Date: Thu, 14 Jun 2001 09:55:01 +0200 From: sthaug@nethelp.no To: kpielorz@tdx.co.uk Cc: bkarp@icsi.berkeley.edu, freebsd-smp@FreeBSD.ORG Subject: Re: clock speedup on 4.3 SMP boxes Message-ID: <39352.992505301@verdi.nethelp.no> In-Reply-To: Your message of "Thu, 14 Jun 2001 08:40:10 %2B0100" References: <01061408401004.02487@lorca.tdx.co.uk>
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> I think I've seen the same thing, and not realised it... The machine is
> normally lightly loaded, with occasional 'busy' patches... I noticed the
> clock had drifted the other day on it (by about 20 minutes) - which I thought
> was odd, as the machine also runs NTP, which had actually quit, looking at
> the logs for ntpd, it's littered with stuff like:
>
> Apr 22 19:21:26 host ntpd[275]: time reset -3.527853 s
> Apr 22 19:21:26 host ntpd[275]: synchronisation lost
> Apr 23 03:03:13 host ntpd[275]: time reset -2.456250 s
> Apr 23 03:03:13 host ntpd[275]: synchronisation lost
> Apr 23 10:13:34 host ntpd[275]: time reset -2.181482 s
> Apr 23 10:13:34 host ntpd[275]: synchronisation lost
We're seeing the same thing on an IBM Netfinity 5600 server (Serverworks
LE chipset) running 4.3-STABLE (dmesg included at the end):
Jun 13 01:34:12 mail ntpd[88656]: time reset 0.209762 s
Jun 13 03:33:11 mail ntpd[88656]: time reset -0.179529 s
Jun 13 06:37:46 mail ntpd[88656]: time reset 0.189002 s
Jun 13 08:55:34 mail ntpd[88656]: time reset -0.184713 s
Jun 13 10:44:48 mail ntpd[88656]: time reset -0.197186 s
Jun 13 19:29:21 mail ntpd[88656]: time reset 0.200083 s
Jun 13 22:01:07 mail ntpd[88656]: time reset -0.211034 s
Jun 14 02:18:40 mail ntpd[88656]: time reset 0.161246 s
Jun 14 03:51:36 mail ntpd[88656]: time reset 0.159329 s
Jun 14 08:25:08 mail ntpd[88656]: time reset -0.188393 s
This is not 4.3 specific, we've had the same thing happen with 4.2. A
similar server with only one processor runs NTP extremely stable.
Steinar Haug, Nethelp consulting, sthaug@nethelp.no
----------------------------------------------------------------------
Copyright (c) 1992-2001 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 4.3-STABLE #0: Mon May 7 00:12:43 CEST 2001
sthaug@mail.enitel.no:/local/freebsd/stable4/src/sys/compile/MAIL1_SMP
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium III/Pentium III Xeon/Celeron (599.72-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x681 Stepping = 1
Features=0x387fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,PN,MMX,FXSR,SSE>
real memory = 939503616 (917484K bytes)
avail memory = 911310848 (889952K bytes)
Programming 16 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
Programming 16 pins in IOAPIC #1
IOAPIC #1 intpin 10 -> irq 5
FreeBSD/SMP: Multiprocessor motherboard
cpu0 (BSP): apic id: 1, version: 0x00040011, at 0xfee00000
cpu1 (AP): apic id: 0, version: 0x00040011, at 0xfee00000
io0 (APIC): apic id: 14, version: 0x000f0011, at 0xfec00000
io1 (APIC): apic id: 15, version: 0x000f0011, at 0xfec01000
Preloaded elf kernel "kernel" at 0xc0318000.
