From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f170.google.com (mail-oi1-f170.google.com [209.85.167.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6B0C93101DB for ; Sat, 14 Mar 2026 17:09:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773508188; cv=none; b=qQTnsR0o0U6C4QeEAUvwAvCNWBg9q0+I7F7G61TcI7Fd4tK5/ZnZCfpCs1QVR9yegWYteEoiy7kAlzKXg4Fp0DVpdf2AKgZ8l3h53hBpBjRlOF1+cS0egA0GIHYuHmjWZC8tkQn7d3VyqU7EeMtZksuuh3/2oQymtsyA16nCahY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773508188; c=relaxed/simple; bh=KbDbq8LzhtyLbhc/41b7hMLVj+GOORJR4RcSsu++yKg=; h=Message-ID:Date:MIME-Version:Subject:From:To:References: In-Reply-To:Content-Type; b=ISqW5zOlr8+Oys9dAg/qNZZkD/oLXd/KvyHMYUgwF8zsYTLowgno1A/SDDwCFz1CeJ3CE5nGPOXWCdRceaUSZL3iE+BhfPQIvlE9YGy9pBuzc9Cr/+75KI8eA9NJ5UEcLnBXJn1Puz0Z9HIS0NBnu6avHLlvXWxG2Veq93FgtU4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk; spf=pass smtp.mailfrom=kernel.dk; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b=P1GEqLKP; arc=none smtp.client-ip=209.85.167.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.dk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b="P1GEqLKP" Received: by mail-oi1-f170.google.com with SMTP id 5614622812f47-466ebbf7ff7so1129281b6e.1 for ; Sat, 14 Mar 2026 10:09:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1773508184; x=1774112984; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:content-language:references :to:from:subject:user-agent:mime-version:date:message-id:from:to:cc :subject:date:message-id:reply-to; bh=NOcx55gTKm3Y3vuikiSQ8RmjqcTa3AOJczNzUcSvRd4=; b=P1GEqLKPJoePgbCO1hK3zioLC1hHg9WDZOKk+tN2uYN9PvmKg+78HMsSfv0EXHt3o4 T9nmNErSRidfMuffxvEzTYiuc2zccNIG6mXD1WqSGgjcxw6Zm0B4IDoHmOZ1yXMoOz6O 5G68OhzX/h0HZ50mPeb39IpSxSA9z8pjTMUafjWo8zCDOJ4NS6z4DYgs6Ei/HyPigcrh boN+0Q4+ksKXW/eU5nR6BlrVInZ4d1C5G6XSGx81z1L2wklCTqlTP886O3hhWNY3CULB 9MisVX3LX4Y2L18ShKgqyqaKHPSGdAHPBqCOEo9Sp9UCaUK++sI31G7G3tNw9+rhJiAd ZbPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773508184; x=1774112984; h=content-transfer-encoding:in-reply-to:content-language:references :to:from:subject:user-agent:mime-version:date:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=NOcx55gTKm3Y3vuikiSQ8RmjqcTa3AOJczNzUcSvRd4=; b=q4ZXAsnBykI0dFHJq1YGovufDYi1RHrCF5KwOJdFIn0gtPxrp2pTn/dLrIzXsp0RQn Aq0tPBEWR0bKx/v0kP/BJUPg/pAxSY32UX8//oU2z9ud4RG6s+UD4ZQbmgkLwIPwAGhz yST0tiCMSKzvrJ8/1ROz+025hhLBN9vSg3hLMFwGHY9DwpnUWDd4+jVQDUTvTBEqPsqI ljYEztnaqaSUc4R2l8NjytUVrf2RiiuMhKoSbYK3jQSBN6kvG62URmDW/XKA/xfal4QW Ffa07PVAyWlmZ+C8XebnBeLBmB7h5X0fKDslSnBM2W+F4jhW5PQGbELW59ni5EnGGwj/ 2jGA== X-Forwarded-Encrypted: i=1; AJvYcCW6iyY+OSMonXkR023OMh8tr1VYfVmuQA02ChztG4VT+zwGH94bI+L+1B1oahU6+sAPXYd6CA2/taTvzsU=@vger.kernel.org