Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757298Ab3HLQCJ (ORCPT ); Mon, 12 Aug 2013 12:02:09 -0400 Received: from mga03.intel.com ([143.182.124.21]:7231 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753573Ab3HLQCF (ORCPT ); Mon, 12 Aug 2013 12:02:05 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.89,863,1367996400"; d="scan'208";a="345181763" From: Andi Kleen To: "H. Peter Anvin" Cc: Peter Zijlstra , Steven Rostedt , LKML , gcc , Linus Torvalds , Ingo Molnar , Mathieu Desnoyers , Thomas Gleixner , David Daney , Behan Webster Subject: Re: [RFC] gcc feature request: Moving blocks into sections References: <1375721715.22073.80.camel@gandalf.local.home> <20130812091707.GB27162@twins.programming.kicks-ass.net> <5208F78A.3000708@linux.intel.com> Date: Mon, 12 Aug 2013 09:02:02 -0700 In-Reply-To: <5208F78A.3000708@linux.intel.com> (H. Peter Anvin's message of "Mon, 12 Aug 2013 07:56:10 -0700") Message-ID: <878v06oq2t.fsf@tassilo.jf.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 562 Lines: 18 "H. Peter Anvin" writes: > However, I would really like to > understand what the value is. Probably very little. When I last looked at it, the main overhead in perf currently seems to be backtraces and the ring buffer, not this code. -Andi -- ak@linux.intel.com -- Speaking for myself only -- 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/