From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 6594 invoked by alias); 4 Feb 2011 13:49:30 -0000 Received: (qmail 6573 invoked by uid 22791); 4 Feb 2011 13:49:28 -0000 X-SWARE-Spam-Status: No, hits=-1.3 required=5.0 tests=AWL,BAYES_00,MSGID_FROM_MTA_HEADER,SPF_SOFTFAIL,TW_EG,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mtagate6.uk.ibm.com (HELO mtagate6.uk.ibm.com) (194.196.100.166) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 04 Feb 2011 13:49:23 +0000 Received: from d06nrmr1806.portsmouth.uk.ibm.com (d06nrmr1806.portsmouth.uk.ibm.com [9.149.39.193]) by mtagate6.uk.ibm.com (8.13.1/8.13.1) with ESMTP id p14DnEUh025125 for ; Fri, 4 Feb 2011 13:49:14 GMT Received: from d06av02.portsmouth.uk.ibm.com (d06av02.portsmouth.uk.ibm.com [9.149.37.228]) by d06nrmr1806.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p14DnHx71917020 for ; Fri, 4 Feb 2011 13:49:17 GMT Received: from d06av02.portsmouth.uk.ibm.com (loopback [127.0.0.1]) by d06av02.portsmouth.uk.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p14DnDmA025753 for ; Fri, 4 Feb 2011 06:49:14 -0700 Received: from tuxmaker.boeblingen.de.ibm.com (tuxmaker.boeblingen.de.ibm.com [9.152.85.9]) by d06av02.portsmouth.uk.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with SMTP id p14DnCeY025641; Fri, 4 Feb 2011 06:49:12 -0700 Message-Id: <201102041349.p14DnCeY025641@d06av02.portsmouth.uk.ibm.com> Received: by tuxmaker.boeblingen.de.ibm.com (sSMTP sendmail emulation); Fri, 04 Feb 2011 14:49:12 +0100 Subject: Re: performance of multithreading gets gradually worse under gdb To: tromey@redhat.com (Tom Tromey) Date: Fri, 04 Feb 2011 13:49:00 -0000 From: "Ulrich Weigand" Cc: markus@hyperion-imrt.org (Markus Alber), msnyder@vmware.com (Michael Snyder), gdb@sourceware.org, pedro@codesourcery.com In-Reply-To: from "Tom Tromey" at Feb 03, 2011 03:04:12 PM MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org X-SW-Source: 2011-02/txt/msg00022.txt.bz2 Tom Tromey wrote: > >>>>> "Ulrich" == Ulrich Weigand writes: > Ulrich> (Actually, now that every thread always has a thread_info, the > Ulrich> best thing would probably be anyway to hang each thread's regcaches > Ulrich> off the thread_info, and do away with the global list completely.) > > I suppose in this case, invalidating could simply clear a regcache > instead of deleting (and subsequently recreating) it. Is that correct? Yes, I think so. Note that we still need to (potentially) keep more than one regcache per thread for multi-arch support. We may also need to reset the regcache's address space before reusing it ... Bye, Ulrich -- Dr. Ulrich Weigand GNU Toolchain for Linux on System z and Cell BE Ulrich.Weigand@de.ibm.com