X-Gm-Message-State: AOJu0YxFtdkS59DqUfaFPdNzUIeXgPEEbWrEjIFop/R8VkzUBsvBi2vg rMEuqjSYfEcL6rT28W8sg602Z//y3UbblkQaTSJuh3hzuChMIoUWwwPo6H5ZO45HfMP91uyUrN5 7jNh9uck= X-Gm-Gg: ATEYQzz+ZlaI4N+0qd6La8APyiqIGf7i8FmIlRp3yFsHhlFN60JhgJXz8qNMtfbfbBW PPdMjqcHfe+FBQQfGkqHTXBUCBr+WkfxF3rJ1rJ+gnXfzoNs5okMaPOXdGwSzxvi1X9oLdR7y2e w2tdMB+5xzz5srHJaDCgeawdnrK+2JRz+G+QEkRwy1OyLsVRw/S6NR9ZWNZl0UZSgYS8GEwv10J KNzpvOyWEcUw2g6JCQaRDnq4GSDaMjb5Su249ADseLF46m7ofPi23pgNs29LD3/8c6rXE5K3BFL RqdH28Teh3mzVdlS2ot//a9aNP2KEmT4X1hZPR6GGBSKsTKWG3GztgEAI3gc+sDRjAW4bkEEwbW ILPs0YLE00yKhEnyJsf40tHAaG0Ua0bVSfLodvEYJg7CRecqLP/V80VUJOf8wpNSWX6PYsDsCJu IIhNpT79Bc7kawpYJgB+RFE+wUMWJxg5EMG0QfRH0uDMeQy4NYioODE1DEgqM8zDEB0becWmchT 7VUzjHdgg== X-Received: by 2002:a05:6808:2218:b0:467:143c:7733 with SMTP id 5614622812f47-46757436877mr3747308b6e.46.1773508184405; Sat, 14 Mar 2026 10:09:44 -0700 (PDT) Received: from [192.168.1.150] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-417a2372b13sm8112343fac.10.2026.03.14.10.09.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 14 Mar 2026 10:09:42 -0700 (PDT) Message-ID: <0c0806d0-3fe1-4602-abe1-921b0ba0a853@kernel.dk> Date: Sat, 14 Mar 2026 11:09:41 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/2] io_uring: add IPC channel infrastructure From: Jens Axboe To: Daniel Hodges , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260313130739.23265-1-git@danielhodges.dev> <20260314135053.3334-1-git@danielhodges.dev> <873d56d8-6c1c-447f-ae70-870417c6de5a@kernel.dk> Content-Language: en-US In-Reply-To: <873d56d8-6c1c-447f-ae70-870417c6de5a@kernel.dk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/14/26 10:54 AM, Jens Axboe wrote: > On 3/14/26 7:50 AM, Daniel Hodges wrote: >> On Thu, Mar 13, 2026 at 01:07:37PM +0000, Daniel Hodges wrote: >>> Performance (virtme-ng VM, single-socket, msg_size sweep 64B-32KB): >>> >>> Point-to-point latency (64B-32KB messages): >>> io_uring unicast: 597-3,185 ns/msg (within 1.5-2.5x of pipe for small msgs) >> >> Benchmark sources used to generate the numbers in the cover letter: >> >> io_uring IPC modes (broadcast, multicast, unicast): >> https://gist.github.com/hodgesds/fbcd8bb8497bc0ec2bf1f95244a984fe#file-io_uring_ipc_bench-c >> >> IPC comparison (pipes, unix sockets, shm+eventfd): >> https://gist.github.com/hodgesds/fbcd8bb8497bc0ec2bf1f95244a984fe#file-ipc_comparison_bench-c > > Thanks for sending these, was going to ask you about them. I'll take a > look at your patches Monday. Just a side note since I peeked at a bit - this is using the raw interface? But more importantly, you'd definitely want IORING_SETUP_DEFER_TASKRUN and IORING_SETUP_SINGLE_ISSUER set in those init flags. -- Jens Axboe