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    Subjectlinux-2.6.28-rc2 regression : oprofile doesnt work anymore ?
    Hi

    I tried to start my favorite tool, and discovered it wont fly on my HP BL460C G1

    It samples few events then, seems to stop (no more NMI), other than that, machine
    still running correctly.

    (8 cpus like that one

    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 23
    model name : Intel(R) Xeon(R) CPU E5450 @ 3.00GHz
    stepping : 6
    cpu MHz : 3000.253
    cache size : 6144 KB
    physical id : 0
    siblings : 4
    core id : 0
    cpu cores : 4
    apicid : 0
    initial apicid : 0
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 10
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm tpr_shadow vnmi flexpriority
    bogomips : 6000.50
    clflush size : 64
    power management:

    It is working correctly on 2.6.27

    I tried a git bisect but quickly found a point where machine was not useable...
    (partly because of the problem with the VPD problem on 5708S (PCI: Limit VPD length for Broadcom 5708S)

    # opcontrol --deinit
    Stopping profiling.
    Killing daemon.
    # rm -rf /var/lib/oprofile/samples/current
    # opcontrol --vmlinux=vmlinux --start
    Using 2.6+ OProfile kernel interface.
    Reading module info.
    Using log file /var/lib/oprofile/samples/oprofiled.log
    Daemon started.
    Profiler running.

    # opcontrol --dump; opreport
    CPU: Core 2, speed 3000.25 MHz (estimated)
    Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 10000
    CPU_CLK_UNHALT...|
    samples| %|
    ------------------
    17 80.9524 vmlinux
    2 9.5238 libc-2.3.4.so
    1 4.7619 bash
    1 4.7619 ld-2.3.4.so
    # opcontrol --dump; opreport
    CPU: Core 2, speed 3000.25 MHz (estimated)
    Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 10000
    CPU_CLK_UNHALT...|
    samples| %|
    ------------------
    17 80.9524 vmlinux
    2 9.5238 libc-2.3.4.so
    1 4.7619 bash
    1 4.7619 ld-2.3.4.so
    # opcontrol --dump; opreport
    CPU: Core 2, speed 3000.25 MHz (estimated)
    Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 10000
    CPU_CLK_UNHALT...|
    samples| %|
    ------------------
    17 80.9524 vmlinux
    2 9.5238 libc-2.3.4.so
    1 4.7619 bash
    1 4.7619 ld-2.3.4.so

    # grep NMI /proc/interrupts
    NMI: 8 2 2 6 11 7 6 5 Non-maskable interrupts
    # grep NMI /proc/interrupts
    NMI: 8 2 2 6 11 7 6 5 Non-maskable interrupts
    # grep NMI /proc/interrupts
    NMI: 8 2 2 6 11 7 6 5 Non-maskable interrupts
    # grep NMI /proc/interrupts
    NMI: 8 2 2 6 11 7 6 5 Non-maskable interrupts


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