From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 38B213B2A4 for ; Sat, 28 Jan 2023 14:13:45 -0500 (EST) Received: by mail-wm1-x331.google.com with SMTP id q8so5556846wmo.5 for ; Sat, 28 Jan 2023 11:13:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:to:subject:message-id:date:from :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=ps7H5dNHdJ2aqchbGjgrbQ4x7H6zS6oigdXa0tYgSuk=; b=bY65GZSR5iN2K4jFHKYFeMRuRATOC8YHKHp8XN4eqkLviJEyRTb8wz7GKccPfzp/As 0lfpzMEDk1NfIpOdxWAQDTBNz6ueaLGre6jrCMEq47j1n+agdZ8xXDLxBn9QhqhCgfoY 9XsVLEpRig3o83tuV9RAbBdbqBcrrRB9sd75nb4TvNvk/n27qTy3mQrb7Ur/XMh0Ho6k OteD9FlEGNxAlJEx8wRtvdFEV05BmMcaulcsoU7/SZTdIH43U6qm+UQ8YxEpADCcDvg3 PuhrCI0mwnZ6P8TKsZ9mUzHfGLnh2yQPJJC0lV3iBqoeTN1zN5Krnt0yBWLsesy23qmO gw5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:to:subject:message-id:date:from :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ps7H5dNHdJ2aqchbGjgrbQ4x7H6zS6oigdXa0tYgSuk=; b=n6bmv2YIwFQ7hNCY50YSahZWRZLTIxYmWYvfV6OgDQ744aevJ8Jf+SdiM9ZRfuJ/OF C7V1fsgELQjYISRAYn+GcD3vpBeuv7xrLjxnKabsZ0C8n32ezWZh6XZIdDb1ACCfP01S w0VEhD+rM7IJ3sJoIaYzGlgCaXn15xDYioSa+13Wz2rwqeUHURBxeeok8D8PKmcT7GXs ap1Ld3R6SvmrXZclR9Kpr0Sdw8N+jETzPXvanTiS8GMpR/jICUQg2+rN9WWKKnqD3HW9 LsFJBrTFSPNY9JCSi9Y38BU2yVc0+qVFzBgLRQsfwESqbrz3ZttxMRap8vPUDTvz73Qe Eg9w== X-Gm-Message-State: AO0yUKUMadE7SnLLym0jD1XhWue5ESwVJabBWXy2I1uopPU06JEDnJFk prTxV5NBEgUf2EUm1ItPxLlzIXequgktwZKTN1lyJltwyoo= X-Google-Smtp-Source: AK7set8UNm+RhXq8yWQAk6MPXsnfqZFBMfmnthCB/KqxfE43kP4emMEDi5qydUMQH2V5hG6MC030Ui9qL77SmN1Ziek= X-Received: by 2002:a05:600c:a694:b0:3dc:51e5:45d3 with SMTP id ip20-20020a05600ca69400b003dc51e545d3mr27119wmb.138.1674933223408; Sat, 28 Jan 2023 11:13:43 -0800 (PST) MIME-Version: 1.0 From: Dave Taht Date: Sat, 28 Jan 2023 11:13:30 -0800 Message-ID: To: bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Bloat] The amazon firecracker micro-vm TCP implementation... X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Jan 2023 19:13:45 -0000 has no congestion controls. I was hearing some good things about the overall microvm concept (see here: https://firecracker-microvm.github.io/ ) so I briefly took a look at the code. /// The current implementation does not do any kind of congestion control, expects segments to /// arrive in order, triggers a retransmission after the first duplicate `ACK`, and relies on the /// user to supply an opaque `u64` timestamp value when invoking send or receive functionality. The /// timestamps must be non-decreasing, and are mainly used for retransmission timeouts. https://github.com/firecracker-microvm/firecracker/blob/main/src/dumbo/src/= tcp/connection.rs#L148 --=20 This song goes out to all the folk that thought Stadia would work: https://www.linkedin.com/posts/dtaht_the-mushroom-song-activity-69813666656= 07352320-FXtz Dave T=C3=A4ht CEO, TekLibre, LLC