From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 008.lax.mailroute.net (008.lax.mailroute.net [199.89.1.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B73A013441C; Thu, 21 Mar 2024 19:52:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711050758; cv=none; b=hXefctsERmg/rGDyIKgzQwEmT5ao/aFovphGLwvbltkayWXAG4rJRCM9elGHW4BtlJeP+V3iKtBnKBo9LYdzgQS6IkDPVqzlZTsEVZBPMW+/txRGkRBIKRq3WtBf4x1U8FanB/qmQonhWHsonyP0/UT4r751n8SzWQ3G8/vL7O8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711050758; c=relaxed/simple; bh=x9bF2GlKwBQBROkfQn8ZkL7g6dXhyRklXjeoJ7+o78Q=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=digEmqud/333ip89ZWFL+akeJYEsI6svcZK1rTirFmnTYZ3UPUt1J+gIBiwzd4uhtgDaT3Hn7SeKnAz2x1E+KFjnJSAHNC8l9IxmVFXK/eeJR0+sNlpHwRW6uXHJIU8mLJmvIhXhmeAQIzNqOZaLBospZWYBwGoHOkIO8+P9Kv0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=qNIH0Hs0; arc=none smtp.client-ip=199.89.1.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="qNIH0Hs0" Received: from localhost (localhost [127.0.0.1]) by 008.lax.mailroute.net (Postfix) with ESMTP id 4V0x2648xpz6Cnk8t; Thu, 21 Mar 2024 19:52:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:content-type:content-type:in-reply-to :from:from:references:content-language:subject:subject :user-agent:mime-version:date:date:message-id:received:received; s=mr01; t=1711050744; x=1713642745; bh=x9bF2GlKwBQBROkfQn8ZkL7g 6dXhyRklXjeoJ7+o78Q=; b=qNIH0Hs0SVRamEYXBAlL3R8NxsWmvf0F4PHIjKf0 F60nOEwPPcs2nTqPPLGPAeHFPtUzTP6Gn/OMprkUlSoJNy9qyrZ8EQP9EEbKbDE3 fzs1DTU8ZQ9+lUVJySklU4z4ygGuvWVyGt7wdARk8OSbRif15zuiBgLWp7TybU3x SHFhiEEKk5utahJQerMtwOg/siqOA/ra7Dv0RUUsykNAop28QxZ9yiN9XwThYUNR h3/qESF2JBeIi/VOWiSVka58EbJP8YElNcTrBbA1FAAuHrVOAPItSZZSCv//fA+1 VJc9C1fmGJfgByVbHanmDRv0f5BxU3hZK8bUKEbHUhHPUA== X-Virus-Scanned: by MailRoute Received: from 008.lax.mailroute.net ([127.0.0.1]) by localhost (008.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id daY4BxjVFOom; Thu, 21 Mar 2024 19:52:24 +0000 (UTC) Received: from [100.96.154.173] (unknown [104.132.1.77]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 008.lax.mailroute.net (Postfix) with ESMTPSA id 4V0x1w433Qz6Cnk8s; Thu, 21 Mar 2024 19:52:20 +0000 (UTC) Message-ID: <2ed2dadc-bdc4-4a21-8aca-a2aac0c6479a@acm.org> Date: Thu, 21 Mar 2024 12:52:19 -0700 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/2] Introduce per-task io utilization boost Content-Language: en-US To: Christian Loehle , Qais Yousef Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, juri.lelli@redhat.com, mingo@redhat.com, rafael@kernel.org, dietmar.eggemann@arm.com, vschneid@redhat.com, vincent.guittot@linaro.org, Johannes.Thumshirn@wdc.com, adrian.hunter@intel.com, ulf.hansson@linaro.org, andres@anarazel.de, asml.silence@gmail.com, linux-pm@vger.kernel.org, linux-block@vger.kernel.org, io-uring@vger.kernel.org, linux-mmc@vger.kernel.org References: <20240304201625.100619-1-christian.loehle@arm.com> <86f0af00-8765-4481-9245-1819fb2c6379@acm.org> <0dc6a839-2922-40ac-8854-2884196da9b9@arm.com> <2784c093-eea1-4b73-87da-1a45f14013c8@arm.com> <20240321123935.zqscwi2aom7lfhts@airbuntu> <1ff973fc-66a4-446e-8590-ec655c686c90@arm.com> From: Bart Van Assche In-Reply-To: <1ff973fc-66a4-446e-8590-ec655c686c90@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/21/24 10:57, Christian Loehle wrote: > In the long-term it looks like for UFS the problem will disappear as we are > expected to get one queue/hardirq per CPU (as Bart mentioned), on NVMe that > is already the case. Why the focus on storage controllers with a single completion interrupt? It probably won't take long (one year?) until all new high-end smartphones may have support for multiple completion interrupts. Thanks, Bart.