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 EE186A04E6; Fri, 30 Oct 2020 19:33:26 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 3B3A6BE65; Fri, 30 Oct 2020 19:26:44 +0100 (CET) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 7490068C0 for ; Fri, 30 Oct 2020 19:26:09 +0100 (CET) IronPort-SDR: Zl7XDlPArnMqqjSLNpm3hHtk6KCfu3ZHyjVPPHmDgWXg/K8s8cGMnflh46Ddg9b+iUAQeZjHxR 8RrRjGgVk1Zw== X-IronPort-AV: E=McAfee;i="6000,8403,9790"; a="155624192" X-IronPort-AV: E=Sophos;i="5.77,434,1596524400"; d="scan'208";a="155624192" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2020 11:26:08 -0700 IronPort-SDR: mQC96mTh7djawkdHb0Dne2RoET5uFTIq0UBPhWjyWphNt1ITyfbb0aVmS70My75nT5xcQdfvEr 6xUAu3Yv8rmA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,434,1596524400"; d="scan'208";a="361926485" Received: from txasoft-yocto.an.intel.com ([10.123.72.192]) by FMSMGA003.fm.intel.com with ESMTP; 30 Oct 2020 11:26:07 -0700 From: Timothy McDaniel To: Ray Kinsella , Neil Horman Cc: dev@dpdk.org, erik.g.carrillo@intel.com, gage.eads@intel.com, harry.van.haaren@intel.com, jerinj@marvell.com, thomas@monjalon.net Date: Fri, 30 Oct 2020 13:27:35 -0500 Message-Id: <1604082458-15368-21-git-send-email-timothy.mcdaniel@intel.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1604082458-15368-1-git-send-email-timothy.mcdaniel@intel.com> References: <20200612212434.6852-2-timothy.mcdaniel@intel.com> <1604082458-15368-1-git-send-email-timothy.mcdaniel@intel.com> Subject: [dpdk-dev] [PATCH v10 20/23] event/dlb: add PMD's token pop public interface 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" The PMD uses a public interface to allow applications to control the token pop mode. Supported token pop modes are as follows, and they impact core scheduling affinity for ldb ports. AUTO_POP: Pop the CQ tokens immediately after dequeueing. DELAYED_POP: Pop CQ tokens after (dequeue_depth - 1) events are released. Supported on load-balanced ports only. DEFERRED_POP: Pop the CQ tokens during next dequeue operation. Signed-off-by: Timothy McDaniel Reviewed-by: Gage Eads --- doc/api/doxy-api-index.md | 1 + drivers/event/dlb/dlb.c | 121 ++++++++++++++++++++++++++++++++++++---- drivers/event/dlb/dlb_priv.h | 3 + drivers/event/dlb/meson.build | 4 +- drivers/event/dlb/rte_pmd_dlb.c | 38 +++++++++++++ drivers/event/dlb/rte_pmd_dlb.h | 77 +++++++++++++++++++++++++ drivers/event/dlb/version.map | 6 ++ 7 files changed, 237 insertions(+), 13 deletions(-) create mode 100644 drivers/event/dlb/rte_pmd_dlb.c create mode 100644 drivers/event/dlb/rte_pmd_dlb.h diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md index a9c12d1..1c83bf4 100644 --- a/doc/api/doxy-api-index.md +++ b/doc/api/doxy-api-index.md @@ -52,6 +52,7 @@ The public API headers are grouped by topics: [dpaa2_cmdif] (@ref rte_pmd_dpaa2_cmdif.h), [dpaa2_qdma] (@ref rte_pmd_dpaa2_qdma.h), [crypto_scheduler] (@ref rte_cryptodev_scheduler.h) + [dlb] (@ref rte_pmd_dlb.h), - **memory**: [memseg] (@ref rte_memory.h), diff --git a/drivers/event/dlb/dlb.c b/drivers/event/dlb/dlb.c index 3ba851a..d6f1575 100644 --- a/drivers/event/dlb/dlb.c +++ b/drivers/event/dlb/dlb.c @@ -1022,6 +1022,33 @@ dlb_hw_create_ldb_port(struct dlb_eventdev *dlb, qm_port->dequeue_depth = dequeue_depth; + /* When using the reserved token scheme, token_pop_thresh is + * initially 2 * dequeue_depth. Once the tokens are reserved, + * the enqueue code re-assigns it to dequeue_depth. + */ + qm_port->token_pop_thresh = cq_depth; + + /* When the deferred scheduling vdev arg is selected, use deferred pop + * for all single-entry CQs. + */ + if (cfg.cq_depth == 1 || (cfg.cq_depth == 2 && use_rsvd_token_scheme)) { + if (dlb->defer_sched) + qm_port->token_pop_mode = DEFERRED_POP; + } + + /* The default enqueue functions do not include delayed-pop support for + * performance reasons. + */ + if (qm_port->token_pop_mode == DELAYED_POP) { + dlb->event_dev->enqueue = dlb_event_enqueue_delayed; + dlb->event_dev->enqueue_burst = + dlb_event_enqueue_burst_delayed; + dlb->event_dev->enqueue_new_burst = + dlb_event_enqueue_new_burst_delayed; + dlb->event_dev->enqueue_forward_burst = + dlb_event_enqueue_forward_burst_delayed; + } + qm_port->owed_tokens = 0; qm_port->issued_releases = 0; @@ -1182,6 +1209,8 @@ dlb_hw_create_dir_port(struct dlb_eventdev *dlb, qm_port->dequeue_depth = dequeue_depth; + /* Directed ports are auto-pop, by default. */ + qm_port->token_pop_mode = AUTO_POP; qm_port->owed_tokens = 0; qm_port->issued_releases = 0; @@ -2682,7 +2711,8 @@ dlb_consume_qe_immediate(struct dlb_port *qm_port, int num) static inline uint16_t __dlb_event_enqueue_burst(void *event_port, const struct rte_event events[], - uint16_t num) + uint16_t num, + bool use_delayed) { struct dlb_eventdev_port *ev_port = event_port; struct dlb_port *qm_port = &ev_port->qm_port; @@ -2710,6 +2740,35 @@ __dlb_event_enqueue_burst(void *event_port, for (; j < DLB_NUM_QES_PER_CACHE_LINE && (i + j) < num; j++) { const struct rte_event *ev = &events[i + j]; + int16_t thresh = qm_port->token_pop_thresh; + + if (use_delayed && + qm_port->token_pop_mode == DELAYED_POP && + (ev->op == RTE_EVENT_OP_FORWARD || + ev->op == RTE_EVENT_OP_RELEASE) && + qm_port->issued_releases >= thresh - 1) { + /* Insert the token pop QE and break out. This + * may result in a partial HCW, but that is + * simpler than supporting arbitrary QE + * insertion. + */ + dlb_construct_token_pop_qe(qm_port, j); + + /* Reset the releases for the next QE batch */ + qm_port->issued_releases -= thresh; + + /* When using delayed token pop mode, the + * initial token threshold is the full CQ + * depth. After the first token pop, we need to + * reset it to the dequeue_depth. + */ + qm_port->token_pop_thresh = + qm_port->dequeue_depth; + + pop_offs = 1; + j++; + break; + } if (dlb_event_enqueue_prep(ev_port, qm_port, ev, port_data, &sched_types[j], @@ -2745,7 +2804,7 @@ dlb_event_enqueue_burst(void *event_port, const struct rte_event events[], uint16_t num) { - return __dlb_event_enqueue_burst(event_port, events, num); + return __dlb_event_enqueue_burst(event_port, events, num, false); } static inline uint16_t @@ -2753,21 +2812,21 @@ dlb_event_enqueue_burst_delayed(void *event_port, const struct rte_event events[], uint16_t num) { - return __dlb_event_enqueue_burst(event_port, events, num); + return __dlb_event_enqueue_burst(event_port, events, num, true); } static inline uint16_t dlb_event_enqueue(void *event_port, const struct rte_event events[]) { - return __dlb_event_enqueue_burst(event_port, events, 1); + return __dlb_event_enqueue_burst(event_port, events, 1, false); } static inline uint16_t dlb_event_enqueue_delayed(void *event_port, const struct rte_event events[]) { - return __dlb_event_enqueue_burst(event_port, events, 1); + return __dlb_event_enqueue_burst(event_port, events, 1, true); } static uint16_t @@ -2775,7 +2834,7 @@ dlb_event_enqueue_new_burst(void *event_port, const struct rte_event events[], uint16_t num) { - return __dlb_event_enqueue_burst(event_port, events, num); + return __dlb_event_enqueue_burst(event_port, events, num, false); } static uint16_t @@ -2783,7 +2842,7 @@ dlb_event_enqueue_new_burst_delayed(void *event_port, const struct rte_event events[], uint16_t num) { - return __dlb_event_enqueue_burst(event_port, events, num); + return __dlb_event_enqueue_burst(event_port, events, num, true); } static uint16_t @@ -2791,7 +2850,7 @@ dlb_event_enqueue_forward_burst(void *event_port, const struct rte_event events[], uint16_t num) { - return __dlb_event_enqueue_burst(event_port, events, num); + return __dlb_event_enqueue_burst(event_port, events, num, false); } static uint16_t @@ -2799,7 +2858,7 @@ dlb_event_enqueue_forward_burst_delayed(void *event_port, const struct rte_event events[], uint16_t num) { - return __dlb_event_enqueue_burst(event_port, events, num); + return __dlb_event_enqueue_burst(event_port, events, num, true); } static __rte_always_inline int @@ -3211,7 +3270,8 @@ dlb_hw_dequeue(struct dlb_eventdev *dlb, qm_port->owed_tokens += num; - dlb_consume_qe_immediate(qm_port, num); + if (num && qm_port->token_pop_mode == AUTO_POP) + dlb_consume_qe_immediate(qm_port, num); ev_port->outstanding_releases += num; @@ -3336,7 +3396,8 @@ dlb_hw_dequeue_sparse(struct dlb_eventdev *dlb, qm_port->owed_tokens += num; - dlb_consume_qe_immediate(qm_port, num); + if (num && qm_port->token_pop_mode == AUTO_POP) + dlb_consume_qe_immediate(qm_port, num); ev_port->outstanding_releases += num; @@ -3380,6 +3441,28 @@ dlb_event_release(struct dlb_eventdev *dlb, uint8_t port_id, int n) qm_port->qe4[3].cmd_byte = 0; for (; j < DLB_NUM_QES_PER_CACHE_LINE && (i + j) < n; j++) { + int16_t thresh = qm_port->token_pop_thresh; + + if (qm_port->token_pop_mode == DELAYED_POP && + qm_port->issued_releases >= thresh - 1) { + /* Insert the token pop QE */ + dlb_construct_token_pop_qe(qm_port, j); + + /* Reset the releases for the next QE batch */ + qm_port->issued_releases -= thresh; + + /* When using delayed token pop mode, the + * initial token threshold is the full CQ + * depth. After the first token pop, we need to + * reset it to the dequeue_depth. + */ + qm_port->token_pop_thresh = + qm_port->dequeue_depth; + + pop_offs = 1; + j++; + break; + } qm_port->qe4[j].cmd_byte = DLB_COMP_CMD_BYTE; qm_port->issued_releases++; @@ -3412,6 +3495,7 @@ dlb_event_dequeue_burst(void *event_port, struct rte_event *ev, uint16_t num, uint64_t wait) { struct dlb_eventdev_port *ev_port = event_port; + struct dlb_port *qm_port = &ev_port->qm_port; struct dlb_eventdev *dlb = ev_port->dlb; uint16_t cnt; int ret; @@ -3431,6 +3515,10 @@ dlb_event_dequeue_burst(void *event_port, struct rte_event *ev, uint16_t num, DLB_INC_STAT(ev_port->stats.tx_implicit_rel, out_rels); } + if (qm_port->token_pop_mode == DEFERRED_POP && + qm_port->owed_tokens) + dlb_consume_qe_immediate(qm_port, qm_port->owed_tokens); + cnt = dlb_hw_dequeue(dlb, ev_port, ev, num, wait); DLB_INC_STAT(ev_port->stats.traffic.total_polls, 1); @@ -3449,6 +3537,7 @@ dlb_event_dequeue_burst_sparse(void *event_port, struct rte_event *ev, uint16_t num, uint64_t wait) { struct dlb_eventdev_port *ev_port = event_port; + struct dlb_port *qm_port = &ev_port->qm_port; struct dlb_eventdev *dlb = ev_port->dlb; uint16_t cnt; int ret; @@ -3468,6 +3557,10 @@ dlb_event_dequeue_burst_sparse(void *event_port, struct rte_event *ev, DLB_INC_STAT(ev_port->stats.tx_implicit_rel, out_rels); } + if (qm_port->token_pop_mode == DEFERRED_POP && + qm_port->owed_tokens) + dlb_consume_qe_immediate(qm_port, qm_port->owed_tokens); + cnt = dlb_hw_dequeue_sparse(dlb, ev_port, ev, num, wait); DLB_INC_STAT(ev_port->stats.traffic.total_polls, 1); @@ -3774,7 +3867,7 @@ dlb_primary_eventdev_probe(struct rte_eventdev *dev, struct dlb_devargs *dlb_args) { struct dlb_eventdev *dlb; - int err; + int err, i; dlb = dev->data->dev_private; @@ -3823,6 +3916,10 @@ dlb_primary_eventdev_probe(struct rte_eventdev *dev, return err; } + /* Initialize each port's token pop mode */ + for (i = 0; i < DLB_MAX_NUM_PORTS; i++) + dlb->ev_ports[i].qm_port.token_pop_mode = AUTO_POP; + rte_spinlock_init(&dlb->qm_instance.resource_lock); dlb_iface_low_level_io_init(dlb); diff --git a/drivers/event/dlb/dlb_priv.h b/drivers/event/dlb/dlb_priv.h index adb1f7a..58ff428 100644 --- a/drivers/event/dlb/dlb_priv.h +++ b/drivers/event/dlb/dlb_priv.h @@ -16,6 +16,7 @@ #include "dlb_user.h" #include "dlb_log.h" +#include "rte_pmd_dlb.h" #ifndef RTE_LIBRTE_PMD_DLB_QUELL_STATS #define DLB_INC_STAT(_stat, _incr_val) ((_stat) += _incr_val) @@ -262,6 +263,7 @@ struct dlb_port { bool gen_bit; uint16_t dir_credits; uint32_t dequeue_depth; + enum dlb_token_pop_mode token_pop_mode; int pp_mmio_base; uint16_t cached_ldb_credits; uint16_t ldb_pushcount_at_credit_expiry; @@ -273,6 +275,7 @@ struct dlb_port { uint8_t cq_rsvd_token_deficit; uint16_t owed_tokens; int16_t issued_releases; + int16_t token_pop_thresh; int cq_depth; uint16_t cq_idx; uint16_t cq_idx_unmasked; diff --git a/drivers/event/dlb/meson.build b/drivers/event/dlb/meson.build index 552ff9d..7f38c30 100644 --- a/drivers/event/dlb/meson.build +++ b/drivers/event/dlb/meson.build @@ -12,7 +12,9 @@ sources = files('dlb.c', 'dlb_xstats.c', 'pf/dlb_main.c', 'pf/dlb_pf.c', - 'pf/base/dlb_resource.c' + 'pf/base/dlb_resource.c', + 'rte_pmd_dlb.c', ) deps += ['mbuf', 'mempool', 'ring', 'pci', 'bus_pci'] +install_headers('rte_pmd_dlb.h') diff --git a/drivers/event/dlb/rte_pmd_dlb.c b/drivers/event/dlb/rte_pmd_dlb.c new file mode 100644 index 0000000..bc802d3 --- /dev/null +++ b/drivers/event/dlb/rte_pmd_dlb.c @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2020 