From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21030 invoked by alias); 5 Sep 2012 15:30:25 -0000 Received: (qmail 21009 invoked by uid 22791); 5 Sep 2012 15:30:23 -0000 X-SWARE-Spam-Status: No, hits=-3.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED X-Spam-Check-By: sourceware.org Received: from localhost (HELO sourceware.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 05 Sep 2012 15:30:12 +0000 From: "hjl.tools at gmail dot com" To: glibc-bugs@sources.redhat.com Subject: [Bug dynamic-link/14370] ld.so crashes on mismatched TLS/non-TLS symbols Date: Wed, 05 Sep 2012 15:30:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: dynamic-link X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: hjl.tools at gmail dot com X-Bugzilla-Status: REOPENED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: glibc-bugs-owner@sourceware.org X-SW-Source: 2012-09/txt/msg00039.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=14370 --- Comment #23 from H.J. Lu 2012-09-05 15:29:56 UTC --- (In reply to comment #22) > (In reply to comment #20) > > > The performance impact is too small to be visible unless most > > of time is spent in _dl_symbol_lookup_x. > > For a large application with 1000+ shared libraries (which is how we run unit > tests here), time-to-main often *is* dominated by _dl_symbol_lookup_x. Do you have a setup to simulate this with the newly built glibc without installing it? > "make && make check" are about the worst possible way to measure the impact -- > they invoke small programs with (relatively) very few dynamic symbol > resolutions. Understand. But it is the easiest way to test the newly built glibc. > Measuring startup time for Firefox or OpenOffice would (I expect) be much more > meaningful. This isn't practical for me. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.