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38 lines
700 B
Plaintext
38 lines
700 B
Plaintext
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The x86 kernel supports tracing most MSR (Model Specific Register) accesses.
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To see the definition of the MSRs on Intel systems please see the SDM
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at http://www.intel.com/sdm (Volume 3)
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Available trace points:
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/sys/kernel/debug/tracing/events/msr/
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Trace MSR reads
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read_msr
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msr: MSR number
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val: Value written
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failed: 1 if the access failed, otherwise 0
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Trace MSR writes
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write_msr
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msr: MSR number
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val: Value written
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failed: 1 if the access failed, otherwise 0
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Trace RDPMC in kernel
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rdpmc
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The trace data can be post processed with the postprocess/decode_msr.py script
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cat /sys/kernel/debug/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
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to add symbolic MSR names.
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