slow clock on DELL Latitude 5501

[is%netbsd.org@localhost]

Hi,

I tried NetBSD-8.1_Stable on a Dell Latitude 5501 with
8.1 kernel/modules and with 9.99.46 kernel/modules.

The clock is off by a factor of about 3 to 5.

I've tried all settings of kern.timecounter.hardware (see below).

Any idea?

	-is

localhost# sysctl kern.timecounter
kern.timecounter.choice = TSC(q=3000, f=10427265820 Hz)
	clockinterrupt(q=0, f=100 Hz)
	hpet0(q=2000, f=24000000 Hz)
	ACPI-Fast(q=1000, f=3579545 Hz)
	lapic(q=-100, f=100310473 Hz)
	i8254(q=100, f=1193182 Hz)
	dummy(q=-1000000, f=1000000 Hz)
kern.timecounter.hardware = TSC
kern.timecounter.timestepwarnings = 0

localhost# egrep -i '(time|clock)' /var/run/dmesg.boot                                                                                                        [   1.0000000] timecounter: Timecounters tick every 10.000 msec
[   1.0000000] timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
[   1.0000030] timecounter: Timecounter "ACPI-Fast" frequency 3579545 Hz quality 1000
[   1.0290287] hpet0 at acpi0: high precision event timer (mem 0xfed00000-0xfed00400)
[   1.0290287] timecounter: Timecounter "hpet0" frequency 24000000 Hz quality 2000
[   1.0293419] attimer1 at acpi0 (TIMR, PNP0100): io 0x40-0x43,0x50-0x53 irq 0
[   1.0293419] attimer1: attached to pcppi0
[   1.0293419] timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
[   2.2882874] timecounter: Timecounter "TSC" frequency 10427265820 Hz quality 3000

cpu is an 8-core:

cpu0: "Intel(R) Core(TM) i5-9400H CPU @ 2.50GHz"
cpu0: Intel 7th or 8th gen Core (Kaby Lake, Coffee Lake) (686-class), 10427.27 MHz
cpu0: family 0x6 model 0x9e stepping 0xd (id 0x906ed)