From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf1-x133.google.com (mail-lf1-x133.google.com [IPv6:2a00:1450:4864:20::133]) (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 1E6E43B2A4 for ; Mon, 11 Mar 2019 11:53:44 -0400 (EDT) Received: by mail-lf1-x133.google.com with SMTP id h71so3825754lfe.0 for ; Mon, 11 Mar 2019 08:53:44 -0700 (PDT) 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=XWZuTQZc8pXGIrSsPOlxZbxPFY89Yx6cVoXAc6xR/PU=; b=cqeMLEUYT9cQwZcDGXb6ZMJfsLzrhGtfZj2DL0AQK59wt0sfUQDv3sU2Z1E8oQsUAH hnurXM9XYuYDz69wICfEnxHaxyoLsAkC97dalQMGoEaTf/FXtpfUl0IDNkBDiYVfT23R AEZo5s2Klq+lcBxk001rahawdFJC3z8Z5Yd4yiMnYBkErbYre5qxQL1McrzxDmsMXWAi R1ySK+t32b8VDIhie6Gjmga9IcRV0gbLRwtWe0ZC62i48lSpEHnLmDCKZ7qCMjJtC+LO 6PNowfjWHMU3gzeVt2rdwM8xhwkMd/6shFNdl/8SKgLIyIfBsK7u6lJRSSZswNIDEHkI wRsw== 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=XWZuTQZc8pXGIrSsPOlxZbxPFY89Yx6cVoXAc6xR/PU=; b=tfXR9xm9BqBIGOBJKvOGOW1VAgdalHMbP/UtnhQJiVHOvTBNCFjLHax8/szY568wF7 iAdfs+TQGNOojIHA3s7daw2TISXaYIpZ0eYffIqJMLABfe1HeRHhO2R6SU88yFCWqcGh 6+0hoO8uH/tMBV7ZC2V9MQfZ5uiDYD5gJsjrNiSJyH75gMq4tBrYmiQfUMYLl4iW0r0E p9X+QKIBofy88qqJtj+BRjmHHFE+EQv3Pfb9z9nCYg9bMXk99FLUpa9DgqF2wq/Z6t6n wz5xjUAqZhB+ZxQgv2ldU/n7SoeRQeNRyv6HQKGZ5NrQGf4U79I0yQMufsai2he6MMmn hTUw== X-Gm-Message-State: APjAAAV83Olfc5mgrX71bO7O9WyIqwyQedbuUmyjbyUe6Zdv2dRC06N2 uPmVUW6tXqLG11a/PLB0b/8= X-Google-Smtp-Source: APXvYqyE1OR/mXejDouCMo9YXDm2LtGsI2/vWBCLlXyJbo7/fmpq4U1tRwqDsXOLST6gD7X2b5STZA== X-Received: by 2002:a19:c314:: with SMTP id t20mr731779lff.114.1552319622911; Mon, 11 Mar 2019 08:53:42 -0700 (PDT) Received: from jonathartonsmbp.lan (83-245-235-245-nat-p.elisa-mobile.fi. [83.245.235.245]) by smtp.gmail.com with ESMTPSA id n7sm1000233ljj.71.2019.03.11.08.53.41 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 Mar 2019 08:53:42 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Jonathan Morton In-Reply-To: Date: Mon, 11 Mar 2019 17:53:40 +0200 Cc: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= , Cake List Content-Transfer-Encoding: quoted-printable Message-Id: <5CBE005F-62B8-41F0-9EB9-7EE80ADF6674@gmail.com> References: <87wol83uio.fsf@toke.dk> To: Adrian Popescu X-Mailer: Apple Mail (2.3445.9.1) Subject: Re: [Cake] profiling using perf X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Mar 2019 15:53:44 -0000 > On 11 Mar, 2019, at 4:49 pm, Adrian Popescu = wrote: >=20 > This doesn't mean cake is poorly optimized or poorly > implemented. It's not a good fit for small embedded systems with small > CPU caches. More importantly, how much CPU time is spent elsewhere than in = sch_cake.c? I suspect there's a lot of overhead that we have only = indirect control over. - Jonathan Morton