1 # mem-phys-addr.py: Resolve physical address samples
2 # SPDX-License-Identifier: GPL-2.0
3 #
4 # Copyright (c) 2018, Intel Corporation.
5
6 from __future__ import division
7 from __future__ import print_function
8
9 import os
10 import sys
11 import struct
12 import re
13 import bisect
14 import collections
15
16 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
17 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
18
19 #physical address ranges for System RAM
20 system_ram = []
21 #physical address ranges for Persistent Memory
22 pmem = []
23 #file object for proc iomem
24 f = None
25 #Count for each type of memory
26 load_mem_type_cnt = collections.Counter()
27 #perf event name
28 event_name = None
29
30 def parse_iomem():
31 global f
32 f = open('/proc/iomem', 'r')
33 for i, j in enumerate(f):
34 m = re.split('-|:',j,2)
35 if m[2].strip() == 'System RAM':
36 system_ram.append(int(m[0], 16))
37 system_ram.append(int(m[1], 16))
38 if m[2].strip() == 'Persistent Memory':
39 pmem.append(int(m[0], 16))
40 pmem.append(int(m[1], 16))
41
42 def print_memory_type():
43 print("Event: %s" % (event_name))
44 print("%-40s %10s %10s\n" % ("Memory type", "count", "percentage"), end='')
45 print("%-40s %10s %10s\n" % ("----------------------------------------",
46 "-----------", "-----------"),
47 end='');
48 total = sum(load_mem_type_cnt.values())
49 for mem_type, count in sorted(load_mem_type_cnt.most_common(), \
50 key = lambda kv: (kv[1], kv[0]), reverse = True):
51 print("%-40s %10d %10.1f%%\n" %
52 (mem_type, count, 100 * count / total),
53 end='')
54
55 def trace_begin():
56 parse_iomem()
57
58 def trace_end():
59 print_memory_type()
60 f.close()
61
62 def is_system_ram(phys_addr):
63 #/proc/iomem is sorted
64 position = bisect.bisect(system_ram, phys_addr)
65 if position % 2 == 0:
66 return False
67 return True
68
69 def is_persistent_mem(phys_addr):
70 position = bisect.bisect(pmem, phys_addr)
71 if position % 2 == 0:
72 return False
73 return True
74
75 def find_memory_type(phys_addr):
76 if phys_addr == 0:
77 return "N/A"
78 if is_system_ram(phys_addr):
79 return "System RAM"
80
81 if is_persistent_mem(phys_addr):
82 return "Persistent Memory"
83
84 #slow path, search all
85 f.seek(0, 0)
86 for j in f:
87 m = re.split('-|:',j,2)
88 if int(m[0], 16) <= phys_addr <= int(m[1], 16):
89 return m[2]
90 return "N/A"
91
92 def process_event(param_dict):
93 name = param_dict["ev_name"]
94 sample = param_dict["sample"]
95 phys_addr = sample["phys_addr"]
96
97 global event_name
98 if event_name == None:
99 event_name = name
100 load_mem_type_cnt[find_memory_type(phys_addr)] += 1
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