From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34C46C77B73 for ; Fri, 26 May 2023 16:11:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244244AbjEZQLA (ORCPT ); Fri, 26 May 2023 12:11:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237120AbjEZQK4 (ORCPT ); Fri, 26 May 2023 12:10:56 -0400 Received: from mail-qk1-x735.google.com (mail-qk1-x735.google.com [IPv6:2607:f8b0:4864:20::735]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 607901A2 for ; Fri, 26 May 2023 09:10:52 -0700 (PDT) Received: by mail-qk1-x735.google.com with SMTP id af79cd13be357-75b0f2ce4b7so60489985a.2 for ; Fri, 26 May 2023 09:10:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bitbyteword.org; s=google; t=1685117451; x=1687709451; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=cgIUzMFd0Wu4Ol9oHyv7Wf8bNpCQi48RTzTuWdj5viQ=; b=bMK3rSXUcwt/oyxOni/E1+aDrCvO8uQNH3a669+1l1G1buZyt4hmjxrxaQ9zyDYq0q 3OJqmCIi9C1NJDTgt2RukX+DYxLTdJWJdhwAApMmf4CeM5Vx9uhxTahqdBdTePQrJzjU 4vCLt5ttYoIYkO2vEX/QgG9TlpwKR28aP0Dp2qZoc2lDpu8Sy06WNbYOWQIpceVB+gEi iMcr68y4vy+xc2rr38ckDu2WusHEOJ/s+Q/b0eJQazEANf6QSgI1SLgsqBHQEte+1e7T aWL4cSYlBdmgq6Ud75RLBbQXE8icxar8Km59ZZ+MqZINkNY4Rp9/CuYOOH9qzmd4CxSq 4bsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685117451; x=1687709451; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=cgIUzMFd0Wu4Ol9oHyv7Wf8bNpCQi48RTzTuWdj5viQ=; b=FGX2MO5nSGDxMpC6M/iDTBNh2q9W6Rh2tgNm054RAz74Xo6OUz1ZihZJY6/qk44Elo riJoKVZki6hCb0s5Bi3xV8Lvfasf8LfvwCw/tKqulb+9c0A8cRcUPkqX0JkbZT3qKgko fD1H+kIaC6/9oW64MUXzMZjvInwSy5jdJMIYpH/Vd3aH5CxFZ1VtvaBHbFfDp/ZYWEKB /DXKM/lC7CvZkGwcadeLktp69Ack/xX/fabfvhFSw7QE4mnxVQfcagMKRK8mMWV6jsPW F2QoHhjxYIdKvBIo3PHUOlQ9qtgdxr0MBJR5FOsDVA1jmVnRgBe+1EPjzpBPdI/qbjNC 9RmQ== X-Gm-Message-State: AC+VfDwk2HB1iZvpcuUzXAAXmN/1Hf+7rt1K3Q5Ipy6R5AfjlSiz1Rbr gkChU96NUJGAIRtuXTrHrwHAhQ== X-Google-Smtp-Source: ACHHUZ4+9YD+0XkjiRj7Leu8WRGwVaahM3SelZvLtApMojXLJADrIKSe/xMOJp+1TvDqXUmUNiZVfA== X-Received: by 2002:a05:6214:c8d:b0:61b:5cba:5820 with SMTP id r13-20020a0562140c8d00b0061b5cba5820mr1886177qvr.50.1685117451360; Fri, 26 May 2023 09:10:51 -0700 (PDT) Received: from vinz16.lan (c-73-143-21-186.hsd1.vt.comcast.net. [73.143.21.186]) by smtp.gmail.com with ESMTPSA id l12-20020a056214028c00b0061b608dc4c1sm1303256qvv.94.2023.05.26.09.10.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 May 2023 09:10:51 -0700 (PDT) From: Vineeth Pillai To: luca.abeni@santannapisa.it, Juri Lelli , Daniel Bristot de Oliveira , Peter Zijlstra , Ingo Molnar , Vincent Guittot , Steven Rostedt , Joel Fernandes , youssefesmat@google.com, Dietmar Eggemann , Ben Segall , Mel Gorman , Valentin Schneider Cc: Vineeth Pillai , Jonathan Corbet , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v4 2/2] sched/deadline: Update GRUB description in the documentation Date: Fri, 26 May 2023 12:10:45 -0400 Message-Id: <20230526161045.2283530-1-vineeth@bitbyteword.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230526145519.2282062-2-vineeth@bitbyteword.org> References: <20230526145519.2282062-2-vineeth@bitbyteword.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Update the details of GRUB to reflect the updated logic. Signed-off-by: Vineeth Pillai (Google) --- Documentation/scheduler/sched-deadline.rst | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/scheduler/sched-deadline.rst b/Documentation/scheduler/sched-deadline.rst index 9d9be52f221a..d9f9f10c2191 100644 --- a/Documentation/scheduler/sched-deadline.rst +++ b/Documentation/scheduler/sched-deadline.rst @@ -203,12 +203,15 @@ Deadline Task Scheduling - Total bandwidth (this_bw): this is the sum of all tasks "belonging" to the runqueue, including the tasks in Inactive state. + - Maximum usable bandwidth (max_bw): This is the maximum bandwidth usable by + deadline tasks and is currently set to the RT capacity. + The algorithm reclaims the bandwidth of the tasks in Inactive state. It does so by decrementing the runtime of the executing task Ti at a pace equal to - dq = -max{ Ui / Umax, (1 - Uinact - Uextra) } dt + dq = -(max{ Ui, (Umax - Uinact - Uextra) } / Umax) dt where: -- 2.40.1