From mboxrd@z Thu Jan 1 00:00:00 1970 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 01EC7CCA47E for ; Wed, 15 Jun 2022 16:34:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356290AbiFOQec (ORCPT ); Wed, 15 Jun 2022 12:34:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356571AbiFOQeb (ORCPT ); Wed, 15 Jun 2022 12:34:31 -0400 Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com [IPv6:2a00:1450:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A70E337BFE for ; Wed, 15 Jun 2022 09:34:29 -0700 (PDT) Received: by mail-wr1-x430.google.com with SMTP id s1so16098995wra.9 for ; Wed, 15 Jun 2022 09:34:29 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=i2M2vqRQ9RAoU3bnpdZxapmtH2oq59EBP0ozhlRRLD0=; b=n+D5Z7h0EBWZocZu3NTaQ99ROfPBOfhlspVUjwaQPpXbQ1fi9NJYO97FzzzPAaPcZ/ 2Pjr9jXfVywH8k1Y/r7Stav4Z6ZcCgl9S5F3r1X7T+bM1uhtWE8Q1BoItHgnp02ShyH7 +EuWQulc2YzHdCBKrnT/Y5j3VJbEQOSo4x2XjBHLH58MBQvL1CaM+7euUhcoCmPstHnm USTt/Ak9Ji+PYgGY41c8NRaAc8j17Lje+O37O+9J2D5003ep0t9bk45V1VsY+YVQ/exl MbtwYRY/zgFfYafiaT3t5HMjME53uDIjYVmu5GkOUaaM270iz7ry2L5zeZtcvw4DLQ/Y Gq2g== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=i2M2vqRQ9RAoU3bnpdZxapmtH2oq59EBP0ozhlRRLD0=; b=fqpyCJKUKctK3tXbXvm7lgjWGuZQjrqiErPLGZ+ldvbp+4pHa2FOROWir3g/XBD1WE TI53kvbz5jYJ7f/lHWBbeZsn603sWHPTy4zAUDSGljYaowUtj96Ji/oiYaTyU6DIn5R9 +Qlm1AvfIH1J/Hk2LDMxspTsbPNFI/KD5gfsQnOvLQiFJ4ymseDv5cUI7hNzKpBPvE1X nc4ifR0y2Lo4xL+Shr+oW8Jli/Ov3CrDvRqjNYuOXeEtd7Rm8bFlCzIh6kkqta1JSne9 SfFNOmEiMYKqBFBGFJW3mAJxSseg4nyZ0bsdDkg4szk710BGcyYjlXVIy66SrPL67B0z a9/w== X-Gm-Message-State: AJIora8W6AzG9AVgG5nps+yEloZNt4kcm2hV08YAZWOeEKNgdxNNfVv6 vOI9bn96oj9/AjM7ok2xQeiGw4GiGtumFw== X-Google-Smtp-Source: AGRyM1tWHHKe4uGZMAppyDKdJ5WD3gwlXi15FPRbwJS/Z1Oxs9Se0GZiVFkBjYT/QPxmfmujIsgtCQ== X-Received: by 2002:a5d:47cf:0:b0:213:bbe1:ba4d with SMTP id o15-20020a5d47cf000000b00213bbe1ba4dmr620714wrc.173.1655310867975; Wed, 15 Jun 2022 09:34:27 -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 u2-20020a056000038200b0020ff3a2a925sm17894953wrf.63.2022.06.15.09.34.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Jun 2022 09:34:27 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: Jens Axboe , asml.silence@gmail.com Subject: [PATCH for-next 03/10] io_uring: better caching for ctx timeout fields Date: Wed, 15 Jun 2022 17:33:49 +0100 Message-Id: <4b163793072840de53b3cb66e0c2995e7226ff78.1655310733.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Following timeout fields access patterns, move all of them into a separate cache line inside ctx, so they don't intervene with normal completion caching, especially since timeout removals and completion are separated and the later is done via tw. It also sheds some bytes from io_ring_ctx, 1216B -> 1152B Signed-off-by: Pavel Begunkov --- io_uring/io_uring_types.h | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/io_uring/io_uring_types.h b/io_uring/io_uring_types.h index bff73107f0f3..e050c3c4a7ac 100644 --- a/io_uring/io_uring_types.h +++ b/io_uring/io_uring_types.h @@ -179,8 +179,6 @@ struct io_ring_ctx { struct xarray io_bl_xa; struct list_head io_buffers_cache; - struct list_head timeout_list; - struct list_head ltimeout_list; struct list_head cq_overflow_list; struct list_head apoll_cache; struct xarray personalities; @@ -213,15 +211,11 @@ struct io_ring_ctx { struct io_ev_fd __rcu *io_ev_fd; struct wait_queue_head cq_wait; unsigned cq_extra; - atomic_t cq_timeouts; - unsigned cq_last_tm_flush; } ____cacheline_aligned_in_smp; struct { spinlock_t completion_lock; - spinlock_t timeout_lock; - /* * ->iopoll_list is protected by the ctx->uring_lock for * io_uring instances that don't use IORING_SETUP_SQPOLL. @@ -253,6 +247,15 @@ struct io_ring_ctx { struct list_head io_buffers_pages; }; + /* timeouts */ + struct { + spinlock_t timeout_lock; + atomic_t cq_timeouts; + struct list_head timeout_list; + struct list_head ltimeout_list; + unsigned cq_last_tm_flush; + } ____cacheline_aligned_in_smp; + /* Keep this last, we don't need it for the fast path */ struct { #if defined(CONFIG_UNIX) -- 2.36.1