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helo=mimir.eigenstate.org; client-ip=206.124.132.107 Received: from mimir.eigenstate.org (mimir.eigenstate.org [206.124.132.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tb-mx1.topicbox.com (Postfix) with ESMTPS for <9fans@9fans.net>; Tue, 29 Aug 2023 13:18:14 -0400 (EDT) (envelope-from ori@eigenstate.org) Received: from abbatoir (pool-108-27-53-161.nycmny.fios.verizon.net [108.27.53.161]) by mimir.eigenstate.org (OpenSMTPD) with ESMTPSA id 9715efc2 (TLSv1.2:ECDHE-RSA-AES256-SHA:256:NO) for <9fans@9fans.net>; Tue, 29 Aug 2023 10:18:11 -0700 (PDT) Message-ID: <15AECCB2DF4CE07D4E8FD30E13EF1598@eigenstate.org> To: 9fans@9fans.net Subject: Re: [9fans] /dev/realtime doesn't exist? Date: Tue, 29 Aug 2023 13:18:09 -0400 From: ori@eigenstate.org In-Reply-To: <16933060120.86e7cFDc.27169@composer.9fans.topicbox.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: 0d1fe810-4690-11ee-ab08-88f38d962063 Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UZDBlN2E0ZjczZDFlYWUzYi1NZWY2OTUyY2M3N2IyZjE4MTM0ZmJh?= =?UTF-8?B?ZjY2Pg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:Mef6952cc77b2f18134fbaf66:1:cC8DdjbyVUj_LurBynW0HLl7OkGlq9j64Q2qqFs1dLQ Quoth dusan3sic@gmail.com: > I was reading an article about plan9's realtime scheduler edf (http://doc= .cat-v.org/plan_9/real_time/real_time_in_a_real_operating_system/real_time_= in_a_real_operating_system.pdf, page 7), and they mentioned using /dev/real= time to create realtime processes, but /dev/realtime doesn't exist on my ma= chine (I am using 9front). I found a post here from 07 saying something abo= ut removing it a long time ago, but it got no answers.=20 >=20 > In proc(3) they mention some commands for configuring realtime processes = but I don't know if that is to configure an already made realtime process o= r to make one from a regular. How do i make realtime processes in these day= s? it's the bits you found in /proc; there are no (longer?) any special real time processes; any process can become real time by setting up deadlines at any point. /dev/realtime isn't needed any more. unfortunately, I'm not aware of any programs using it. (that may be a good question for the list: where was the real time scheduler used, and does any code using it survive?) ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Td0e7a4f73d1eae3b-Mef695= 2cc77b2f18134fbaf66 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription