System Bios Events; System Events; System Boot; Timestamp Clock Synchronization - Intel S1400FP Manual

System Event Log Troubleshooting Guide for EPSD Platforms Based on Intel
9.

System BIOS Events

There are a number of events that are owned by the system BIOS. These events can occur during Power On Self Test (POST) or
when coming out of a sleep state. Not all of these events signify errors. Some events are described in other chapters in this
document (for example, memory events).
9.1

System Events

These events can occur during POST or when coming out of a sleep state. These are informational events only.
1. When logging events during BIOS POST uses generator ID 0001h.
2. When logging events during BIOS SMI Handler uses generator ID 0033h.
9.1.1

System Boot

At the end of POST, just before the actual OS boot occurs, a System Boot Event is logged. This basically serves to mark the
transition of control from completed POST to OS Loader. It is an informational only event.
9.1.2

Timestamp Clock Synchronization

These events are used when the time between the BIOS and the BMC is synchronized. Two events are logged. The BIOS does the
first one to send the time synch message to the BMC for synchronization, and the timestamp that message gets is unknown, that is,
the timestamp in the log can be anything because it gets the "before" timestamp.
So the BIOS sends a second time synch message to get a "baseline" correct timestamp in the log. That is the "starting time".
For example, say that the time the BMC has is March 1, 2011 21:00. The BIOS time synch updates that to the same date, 21:20 (the
BMC was running behind). Without that second time synch message, you don't know that the log time jumped ahead, and when you
get the next log message it looks like there was a 20-min delay during the boot for some unknown reasons.
Without that second time synch message, the time span to the next logged message is indeterminate. With the second time synch as
a baseline, the following log timestamps are always determinate.
Revision 1.1
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System BIOS Events
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