From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id D10C3A04DB; Fri, 4 Sep 2020 20:34:13 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 3B995E07; Fri, 4 Sep 2020 20:34:13 +0200 (CEST) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 49409255 for ; Fri, 4 Sep 2020 20:34:11 +0200 (CEST) IronPort-SDR: kN33W15CutSHFW4nCbuCD1CnRGNAJ134tu71ykpmirDkJyRlJAywE0mpynXJOjmYyeNty9Oq9o zvk2GKI0+Omg== X-IronPort-AV: E=McAfee;i="6000,8403,9734"; a="145534872" X-IronPort-AV: E=Sophos;i="5.76,391,1592895600"; d="scan'208";a="145534872" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Sep 2020 11:34:10 -0700 IronPort-SDR: Xp03pA8NkXaR+dv4mn1lsSSp46NoW4xPMTjB/6fI+wcKpILSJxg81/fNzNm1HgrEEeeC3ndP5v 0reH5HICVPIg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,391,1592895600"; d="scan'208";a="332252782" Received: from orsmsx603.amr.corp.intel.com ([10.22.229.16]) by orsmga008.jf.intel.com with ESMTP; 04 Sep 2020 11:34:10 -0700 Received: from orsmsx601.amr.corp.intel.com (10.22.229.14) by ORSMSX603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Fri, 4 Sep 2020 11:34:09 -0700 Received: from ORSEDG601.ED.cps.intel.com (10.7.248.6) by orsmsx601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5 via Frontend Transport; Fri, 4 Sep 2020 11:34:09 -0700 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (104.47.57.169) by edgegateway.intel.com (134.134.137.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.1713.5; Fri, 4 Sep 2020 11:33:54 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=EZPOH3D7vlqZbgHD+VTCpdx6Tt4C0QYlvOsZGebJCHCYRmtQqMmexMW00bUYJskCJSCXABxRDpI1IakcbW0q8Vfe4A7lhfyLiG5jOxL1MjctxmIu3tvpdxagp2rllFCAryH/H3LUChvLBie5PSA4NYr4k6MF/i3UqojjWoGbMauROOE5rRx2tQjTRrP5JWMnTM2xhyE20PauHy5BK8QPg1NzlgPHqdOfk9dxZCWhvIGg4iTrW0/9HNXpjGasA/VxmWt9yLVbckGtbONaqcmSQLQIG+1kKOiBgn/3tSBatsq2pU0zCJy4xhMQvP6sZ835ncqEXigqzxQE8PqCTGrEpg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hvFsEeJAI83HBqZ+L1gKF+sFMsB+3zETFbbWDYpuhT4=; b=UEzHv7iUhktGCABiik2IaSEjInP8h/cL/1BYlqLRnQ879trx5tUTEg0B/948+yDrBWU1/n/NbIJOcN/PZyoLH0ozskBf1pL+Q6lXC4wUtz9OiCnTa/bciEmXZePgsco8n+/VZGoj5Ie8aQQWU3uQMPnle98YTwcSukjm6Y1ogjN6nU456r+PNj25wXwA28Kj146MZQrGuDERKbsoq7U+xXLZdjq3Ee8sVgpFWj8PcB2KqW0AD0eC7Dkx5nZWE4fWkwFtDk9y7hNznCrpHEN7gJyxQ92YTt00YKVstxkUyKc5AculC5LD7Y1cUlQfxf4RdawlSHupjANeQ8yMcPngMw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel.onmicrosoft.com; s=selector2-intel-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hvFsEeJAI83HBqZ+L1gKF+sFMsB+3zETFbbWDYpuhT4=; b=GKFzJX3c2Z5t4aMyU8fTyrl/f599fsVEu1CFj5SBisKokJwyXHTs2VbZncOZfJu0+QABfI4QeWgMcD67wea2VJ/G4hD5BkdAbMniQ+Ik5XntoMWDrTX6hmsCMW0hGF27CqMDOdoRRnmRnQXpytBGMclffKOxAYuvFZW3rGEne5c= Received: from BYAPR11MB3301.namprd11.prod.outlook.com (2603:10b6:a03:7f::26) by BYAPR11MB3670.namprd11.prod.outlook.com (2603:10b6:a03:f8::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3326.23; Fri, 4 Sep 2020 18:33:02 +0000 Received: from BYAPR11MB3301.namprd11.prod.outlook.com ([fe80::f43b:a137:dab8:8b0b]) by BYAPR11MB3301.namprd11.prod.outlook.com ([fe80::f43b:a137:dab8:8b0b%6]) with mapi id 15.20.3348.015; Fri, 4 Sep 2020 18:33:02 +0000 From: "Ananyev, Konstantin" To: "Ma, Liang J" , "dev@dpdk.org" CC: "Hunt, David" , "Burakov, Anatoly" , "Ma, Liang J" Thread-Topic: [dpdk-dev] [PATCH v3 3/6] power: add simple power management API and callback Thread-Index: AQHWgqTvSMUaGmA5RkSVjaZPl0KEqqlYyA7A Date: Fri, 4 Sep 2020 18:33:01 +0000 Message-ID: References: <1597141666-20621-1-git-send-email-liang.j.ma@intel.com> <1599214740-3927-1-git-send-email-liang.j.ma@intel.com> <1599214740-3927-3-git-send-email-liang.j.ma@intel.com> In-Reply-To: <1599214740-3927-3-git-send-email-liang.j.ma@intel.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-reaction: no-action dlp-version: 11.5.1.3 authentication-results: intel.com; dkim=none (message not signed) header.d=none;intel.com; dmarc=none action=none header.from=intel.com; x-originating-ip: [46.7.39.127] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 8e0e5802-1e7f-4681-5e41-08d85100f4cb x-ms-traffictypediagnostic: BYAPR11MB3670: x-ld-processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3631; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: BtCChhL9/SQNvTXTdXjgdN2+awyZ1ae54DAff6d9vpf1lbVYAXqZfdcgzEkqOqymjvP12xtUSyaAv0BW4sQ5qquzKrO9kcsktDRILqFJzw7QQFxlkjwD+bsTKP3s0OvsRGtDXpnxZJwePe3k+P3q+ypbDj50nS6Fm3WjGB+/nIOdOo9Q8SynljDOkPfED3o4VNFKruxGUXej947aOgORy6g7LBJWMoJSodHawtOy+fXDKWV9xYQSFojpqj1k6obIB2f5mNbx2gAXOQvPhF9pbwdOGkMdqj3xUdIuYU0CPolG11+4IKN2W7WRE0JXIOtxZLYu6q+PfiptDqPvqvScyA== x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:BYAPR11MB3301.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(136003)(366004)(346002)(39860400002)(396003)(376002)(6506007)(5660300002)(107886003)(54906003)(86362001)(26005)(9686003)(71200400001)(2906002)(8936002)(52536014)(66446008)(66556008)(66476007)(66946007)(316002)(4326008)(186003)(33656002)(110136005)(55016002)(478600001)(64756008)(83380400001)(76116006)(7696005); DIR:OUT; SFP:1102; x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BYAPR11MB3301.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8e0e5802-1e7f-4681-5e41-08d85100f4cb X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Sep 2020 18:33:02.0166 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: vZI/r8rr0NNO8oqdnJ3KnkdqyUtLT0ubfoORjv0gn/LcNrQUDHmHw0vCmhyaTGWJib1NP+XxDjDYsOXZatzUM+Q1TO9UIN11rCVCjFuYQjI= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB3670 X-OriginatorOrg: intel.com Subject: Re: [dpdk-dev] [PATCH v3 3/6] power: add simple power management API and callback 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" >=20 > Add a simple on/off switch that will enable saving power when no > packets are arriving. It is based on counting the number of empty > polls and, when the number reaches a certain threshold, entering an > architecture-defined optimized power state that will either wait > until a TSC timestamp expires, or when packets arrive. >=20 > This API is limited to 1 core 1 port 1 queue use case as there is > no coordination between queues/cores in ethdev. 