Date: Fri, 27 Apr 2012 09:50:10 GMT From: "Alexander Churanov" <freebsd@alexanderchuranov.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/166549: [eventttimers] Clock stops ticking in some cases with new timer framework in 9 Message-ID: <201204270950.q3R9oAVJ062719@freefall.freebsd.org>
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The following reply was made to PR kern/166549; it has been noted by GNATS.
From: "Alexander Churanov" <freebsd@alexanderchuranov.com>
To: bug-followup@freebsd.org, lists@rewt.org.uk
Cc:
Subject: Re: kern/166549: [eventttimers] Clock stops ticking in some cases
with new timer framework in 9
Date: Fri, 27 Apr 2012 13:45:28 +0400
I also observe the same problem and decided to submit more data.
Output of 'uname -a':
FreeBSD vps-1 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:15:25 UTC
2012 root@obrian.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
'svn up' and 'ssh somebody@localhost' hang. According to ktrace it's on
select() call.
Output of 'sysctl kern.timecounter'
kern.timecounter.tick: 1
kern.timecounter.choice: TSC(-100) i8254(0) dummy(-1000000)
kern.timecounter.hardware: i8254
kern.timecounter.stepwarnings: 0
kern.timecounter.tc.i8254.mask: 65535
kern.timecounter.tc.i8254.counter: 15162
kern.timecounter.tc.i8254.frequency: 1193182
kern.timecounter.tc.i8254.quality: 0
kern.timecounter.tc.TSC.mask: 4294967295
kern.timecounter.tc.TSC.counter: 1850043174
kern.timecounter.tc.TSC.frequency: 2261052965
kern.timecounter.tc.TSC.quality: -100
kern.timecounter.smp_tsc: 0
kern.timecounter.invariant_tsc: 0
Output of 'sysctl kern.eventtimer':
kern.eventtimer.choice: LAPIC(400) i8254(100) RTC(0)
kern.eventtimer.et.LAPIC.flags: 15
kern.eventtimer.et.LAPIC.frequency: 50001127
kern.eventtimer.et.LAPIC.quality: 400
kern.eventtimer.et.RTC.flags: 17
kern.eventtimer.et.RTC.frequency: 32768
kern.eventtimer.et.RTC.quality: 0
kern.eventtimer.et.i8254.flags: 1
kern.eventtimer.et.i8254.frequency: 1193182
kern.eventtimer.et.i8254.quality: 100
kern.eventtimer.periodic: 0
kern.eventtimer.timer: LAPIC
kern.eventtimer.idletick: 0
kern.eventtimer.singlemul: 4
Output of 'vmstat -i':
interrupt total rate
irq5: re0 uhci0 3066560 66
irq10: re1 80 0
irq14: ata0 482243 10
cpu0:timer 5509435 119
cpu1:timer 862559 18
Total 9920877 215
sysctl kern.eventtimer.periodic=1 starts the clock!
A part of dmesg that seems relevant:
ACPI Error: A valid RSDP was not found (20110527/tbxfroot-237)
Copyright (c) 1992-2012 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:15:25 UTC 2012
root@obrian.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
ACPI Error: A valid RSDP was not found (20110527/tbxfroot-237)
CPU: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (2261.05-MHz
686-class CPU)
Origin = "GenuineIntel" Id = 0x106a5 Family = 6 Model = 1a Stepping
= 5
Features=0x1781fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,MMX
,FXSR,SSE,SSE2,HTT>
Features2=0x80982201<SSE3,SSSE3,CX16,SSE4.1,SSE4.2,POPCNT,HV>
AMD Features=0x20100000<NX,LM>
AMD Features2=0x1<LAHF>
real memory = 536870912 (512 MB)
avail memory = 506146816 (482 MB)
MPTable: <_HVMCPU_ XEN >
Event timer "LAPIC" quality 400
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 2
ioapic0: Changing APIC ID to 1
ioapic0: Assuming intbase of 0
ioapic0 <Version 1.1> irqs 0-47 on motherboard
kbd1 at kbdmux0
ACPI Error: A valid RSDP was not found (20110527/tbxfroot-237)
ACPI: Table initialisation failed: AE_NOT_FOUND
ACPI: Try disabling either ACPI or apic support.
I hope this will help to resolve the issue.
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