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 E31EEC001B2 for ; Sun, 11 Dec 2022 22:34:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230355AbiLKWd7 (ORCPT ); Sun, 11 Dec 2022 17:33:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56076 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230314AbiLKWdz (ORCPT ); Sun, 11 Dec 2022 17:33:55 -0500 Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0CF52BF58; Sun, 11 Dec 2022 14:33:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=inria.fr; s=dc; h=date:from:to:cc:subject:in-reply-to:message-id: references:mime-version; bh=xKv8eN80SE3N/mAMUDX3qpnzmr8mwGvufEWjp+a7v5k=; b=mw1UiK3x/O5DaWjglFSJv4R7grcPOjULKmh2OMf005v0cU1h+w5/oHWo QnvcxlvTL+e/P1TPk3keoXTRmzZzMpXGhH8ypVEJnP1mLRJeluSJYf3+9 xtUs6nDLGQge6VmL/Mbz+aLrxewblPA+vATiO3OGz+n9YOzXwOymzEV91 Y=; Authentication-Results: mail2-relais-roc.national.inria.fr; dkim=none (message not signed) header.i=none; spf=SoftFail smtp.mailfrom=julia.lawall@inria.fr; dmarc=fail (p=none dis=none) d=inria.fr X-IronPort-AV: E=Sophos;i="5.96,237,1665439200"; d="scan'208";a="82838892" Received: from 214.123.68.85.rev.sfr.net (HELO hadrien) ([85.68.123.214]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Dec 2022 23:33:50 +0100 Date: Sun, 11 Dec 2022 23:33:50 +0100 (CET) From: Julia Lawall X-X-Sender: jll@hadrien To: Tejun Heo cc: torvalds@linux-foundation.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@kernel.org, joshdon@google.com, brho@google.com, pjt@google.com, derkling@google.com, haoluo@google.com, dvernet@meta.com, dschatzberg@meta.com, dskarlat@cs.cmu.edu, riel@surriel.com, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH 14/31] sched_ext: Implement BPF extensible scheduler class In-Reply-To: <20221130082313.3241517-15-tj@kernel.org> Message-ID: References: <20221130082313.3241517-1-tj@kernel.org> <20221130082313.3241517-15-tj@kernel.org> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c > new file mode 100644 > index 000000000000..f42464d66de4 > --- /dev/null > +++ b/kernel/sched/ext.c > @@ -0,0 +1,2780 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright (c) 2022 Meta Platforms, Inc. and affiliates. > + * Copyright (c) 2022 Tejun Heo > + * Copyright (c) 2022 David Vernet > + */ > +#define SCX_OP_IDX(op) (offsetof(struct sched_ext_ops, op) / sizeof(void (*)(void))) > + > +enum scx_internal_consts { > + SCX_NR_ONLINE_OPS = SCX_OP_IDX(init), > + SCX_DSP_DFL_MAX_BATCH = 32, This definition of SCX_DSP_DFL_MAX_BATCH makes the dispatch queue have size 32. The example central policy thus aborts if more than 32 tasks are woken up at once. julia