Intel Corporation + */ + +#include "rte_eventdev.h" +#include "rte_eventdev_pmd.h" +#include "rte_pmd_dlb.h" +#include "dlb_priv.h" +#include "dlb_inline_fns.h" + +int +rte_pmd_dlb_set_token_pop_mode(uint8_t dev_id, + uint8_t port_id, + enum dlb_token_pop_mode mode) +{ + struct dlb_eventdev *dlb; + struct rte_eventdev *dev; + + RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL); + dev = &rte_eventdevs[dev_id]; + + dlb = dlb_pmd_priv(dev); + + if (mode >= NUM_TOKEN_POP_MODES) + return -EINVAL; + + /* The event device must be configured, but not yet started */ + if (!dlb->configured || dlb->run_state != DLB_RUN_STATE_STOPPED) + return -EINVAL; + + /* The token pop mode must be set before configuring the port */ + if (port_id >= dlb->num_ports || dlb->ev_ports[port_id].setup_done) + return -EINVAL; + + dlb->ev_ports[port_id].qm_port.token_pop_mode = mode; + + return 0; +} diff --git a/drivers/event/dlb/rte_pmd_dlb.h b/drivers/event/dlb/rte_pmd_dlb.h new file mode 100644 index 0000000..9cf6dd3 --- /dev/null +++ b/drivers/event/dlb/rte_pmd_dlb.h @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2019-2020 Intel Corporation + */ + +/*! + * @file rte_pmd_dlb.h + * + * @brief DLB PMD-specific functions + * + */ + +#ifndef _RTE_PMD_DLB_H_ +#define _RTE_PMD_DLB_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +/** + * @warning + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice + * + * Selects the token pop mode for an DLB port. + */ +enum dlb_token_pop_mode { + /* Pop the CQ tokens immediately after dequeueing. */ + AUTO_POP, + /* Pop CQ tokens after (dequeue_depth - 1) events are released. + * Supported on load-balanced ports only. + */ + DELAYED_POP, + /* Pop the CQ tokens during next dequeue operation. */ + DEFERRED_POP, + + /* NUM_TOKEN_POP_MODES must be last */ + NUM_TOKEN_POP_MODES +}; + +/*! + * @warning + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice + * + * Configure the token pop mode for an DLB port. By default, all ports use + * AUTO_POP. This function must be called before calling rte_event_port_setup() + * for the port, but after calling rte_event_dev_configure(). + * + * @note + * The defer_sched vdev arg, which configures all load-balanced ports with + * dequeue_depth == 1 for DEFERRED_POP mode, takes precedence over this + * function. + * + * @param dev_id + * The identifier of the event device. + * @param port_id + * The identifier of the event port. + * @param mode + * The token pop mode. + * + * @return + * - 0: Success + * - EINVAL: Invalid dev_id, port_id, or mode + * - EINVAL: The DLB is not configured, is already running, or the port is + * already setup + */ + +__rte_experimental +int +rte_pmd_dlb_set_token_pop_mode(uint8_t dev_id, + uint8_t port_id, + enum dlb_token_pop_mode mode); +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_PMD_DLB_H_ */ diff --git a/drivers/event/dlb/version.map b/drivers/event/dlb/version.map index 4a76d1d..3338a22 100644 --- a/drivers/event/dlb/version.map +++ b/drivers/event/dlb/version.map @@ -1,3 +1,9 @@ DPDK_21 { local: *; }; + +EXPERIMENTAL { + global: + + rte_pmd_dlb_set_token_pop_mode; +}; -- 2.6.4