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    SubjectRe: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U1
    On Thu, 14 Oct 2004 16:31:31 +0200
    Ingo Molnar <> wrote:

    > i have released the -U1 PREEMPT_REALTIME patch:


    with the help of Paul Davis i think i have found what's causing the jackd
    FP exception. It seems to be a bug in the kernel when PREEMPT_REALTIME is

    ~$ cat /proc/cpuinfo|grep cpu
    cpu family : 6
    cpu MHz : 0.001
    cpuid level : 1

    Mhz == 0.001? Hrmm. No wonder jackd was freaking out in its timing code..
    The real cpu speed is 1.2ghz.


    P.S.: Will retry with U3, to see if this persists.

    dmesg output:

    Linux version 2.6.9-rc4-mm1-VP-U1-RT ( (gcc version 3.3.5 (Debian 1:3.3.5-1)) #3 Thu Oct 14 22:40:26 CEST 2004
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
    BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 0000000030000000 (usable)
    BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
    BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
    BIOS-e820: 00000000ffee0000 - 00000000fff00000 (reserved)
    BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
    768MB LOWMEM available.
    On node 0 totalpages: 196608
    DMA zone: 4096 pages, LIFO batch:1
    Normal zone: 192512 pages, LIFO batch:16
    HighMem zone: 0 pages, LIFO batch:1
    DMI 2.3 present.
    Built 1 zonelists
    Initializing CPU#0
    Kernel command line: BOOT_IMAGE=2.6.9-U0 ro root=1601
    PID hash table entries: 4096 (order: 12, 65536 bytes)
    Detected 1195.144 MHz processor.
    Using tsc for high-res timesource
    Console: colour VGA+ 80x25
    Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
    Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
    Memory: 776332k/786432k available (1673k kernel code, 9644k reserved, 482k data, 340k init, 0k highmem)
    Checking if this processor honours the WP bit even in supervisor mode... Ok.
    Calibrating delay loop... 2367.48 BogoMIPS (lpj=1183744)
    Security Scaffold v1.0.0 initialized
    Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
    CPU: After generic identify, caps: 0183f9ff c1c7f9ff 00000000 00000000
    CPU: After vendor identify, caps: 0183f9ff c1c7f9ff 00000000 00000000
    CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
    CPU: L2 Cache: 256K (64 bytes/line)
    CPU: After all inits, caps: 0183f9ff c1c7f9ff 00000000 00000020
    CPU: AMD Athlon(tm) Processor stepping 02
    Enabling fast FPU save and restore... done.
    Checking 'hlt' instruction... OK.
    ksoftirqd started up.
    NET: Registered protocol family 16
    PCI: PCI BIOS revision 2.10 entry at 0xfdb01, last bus=1
    PCI: Using configuration type 1
    mtrr: v2.0 (20020519)
    PCI: Probing PCI hardware
    PCI: Probing PCI hardware (bus 00)
    Uncovering SIS18 that hid as a SIS503 (compatible=1)
    Enabling SiS 96x SMBus.
    PCI: Using IRQ router SIS [1039/0018] at 0000:00:02.0
    PCI: IRQ 0 for device 0000:00:02.1 doesn't match PIRQ mask - try pci=usepirqmask
    apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac)
    Initializing Cryptographic API
    Real Time Clock Driver v1.12
    Non-volatile memory driver v1.2
    serio: i8042 AUX port at 0x60,0x64 irq 12
    serio: i8042 KBD port at 0x60,0x64 irq 1
    Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
    io scheduler noop registered
    io scheduler anticipatory registered
    io scheduler deadline registered
    io scheduler cfq registered
    RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
    Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    SIS5513: IDE controller at PCI slot 0000:00:02.5
