From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id caWELqBdoGM2WwUAWB0awg (envelope-from ) for ; Mon, 19 Dec 2022 07:48:32 -0500 Received: by simark.ca (Postfix, from userid 112) id A86491E222; Mon, 19 Dec 2022 07:48:32 -0500 (EST) Authentication-Results: simark.ca; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.a=rsa-sha256 header.s=default header.b=Xs1muvOS; dkim-atps=neutral X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on simark.ca X-Spam-Level: X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, RDNS_DYNAMIC,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 Received: from sourceware.org (ip-8-43-85-97.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id AA8941E0D3 for ; Mon, 19 Dec 2022 07:48:30 -0500 (EST) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 51F263858C54 for ; Mon, 19 Dec 2022 12:48:27 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 51F263858C54 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1671454107; bh=nBKEsV0eENSDJQ4ZpwemAbO+f+i3M61MnNWjbNPfups=; h=Date:To:Cc:In-Reply-To:Subject:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=Xs1muvOSnsY0x1Xc1duH/ykAWZeJaRxj1p+vNw1QuKesWY1ggOk2NMM7yYwa5pWm3 8/kQocGQBhYxru36PyK3ZQkKXimI1pQ6zBKoDmZk1s5Lto26AluLOMlLGTl8ahuzuy 23BxhR+8ymte4qkiCGmq+/q06nPNspWOn8kNYF8s= Received: from eggs.gnu.org (eggs.gnu.org [IPv6:2001:470:142:3::10]) by sourceware.org (Postfix) with ESMTPS id 66D803858D1E for ; Mon, 19 Dec 2022 12:48:08 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 66D803858D1E Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p7FYs-0003kY-UD; Mon, 19 Dec 2022 07:48:07 -0500 Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p7FYs-0004aG-FJ; Mon, 19 Dec 2022 07:48:06 -0500 Date: Mon, 19 Dec 2022 14:48:17 +0200 Message-Id: <83k02neezy.fsf@gnu.org> To: Luis Machado Cc: gdb-patches@sourceware.org In-Reply-To: <58b64bf8-90b6-d080-c060-d03761501199@arm.com> (message from Luis Machado on Mon, 19 Dec 2022 10:07:27 +0000) Subject: Re: Two observations using GDB 13 snapshot References: <83h6xugc5v.fsf@gnu.org> <58b64bf8-90b6-d080-c060-d03761501199@arm.com> X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Eli Zaretskii via Gdb-patches Reply-To: Eli Zaretskii Errors-To: gdb-patches-bounces+public-inbox=simark.ca@sourceware.org Sender: "Gdb-patches" > Date: Mon, 19 Dec 2022 10:07:27 +0000 > From: Luis Machado > > On 12/17/22 17:42, Eli Zaretskii via Gdb-patches wrote: > > Using the latest snapshot of GDB 13 (MinGW build on native Windows), I > > see some strange behavior I've not seen with previous versions: > > > > . Very long time to read symbols. E.g., reading symbols of its own > > binary takes a whopping 2 minutes. GDB 12.1 does the same in > > under 10 seconds. > > There used to be a dwarf performance regression, but from looking at the bug (https://sourceware.org/bugzilla/show_bug.cgi?id=29105), it seems to be fixed. > > I'm not sure if it manifests differently on MinGW. This build is without std::thread. Maybe it's related? Does GDB 13 read DWARF debug info significantly differently than previous versions? Do you see this on GNU/Linux, when debugging GDB with itself, if you disable multithreaded DWARF reading? Thanks.