Re: [Xenomai-core] nervous nmi-watchdog

[Jan Kiszka <jan.kiszka@domain.hid>]

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Philippe Gerum wrote:
> On Sun, 2006-07-09 at 14:50 +0200, Gilles Chanteperdrix wrote:
>> Philippe Gerum wrote:
>>  > > I never observe this on my dual PIII whereas I always have the NMI
>>  > > watchdog option enabled. Are you running with or without the tracer ?
>>  > > 
>>  > 
>>  > w/o.
>>
>> enabling xeno nmi watchdog whereas the nucleus module is built-in break
>> Linux nmi watchdog test. Maybe some setups are not done at Linux level
>> when this test fails, which could explain some weird behaviour
>> afterwards.
>>
>> Do you have the message:
>> Testing NMI watchdog... CPU#0: NMI appears to be stuck (x->y)!
>>
>> In Linux boot messages ?
> 
> Nope. The NMI test looks ok.
> 
> Linux version 2.6.17-ipipe (rpm@xenomai.org) (gcc version 3.3.3 (Debian
> 20040321)) #1 SMP Tue Jul 11 03:17:18 CEST 2006
> BIOS-provided physical RAM map:
>  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
>  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
>  BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
>  BIOS-e820: 0000000000100000 - 000000003fffd000 (usable)
>  BIOS-e820: 000000003fffd000 - 000000003ffff000 (ACPI data)
>  BIOS-e820: 000000003ffff000 - 0000000040000000 (ACPI NVS)
>  BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
>  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
>  BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
> 127MB HIGHMEM available.
> 896MB LOWMEM available.
> found SMP MP-table at 000f6e80
> On node 0 totalpages: 262141
>   DMA zone: 4096 pages, LIFO batch:0
>   Normal zone: 225280 pages, LIFO batch:31
>   HighMem zone: 32765 pages, LIFO batch:7
> DMI 2.0 present.
> Intel MultiProcessor Specification v1.1
>     Virtual Wire compatibility mode.
> OEM ID: OEM00000 Product ID: PROD00000000 APIC at: 0xFEE00000
> Processor #1 6:8 APIC version 17
> Processor #0 6:8 APIC version 17
> I/O APIC #2 Version 17 at 0xFEC00000.
> Enabling APIC mode:  Flat.  Using 1 I/O APICs
> Processors: 2
> Allocating PCI resources starting at 50000000 (gap: 40000000:bec00000)
> Built 1 zonelists
> Kernel command line: root=/dev/hdc1 ro nmi_watchdog=1 vga=1 console=tty0
> console=ttyS0,115200
> mapped APIC to ffffd000 (fee00000)
> mapped IOAPIC to ffffc000 (fec00000)
> Enabling fast FPU save and restore... done.
> Enabling unmasked SIMD FPU exception support... done.
> Initializing CPU#0
> PID hash table entries: 4096 (order: 12, 16384 bytes)
> Detected 751.749 MHz processor.
> Using tsc for high-res timesource
> I-pipe 1.3-07: pipeline enabled.
> Console: colour VGA+ 80x50
> Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
> Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
> Memory: 1032916k/1048564k available (2491k kernel code, 15100k reserved,
> 743k data, 272k init, 131060k highmem)
> Checking if this processor honours the WP bit even in supervisor mode...
> Ok.
> Calibrating delay using timer specific routine.. 1505.65 BogoMIPS
> (lpj=7528285)
> Mount-cache hash table entries: 512
> CPU: After generic identify, caps: 0383fbff 00000000 00000000 00000000
> 00000000 00000000 00000000
> CPU: After vendor identify, caps: 0383fbff 00000000 00000000 00000000
> 00000000 00000000 00000000
> CPU: L1 I cache: 16K, L1 D cache: 16K
> CPU: L2 cache: 256K
> CPU: After all inits, caps: 0383fbff 00000000 00000000 00000040 00000000
> 00000000 00000000
> Checking 'hlt' instruction... OK.
> Freeing SMP alternatives: 28k freed
> CPU0: Intel Pentium III (Coppermine) stepping 03
> Booting processor 1/0 eip 2000
> Initializing CPU#1
> Calibrating delay using timer specific routine.. 1503.45 BogoMIPS
> (lpj=7517293)
> CPU: After generic identify, caps: 0383fbff 00000000 00000000 00000000
> 00000000 00000000 00000000
> CPU: After vendor identify, caps: 0383fbff 00000000 00000000 00000000
> 00000000 00000000 00000000
> CPU: L1 I cache: 16K, L1 D cache: 16K
> CPU: L2 cache: 256K
> CPU: After all inits, caps: 0383fbff 00000000 00000000 00000040 00000000
> 00000000 00000000
> CPU1: Intel Pentium III (Coppermine) stepping 03
> Total of 2 processors activated (3009.11 BogoMIPS).
> ExtINT not setup in hardware but reported by MP table
