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 X-Spam-Level: X-Spam-Status: No, score=-4.6 required=3.0 tests=BAYES_00,DATE_IN_PAST_06_12, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4F91C4363A for ; Wed, 28 Oct 2020 21:53:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EBB324724 for ; Wed, 28 Oct 2020 21:53:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="K2Zzo/FK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727690AbgJ1Vxk (ORCPT ); Wed, 28 Oct 2020 17:53:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728434AbgJ1Vxi (ORCPT ); Wed, 28 Oct 2020 17:53:38 -0400 Received: from mail-io1-xd43.google.com (mail-io1-xd43.google.com [IPv6:2607:f8b0:4864:20::d43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA981C0613D1 for ; Wed, 28 Oct 2020 14:53:37 -0700 (PDT) Received: by mail-io1-xd43.google.com with SMTP id p7so1110654ioo.6 for ; Wed, 28 Oct 2020 14:53:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=LjzZyERfBshbfOsnhqRr8v6KHucr3e1FtfldMxWiT2A=; b=K2Zzo/FKoCdCkWwwEr8WnH6tWPzDbx7ETgNfdPZJhUdOw0dE9Th1fJI5+H5kWszZiX C4vkXS93UcPQQOtUHweMK+YRfwb5wjeQJTLJq3hfxJd2kYwc3bCKgi+UIQlI+9o68QyB 9Vqzdv+wPsX12utqa+oR1l7bLb67bmnuzpH+NDgBOSdXIjpEK9avrEW4/YlyBlq3GaLx ltc9QfVkbNiQvtDszUko3CvcTFNZB1hzjxuCv8NWdEajg77DeG/XozIFYfuKD6hkg4/S StvVFH99rie4AIk9Cy8VtrtXiSNMgUIXHWT5aF3YSLbhnA6rGrxwtSdfg+9iaFHMVHK+ ZQng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=LjzZyERfBshbfOsnhqRr8v6KHucr3e1FtfldMxWiT2A=; b=qVpRFKs5EWXQnV7bMybzU6RcI5Mo6Wowh5yHvCceUYlRBYfqfuznAIoSqbP8icuwmi DFyhQ//D86BtpgizTIREU98ss4Ol2jFb8xfYWQOFwXOSpMd5u6MhBv5Yq7boFH2x0WPn /j7fNvEKM7KOfdvKKEtCc4UaD60ZnCvR/u5Ta0e1XPmHErYjBb9st7QzvnGADYWiggGU xduIWg0m0lgF1W2BIoExzQeqFzCfhrpE27vGQ6vgfidciQz+z+cLw+efA7QHo9m1hvqe 9K936fq5Dn9xcwD+sYJsbIIEGO/kuMF8SE1Pc0GSTd0Z6XhMNv5L5YOG8PNgQ9riPNVQ TOUg== X-Gm-Message-State: AOAM5310CbEPhJTBubiDR0lkmgANsFWA+OtXf3d7AZbicSUgjuXFQVlp YYDnWh9GKs1DtyG2ttaH+Qd0v8rQH6pMXg== X-Google-Smtp-Source: ABdhPJwhqu2l/zU3AhQobKJUTI8G3WDRRsd45RWfotFRsiLme9gf9Rf7lwdS+fw+gUKtIrGfimTxUg== X-Received: by 2002:a05:6602:2f8c:: with SMTP id u12mr1300272iow.122.1603894728089; Wed, 28 Oct 2020 07:18:48 -0700 (PDT) Received: from [192.168.1.30] ([65.144.74.34]) by smtp.gmail.com with ESMTPSA id u18sm1547471iob.53.2020.10.28.07.18.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 28 Oct 2020 07:18:47 -0700 (PDT) Subject: Re: [PATCH v2 0/4] singly linked list for chains To: Pavel Begunkov , io-uring@vger.kernel.org References: From: Jens Axboe Message-ID: <31af9b88-cc16-f789-767b-30489c33935f@kernel.dk> Date: Wed, 28 Oct 2020 08:18:47 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 10/27/20 5:25 PM, Pavel Begunkov wrote: > v2: split the meat patch. > > I did not re-benchmark it, but as stated before: 5030 vs 5160 KIOPS by a > naive (consistent) nop benchmark that submits 32 linked nops and then > submits them in a loop. Worth trying with some better hardware. Applied for 5.11 - I'll give it a spin here too and see if I find any improvements. But a smaller io_kiocb is always a win. -- Jens Axboe