0001 ================
0002 MSR Trace Events
0003 ================
0004
0005 The x86 kernel supports tracing most MSR (Model Specific Register) accesses.
0006 To see the definition of the MSRs on Intel systems please see the SDM
0007 at https://www.intel.com/sdm (Volume 3)
0008
0009 Available trace points:
0010
0011 /sys/kernel/debug/tracing/events/msr/
0012
0013 Trace MSR reads:
0014
0015 read_msr
0016
0017 - msr: MSR number
0018 - val: Value written
0019 - failed: 1 if the access failed, otherwise 0
0020
0021
0022 Trace MSR writes:
0023
0024 write_msr
0025
0026 - msr: MSR number
0027 - val: Value written
0028 - failed: 1 if the access failed, otherwise 0
0029
0030
0031 Trace RDPMC in kernel:
0032
0033 rdpmc
0034
0035 The trace data can be post processed with the postprocess/decode_msr.py script::
0036
0037 cat /sys/kernel/debug/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
0038
0039 to add symbolic MSR names.
0040
