STI, HLT in acpi_cpu_idle_c1

Scott Long scottl at
Fri Jun 25 11:32:29 PDT 2004

Gerrit Nagelhout wrote:

> Scott Long wrote:
>>This likely means that you're no longer getting any interrupts at all.
>>Btw, is the aac driver running it MPSAFE or FAST mode?  I'm 
>>not sure if
>>changing it to MPSAFE mode will make a difference, and it 
>>certainly will
>>change the timings in our system.
> Looks like it's running in FAST mode.  What will change by running it in
> MPSAFE mode?

In FAST mode, the interrupt handler is directly dispatched when the
interrupt comes in.  In MPSAFE mode, it runs in an ithread.


More information about the freebsd-current mailing list