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