From patchwork Tue Nov 15 07:09:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 13043281 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8DCAC43219 for ; Tue, 15 Nov 2022 07:09:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232617AbiKOHJ4 (ORCPT ); Tue, 15 Nov 2022 02:09:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37888 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231602AbiKOHJx (ORCPT ); Tue, 15 Nov 2022 02:09:53 -0500 Received: from 66-220-144-178.mail-mxout.facebook.com (66-220-144-178.mail-mxout.facebook.com [66.220.144.178]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 535951FFAD for ; Mon, 14 Nov 2022 23:09:45 -0800 (PST) Received: by dev0134.prn3.facebook.com (Postfix, from userid 425415) id 1C8B815F1105; Mon, 14 Nov 2022 23:09:35 -0800 (PST) From: Stefan Roesch To: kernel-team@fb.com Cc: shr@devkernel.io, axboe@kernel.dk, olivier@trillion01.com, netdev@vger.kernel.org, io-uring@vger.kernel.org, kuba@kernel.org, ammarfaizi2@gnuweeb.org Subject: [RFC PATCH v3 0/4] liburing: add api for napi busy poll timeout Date: Mon, 14 Nov 2022 23:09:29 -0800 Message-Id: <20221115070933.1792142-1-shr@devkernel.io> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This adds three new api's to set/clear the napi busy poll timeout and to set the napi prefer busy poll setting. The three new functions are called: - io_uring_napi_register_busy_poll_timeout, - io_uring_napi_unregister_busy_poll_timeout, - io_uring_register_napi_prefer_busy_poll. The patch series also contains the documentation for the three new functions and two example programs. The client program is called napi-busy-poll-client and the server program napi-busy-poll-server. The client measures the roundtrip times of requests. There is also a kernel patch "io-uring: support napi busy poll" to enable this feature on the kernel side. Changes: - V3: - Updated liburing.map file - Moved example programs from the test directory to the example directory. The two example programs don't fit well in the test category and need to be run from separate hosts. - Added the io_uring_register_napi_prefer_busy_poll API. - Added the call to io_uring_register_napi_prefer_busy_poll to the example programs - Updated the documentation - V2: - Updated the liburing.map file for the two new functions. (added a 2.4 section) - Added a description of the new feature to the changelog file - Fixed the indentation of the longopts structure - Used defined exit constants - Fixed encodeUserData to support 32 bit builds Signed-off-by: Stefan Roesch Stefan Roesch (4): liburing: add api to set napi busy poll settings liburing: add documentation for new napi busy polling liburing: add test programs for napi busy poll liburing: update changelog with new feature .gitignore | 2 + CHANGELOG | 3 + examples/Makefile | 2 + examples/napi-busy-poll-client.c | 432 ++++++++++++++++++ examples/napi-busy-poll-server.c | 380 +++++++++++++++ ...io_uring_register_napi_busy_poll_timeout.3 | 35 ++ man/io_uring_register_napi_prefer_busy_poll.3 | 35 ++ ..._uring_unregister_napi_busy_poll_timeout.3 | 26 ++ src/include/liburing.h | 6 + src/include/liburing/io_uring.h | 4 + src/liburing.map | 7 + src/register.c | 23 + 12 files changed, 955 insertions(+) create mode 100644 examples/napi-busy-poll-client.c create mode 100644 examples/napi-busy-poll-server.c create mode 100644 man/io_uring_register_napi_busy_poll_timeout.3 create mode 100644 man/io_uring_register_napi_prefer_busy_poll.3 create mode 100644 man/io_uring_unregister_napi_busy_poll_timeout.3 base-commit: 8fc22e3b3348c0a6384ec926e0b19b6707622e58