| Kan Liang | 41013f0 | 2018-01-04 12:59:55 -0800 | [diff] [blame] | 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 | import os |
| 8 | import sys |
| 9 | import struct |
| 10 | import re |
| 11 | import bisect |
| 12 | import collections |
| 13 | |
| 14 | sys.path.append(os.environ['PERF_EXEC_PATH'] + \ |
| 15 | '/scripts/python/Perf-Trace-Util/lib/Perf/Trace') |
| 16 | |
| 17 | #physical address ranges for System RAM |
| 18 | system_ram = [] |
| 19 | #physical address ranges for Persistent Memory |
| 20 | pmem = [] |
| 21 | #file object for proc iomem |
| 22 | f = None |
| 23 | #Count for each type of memory |
| 24 | load_mem_type_cnt = collections.Counter() |
| 25 | #perf event name |
| 26 | event_name = None |
| 27 | |
| 28 | def parse_iomem(): |
| 29 | global f |
| 30 | f = open('/proc/iomem', 'r') |
| 31 | for i, j in enumerate(f): |
| 32 | m = re.split('-|:',j,2) |
| 33 | if m[2].strip() == 'System RAM': |
| 34 | system_ram.append(long(m[0], 16)) |
| 35 | system_ram.append(long(m[1], 16)) |
| 36 | if m[2].strip() == 'Persistent Memory': |
| 37 | pmem.append(long(m[0], 16)) |
| 38 | pmem.append(long(m[1], 16)) |
| 39 | |
| 40 | def print_memory_type(): |
| 41 | print "Event: %s" % (event_name) |
| 42 | print "%-40s %10s %10s\n" % ("Memory type", "count", "percentage"), |
| 43 | print "%-40s %10s %10s\n" % ("----------------------------------------", \ |
| 44 | "-----------", "-----------"), |
| 45 | total = sum(load_mem_type_cnt.values()) |
| 46 | for mem_type, count in sorted(load_mem_type_cnt.most_common(), \ |
| 47 | key = lambda(k, v): (v, k), reverse = True): |
| 48 | print "%-40s %10d %10.1f%%\n" % (mem_type, count, 100 * count / total), |
| 49 | |
| 50 | def trace_begin(): |
| 51 | parse_iomem() |
| 52 | |
| 53 | def trace_end(): |
| 54 | print_memory_type() |
| 55 | f.close() |
| 56 | |
| 57 | def is_system_ram(phys_addr): |
| 58 | #/proc/iomem is sorted |
| 59 | position = bisect.bisect(system_ram, phys_addr) |
| 60 | if position % 2 == 0: |
| 61 | return False |
| 62 | return True |
| 63 | |
| 64 | def is_persistent_mem(phys_addr): |
| 65 | position = bisect.bisect(pmem, phys_addr) |
| 66 | if position % 2 == 0: |
| 67 | return False |
| 68 | return True |
| 69 | |
| 70 | def find_memory_type(phys_addr): |
| 71 | if phys_addr == 0: |
| 72 | return "N/A" |
| 73 | if is_system_ram(phys_addr): |
| 74 | return "System RAM" |
| 75 | |
| 76 | if is_persistent_mem(phys_addr): |
| 77 | return "Persistent Memory" |
| 78 | |
| 79 | #slow path, search all |
| 80 | f.seek(0, 0) |
| 81 | for j in f: |
| 82 | m = re.split('-|:',j,2) |
| 83 | if long(m[0], 16) <= phys_addr <= long(m[1], 16): |
| 84 | return m[2] |
| 85 | return "N/A" |
| 86 | |
| 87 | def process_event(param_dict): |
| 88 | name = param_dict["ev_name"] |
| 89 | sample = param_dict["sample"] |
| 90 | phys_addr = sample["phys_addr"] |
| 91 | |
| 92 | global event_name |
| 93 | if event_name == None: |
| 94 | event_name = name |
| 95 | load_mem_type_cnt[find_memory_type(phys_addr)] += 1 |