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# mem-phys-addr.py: Resolve physical address samples
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2018, Intel Corporation.
from __future__ import division
from __future__ import print_function
import os
import sys
import struct
import re
import bisect
import collections
sys.path.append(os.environ['PERF_EXEC_PATH'] + \
'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
#physical address ranges for System RAM
system_ram = []
#physical address ranges for Persistent Memory
pmem = []
#file object for proc iomem
f = None
#Count for each type of memory
load_mem_type_cnt = collections.Counter()
#perf event name
event_name = None
def parse_iomem():
global f
f = open('/proc/iomem', 'r')
for i, j in enumerate(f):
m = re.split('-|:',j,2)
if m[2].strip() == 'System RAM':
system_ram.append(int(m[0], 16))
system_ram.append(int(m[1], 16))
if m[2].strip() == 'Persistent Memory':
pmem.append(int(m[0], 16))
pmem.append(int(m[1], 16))
def print_memory_type():
print("Event: %s" % (event_name))
print("%-40s %10s %10s\n" % ("Memory type", "count", "percentage"), end='')
print("%-40s %10s %10s\n" % ("----------------------------------------",
"-----------", "-----------"),
end='');
total = sum(load_mem_type_cnt.values())
for mem_type, count in sorted(load_mem_type_cnt.most_common(), \
key = lambda kv: (kv[1], kv[0]), reverse = True):
print("%-40s %10d %10.1f%%\n" %
(mem_type, count, 100 * count / total),
end='')
def trace_begin():
parse_iomem()
def trace_end():
print_memory_type()
f.close()
def is_system_ram(phys_addr):
#/proc/iomem is sorted
position = bisect.bisect(system_ram, phys_addr)
if position % 2 == 0:
return False
return True
def is_persistent_mem(phys_addr):
position = bisect.bisect(pmem, phys_addr)
if position % 2 == 0:
return False
return True
def find_memory_type(phys_addr):
if phys_addr == 0:
return "N/A"
if is_system_ram(phys_addr):
return "System RAM"
if is_persistent_mem(phys_addr):
return "Persistent Memory"
#slow path, search all
f.seek(0, 0)
for j in f:
m = re.split('-|:',j,2)
if int(m[0], 16) <= phys_addr <= int(m[1], 16):
return m[2]
return "N/A"
def process_event(param_dict):
name = param_dict["ev_name"]
sample = param_dict["sample"]
phys_addr = sample["phys_addr"]
global event_name
if event_name == None:
event_name = name
load_mem_type_cnt[find_memory_type(phys_addr)] += 1
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