From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15687 invoked by alias); 25 May 2010 17:43:18 -0000 Received: (qmail 15595 invoked by uid 22791); 25 May 2010 17:43:17 -0000 X-SWARE-Spam-Status: No, hits=-5.7 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; Tue, 25 May 2010 17:43:11 +0000 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o4PHh8Yx026824 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 25 May 2010 13:43:09 -0400 Received: from host0.dyn.jankratochvil.net (ovpn01.gateway.prod.ext.phx2.redhat.com [10.5.9.1]) by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o4PHgvnG006070 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 25 May 2010 13:43:06 -0400 Received: from host0.dyn.jankratochvil.net (localhost [127.0.0.1]) by host0.dyn.jankratochvil.net (8.14.4/8.14.4) with ESMTP id o4PHguM9015418; Tue, 25 May 2010 19:42:56 +0200 Received: (from jkratoch@localhost) by host0.dyn.jankratochvil.net (8.14.4/8.14.4/Submit) id o4PHgsbb015410; Tue, 25 May 2010 19:42:54 +0200 Date: Tue, 25 May 2010 18:19:00 -0000 From: Jan Kratochvil To: Tom Tromey Cc: gdb-patches@sourceware.org Subject: performance talk [Re: RFC: implement DW_OP_bit_piece] Message-ID: <20100525174253.GA12968@host0.dyn.jankratochvil.net> References: <20100520210135.GA31238@host0.dyn.jankratochvil.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-08-17) X-IsSubscribed: yes 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: 2010-05/txt/msg00570.txt.bz2 On Fri, 21 May 2010 19:44:50 +0200, Tom Tromey wrote: > Jan> GDB has much more serious performance issues (symbols reading, > Jan> lookup) than evaluation of any specific values. > > If you know of specific bad cases, I'm very interested in that. > I think we understand the symbol reading problem pretty well now, but > other stuff could at least use bug reports. Checked now we were talking about `attach' being fast enough (~2s on OOo.org) but I was testing it with `archer-tromey-delayed-symfile2'. Then `bt full' is still slow - tens of secs. More than 3GB of RAM or SSD would help caching the on-disk debuginfo files, though. My box could be also declared as an inappropriate for development of apps of the OOo.org size. Thanks, Jan