [3/8] examples/vm_power_mgr: add vcpu to pcpu mapping [4/8] examples/vm_power_mgr: add scale to medium freq fn [5/8] examples/vm_power_mgr: add policy to channels [6/8] examples/vm_power_mgr: add port initialisation [7/8] examples/guest_cli: add send policy to host [8/8] examples/vm_power_mgr: set MAC address of VF