From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11775 invoked by alias); 10 Jun 2010 17:28:13 -0000 Received: (qmail 11763 invoked by uid 22791); 10 Jun 2010 17:28:11 -0000 X-SWARE-Spam-Status: No, hits=-5.8 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 10 Jun 2010 17:28:06 +0000 Received: from int-mx04.intmail.prod.int.phx2.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.17]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o5AHRoFp012973 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 10 Jun 2010 13:27:51 -0400 Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx04.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o5AHRoRL016914; Thu, 10 Jun 2010 13:27:50 -0400 Received: from opsy.redhat.com (ovpn01.gateway.prod.ext.phx2.redhat.com [10.5.9.1]) by ns3.rdu.redhat.com (8.13.8/8.13.8) with ESMTP id o5AHRmkd017098; Thu, 10 Jun 2010 13:27:49 -0400 Received: by opsy.redhat.com (Postfix, from userid 500) id B27393782DC; Thu, 10 Jun 2010 11:27:48 -0600 (MDT) From: Tom Tromey To: Pedro Alves Cc: gdb-patches@sourceware.org Subject: Re: [gdbserver] x86 agent expression bytecode compiler (speed up conditional tracepoints) References: <201006071700.28706.pedro@codesourcery.com> Reply-To: tromey@redhat.com Date: Thu, 10 Jun 2010 17:28:00 -0000 In-Reply-To: <201006071700.28706.pedro@codesourcery.com> (Pedro Alves's message of "Mon, 7 Jun 2010 17:00:28 +0100") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2010-06/txt/msg00245.txt.bz2 >>>>> "Pedro" == Pedro Alves writes: Pedro> This adds a bytecode compiler to the linux x86 ports of Pedro> gdbserver, that turns agent expression bytecodes into Pedro> native code. This greatly speeds up conditional tracepoints Pedro> (by around an order of magnitude) that usually don't reference much Pedro> more than a few variables (memory/registers), to around 100ns or Pedro> less on a typical modern x86 box. This is awesome! I think it deserves a NEWS entry. Tom