    SIS5513: chipset revision 208
    SIS5513: not 100% native mode: will probe irqs later
    SIS5513: SiS735 ATA 100 (2nd gen) controller
    ide0: BM-DMA at 0xff00-0xff07, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xff08-0xff0f, BIOS settings: hdc:DMA, hdd:DMA
    Probing IDE interface ide0...
    hda: IC35L060AVER07-0, ATA DISK drive
    elevator: using anticipatory as default io scheduler
    ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    Probing IDE interface ide1...
    hdc: ST340823A, ATA DISK drive
    hdd: TDK CDRW121032, ATAPI CD/DVD-ROM drive
    ide1 at 0x170-0x177,0x376 on irq 15
    Probing IDE interface ide2...
    ide2: Wait for ready failed before probe !
    Probing IDE interface ide3...
    ide3: Wait for ready failed before probe !
    Probing IDE interface ide4...
    ide4: Wait for ready failed before probe !
    Probing IDE interface ide5...
    ide5: Wait for ready failed before probe !
    hda: max request size: 128KiB
    hda: 120103200 sectors (61492 MB) w/1916KiB Cache, CHS=65535/16/63, UDMA(100)
    hda: cache flushes not supported
    hda: hda1 hda2 hda3
    hdc: max request size: 128KiB
    hdc: Host Protected Area detected.
    current capacity is 78165360 sectors (40020 MB)
    native capacity is 78165361 sectors (40020 MB)
    hdc: Host Protected Area disabled.
    hdc: 78165361 sectors (40020 MB) w/1024KiB Cache, CHS=65535/16/63, UDMA(33)
    hdc: cache flushes not supported
    hdc: hdc1 hdc2
    hdd: ATAPI 32X CD-ROM CD-R/RW drive, 2048kB Cache, DMA
    Uniform CD-ROM driver Revision: 3.20
    mice: PS/2 mouse device common for all mice
    input: AT Translated Set 2 keyboard on isa0060/serio0
    input: ImExPS/2 Logitech Explorer Mouse on isa0060/serio1
    input: PC Speaker
    NET: Registered protocol family 2
    IP: routing cache hash table of 2048 buckets, 64Kbytes
    TCP: Hash tables configured (established 65536 bind 37449)
    NET: Registered protocol family 1
    NET: Registered protocol family 17
    EXT3-fs: mounted filesystem with ordered data mode.
    VFS: Mounted root (ext3 filesystem) readonly.
    Freeing unused kernel memory: 340k freed
    kjournald starting. Commit interval 5 seconds
    Adding 289160k swap on /dev/hda3. Priority:-1 extents:1
    EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
    EXT3 FS on hdc1, internal journal
    PCI: Found IRQ 5 for device 0000:00:0f.0
    sis900.c: v1.08.07 11/02/2003
    PCI: Found IRQ 10 for device 0000:00:03.0
    eth0: Realtek RTL8201 PHY transceiver found at address 1.
    eth0: Using transceiver found at address 1 as default
    eth0: SiS 900 PCI Fast Ethernet at 0xdc00, IRQ 10, 00:d0:09:e9:c1:0f.
    CSLIP: code copyright 1989 Regents of the University of California
    PPP generic driver version 2.4.2
    PPP Deflate Compression module registered
    PPP BSD Compression module registered
    kjournald starting. Commit interval 5 seconds
    EXT3 FS on hda1, internal journal
    EXT3-fs: mounted filesystem with ordered data mode.
    kjournald starting. Commit interval 5 seconds
    EXT3 FS on hda2, internal journal
    EXT3-fs: mounted filesystem with ordered data mode.
    kjournald starting. Commit interval 5 seconds
    EXT3 FS on hdc2, internal journal
    EXT3-fs: mounted filesystem with ordered data mode.

    complete /proc/cpuinfo

    processor : 0
    vendor_id : AuthenticAMD
    cpu family : 6
    model : 4
    model name : AMD Athlon(tm) Processor
    stepping : 2
    cpu MHz : 0.001
    cache size : 256 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 1
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
    bogomips : 2367.48

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