From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) (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 197CD3B29E for ; Tue, 2 Mar 2021 05:53:59 -0500 (EST) Received: by mail-lf1-x12e.google.com with SMTP id v9so12788811lfa.1 for ; Tue, 02 Mar 2021 02:53:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=/T9a1jloyJuzsgPRiWFJ1ujb4zT3TmqSInae4FZUG9A=; b=F4y4tvPG0eWhfUsbh0rBxx9FWIdEau4S/lHHmgXatSwAbtCFin6+M6HF6hXA9mQuaa Z8o25K56WMAd0cYxWNTQyPR+MNplQ/yoIy8doqczHiXbC9+KWrBIHvvtTwn8iNE/Gp0P VAs+2QtuLNS9xXK5j5W2FQAT8uJ90fBtxiyEUqDauT/5yE1z6L9Hod8s4jaKsZ+MdvdY L2z8FB+wA711kAz+Z/rV3HJ4CYDizaklbycpFwzhTQBlFex5nmPFDBbPYt3cMLl+uHf9 aEY3MpWIoSGZQLedXVSLm9jTC3aLChoHsyTTivXovmMZnFD5wGrn8nLb0zJ0EgcqjXPo YxYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=/T9a1jloyJuzsgPRiWFJ1ujb4zT3TmqSInae4FZUG9A=; b=EuxyOEwnOmKaGf6KO6U0kwTq3xxy0sis7CbFzjp7hanTHtbRS6qmicbIy5SqKrOxTp FgutmEROugC2Y3A+noCQuh6thgid0J0kVFYAuCwX9U6iXo0JACft9BXKlsijknYWK7Ji Kqf6sDKgyEXx46cX0Ryppvve/PUzlFBmKHWwMPIKrpenJfGhOvmqnJGwiifVpmha5LMh 41lS99xNBqlalJLrZ/6gxq91avOVc8d2tD/AHK8/tg3KqQTlFjVFO3hb6KM3TNmhbFIR uHtnD9W0R1CxfzOJHvNoH1Udx51EpHJYhxph8jRg/jRd6K/8fdqVhRmr4SZaXWTX6daH CLLA== X-Gm-Message-State: AOAM531It4VTA8UQfHX1B7BFFVpwSofOclXbKBI5SuRuOFjN52AQ23iT 1bwjZ8QOHWavXMbeJ/ShcCo= X-Google-Smtp-Source: ABdhPJypygZxBAVEgfgl6dlh1cwg9y6sZuq4HPviwIB+th3nrSUFZ6bqS8+LPmoHNOfr+mzRlE8uFQ== X-Received: by 2002:ac2:42cc:: with SMTP id n12mr11701176lfl.560.1614682437864; Tue, 02 Mar 2021 02:53:57 -0800 (PST) Received: from jonathartonsmbp.lan (176-93-29-60.bb.dnainternet.fi. [176.93.29.60]) by smtp.gmail.com with ESMTPSA id j1sm253827lfb.18.2021.03.02.02.53.56 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Mar 2021 02:53:57 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.7\)) From: Jonathan Morton In-Reply-To: Date: Tue, 2 Mar 2021 12:53:56 +0200 Cc: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= , "Mark D." , bloat Content-Transfer-Encoding: quoted-printable Message-Id: References: <87h7mcb6t4.fsf@toke.dk> To: Dave Taht X-Mailer: Apple Mail (2.3445.9.7) Subject: Re: [Bloat] HardenedBSD implementation of CAKE 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: Tue, 02 Mar 2021 10:53:59 -0000 > On 2 Mar, 2021, at 2:59 am, Dave Taht wrote: >=20 > My major doubting point about a port was the > resolution of the kernel clock. Linux has a high quality hirres clock, > BSDs didn't seem capable of scheduling on less than a 1ms tick at the > time I last paid attention. This is actually something Cake's shaper can already cope with. I did = some testing on an ancient PC that didn't have HPET hardware, so timer = interrupts only had 1ms resolution even on Linux. This merely results = in small bursts of traffic at 1ms intervals, which collectively add up = to the configured rate. - Jonathan Morton=