Messages in this thread | | | Date | Sun, 15 Nov 2009 03:14:03 +1000 | From | Simon Kämpflein <> | Subject | perf counters: problem with perf record |
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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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