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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00A83C0650E for ; Mon, 1 Jul 2019 14:05:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BE8442173E for ; Mon, 1 Jul 2019 14:05:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="WtVTo9Em" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729347AbfGAOFN (ORCPT ); Mon, 1 Jul 2019 10:05:13 -0400 Received: from merlin.infradead.org ([205.233.59.134]:35486 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729294AbfGAOFN (ORCPT ); Mon, 1 Jul 2019 10:05:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=SotD5xDKU4tAQXDc312orTzyiKC6J1IO6NGGg0le4bM=; b=WtVTo9Em9Pu8gmifFDUAIT37b vcWRO1Kssa1aPIOcf/s/1IwKqmzznPjIajojzRLdV7Usylbqe6kxR3S6FZG4KxQdWxSxs7n+AK4lK 1E1+KTlvd35g37f9qOh37+gtYxwOu79XifNjm7TRzoe9KptSYlo2A0X0vurGj5D85zn75ffm+lLlt enza0nWDc4d6eU61HQDPd5FrcVZdCAl53MUU6OV0libZZA51syAu8S21ixjyYSZcDjYMoug3qnKvE ICrIJSnP7quBALtKcZlt8zDeR/L2Hl+Bh4yMT37J7mMhqDaXa6QTzXFRrlQlJqW6uxzA5pJ8KZl7J Etk0Tv9xQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hhwv7-0008G4-L9; Mon, 01 Jul 2019 14:04:37 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 84A2A209C957E; Mon, 1 Jul 2019 16:04:34 +0200 (CEST) Date: Mon, 1 Jul 2019 16:04:34 +0200 From: Peter Zijlstra To: Patrick Bellasi Cc: subhra mazumdar , linux-kernel@vger.kernel.org, mingo@redhat.com, tglx@linutronix.de, steven.sistare@oracle.com, dhaval.giani@oracle.com, daniel.lezcano@linaro.org, vincent.guittot@linaro.org, viresh.kumar@linaro.org, tim.c.chen@linux.intel.com, mgorman@techsingularity.net, Paul Turner , riel@surriel.com, morten.rasmussen@arm.com Subject: Re: [RESEND PATCH v3 0/7] Improve scheduler scalability for fast path Message-ID: <20190701140434.GW3402@hirez.programming.kicks-ass.net> References: <20190627012919.4341-1-subhra.mazumdar@oracle.com> <20190701090204.GQ3402@hirez.programming.kicks-ass.net> <20190701135552.kb4os6bxxhh2lyw6@e110439-lin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190701135552.kb4os6bxxhh2lyw6@e110439-lin> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 01, 2019 at 02:55:52PM +0100, Patrick Bellasi wrote: > On 01-Jul 11:02, Peter Zijlstra wrote: > > Some of the things we could tie to this would be: > > > > - select_idle_siblings; -nice would scan more than +nice, > > Just to be sure, you are not proposing to use the nice value we > already have, i.e. > p->{static,normal}_prio > but instead a new similar concept, right? Correct; a new sched_attr::sched_latency_nice value, which is like sched_nice, but controls a different dimmension of behaviour.