From patchwork Tue Nov 15 07:09:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 13043282 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 1E112C43217 for ; Tue, 15 Nov 2022 07:10:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232644AbiKOHJ5 (ORCPT ); Tue, 15 Nov 2022 02:09:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232647AbiKOHJy (ORCPT ); Tue, 15 Nov 2022 02:09:54 -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 7661620354 for ; Mon, 14 Nov 2022 23:09:45 -0800 (PST) Received: by dev0134.prn3.facebook.com (Postfix, from userid 425415) id 2098915F1107; 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 1/4] liburing: add api to set napi busy poll settings Date: Mon, 14 Nov 2022 23:09:30 -0800 Message-Id: <20221115070933.1792142-2-shr@devkernel.io> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221115070933.1792142-1-shr@devkernel.io> References: <20221115070933.1792142-1-shr@devkernel.io> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This adds three functions to manage the napi busy poll settings: - io_uring_register_napi_busy_poll_timeout - io_uring_unregister_napi_busy_poll_timeout - io_uring_register_napi_prefer_busy_poll Signed-off-by: Stefan Roesch --- src/include/liburing.h | 6 ++++++ src/include/liburing/io_uring.h | 4 ++++ src/liburing.map | 7 +++++++ src/register.c | 23 +++++++++++++++++++++++ 4 files changed, 40 insertions(+) diff --git a/src/include/liburing.h b/src/include/liburing.h index 12a703f..47bbced 100644 --- a/src/include/liburing.h +++ b/src/include/liburing.h @@ -235,6 +235,12 @@ int io_uring_register_sync_cancel(struct io_uring *ring, int io_uring_register_file_alloc_range(struct io_uring *ring, unsigned off, unsigned len); +int io_uring_register_napi_prefer_busy_poll(struct io_uring *ring, + bool prefer_busy_poll); +int io_uring_register_napi_busy_poll_timeout(struct io_uring *ring, + unsigned int to); +int io_uring_unregister_napi_busy_poll_timeout(struct io_uring *ring); + int io_uring_get_events(struct io_uring *ring); int io_uring_submit_and_get_events(struct io_uring *ring); diff --git a/src/include/liburing/io_uring.h b/src/include/liburing/io_uring.h index a3e0920..2e53f52 100644 --- a/src/include/liburing/io_uring.h +++ b/src/include/liburing/io_uring.h @@ -499,6 +499,10 @@ enum { /* register a range of fixed file slots for automatic slot allocation */ IORING_REGISTER_FILE_ALLOC_RANGE = 25, + /* set/clear busy poll settings */ + IORING_REGISTER_NAPI_PREFER_BUSY_POLL = 26, + IORING_REGISTER_NAPI_BUSY_POLL_TIMEOUT = 27, + /* this goes last */ IORING_REGISTER_LAST }; diff --git a/src/liburing.map b/src/liburing.map index 06c64f8..2e41a40 100644 --- a/src/liburing.map +++ b/src/liburing.map @@ -67,3 +67,10 @@ LIBURING_2.3 { io_uring_get_events; io_uring_submit_and_get_events; } LIBURING_2.2; + +LIBURING_2.4 { + global: + io_uring_napi_register_prefer_busy_poll; + io_uring_napi_register_busy_poll_timeout; + io_uring_napi_unregister_busy_poll_timeout; +} LIBURING_2.3; diff --git a/src/register.c b/src/register.c index e849825..50250b8 100644 --- a/src/register.c +++ b/src/register.c @@ -367,3 +367,26 @@ int io_uring_register_file_alloc_range(struct io_uring *ring, IORING_REGISTER_FILE_ALLOC_RANGE, &range, 0); } + +int io_uring_register_napi_prefer_busy_poll(struct io_uring *ring, + bool prefer_busy_poll) +{ + return __sys_io_uring_register(ring->ring_fd, + IORING_REGISTER_NAPI_PREFER_BUSY_POLL, + NULL, prefer_busy_poll); +} + +int io_uring_register_napi_busy_poll_timeout(struct io_uring *ring, + unsigned int to) +{ + return __sys_io_uring_register(ring->ring_fd, + IORING_REGISTER_NAPI_BUSY_POLL_TIMEOUT, + NULL, to); +} + +int io_uring_unregister_napi_busy_poll_timeout(struct io_uring *ring) +{ + return __sys_io_uring_register(ring->ring_fd, + IORING_REGISTER_NAPI_BUSY_POLL_TIMEOUT, + NULL, 0); +}