[Info-vax] Clock running very slow on an Alpha

[Brian]

Some things to think about.

Time keeping is done by an interval timer on CPU when the OS is up and 
running. The hardware TOY clock is only used as a reference when the OS 
is shutdown. The TOY clock is often incorrectly  blamed for time keeping 
issues on AlphaServers.

The interval timer interrupts at level 22. A higher interrupt like a 
machine check can block the interval time and cause the system time to 
slow down. Correctable memory or CPU errors can happen at a high rate 
and cause system time to slow down.

If you have more that one CPU in the box try swapping CPU0 with another 
CPU. Also make sure all CPUS are the same model and speed.


BC