From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: timer signal loss on RT Date: Sat, 10 Mar 2012 12:34:00 +0100 (CET) Message-ID: References: <4F5B2C50.2090907@cfl.rr.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: linux-kernel-rt , Mark Hounschell To: Mark Hounschell Return-path: Received: from www.linutronix.de ([62.245.132.108]:48748 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752049Ab2CJLeC (ORCPT ); Sat, 10 Mar 2012 06:34:02 -0500 In-Reply-To: <4F5B2C50.2090907@cfl.rr.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Sat, 10 Mar 2012, Mark Hounschell wrote: > I'm sure you can find many things wrong with this test case but I'm not > sending it for discussion on the merits, or certainly the lack of, an > application that contains a cpu hog, but only to show what I think is a > problem with RT kernels. Nope, PEBKAC. Timer signals are delivered via ksoftirqd, so your cpu hog prevents ksoftirqd frum running. Thanks, tglx