From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 5FFAE45954; Tue, 10 Sep 2024 10:31:34 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id E3D504021F; Tue, 10 Sep 2024 10:31:33 +0200 (CEST) Received: from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) by mails.dpdk.org (Postfix) with ESMTP id 9516440151 for <dev@dpdk.org>; Tue, 10 Sep 2024 10:31:31 +0200 (CEST) Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 48A4fnSO029408; Tue, 10 Sep 2024 01:31:30 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h= cc:content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=pfpt0220; bh=N/RisD4FpLu19xJ8AMrqTZf O9GI6f7WOvr40EVB0HCs=; b=WjTJa/xif6xL2H7Jr/FOkNX9cOwSnmmU4bYxNli 2xtbgWRaoCJGOI5EOvOmO00w6TmXPpyonQcoCbVNhrcCkAmpZioXb7gQjarw3zzG 6gjYB1FTBDPpC1BE+Q1/0z6+JCzRwBAsY92J+GDWQ9F4mqnpin1Z2K0iARgoYZM+ 8XXFLiANiOTH/q4DgwnZmkCWsVUYKglNbuLrN9JYUcXpr8iTINLtRrn3xyNZNkIM P74L8GN4uGC4fkU6YVBwLMo/WKusPSFoFerlm5tmUDohW+9nemCTsq+5zheKt9pb DaZxH3fFTXHVLITWYW3T9YkEA74r+EpjiYQoQfnRN3PVO0w== Received: from dc5-exch05.marvell.com ([199.233.59.128]) by mx0a-0016f401.pphosted.com (PPS) with ESMTPS id 41gygtfxk0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 10 Sep 2024 01:31:30 -0700 (PDT) Received: from DC5-EXCH05.marvell.com (10.69.176.209) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Tue, 10 Sep 2024 01:31:29 -0700 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server id 15.2.1544.4 via Frontend Transport; Tue, 10 Sep 2024 01:31:29 -0700 Received: from MININT-80QBFE8.corp.innovium.com (MININT-80QBFE8.marvell.com [10.28.164.106]) by maili.marvell.com (Postfix) with ESMTP id EE6F13F709E; Tue, 10 Sep 2024 01:31:25 -0700 (PDT) From: <pbhagavatula@marvell.com> To: <jerinj@marvell.com>, <sthotton@marvell.com>, <abdullah.sevincer@intel.com>, <hemant.agrawal@nxp.com>, <sachin.saxena@oss.nxp.com>, <harry.van.haaren@intel.com>, <mattias.ronnblom@ericsson.com>, <liangma@liangbit.com>, <peter.mccarthy@intel.com> CC: <dev@dpdk.org>, Pavan Nikhilesh <pbhagavatula@marvell.com> Subject: [RFC 0/3] Introduce event prefetching Date: Tue, 10 Sep 2024 14:01:14 +0530 Message-ID: <20240910083117.4281-1-pbhagavatula@marvell.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Proofpoint-ORIG-GUID: KDXzXOia7sHiBDnfDl_NhRlG_fo-O5Cp X-Proofpoint-GUID: KDXzXOia7sHiBDnfDl_NhRlG_fo-O5Cp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org From: Pavan Nikhilesh <pbhagavatula@marvell.com> Event prefetching improves scheduling performance by pre-scheduling events to event ports when dequeues are issued. This series introduces various types and levels of prefetching to the eventdev library. Prefetching Types: * RTE_EVENT_DEV_PREFETCH_NONE: No prefetching. * RTE_EVENT_DEV_PREFETCH: Always issue a prefetch when dequeue is issued. * RTE_EVENT_DEV_PREFETCH_INTELLIGENT: Delay issuing prefetch until there are no forward progress constraints with the held flow contexts. Prefetching Levels: * Event Device Level Prefetch: Prefetching can be enabled or disabled at the event device during configuration. Event devices can indicate prefetching capabilities using `RTE_EVENT_DEV_CAP_EVENT_PREFETCH` and `RTE_EVENT_DEV_CAP_EVENT_INTELLIGENT_PREFETCH` via the event device info function `info.event_dev_cap`. * Event Port Level Prefetch: Prefetching can be selectively enabled or disabled at the event port during runtime. Event devices can indicate this capability using `RTE_EVENT_PORT_CAP_EVENT_PER_PORT_PREFETCH` via the event device info function `info.event_port_cap`. * Application Controlled Prefetch Hint: Applications can provide hints to the event device to start prefetching events using the new API `rte_event_port_prefetch`. Event devices can indicate this capabilities using `RTE_EVENT_DEV_CAP_SW_PREFETCH` via the event device info function `info.event_dev_cap`. The rte_event_dequeue_burst operation initiates the prefetch operation, which completes in parallel without affecting the dequeued event flow context and dequeue latency. On the next dequeue operation, the prefetched events are dequeued, and prefetch is initiated again. In the case of application-controlled prefetch hints, the currently held flow contexts, if any, are not affected by the prefetch operation. On the next dequeue operation, the prefetched events are returned, but prefetch is not initiated again until the application provides the hint again. If prefetching is already enabled at the event device level or event port level, the hint is ignored. Pavan Nikhilesh (3): eventdev: introduce event prefetching eventdev: allow event ports to modified prefetches eventdev: add SW event prefetch hint app/test/test_eventdev.c | 113 +++++++++++++++ doc/guides/prog_guide/eventdev/eventdev.rst | 42 ++++++ lib/eventdev/eventdev_pmd.h | 4 + lib/eventdev/eventdev_private.c | 19 +++ lib/eventdev/eventdev_trace_points.c | 6 + lib/eventdev/rte_eventdev.h | 152 ++++++++++++++++++++ lib/eventdev/rte_eventdev_core.h | 9 ++ lib/eventdev/rte_eventdev_trace_fp.h | 19 ++- lib/eventdev/version.map | 6 + 9 files changed, 369 insertions(+), 1 deletion(-) -- 2.46.0