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40 lines
783 B
40 lines
783 B
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MSR Trace Events |
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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 https://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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