timers slow (sleep 1 taking five seconds)

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

I think I saw this some months ago, but then problem disappeared.

But today:

$ time sleep 1
    5.03s real     0.00s user     0.01s system
$ time sleep 2
   10.01s real     0.00s user     0.00s system

$ date ; timeout 5 sleep 10 ; date
Fri Dec  2 23:56:42 UTC 2022
Fri Dec  2 23:57:07 UTC 2022

$ date ; sleep 0.5 ; date
Fri Dec  2 23:58:24 UTC 2022
Fri Dec  2 23:58:27 UTC 2022

timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
Dell Inc. Inspiron 560s  (00)

ACPI: HPET 0x00000000BDD6A640 000038 (v01 111010 OEMHPET  20101110 MSFT 00000097)

acpi0: fixed power button present
timecounter: Timecounter "ACPI-Fast" frequency 3579545 Hz quality 1000
hpet0 at acpi0: high precision event timer (mem 0xfed00000-0xfed00400)
timecounter: Timecounter "hpet0" frequency 14318180 Hz quality 2000

attimer1 at acpi0 (TMR, PNP0100): io 0x40-0x43 irq 0

t1:reed$ date ; time sleep 1 ; date         
Sat Dec  3 00:31:40 UTC 2022
    5.01s real     0.00s user     0.00s system
Sat Dec  3 00:31:45 UTC 2022

$ cat /kern/hz
100

$ uname -mrsv  
NetBSD 9.2 NetBSD 9.2 (GENERIC) #0: Wed May 12 13:15:55 UTC 2021  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64

$ uptime
 1:48AM  up 94 days, 11:49, 4 users, load averages: 0.12, 0.38, 0.22

The system is continually used without any other noticable issues.

Any ideas on how to tune this? Possible to fix without 
reboot? Troubleshoot?

Thanks