SYSTEM_DUMP
UtilityThis feature requires to you to have the HOT_RESTART
and BLACKBOX
features
set to true. You must also have a TFTP daemon running on the host server.
If a microkernel crash occurs in the ChorusOS operating system, the SYSTEM_DUMP
feature enables you to read blackbox
information. If the microkernel raises an exception, the SYSTEM_DUMP
panic handler saves specific information. This is
dumped into a persistent memory area, allocated at boot time. The feature
then forces a hot reboot to reset the microkernel to a stable state. After
reboot, a special actor called the system dump actor
uses TFTP to dump an ASCII file on your predetermined host.
This ASCII file contains the information contained in the BLACKBOX
facility.
The iom.wdt.sysdump
tunable is common to both system dump
and watchdog timer. The value of iom.wdt.sysdump
is set to 0 by default.
If the value of this tunable is set to 1, SYSTEM_DUMP
is true and the watchdog
timer feature, (feature name: WDT
) is true, a system
dump is triggered on the host server when the watchdog timer expires.
For more information, consult SYSTEM_DUMP(5FEA).