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 A2DB5C25B08 for ; Fri, 5 Aug 2022 17:04:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241014AbiHERE1 (ORCPT ); Fri, 5 Aug 2022 13:04:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240801AbiHEREZ (ORCPT ); Fri, 5 Aug 2022 13:04:25 -0400 Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1C7D78597 for ; Fri, 5 Aug 2022 10:04:24 -0700 (PDT) Received: by mail-il1-x131.google.com with SMTP id r6so1629535ilc.12 for ; Fri, 05 Aug 2022 10:04:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc; bh=ZIUZUvMby+ZyQyN2vJN1//RsIIyzMxAERYvdZ48hCdk=; b=YIEynqiapoixqpHcZWa8r1skf5vp4fTwhH+J/Cy704O4HU99vSjRMr3UerTJI9Kl2w y2zExzgk80ARkfq9Oa1mm8b/ygM3HLHBCGV/9g5/DEglijwACbQ0/waV7pDdb7TKlOL5 9Fo25m5eqTbc+wobpJaCoypLr+O+Vd0QHsx3QiPWKOjfEySCNqeJHD/D95JcGu359bmt UiT2JTzoPNaSQ+T78knE1ZupHEXeEtzrGD8y8YE3kip6+grY8nscqmVqQP5sJSDTah9e YUHvtJfJP14Nck80d9nZjHSRAWpYUgqZXJUVDf4rqKvsNHc2IHC05EaK3KxDiCrliuPi sRdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc; bh=ZIUZUvMby+ZyQyN2vJN1//RsIIyzMxAERYvdZ48hCdk=; b=UQMR4KpM+u+7moc2QrgSA7xFqOVVs4fXkvNl+5vINh/K8p8tr+qobNlBR46trFQZt5 POeKeyaKUdoDasobYJwFg9GWLKBzCAtikbkLUspRkfkL09z+C0nEdUEw2/sVwkGu7T39 KQa8aeTcfDRDaxLSjy8+9tbNTKoVZr4mtzS0C5Xo+IKtiGv1MZvdDlkxVGcJ2sRpgyWv LoPlRdSkTk69M2gNLVM2yS2SZVR+TZJ9SOahRi8v0nVjK52rCrkF0NZfZVoyTT95Z1pv o1xwptpPT/kYkrV50vKSYXEVdplvAYakMP2wDfidX8NxsWQLYaeHId8RdK8RQbUiS9Pi 0yqw== X-Gm-Message-State: ACgBeo2XXXaPr3nljWI1lHDj75Jn2jHojvLynNAO1v1xAokfnkDNJRML CY823dUuO+p6jmxCIsn7HiY/JQ== X-Google-Smtp-Source: AA6agR5xKX/nXXAojsu4XbbnE0kxe6LIuRhdXZFmET/3IRGkXG2CeEEtkygBzNhemE04dhCtVhJraA== X-Received: by 2002:a92:ce50:0:b0:2dd:dc8e:1f36 with SMTP id a16-20020a92ce50000000b002dddc8e1f36mr3729145ilr.34.1659719064178; Fri, 05 Aug 2022 10:04:24 -0700 (PDT) Received: from [192.168.1.172] ([207.135.234.126]) by smtp.gmail.com with ESMTPSA id i21-20020a056638381500b003428115672fsm1888782jav.30.2022.08.05.10.04.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Aug 2022 10:04:23 -0700 (PDT) Message-ID: <78f0ac8e-cd45-d71d-4e10-e6d2f910ae45@kernel.dk> Date: Fri, 5 Aug 2022 11:04:22 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:91.0) Gecko/20100101 Thunderbird/91.10.0 Subject: Re: [PATCH 0/4] iopoll support for io_uring/nvme passthrough Content-Language: en-US To: Kanchan Joshi , hch@lst.de Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, ming.lei@redhat.com, joshiiitr@gmail.com, gost.dev@samsung.com References: <20220805154226.155008-1-joshi.k@samsung.com> From: Jens Axboe In-Reply-To: <20220805154226.155008-1-joshi.k@samsung.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 8/5/22 9:42 AM, Kanchan Joshi wrote: > Hi, > > Series enables async polling on io_uring command, and nvme passthrough > (for io-commands) is wired up to leverage that. > > 512b randread performance (KIOP) below: > > QD_batch block passthru passthru-poll block-poll > 1_1 80 81 158 157 > 8_2 406 470 680 700 > 16_4 620 656 931 920 > 128_32 879 1056 1120 1132 Curious on why passthru is slower than block-poll? Are we missing something here? -- Jens Axboe