From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on gnuweeb.org X-Spam-Level: * X-Spam-Status: No, score=1.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_SOFTFAIL autolearn=no autolearn_force=no version=3.4.6 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9F4EC433EF for ; Tue, 14 Jun 2022 14:37:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232649AbiFNOhn (ORCPT ); Tue, 14 Jun 2022 10:37:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238639AbiFNOhl (ORCPT ); Tue, 14 Jun 2022 10:37:41 -0400 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33522BC17 for ; Tue, 14 Jun 2022 07:37:40 -0700 (PDT) Received: by mail-wm1-x336.google.com with SMTP id q15so4782237wmj.2 for ; Tue, 14 Jun 2022 07:37:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Qur2mUk2lIwWV+4MC4+GnNmiI8AMpMlKR0W9PM7hs9o=; b=IpwiF00CRutFMZanlKTqmIl/hkvR0iwzzoMpwLgzcqoghhFnHw+BUd+I7d4bM6kGaz v6QZvo+QIx5eg2mnZSjW/khUdv2Xn8LUBE8AyrPy0FEZltqF+w9SlW5NMbco8eTvoLy4 SDRPEylpztmOmGx3QzVYl5k74PO6q/EgUWfvaLd94eCWBqYxQxDoRzrSvNONLr/rgKSo cE9n2FcRMeLSXlMxOxmw9uYLt9lHCQRoFohON8PAowNCBHnKAMaBKZwTuzNnASvVl4s4 7T7oNI1oHFzp/KHjbKhJoGcz3Duj/7nwHAIfe5p8+A+1v6zb96XQQoXHJ9EwKQyZyzC0 kA2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Qur2mUk2lIwWV+4MC4+GnNmiI8AMpMlKR0W9PM7hs9o=; b=YwsuXQ+agy91z6Ig7qP7MQRmRYYApfQnlGN7b0jg6l/Oc3x9LxQauQXVY2zvR0lEKD 1sccA7/7MTdrkCn89YIpl9UFdMPwrMnSc+WnkD3fdf/U7iMtVyvlHghUyRuu+M6i6Rkc 1I6KBH1oX02Ytkod7jQ5V4MS+sE4l7+FBupJSQv8tdyTrJDPxZD4jUbLSeXAyU6A/Cgp zWoVPGnutR/jady8+kUsBB+/KZwAH4LkSy9SJ18P+p9XKFJn/Ar8y0RwiMvFuXxjkmFS d+xpBVGGhCWC0DiIDfcoJE83uxpgE0vcWBoB9W919VcpRQtoPejv00ZV8OeyCLw3qghQ qPqA== X-Gm-Message-State: AOAM531jQ3+WSmuaxvpiMk9megC4iOJz+UiTLjj/ynJ098D5vV6jPfw5 R/TRdEWaMFVm2aphy93eUj0PrNsOsopuSg== X-Google-Smtp-Source: ABdhPJy+ohdR5LeBWLFYxR2zz2BrCI3VDKYMtUIWh4BawkjiVNiSzDkyzTXTI26lG3GcozD4I8TA2A== X-Received: by 2002:a05:600c:34c4:b0:39c:9236:4e9e with SMTP id d4-20020a05600c34c400b0039c92364e9emr4612180wmq.67.1655217458434; Tue, 14 Jun 2022 07:37:38 -0700 (PDT) Received: from 127.0.0.1localhost (188.28.125.106.threembb.co.uk. [188.28.125.106]) by smtp.gmail.com with ESMTPSA id a4-20020adff7c4000000b0021033caa332sm12353064wrq.42.2022.06.14.07.37.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jun 2022 07:37:37 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: Jens Axboe , asml.silence@gmail.com Subject: [PATCH for-next v2 00/25] 5.20 cleanups and poll optimisations Date: Tue, 14 Jun 2022 15:36:50 +0100 Message-Id: X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org 1-13 are cleanups after splitting io_uring into files. Patch 14 from Hao should remove some overhead from poll requests Patch 15 from Hao adds per-bucket spinlocks, and 16-19 do a little bit of cleanup. The downside of per-bucket spinlocks is that it adds additional spinlock/unlock pair in the poll request completion side, which shouldn't matter much with 20/25. Patch 20 uses inline completion infra for poll requests, this nicely improves perf when there is a good tw batching. Patch 21 implements the userspace visible side of IORING_SETUP_SINGLE_ISSUER, it'll be used for poll requests and later for spinlock optimisations. 22-25 introduces ->uring_lock protected cancellation hashing. It requires us to grab ->uring_lock in the completion side, but saves two spin lock/unlock pairs. We apply it automatically in cases the mutex is already likely to be held (see 25/25 description), so there is no additional mutex overhead and potential latency problemes. Numbers: The used poll benchmark each iteration queues a batch of 32 POLLIN poll requests and triggers all of them with read (+write). baseline (patches 1-18): 11720 K req/s base + 19 (+ inline completion infra) 12419 K req/s, ~+6% base + 19-25 (+ uring_lock hashing): 12804 K req/s, +9.2% from the baseline, or +3.2% relative to patch 19. Note that patch 19 only helps performance of poll-add requests, whenever 25/25 also improves apoll. v2: don't move ->cancel_seq out of iowq work struct fix up single-issuer Hao Xu (2): io_uring: poll: remove unnecessary req->ref set io_uring: switch cancel_hash to use per entry spinlock Pavel Begunkov (23): io_uring: make reg buf init consistent io_uring: move defer_list to slow data io_uring: better caching for ctx timeout fields io_uring: refactor ctx slow data placement io_uring: move small helpers to headers io_uring: explain io_wq_work::cancel_seq placement io_uring: inline ->registered_rings io_uring: don't set REQ_F_COMPLETE_INLINE in tw io_uring: never defer-complete multi-apoll io_uring: kill REQ_F_COMPLETE_INLINE io_uring: refactor io_req_task_complete() io_uring: don't inline io_put_kbuf io_uring: remove check_cq checking from hot paths io_uring: pass poll_find lock back io_uring: clean up io_try_cancel io_uring: limit number hash buckets io_uring: clean up io_ring_ctx_alloc io_uring: use state completion infra for poll reqs io_uring: add IORING_SETUP_SINGLE_ISSUER io_uring: pass hash table into poll_find io_uring: introduce a struct for hash table io_uring: propagate locking state to poll cancel io_uring: mutex locked poll hashing include/uapi/linux/io_uring.h | 5 +- io_uring/cancel.c | 23 +++- io_uring/cancel.h | 4 +- io_uring/fdinfo.c | 11 +- io_uring/io-wq.h | 1 + io_uring/io_uring.c | 145 +++++++++++----------- io_uring/io_uring.h | 17 +++ io_uring/io_uring_types.h | 108 +++++++++-------- io_uring/kbuf.c | 33 +++++ io_uring/kbuf.h | 38 +----- io_uring/poll.c | 219 +++++++++++++++++++++++++--------- io_uring/poll.h | 3 +- io_uring/rsrc.c | 9 +- io_uring/tctx.c | 36 ++++-- io_uring/tctx.h | 7 +- io_uring/timeout.c | 3 +- 16 files changed, 416 insertions(+), 246 deletions(-) -- 2.36.1