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    Subjectperf counters: problem with perf record
    Hello,

    I have a problem with the new kernel perf tools in kernel 2.6.31.6 (very
    nice tools by the way). I like to monitor the cache-misses of a program.
    "perf stat -e cache-misses program" works without problems, but I can't
    get "perf record -e cache-misses program" working (even running as root
    and CONFIG_PERF_COUNTERS=y):

    Error: perfcounter syscall returned with -1 (Operation not supported)
    Fatal: No CONFIG_PERF_COUNTERS=y kernel support configured?

    strace of "perf stat":
    SYS_336(0x8508da0, 0x1074, 0xffffffff, 0xffffffff, 0) = 3

    strace of "perf record":
    SYS_336(0x8508da0, 0xf85, 0xffffffff, 0xffffffff, 0) = -1 EOPNOTSUPP
    (Operation not supported)

    My CPU is a "Intel(R) Pentium(R) M processor 1.80GHz":
    [ 0.004337] p6 PMU driver.
    [ 0.004343] ... version: 0
    [ 0.004345] ... bit width: 32
    [ 0.004347] ... generic counters: 2
    [ 0.004349] ... value mask: 00000000ffffffff
    [ 0.004351] ... max period: 000000007fffffff
    [ 0.004353] ... fixed-purpose counters: 0
    [ 0.004355] ... counter mask: 0000000000000003

    Best regards,
    Simon




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