NetBSD Problem Report #55247

From christos@astron.com  Fri May  8 19:14:33 2020
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Date: Fri,  8 May 2020 17:57:40 +0000 (UTC)
From: christos@astron.com
Reply-To: christos@astron.com
To: gnats-bugs@NetBSD.org
Subject: Recent tsc changes make clock race (1 hour per day)
X-Send-Pr-Version: 3.95

>Number:         55247
>Category:       kern
>Synopsis:       Recent tsc changes make clock race (1 hour per day)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri May 08 19:15:00 +0000 2020
>Last-Modified:  Tue May 12 06:50:01 +0000 2020
>Originator:     Christos Zoulas
>Release:        NetBSD 9.99.60
>Organization:
	Racing Clocks Inc.
>Environment:
System: NetBSD quasar.astron.com 9.99.60 NetBSD 9.99.60 (QUASAR) #165: Tue May 5 20:44:19 EDT 2020 christos@quasar.astron.com:/usr/src/sys/arch/amd64/compile/QUASAR amd64
Architecture: x86_64
Machine: amd64
>Description:

	Ntp refuses to sync since the clock is racing too fast.

>How-To-Repeat:
        Manufacturer: Dell Inc.
        Product Name: Precision 5820 Tower
	kern.timecounter.choice = TSC(q=3000, f=3850000000 Hz) clockinterrupt(q=0, f=4000 Hz) hpet0(q=2000, f=24000000 Hz) ACPI-Fast(q=1000, f=3579545 Hz) lapic(q=-100, f=25000000 Hz) i8254(q=100, f=1193182 Hz) dummy(q=-1000000, f=1000000 Hz)

>Fix:
	sysctl -w kern.timecounter.hardware=hpet0

>Audit-Trail:
From: SAITOH Masanobu <msaitoh@execsw.org>
To: gnats-bugs@netbsd.org, kern-bug-people@netbsd.org,
 gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Cc: msaitoh@execsw.org
Subject: Re: kern/55247: Recent tsc changes make clock race (1 hour per day)
Date: Tue, 12 May 2020 15:45:01 +0900

 On 2020/05/09 4:15, christos@astron.com wrote:
 >> Number:         55247
 >> Category:       kern
 >> Synopsis:       Recent tsc changes make clock race (1 hour per day)
 >> Confidential:   no
 >> Severity:       serious
 >> Priority:       medium
 >> Responsible:    kern-bug-people
 >> State:          open
 >> Class:          sw-bug
 >> Submitter-Id:   net
 >> Arrival-Date:   Fri May 08 19:15:00 +0000 2020
 >> Originator:     Christos Zoulas
 >> Release:        NetBSD 9.99.60
 >> Organization:
 > 	Racing Clocks Inc.
 >> Environment:
 > System: NetBSD quasar.astron.com 9.99.60 NetBSD 9.99.60 (QUASAR) #165: Tue May 5 20:44:19 EDT 2020 christos@quasar.astron.com:/usr/src/sys/arch/amd64/compile/QUASAR amd64
 > Architecture: x86_64
 > Machine: amd64
 >> Description:
 > 
 > 	Ntp refuses to sync since the clock is racing too fast.
 > 
 >> How-To-Repeat:
 >          Manufacturer: Dell Inc.
 >          Product Name: Precision 5820 Tower
 > 	kern.timecounter.choice = TSC(q=3000, f=3850000000 Hz) clockinterrupt(q=0, f=4000 Hz) hpet0(q=2000, f=24000000 Hz) ACPI-Fast(q=1000, f=3579545 Hz) lapic(q=-100, f=25000000 Hz) i8254(q=100, f=1193182 Hz) dummy(q=-1000000, f=1000000 Hz)
 > 
 >> Fix:
 > 	sysctl -w kern.timecounter.hardware=hpet0
 > 

 Cold you try x86/cpu.c rev. 1.191?

 And also please show the following info:

 - full dmesg
 - cpuctl -v identify 0

 Thanks in advance.


 -- 
 -----------------------------------------------
                  SAITOH Masanobu (msaitoh@execsw.org
                                   msaitoh@netbsd.org)

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