From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qv1-xf32.google.com (mail-qv1-xf32.google.com [IPv6:2607:f8b0:4864:20::f32]) (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 8B98B3B29E for ; Thu, 3 Sep 2020 18:14:52 -0400 (EDT) Received: by mail-qv1-xf32.google.com with SMTP id f11so2119484qvw.3 for ; Thu, 03 Sep 2020 15:14:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:reply-to:subject:to:references:cc:message-id:date:user-agent :mime-version:in-reply-to:content-language; bh=yUJNVmrm9/FNXNeZ/X0/PcdA0bd1s3L/tr1vVK7NxZ4=; b=kcZ0byV07IvoP+zzLEOJsnJVXzQq5Wqym2bP7D4PII8THG8UyTITUfz1IfIXkFjCY4 7yFhimGAelIJdFZO5dAbJdVcgA0H0JBVt6nZbJpC0W3O7fDlCzqBpuqFsViQNUMERVyD W/iQT/oohsLZgUrl2wzMolnaHBc4khXYEn0J3FrDtCFsAj6pnXUW8nhxcHJS5siWcJEO eeGfsVZF+t4WpZsGTv6YtF3D22xyBGJkaidPKMsK8Iy2448TSTy6yhez8UROhKV3+lIx P7QNhbFS3XRgNUvcogyNrs1LYIUtMXYQzKx3UddB8scEG1Ux3MKMu5d50+AxaH9cmlW9 qV2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:reply-to:subject:to:references:cc :message-id:date:user-agent:mime-version:in-reply-to :content-language; bh=yUJNVmrm9/FNXNeZ/X0/PcdA0bd1s3L/tr1vVK7NxZ4=; b=H5AqGJo+dOg2j7fcrEVvg1zqFBGp4VNBX6jT4i9jhJPUYZFUwu++Uz4keSyg2MFOqN 1ndzpOTeoWJejxr7Ui+ozcGwH7hnFIQNRtkdeI0Q0/MplVnVFGfN5r19o9gqugCCeKe7 Lj5+G/pKzNTwg0ywQ4mi2p9BYe+S1/rhbbbgOHIGZtrwUu7dc5cRnrIJQfam+s59+sE/ fq0Od+kd+NiUqffXV0LzErIghzNhVDdMmaG0+5zPQD49RprmtmMYYFAuRhzj+lKgepZx ZamPPjqB+aq5uUG+gO80qDwoMkH5bsUgbpoyyWbqM8ow5IAt0uAc5mqasuYqK/BGG8AW EpTQ== X-Gm-Message-State: AOAM530fA2Ue5Fcdv4uS9mbIwcS3K9SdCPGfZRKlDde0nPrHRcieUBKa ipXH4W75XZGq1ZKLG7cZwVDqVOL2yvg= X-Google-Smtp-Source: ABdhPJwy/6EID0k2iw71a5IFjrkQFQzmhMUxtjY3GJX7AC+W5B8KUnafWn5PN3R5jyUQn/JrBQE4kw== X-Received: by 2002:a05:6214:292:: with SMTP id l18mr3993307qvv.3.1599171291944; Thu, 03 Sep 2020 15:14:51 -0700 (PDT) Received: from ?IPv6:2607:fea8:561f:e34d::966b? ([2607:fea8:561f:e34d::966b]) by smtp.gmail.com with ESMTPSA id k63sm3068332qkf.33.2020.09.03.15.14.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Sep 2020 15:14:51 -0700 (PDT) From: David Collier-Brown X-Google-Original-From: David Collier-Brown Reply-To: davecb@spamcop.net To: =?UTF-8?Q?Toke_H=c3=b8iland-J=c3=b8rgensen?= References: <87mu2bjbf8.fsf@toke.dk> <5DBFB383-13E8-4587-BE49-1767471D7D59@jonathanfoulkes.com> <87r1rliiiw.fsf@toke.dk> <07CD4278-D448-49D2-AC73-9C230EC041DE@jonathanfoulkes.com> <87imcxi4mq.fsf@toke.dk> <877dtbgcc6.fsf@toke.dk> Cc: bloat@lists.bufferbloat.net Message-ID: <8c4212c4-3acb-6616-d9a2-6bef7e65bbad@rogers.com> Date: Thu, 3 Sep 2020 18:14:49 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <877dtbgcc6.fsf@toke.dk> Content-Type: multipart/alternative; boundary="------------E6C57DC974DCF4B7D7799673" Content-Language: en-US Subject: [Bloat] Other CAKE territory (was: CAKE in openwrt high CPU) 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: Thu, 03 Sep 2020 22:14:52 -0000 This is a multi-part message in MIME format. --------------E6C57DC974DCF4B7D7799673 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit On 2020-09-03 10:32 a.m., Toke Høiland-Jørgensen via Bloat wrote > Yeah, offloading of some sort is another option, but I consider that > outside of the "CAKE stays relevant" territory, since that will most > likely involve an entirely programmable packet scheduler. There was some > discussion of adding such a qdisc to Linux at LPC[0]. The Eiffel[1] > algorithm seems promising. > > -Toke I'm wondering if edge servers with 1Gb NICs are inside the "CAKE stays relevant" territory? My main customer/employer has a gazillion of those, currently reporting ** *qdisc mq 0: root* * qdisc pfifo_fast 0: parent :8 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 ... * because their OS is just a tiny bit elderly (;-)). We we're planning to roll forward this quarter to centos 8.2, where CAKE is an option. It strikes me that the self-tuning capacity of CAKE might be valuable for a whole /class/ of small rack-mounted machines, but you just mentioned the desire for better multi-processor support. Am I reaching for the moon, or is this something within reach? --dave -- -- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb@spamcop.net | -- Mark Twain --------------E6C57DC974DCF4B7D7799673 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

On 2020-09-03 10:32 a.m., Toke Høiland-Jørgensen via Bloat wrote 

Yeah, offloading of some sort is another option, but I consider that
outside of the "CAKE stays relevant" territory, since that will most
likely involve an entirely programmable packet scheduler. There was some
discussion of adding such a qdisc to Linux at LPC[0]. The Eiffel[1]
algorithm seems promising.

-Toke

I'm wondering if edge servers with 1Gb NICs are inside the "CAKE stays relevant" territory? 

My main customer/employer has a gazillion of those, currently reporting

qdisc mq 0: root

qdisc pfifo_fast 0: parent :8 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1

...

because their OS is just a tiny bit elderly (;-)). We we're planning to roll forward this quarter to centos 8.2, where CAKE is an option.

It strikes me that the self-tuning capacity of CAKE might be valuable for a whole class of small rack-mounted machines, but you just mentioned the desire for better multi-processor support.

Am I reaching for the moon, or is this something within reach?

--dave

-- 
-- 
David Collier-Brown,         | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
davecb@spamcop.net           |                      -- Mark Twain
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