> ENABLING IO-APIC IRQs
> ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=0 pin2=0
> checking TSC synchronization across 2 CPUs: passed.
> Brought up 2 CPUs
> migration_cost=1897
> NET: Registered protocol family 16
> EISA bus registered
> PCI: PCI BIOS revision 2.10 entry at 0xf0730, last bus=1
> Setting up standard PCI resources
> usbcore: registered new driver usbfs
> usbcore: registered new driver hub
> PCI: Probing PCI hardware
> PCI: Probing PCI hardware (bus 00)
> PCI quirk: region e400-e43f claimed by PIIX4 ACPI
> PCI quirk: region e800-e80f claimed by PIIX4 SMB
> PIIX4 devres B PIO at 0290-0297
> Boot video device is 0000:01:00.0
> PCI: Using IRQ router PIIX/ICH [8086/7110] at 0000:00:04.0
> PCI: Bridge: 0000:00:01.0
>   IO window: disabled.
>   MEM window: e1800000-e2dfffff
>   PREFETCH window: e2f00000-e3ffffff
> NET: Registered protocol family 2
> IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
> TCP established hash table entries: 131072 (order: 9, 2621440 bytes)
> TCP bind hash table entries: 65536 (order: 8, 1310720 bytes)
> TCP: Hash tables configured (established 131072 bind 65536)
> TCP reno registered
> IA-32 Microcode Update Driver: v1.14 <tigran@domain.hid>
> I-pipe: Domain Xenomai registered.
> Xenomai: hal/x86 started.
> Xenomai: real-time nucleus v2.2-rc3 (Engines Of Creation) loaded.
> Xenomai: NMI watchdog started (threshold=100 us).
> Xenomai: starting native API services.
> Xenomai: starting POSIX services.
> Xenomai: starting RTDM services.
> highmem bounce pool size: 64 pages
> Installing knfsd (copyright (C) 1996 okir@domain.hid).
> io scheduler noop registered
> io scheduler anticipatory registered (default)
> io scheduler deadline registered
> io scheduler cfq registered
> Limiting direct PCI/PCI transfers.
> Linux agpgart interface v0.101 (c) Dave Jones
> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing
> disabled
> serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
> loop: loaded (max 8 devices)
> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> ide: Assuming 33MHz system bus speed for PIO modes; override with
> idebus=xx
> PIIX4: IDE controller at PCI slot 0000:00:04.1
> PIIX4: chipset revision 1
> PIIX4: not 100% native mode: will probe irqs later
>     ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:pio, hdb:pio
>     ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:pio
> Probing IDE interface ide0...
> Probing IDE interface ide1...
> hdc: SAMSUNG SV2044D, ATA DISK drive
> ide1 at 0x170-0x177,0x376 on irq 15
> hdc: max request size: 128KiB
> hdc: 39862368 sectors (20409 MB) w/472KiB Cache, CHS=39546/16/63,
> UDMA(33)
> hdc: cache flushes not supported
>  hdc: hdc1 hdc2
> usbmon: debugfs is not available
> serio: i8042 AUX port at 0x60,0x64 irq 12
> serio: i8042 KBD port at 0x60,0x64 irq 1
> mice: PS/2 mouse device common for all mice
> EISA: Probing bus 0 at eisa.0
> TCP bic registered
> NET: Registered protocol family 1
> NET: Registered protocol family 17
> Testing NMI watchdog ... <6>input: AT Raw Set 2 keyboard
> as /class/input/input0
> OK.
> Starting balanced_irq
> Using IPI Shortcut mode
> kjournald starting.  Commit interval 5 seconds
> EXT3-fs: mounted filesystem with ordered data mode.
> VFS: Mounted root (ext3 filesystem) readonly.
> Freeing unused kernel memory: 272k freed
> EXT3 FS on hdc1, internal journal
> kjournald starting.  Commit interval 5 seconds
> EXT3 FS on hdc2, internal journal
> EXT3-fs: mounted filesystem with ordered data mode.
> 3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
> 0000:00:09.0: 3Com PCI 3c980C Python-T at f880e000.
> 0000:00:0a.0: 3Com PCI 3c980C Python-T at f8810000.
> eth0:  setting half-duplex.
> netconsole: local port 6665
> netconsole: interface eth0
> netconsole: remote port 6666
> netconsole: remote IP 192.168.0.8
> netconsole: remote ethernet address 00:11:2f:0c:f1:ca
> netconsole: local IP 192.168.0.7
> netconsole: network logging started
> 
> 

I can confirm the failing NMI test here on my notebook with both nucleus
and native skin built into the kernel. I haven't seen false positive
NMIs yet, but the tracer is still on. Will switch off and re-check.

Jan


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