1 # Util.py - Python extension for perf script, miscellaneous utility code
2 #
3 # Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>
4 #
5 # This software may be distributed under the terms of the GNU General
6 # Public License ("GPL") version 2 as published by the Free Software
7 # Foundation.
8 from __future__ import print_function
9
10 import errno, os
11
12 FUTEX_WAIT = 0
13 FUTEX_WAKE = 1
14 FUTEX_PRIVATE_FLAG = 128
15 FUTEX_CLOCK_REALTIME = 256
16 FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
17
18 NSECS_PER_SEC = 1000000000
19
20 def avg(total, n):
21 return total / n
22
23 def nsecs(secs, nsecs):
24 return secs * NSECS_PER_SEC + nsecs
25
26 def nsecs_secs(nsecs):
27 return nsecs / NSECS_PER_SEC
28
29 def nsecs_nsecs(nsecs):
30 return nsecs % NSECS_PER_SEC
31
32 def nsecs_str(nsecs):
33 str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),
34 return str
35
36 def add_stats(dict, key, value):
37 if key not in dict:
38 dict[key] = (value, value, value, 1)
39 else:
40 min, max, avg, count = dict[key]
41 if value < min:
42 min = value
43 if value > max:
44 max = value
45 avg = (avg + value) / 2
46 dict[key] = (min, max, avg, count + 1)
47
48 def clear_term():
49 print("\x1b[H\x1b[2J")
50
51 audit_package_warned = False
52
53 try:
54 import audit
55 machine_to_id = {
56 'x86_64': audit.MACH_86_64,
57 'aarch64': audit.MACH_AARCH64,
58 'alpha' : audit.MACH_ALPHA,
59 'ia64' : audit.MACH_IA64,
60 'ppc' : audit.MACH_PPC,
61 'ppc64' : audit.MACH_PPC64,
62 'ppc64le' : audit.MACH_PPC64LE,
63 's390' : audit.MACH_S390,
64 's390x' : audit.MACH_S390X,
65 'i386' : audit.MACH_X86,
66 'i586' : audit.MACH_X86,
67 'i686' : audit.MACH_X86,
68 }
69 try:
70 machine_to_id['armeb'] = audit.MACH_ARMEB
71 except:
72 pass
73 machine_id = machine_to_id[os.uname()[4]]
74 except:
75 if not audit_package_warned:
76 audit_package_warned = True
77 print("Install the python-audit package to get syscall names.\n"
78 "For example:\n # apt-get install python3-audit (Ubuntu)"
79 "\n # yum install python3-audit (Fedora)"
80 "\n etc.\n")
81
82 def syscall_name(id):
83 try:
84 return audit.audit_syscall_to_name(id, machine_id)
85 except:
86 return str(id)
87
88 def strerror(nr):
89 try:
90 return errno.errorcode[abs(nr)]
91 except:
92 return "Unknown %d errno" % nr
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