xref: /linux/tools/perf/scripts/python/mem-phys-addr.py (revision e7d759f31ca295d589f7420719c311870bb3166f) 
1# mem-phys-addr.py: Resolve physical address samples
2# SPDX-License-Identifier: GPL-2.0
3#
4# Copyright (c) 2018, Intel Corporation.
5
6from __future__ import division
7from __future__ import print_function
8
9import os
10import sys
11import struct
12import re
13import bisect
14import collections
15
16sys.path.append(os.environ['PERF_EXEC_PATH'] + \
17	'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
18
19#physical address ranges for System RAM
20system_ram = []
21#physical address ranges for Persistent Memory
22pmem = []
23#file object for proc iomem
24f = None
25#Count for each type of memory
26load_mem_type_cnt = collections.Counter()
27#perf event name
28event_name = None
29
30def 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
42def 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
55def trace_begin():
56	parse_iomem()
57
58def trace_end():
59	print_memory_type()
60	f.close()
61
62def 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
69def is_persistent_mem(phys_addr):
70	position = bisect.bisect(pmem, phys_addr)
71	if position % 2 == 0:
72		return False
73	return True
74
75def 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
92def 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
101