From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264833AbUGIKRc (ORCPT ); Fri, 9 Jul 2004 06:17:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265009AbUGIKRc (ORCPT ); Fri, 9 Jul 2004 06:17:32 -0400 Received: from mx1.elte.hu ([157.181.1.137]:18386 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S264833AbUGIKRb (ORCPT ); Fri, 9 Jul 2004 06:17:31 -0400 Date: Fri, 9 Jul 2004 12:17:33 +0200 From: Ingo Molnar To: Con Kolivas Cc: Andrew Morton , Nick Piggin , linux kernel mailing list Subject: Re: Likelihood of rt_tasks Message-ID: <20040709101733.GA19011@elte.hu> References: <40EE6CC2.8070001@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <40EE6CC2.8070001@kolivas.org> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Con Kolivas wrote: > While rt tasks are normally unlikely, what happens in the case when > you are scheduling one or many running rt_tasks and the majority of > your scheduling is rt? Would it be such a good idea in this setting > that it is always hitting the slow path of branching all the time? it's really not that big of an issue to hit the 'slow' path. And if it is that common then the BTB of the CPU ought to cover it just fine. Ingo