From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15140 invoked by alias); 10 Feb 2014 13:28:43 -0000 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 Received: (qmail 15109 invoked by uid 48); 10 Feb 2014 13:28:38 -0000 From: "vinxxe at gmail dot com" To: glibc-bugs@sourceware.org Subject: [Bug nptl/16549] New: pthread_cond_wait and pthread_cond_timedwait do not suspend the calling thread Date: Mon, 10 Feb 2014 13:28:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: nptl X-Bugzilla-Version: 2.12 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: vinxxe at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-02/txt/msg00357.txt.bz2 https://sourceware.org/bugzilla/show_bug.cgi?id=16549 Bug ID: 16549 Summary: pthread_cond_wait and pthread_cond_timedwait do not suspend the calling thread Product: glibc Version: 2.12 Status: NEW Severity: normal Priority: P2 Component: nptl Assignee: unassigned at sourceware dot org Reporter: vinxxe at gmail dot com CC: drepper.fsp at gmail dot com Created attachment 7402 --> https://sourceware.org/bugzilla/attachment.cgi?id=7402&action=edit source file to reproduce the problem the two functions pthread_cond_wait and pthread_cond_timedwait do not suspend the calling thread if the condition variable has a misaligned address. attached find the source code to reproduce the problem as well as a file describing my current software configuration. to compile gcc -g3 -pthread -o cond_ex cond_example.c then run the program and watch the cpu load with top -p should see the waiter tread continuously running instead of sleeping. to remove the problem compile with gcc -D_ALIGNED -g3 -pthread -o cond_ex cond_example.c the followings are some system information of my linux machine cat /proc/version Linux version 2.6.32-220.7.1.el6.centos.plus.i686 (root@thalix11dev) (gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC) ) #1 SMP Mon Oct 21 07:05:28 UTC 2013 rpm -qa | grep glibc glibc-devel-2.12-1.47.i686 glibc-common-2.12-1.47.i686 glibc-2.12-1.47.i686 glibc-debuginfo-2.12-1.47.i686 glibc-headers-2.12-1.47.i686 glibc-utils-2.12-1.47.i686 glibc-debuginfo-common-2.12-1.47.i686 glibc-static-2.12-1.47.i686 cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 3 model name : Intel(R) Pentium(R) 4 CPU 2.80GHz stepping : 4 cpu MHz : 2799.930 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc up pebs bts pni dtes64 monitor ds_cpl cid xtpr bogomips : 5586.31 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 32 bits virtual power management: rpm -qa | grep gcc gcc-4.4.6-3.el6.i686 libgcc-4.4.6-3.el6.i686 gcc-c++-4.4.6-3.el6.i686 -- You are receiving this mail because: You are on the CC list for the bug.