Red Hat Bugzilla – Bug 124827
Running oprofile for too long freezes system
Last modified: 2010-11-05 10:51:58 EDT
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113 Description of problem: If the oprofile daemon runs for too long it "freezes" the system. This has happened on two different machines. I configure oprofile by typing opcontrol --vmlinux=/boot/vmlinux-`uname -r` I then start the profiling by typing opcontrol --start It runs for quite a while, but inevitably it freezes the system after several hours. Version-Release number of selected component (if applicable): oprofile-0.5.4-22 How reproducible: Always Steps to Reproduce: 1. opcontrol --vmlinux=/boot/vmlinux-`uname -r` 2. opcontrol --start 3. Wait several hours Additional info:
OProfile is very closely tied to the hardware and the kernel. Please include information about which kernel is being used (uname -a), what processor (cat /proc/cpuinfo), and what motherboard are being used. Are the machines the same or are there difference between them. Are the machines idles when this is going on? Or are you actively working on something on the machines when they freeze. -Will
Created attachment 100738 [details] The output of 'cat /proc/cpuinfo'
Here is the output of uname -a: Linux carla.library.uiuc.edu 2.4.21-15.ELsmp #1 SMP Thu Apr 22 00:18:24 EDT 2004 i686 i686 i386 GNU/Linux The system is a stock Dell PowerEdge 2500. I will try to find the motherboard information.
There were some changes made in the Kernel OProfile support in the RHEL3 U3. I suspect that these changes fix the problem that you were having. I have been able to run OProfile on a PIII Dell precision 420 for several days at a time without a problem. Could you verify that the new kernel resolves the issue?