1 port map to multiple > core will be supported in next version. >=20 > This design leverage RX Callback mechnaism which allow three > different power management methodology co exist. >=20 > 1. umwait/umonitor: >=20 > The TSC timestamp is automatically calculated using current > link speed and RX descriptor ring size, such that the sleep > time is not longer than it would take for a NIC to fill its > entire RX descriptor ring. >=20 > 2. Pause instruction >=20 > Instead of move the core into deeper C state, this lightweight > method use Pause instruction to releaf the processor from > busy polling. >=20 > 3. Frequency Scaling > Reuse exist rte power library to scale up/down core frequency > depend on traffic volume. >=20 > Signed-off-by: Liang Ma > Signed-off-by: Anatoly Burakov > --- > lib/librte_power/meson.build | 3 +- > lib/librte_power/rte_power.h | 38 +++++ > lib/librte_power/rte_power_pmd_mgmt.c | 184 +++++++++++++++++++++++++ > lib/librte_power/rte_power_version.map | 4 + > 4 files changed, 228 insertions(+), 1 deletion(-) > create mode 100644 lib/librte_power/rte_power_pmd_mgmt.c >=20 > diff --git a/lib/librte_power/meson.build b/lib/librte_power/meson.build > index 78c031c943..44b01afce2 100644 > --- a/lib/librte_power/meson.build > +++ b/lib/librte_power/meson.build > @@ -9,6 +9,7 @@ sources =3D files('rte_power.c', 'power_acpi_cpufreq.c', > 'power_kvm_vm.c', 'guest_channel.c', > 'rte_power_empty_poll.c', > 'power_pstate_cpufreq.c', > + 'rte_power_pmd_mgmt.c', > 'power_common.c') > headers =3D files('rte_power.h','rte_power_empty_poll.h') > -deps +=3D ['timer'] > +deps +=3D ['timer' ,'ethdev'] > diff --git a/lib/librte_power/rte_power.h b/lib/librte_power/rte_power.h > index bbbde4dfb4..06d5a9984f 100644 > --- a/lib/librte_power/rte_power.h > +++ b/lib/librte_power/rte_power.h > @@ -14,6 +14,7 @@ > #include > #include > #include > +#include >=20 > #ifdef __cplusplus > extern "C" { > @@ -97,6 +98,43 @@ int rte_power_init(unsigned int lcore_id); > */ > int rte_power_exit(unsigned int lcore_id); >=20 > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior no= tice > + * > + * Enable device power management. > + * @param lcore_id > + * lcore id. > + * @param port_id > + * The port identifier of the Ethernet device. > + * @param mode > + * The power management callback function mode. > + * @return > + * 0 on success > + * <0 on error > + */ > +__rte_experimental > +int rte_power_pmd_mgmt_enable(unsigned int lcore_id, > + uint16_t port_id, > + enum rte_eth_dev_power_mgmt_cb_mode mode); > + > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior no= tice > + * > + * Disable device power management. > + * @param lcore_id > + * lcore id. > + * @param port_id > + * The port identifier of the Ethernet device. > + * > + * @return > + * 0 on success > + * <0 on error > + */ > +__rte_experimental > +int rte_power_pmd_mgmt_disable(unsigned int lcore_id, uint16_t port_id); > + > /** > * Get the available frequencies of a specific lcore. > * Function pointer definition. Review each environments > diff --git a/lib/librte_power/rte_power_pmd_mgmt.c b/lib/librte_power/rte= _power_pmd_mgmt.c > new file mode 100644 > index 0000000000..a445153ede > --- /dev/null > +++ b/lib/librte_power/rte_power_pmd_mgmt.c > @@ -0,0 +1,184 @@ > +/* SPDX-License-Identifier: BSD-3-Clause > + * Copyright(c) 