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