From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-x532.google.com (mail-ed1-x532.google.com [IPv6:2a00:1450:4864:20::532]) (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 496F23B29D for ; Sat, 18 Feb 2023 15:13:26 -0500 (EST) Received: by mail-ed1-x532.google.com with SMTP id ez14so4880291edb.1 for ; Sat, 18 Feb 2023 12:13:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=perens.com; s=google; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=SckPsMDL1y0YM3NJJErEfW3z8kGPez8VXOaLTP2PzU8=; b=XKj2eHK0EPwVbJoeaUu6PXJfkaZI3s10aq/u3mRBsiXTmMDTzrev4b387RB5+tQYu8 3IYklASdgyXYHa9nc4XynGqjEV2BzCs7OpdaqyCBl3IgYj1d2+/OAiju9WdIHaZYAHXz AK7RFKCvpRZKTyJLopyMKsFKXcgMLi/9F6Z8M= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=SckPsMDL1y0YM3NJJErEfW3z8kGPez8VXOaLTP2PzU8=; b=3GA8b2ZCrk+8kTkE/XjCfsUYb+oLq8qzAFJvX8NYoLo/iNYhsgpfpg62oOY9tOlGxy E2ynsBswxABVKXVEH/Ibof5diQWSLyykFnQQ06t2fi/Pj6nm8VOWZ5CP7BU+J2kdDFxJ IdV6UoG584CFPpID+UrOy0LvOc/Gtt0MhEfO3fFLweISgp/LXXkPFwQKE/OI8zhN9EdX oamkTc0bRpXiEsw/srz0Hy1iRXNSU/c658Vj9oqZ7ufosR5nzzoZnJMOaklBP8MAuLcW BcaNA3KPVwI5Q4USj4yD1mp+xHzKNmXaJpcusjYoSqtK4Gv8jZj38kXlksoWPNuaCLGA KaFw== X-Gm-Message-State: AO0yUKUd/mhbeH7mdg3Qy5/wd+N5WYF3aLwPWqm7nvR6XHvtYcAD1Dh+ MyXkVAeWWCKrI5RAT+bbJHWe+gRTEa6PX33rCcyt5w== X-Google-Smtp-Source: AK7set9Jt9XszW62Hv1xjLencOjfyTU0e1lTicvcHF8bCnTHWIbM8l9TtY2Cv6bT2LCSwGoti3NYAZqwi/nDcArQyQA= X-Received: by 2002:a50:9fc7:0:b0:4ac:b8aa:3ffc with SMTP id c65-20020a509fc7000000b004acb8aa3ffcmr465163edf.4.1676751204685; Sat, 18 Feb 2023 12:13:24 -0800 (PST) MIME-Version: 1.0 References: <09f3a84a-c48b-5709-c32b-9bf6cdcd0b3f@auckland.ac.nz> <20200.1676648584@localhost> <59d5e2b7-ee1e-9019-fb98-3a81fd8bf545@auckland.ac.nz> <9o926n83-59qp-2p27-459r-q66n48s58n1n@ynat.uz> In-Reply-To: From: Bruce Perens Date: Sat, 18 Feb 2023 12:13:13 -0800 Message-ID: To: Ulrich Speidel Cc: David Lang , "starlink@lists.bufferbloat.net" Content-Type: multipart/alternative; boundary="000000000000eeaffb05f4ff0f8e" Subject: Re: [Starlink] Starlink power use & satellite tracking X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 Feb 2023 20:13:26 -0000 --000000000000eeaffb05f4ff0f8e Content-Type: text/plain; charset="UTF-8" On Sat, Feb 18, 2023 at 4:36 AM Ulrich Speidel via Starlink < starlink@lists.bufferbloat.net> wrote: > But now it's within the official specs of 40-75 W most of the > time, and it's changed this week. This can be an operating system change implementing low-power sleep when the system is idle. Often it doesn't happen during initial development. Hopefully the dish OS is shared with the military and commercial users, where this can be more important than it is for most residential use. There's a trick I learned while developing embedded devices. Connect an oscilloscope across a current shunt feeding the device. You will generally see the CPU scheduling clock tick at 100 Hz or so, and other periodic power drains. Thanks Bruce --000000000000eeaffb05f4ff0f8e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Sat, Feb 18, 2023 at 4:36 AM Ulric= h Speidel via Starlink <starlink@lists.bufferbloat.net> wrote:
But now it's within the official specs= of 40-75 W most of the
time, and it's changed this week.

This = can be an operating system change implementing low-power sleep when the sys= tem is idle. Often it doesn't happen during initial development. Hopefu= lly the dish OS is shared with the military and commercial users, where thi= s can be more important than it is for most residential=C2=A0use.

There's a trick I learned while developing embedded dev= ices. Connect an oscilloscope across a current shunt feeding the device. Yo= u will generally see the CPU scheduling clock tick at 100 Hz or so, and oth= er periodic power drains.

=C2=A0 =C2=A0 Thanks

=C2=A0 =C2=A0 Bruce
--000000000000eeaffb05f4ff0f8e--