2010-2020 Intel Corporation > + */ > + > +#include > +#include > +#include > +#include > +#include > + > +#include "rte_power.h" > + > + > + > +static uint16_t > +rte_power_mgmt_umwait(uint16_t port_id, uint16_t qidx, > + struct rte_mbuf **pkts __rte_unused, uint16_t nb_rx, > + uint16_t max_pkts __rte_unused, void *_ __rte_unused) > +{ > + > + struct rte_eth_dev *dev =3D &rte_eth_devices[port_id]; > + > + if (unlikely(nb_rx =3D=3D 0)) { > + dev->empty_poll_stats[qidx].num++; I believe there are two fundamental issues with that approach: 1. You put metadata specific lib (power) callbacks into rte_eth_dev struct. 2. These callbacks do access rte_eth_devices[] directly.=20 That doesn't look right to me - rte_eth_dev structure supposed to be treate= d as internal one librt_ether and underlying drivers and should be accessed d= irectly by outer code. If these callbacks need some extra metadata, then it is responsibility of power library to allocate/manage these metadata. You can pass pointer to this metadata via last parameter for rte_eth_add_rx= _callback(). > + if (unlikely(dev->empty_poll_stats[qidx].num > > + ETH_EMPTYPOLL_MAX)) { > + volatile void *target_addr; > + uint64_t expected, mask; > + uint16_t ret; > + > + /* > + * get address of next descriptor in the RX > + * ring for this queue, as well as expected > + * value and a mask. > + */ > + ret =3D (*dev->dev_ops->next_rx_desc) > + (dev->data->rx_queues[qidx], > + &target_addr, &expected, &mask); > + if (ret =3D=3D 0) > + /* -1ULL is maximum value for TSC */ > + rte_power_monitor(target_addr, > + expected, mask, > + 0, -1ULL); > + } > + } else > + dev->empty_poll_stats[qidx].num =3D 0; > + > + return nb_rx; > +} > + > +static uint16_t > +rte_power_mgmt_pause(uint16_t port_id, uint16_t qidx, > + struct rte_mbuf **pkts __rte_unused, uint16_t nb_rx, > + uint16_t max_pkts __rte_unused, void *_ __rte_unused) > +{ > + struct rte_eth_dev *dev =3D &rte_eth_devices[port_id]; > + > + int i; > + > + if (unlikely(nb_rx =3D=3D 0)) { > + > + dev->empty_poll_stats[qidx].num++; > + > + if (unlikely(dev->empty_poll_stats[qidx].num > > + ETH_EMPTYPOLL_MAX)) { > + > + for (i =3D 0; i < RTE_ETH_PAUSE_NUM; i++) > + rte_pause(); > + > + } > + } else > + dev->empty_poll_stats[qidx].num =3D 0; > + > + return nb_rx; > +} > + > +static uint16_t > +rte_power_mgmt_scalefreq(uint16_t port_id, uint16_t qidx, > + struct rte_mbuf **pkts __rte_unused, uint16_t nb_rx, > + uint16_t max_pkts __rte_unused, void *_ __rte_unused) > +{ > + struct rte_eth_dev *dev =3D &rte_eth_devices[port_id]; > + > + if (unlikely(nb_rx =3D=3D 0)) { > + dev->empty_poll_stats[qidx].num++; > + if (unlikely(dev->empty_poll_stats[qidx].num > > + ETH_EMPTYPOLL_MAX)) { > + > + /*scale down freq */ > + rte_power_freq_min(rte_lcore_id()); > + > + } > + } else { > + dev->empty_poll_stats[qidx].num =3D 0; > + /* scal up freq */ > + rte_power_freq_max(rte_lcore_id()); > + } > + > + return nb_rx; > +} > + > +int > +rte_power_pmd_mgmt_enable(unsigned int lcore_id, > + uint16_t port_id, > + enum rte_eth_dev_power_mgmt_cb_mode mode) > +{ > + struct rte_eth_dev *dev; > + > + RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL); > + dev =3D &rte_eth_devices[port_id]; > + > + if (dev->pwr_mgmt_state =3D=3D RTE_ETH_DEV_POWER_MGMT_ENABLED) > + return -EINVAL; > + /* allocate memory for empty poll stats */ > + dev->empty_poll_stats =3D rte_malloc_socket(NULL, > + sizeof(struct rte_eth_ep_stat) > + * RTE_MAX_QUEUES_PER_PORT, > + 0, dev->data->numa_node); > + if (dev->empty_poll_stats =3D=3D NULL) > + return -ENOMEM; > + > + switch (mode) { > + case RTE_ETH_DEV_POWER_MGMT_CB_WAIT: > + if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_WAITPKG)) > + return -ENOTSUP; Here and in other places: in case of error return you don't' free your empt= y_poll_stats. > + dev->cur_pwr_cb =3D rte_eth_add_rx_callback(port_id, 0, Why zero for queue number, why not to pass queue_id as a parameter for that= function? > + rte_power_mgmt_umwait, NULL); As I said above, instead of NULL - could be pointer to metadata struct. > + break; > + case RTE_ETH_DEV_POWER_MGMT_CB_SCALE: > + /* init scale freq */ > + if (rte_power_init(lcore_id)) > + return -EINVAL; > + dev->cur_pwr_cb =3D rte_eth_add_rx_callback(port_id, 0, > + rte_power_mgmt_scalefreq, NULL); > + break; > + case RTE_ETH_DEV_POWER_MGMT_CB_PAUSE: > + dev->cur_pwr_cb =3D rte_eth_add_rx_callback(port_id, 0, > + rte_power_mgmt_pause, NULL); > + break; > + } > + > + dev->cb_mode =3D mode; > + dev->pwr_mgmt_state =3D RTE_ETH_DEV_POWER_MGMT_ENABLED; > + return 0; > +} > + > +int > +rte_power_pmd_mgmt_disable(unsigned int lcore_id, > + uint16_t port_id) > +{ > + struct rte_eth_dev *dev; > + > + RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL); > + dev =3D &rte_eth_devices[port_id]; > + > + /*add flag check */ > + > + if (dev->pwr_mgmt_state =3D=3D RTE_ETH_DEV_POWER_MGMT_DISABLED) > + return -EINVAL; > + > + /* rte_free ignores NULL so safe to call without checks */ > + rte_free(dev->empty_poll_stats); You can't free callback metadata before removing the callback itself. In fact, with current rx callback code it is not safe to free it even after (we discussed it offline). > + > + switch (dev->cb_mode) { > + case RTE_ETH_DEV_POWER_MGMT_CB_WAIT: > + case RTE_ETH_DEV_POWER_MGMT_CB_PAUSE: > + rte_eth_remove_rx_callback(port_id, 0, > + dev->cur_pwr_cb); > + break; > + case RTE_ETH_DEV_POWER_MGMT_CB_SCALE: > + rte_power_freq_max(lcore_id); Stupid q: what makes you think that lcore frequency was max, *before* you setup the callback? > + rte_eth_remove_rx_callback(port_id, 0, > + dev->cur_pwr_cb); > + if (rte_power_exit(lcore_id)) > + return -EINVAL; > + break; > + } > + > + dev->pwr_mgmt_state =3D RTE_ETH_DEV_POWER_MGMT_DISABLED; > + dev->cur_pwr_cb =3D NULL; > + dev->cb_mode =3D 0; > + > + return 0; > +} > diff --git a/lib/librte_power/rte_power_version.map b/lib/librte_power/rt= e_power_version.map > index 00ee5753e2..ade83cfd4f 100644 > --- a/lib/librte_power/rte_power_version.map > +++ b/lib/librte_power/rte_power_version.map > @@ -34,4 +34,8 @@ EXPERIMENTAL { > rte_power_guest_channel_receive_msg; > rte_power_poll_stat_fetch; > rte_power_poll_stat_update; > + # added in 20.08 > + rte_power_pmd_mgmt_disable; > + rte_power_pmd_mgmt_enable; > + > }; > -- > 2.17.1