Cisco Cisco Content Delivery Engine 460 Notas de publicación
Release Notes for Cisco VDS-TV
check_cycle2ns_overflow.pl script for 2.6.32
kernel
Tested Configuration(s)
VDS-TV server running 2.6.32 kernel.
Description
The script check_cycle2ns_overflow.pl can be run on any VDS-TV server (CDE-470, CDE-460,
CDE-250, CDE-220, CDE-420) running the 2.6.32 kernel to determine the time it takes before
the overflow condition is reached on systems that don't have the fix. The overflow condition
happens in the kernel while converting the CPU TSC to nanoseconds, which can lead to a divide-
by-zero KDB or a misidentification of CPU soft lockup events.
For more details on the issue, please refer Cisco Defect ID: CSCui91625: Kernel2.6.32: System
freezes OR Crashes after Uptime reaches 208+ days.
Files
File Name:
check_cycle2ns_overflow.tgz
Size:
977 bytes
md5sum:
fad2a1eb6bcdd0b3e61b0a252bfa571d
Date:
08/15/2013
Script Installation
1. Login as root to the VDS server, where the overflow condition to be checked.
2. Make sure that the cserver is running(/proc/calypso/tunables/ directory is created when
2. Make sure that the cserver is running(/proc/calypso/tunables/ directory is created when
Cserver is running, which is simple way to check)
3. Copy check_cycle2ns_overflow.tgz utility on the server under /root directory.
4. From /root directory, extract and unzip the tar file:
4. From /root directory, extract and unzip the tar file:
o
[root@utah76 ~]# tar -xvzf check_cycle2ns_overflow.tgz
check_cycle2ns_overflow.pl
check_cycle2ns_overflow.pl
5. When this script is run, it will determine the number of days it will take to hit the issue next
time.