Re: CVS commit: src/sys/arch

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Thu, May 21, 2020 at 09:12:31PM +0000, Andrew Doran wrote:
> Module Name:	src
> Committed By:	ad
> Date:		Thu May 21 21:12:31 UTC 2020
> 
> Modified Files:
> 	src/sys/arch/x86/acpi: acpi_wakeup.c
> 	src/sys/arch/x86/include: i82489var.h
> 	src/sys/arch/x86/x86: cpu.c lapic.c x86_machdep.c
> 	src/sys/arch/xen/x86: cpu.c
> 	src/sys/arch/xen/xen: hypervisor.c xen_clock.c
> 
> Log Message:
> - Recalibrate the APIC timer using the TSC, once the TSC has in turn been
>   recalibrated using the HPET.  This gets the clock interrupt firing more
>   closely to HZ.

Why using the TSC and not the HPET directly? For systems with HPET, same
question with the ACPI / PCI timer.

Joerg