101 lines · python
1# mem-phys-addr.py: Resolve physical address samples2# SPDX-License-Identifier: GPL-2.03#4# Copyright (c) 2018, Intel Corporation.5 6from __future__ import division7from __future__ import print_function8 9import os10import sys11import struct12import re13import bisect14import collections15 16sys.path.append(os.environ['PERF_EXEC_PATH'] + \17 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')18 19#physical address ranges for System RAM20system_ram = []21#physical address ranges for Persistent Memory22pmem = []23#file object for proc iomem24f = None25#Count for each type of memory26load_mem_type_cnt = collections.Counter()27#perf event name28event_name = None29 30def parse_iomem():31 global f32 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 sorted64 position = bisect.bisect(system_ram, phys_addr)65 if position % 2 == 0:66 return False67 return True68 69def is_persistent_mem(phys_addr):70 position = bisect.bisect(pmem, phys_addr)71 if position % 2 == 0:72 return False73 return True74 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 all85 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_name98 if event_name == None:99 event_name = name100 load_mem_type_cnt[find_memory_type(phys_addr)] += 1101