1================ 2MSR Trace Events 3================ 4 5The x86 kernel supports tracing most MSR (Model Specific Register) accesses. 6To see the definition of the MSRs on Intel systems please see the SDM 7at https://www.intel.com/sdm (Volume 3) 8 9Available trace points: 10 11/sys/kernel/tracing/events/msr/ 12 13Trace MSR reads: 14 15read_msr 16 17 - msr: MSR number 18 - val: Value written 19 - failed: 1 if the access failed, otherwise 0 20 21 22Trace MSR writes: 23 24write_msr 25 26 - msr: MSR number 27 - val: Value written 28 - failed: 1 if the access failed, otherwise 0 29 30 31Trace RDPMC in kernel: 32 33rdpmc 34 35The trace data can be post processed with the postprocess/decode_msr.py script:: 36 37 cat /sys/kernel/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h 38 39to add symbolic MSR names. 40 41