Documentation/trace/postprocess/decode_msr.py

   1 #!/usr/bin/env python
   2 # add symbolic names to read_msr / write_msr in trace
   3 # decode_msr msr-index.h < trace
   4 import sys
   5 import re
   6
   7 msrs = dict()
   8
   9 with open(sys.argv[1] if len(sys.argv) > 1 else "msr-index.h", "r") as f:
  10         for j in f:
  11                 m = re.match(r'#define (MSR_\w+)\s+(0x[0-9a-fA-F]+)', j)
  12                 if m:
  13                         msrs[int(m.group(2), 16)] = m.group(1)
  14
  15 extra_ranges = (
  16         ( "MSR_LASTBRANCH_%d_FROM_IP", 0x680, 0x69F ),
  17         ( "MSR_LASTBRANCH_%d_TO_IP", 0x6C0, 0x6DF ),
  18         ( "LBR_INFO_%d", 0xdc0, 0xddf ),
  19 )
  20
  21 for j in sys.stdin:
  22         m = re.search(r'(read|write)_msr:\s+([0-9a-f]+)', j)
  23         if m:
  24                 r = None
  25                 num = int(m.group(2), 16)
  26                 if num in msrs:
  27                         r = msrs[num]
  28                 else:
  29                         for er in extra_ranges:
  30                                 if er[1] <= num <= er[2]:
  31                                         r = er[0] % (num - er[1],)
  32                                         break
  33                 if r:
  34                         j = j.replace(" " + m.group(2), " " + r + "(" + m.group(2) + ")")
  35         print j,
  36
  37