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <ServerWorks NB6635 3.0LE host to PCI bridge> on motherboard
IOAPIC #1 intpin 11 -> irq 2
IOAPIC #1 intpin 0 -> irq 9
IOAPIC #0 intpin 9 -> irq 16
pci0: <PCI bus> on pcib0
pci0: <S3 Trio3D graphics accelerator> at 1.0
pci0: <unknown card> (vendor=0x1022, dev=0x2000) at 2.0 irq 2
ahc0: <Adaptec 2940 Ultra2 SCSI adapter> port 0x2200-0x22ff mem 0xfebfe000-0xfebfefff irq 9 at device 9.0 on pci0
aic7890/91: Wide Channel A, SCSI Id=7, 32/255 SCBs
pcib1: <DEC 21152 PCI-PCI bridge> at device 10.0 on pci0
IOAPIC #1 intpin 2 -> irq 17
IOAPIC #1 intpin 3 -> irq 18
pci1: <PCI bus> on pcib1
fxp0: <Intel Pro 10/100B/100+ Ethernet> port 0x3100-0x311f mem 0xfe800000-0xfe8fffff,0xfea00000-0xfea00fff irq 17 at device 4.0 on pci1
fxp0: Ethernet address 00:d0:b7:5f:b7:a8
fxp1: <Intel Pro 10/100B/100+ Ethernet> port 0x3120-0x313f mem 0xfe900000-0xfe9fffff,0xfea01000-0xfea01fff irq 18 at device 5.0 on pci1
fxp1: Ethernet address 00:d0:b7:5f:b7:a9
isab0: <ServerWorks IB6566 PCI to ISA bridge> at device 15.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <ServerWorks ROSB4 ATA33 controller> port 0x840-0x84f at device 15.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <OHCI USB controller> at 15.2 irq 16
pcib2: <ServerWorks NB6635 3.0LE host to PCI bridge> on motherboard
IOAPIC #1 intpin 12 -> irq 19
pci2: <PCI bus> on pcib2
ahc1: <Adaptec aic7896/97 Ultra2 SCSI adapter> port 0x4b00-0x4bff mem 0xf6fff000-0xf6ffffff irq 19 at device 3.0 on pci2
aic7896/97: Wide Channel A, SCSI Id=7, 32/255 SCBs
ahc2: <Adaptec aic7896/97 Ultra2 SCSI adapter> port 0x4c00-0x4cff mem 0xf6ffe000-0xf6ffefff irq 19 at device 3.1 on pci2
aic7896/97: Wide Channel B, SCSI Id=7, 32/255 SCBs
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: Broken MP table detected: 8254 is not connected to IOAPIC #0 intpin 2
APIC_IO: routing 8254 via 8259 and IOAPIC #0 intpin 0
IP packet filtering initialized, divert disabled, rule-based forwarding disabled, default to accept, logging limited to 100 packets/entry by default
SMP: AP CPU #1 Launched!
acd0: CDROM <CRD-8400B> at ata0-master using PIO4
Waiting 3 seconds for SCSI devices to settle
sa0 at ahc0 bus 0 target 0 lun 0
sa0: <SONY TSL-A500C L100> Removable Sequential Access SCSI-2 device
sa0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit)
pass4 at ahc1 bus 0 target 15 lun 0
pass4: <IBM LN V1.2Rack B004> Fixed Processor SCSI-2 device
pass4: 3.300MB/s transfers
pass9 at ahc2 bus 0 target 8 lun 0
pass9: <NEXSAN Xraid 8J SAF-TE 0.1s> Fixed Processor SCSI-2 device
pass9: 3.300MB/s transfers
da2 at ahc2 bus 0 target 0 lun 0
da2: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da2: 40.000MB/s transfers (20.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da2: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da5 at ahc2 bus 0 target 3 lun 0
da5: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da5: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da5: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da4 at ahc2 bus 0 target 2 lun 0
da4: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da4: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da4: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da3 at ahc2 bus 0 target 1 lun 0
da3: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da3: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da3: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da9 at ahc2 bus 0 target 12 lun 0
da9: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da9: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da9: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da8 at ahc2 bus 0 target 11 lun 0
da8: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da8: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da8: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da7 at ahc2 bus 0 target 10 lun 0
da7: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da7: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da7: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da6 at ahc2 bus 0 target 9 lun 0
da6: <IBM DMVS36D 0250> Fixed Direct Access SCSI-3 device
da6: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da6: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)
da0 at ahc1 bus 0 target 0 lun 0
da0: <IBM-PSG ST39175LC !# 0419> Fixed Direct Access SCSI-2 device
da0: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da0: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C)
da1 at ahc1 bus 0 target 1 lun 0
da1: <IBM-PSG ST39175LC !# 0419> Fixed Direct Access SCSI-2 device
da1: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da1: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C)
ch0 at ahc0 bus 0 target 0 lun 1
ch0: <SONY TSL-A500C L100> Removable Changer SCSI-2 device
ch0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit)
ch0: 4 slots, 1 drive, 1 picker, 0 portals
Mounting root from ufs:/dev/da0s1a
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