Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756693Ab0ANJX4 (ORCPT ); Thu, 14 Jan 2010 04:23:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756642Ab0ANJXx (ORCPT ); Thu, 14 Jan 2010 04:23:53 -0500 Received: from one.firstfloor.org ([213.235.205.2]:51731 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756554Ab0ANJXv (ORCPT ); Thu, 14 Jan 2010 04:23:51 -0500 Date: Thu, 14 Jan 2010 10:23:50 +0100 From: Andi Kleen To: Joshua Pincus Cc: Andi Kleen , Frederic Weisbecker , "K.Prasad" , peterz@infradead.org, paulus@samba.org, acme@redhat.com, linux-kernel@vger.kernel.org Subject: Re: HW breakpoints perf_events request Message-ID: <20100114092350.GF12241@basil.fritz.box> References: <87ljg1fn3u.fsf@basil.nowhere.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 608 Lines: 15 > We would like to avoid using ptrace at all costs. > It requires us to have a parent thread running > which monitors all the others. It's not clear that > the wait() call by the parent doesn't mask a barrage > of signals from various threads and the performance mask? It'll report them. You expect to have so many signals that this would be a problem? -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/