From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Hounschell Subject: Re: timer signal loss on RT Date: Sat, 10 Mar 2012 06:53:31 -0500 Message-ID: <4F5B40BB.9080305@cfl.rr.com> References: <4F5B2C50.2090907@cfl.rr.com> Reply-To: dmarkh@cfl.rr.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-kernel-rt , Mark Hounschell To: Thomas Gleixner Return-path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120]:22632 "EHLO cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752484Ab2CJLxd (ORCPT ); Sat, 10 Mar 2012 06:53:33 -0500 In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 03/10/2012 06:34 AM, Thomas Gleixner wrote: > 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. > Does ksoftirqd deliver timer signals in vanilla? Thanks Mark