X-Spam-Check-By: sourceware.org Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Subject: cygwin 1.5.20-1, spinning pdksh, 100% CPU Date: Tue, 31 Jul 2007 15:40:02 -0400 Message-ID: <76087731258D2545B1016BB958F00ADA1234D7@STEELPO.steeleye.com> From: "Ernie Coskrey" To: X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id l6VJgIrm014917 I've run into a problem with cygwin 1.5.20-1 and pdksh 5.2.14. We've got a pdksh.exe process that is spinning, using all the CPU. This scenario is very hard to reproduce, but has happened on our test systems occasionally. It occurred recently, and I currently have gdb attached to the process and have the symbols loaded. I see that pdksh is continually calling "sigsuspend()", which is immediately returning from cancelable_wait due to the fact that the signal_arrived event is set. I also see that pdksh is waiting for a subprocess to complete, and has a handle to the PID of that process - however the process has long since terminated. It appears that something went wrong during delivery of SIGCHLD. I've got two questions related to this: - have there been changes between 1.5.20-1 and 1.5.24-2, or the latest snapshot, that might have fixed this issue? We've done some limited testing with 1.5.24-2 and haven't seen this happen yet, but as I said the it only happens rarely. - is there anything I can look at in gdb to help identify what the issue is? Any suggestions would be appreciated! --------- Ernie Coskrey SteelEye Technology, Inc. 803-808-4275 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/