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1# Core.py - Python extension for perf script, core functions
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
9from collections import defaultdict
10
11def autodict():
12    return defaultdict(autodict)
13
14flag_fields = autodict()
15symbolic_fields = autodict()
16
17def define_flag_field(event_name, field_name, delim):
18    flag_fields[event_name][field_name]['delim'] = delim
19
20def define_flag_value(event_name, field_name, value, field_str):
21    flag_fields[event_name][field_name]['values'][value] = field_str
22
23def define_symbolic_field(event_name, field_name):
24    # nothing to do, really
25    pass
26
27def define_symbolic_value(event_name, field_name, value, field_str):
28    symbolic_fields[event_name][field_name]['values'][value] = field_str
29
30def flag_str(event_name, field_name, value):
31    string = ""
32
33    if flag_fields[event_name][field_name]:
34	print_delim = 0
35        keys = flag_fields[event_name][field_name]['values'].keys()
36        keys.sort()
37        for idx in keys:
38            if not value and not idx:
39                string += flag_fields[event_name][field_name]['values'][idx]
40                break
41            if idx and (value & idx) == idx:
42                if print_delim and flag_fields[event_name][field_name]['delim']:
43                    string += " " + flag_fields[event_name][field_name]['delim'] + " "
44                string += flag_fields[event_name][field_name]['values'][idx]
45                print_delim = 1
46                value &= ~idx
47
48    return string
49
50def symbol_str(event_name, field_name, value):
51    string = ""
52
53    if symbolic_fields[event_name][field_name]:
54        keys = symbolic_fields[event_name][field_name]['values'].keys()
55        keys.sort()
56        for idx in keys:
57            if not value and not idx:
58		string = symbolic_fields[event_name][field_name]['values'][idx]
59                break
60	    if (value == idx):
61		string = symbolic_fields[event_name][field_name]['values'][idx]
62                break
63
64    return string
65
66trace_flags = { 0x00: "NONE", \
67                    0x01: "IRQS_OFF", \
68                    0x02: "IRQS_NOSUPPORT", \
69                    0x04: "NEED_RESCHED", \
70                    0x08: "HARDIRQ", \
71                    0x10: "SOFTIRQ" }
72
73def trace_flag_str(value):
74    string = ""
75    print_delim = 0
76
77    keys = trace_flags.keys()
78
79    for idx in keys:
80	if not value and not idx:
81	    string += "NONE"
82	    break
83
84	if idx and (value & idx) == idx:
85	    if print_delim:
86		string += " | ";
87	    string += trace_flags[idx]
88	    print_delim = 1
89	    value &= ~idx
90
91    return string
92
93
94def taskState(state):
95	states = {
96		0 : "R",
97		1 : "S",
98		2 : "D",
99		64: "DEAD"
100	}
101
102	if state not in states:
103		return "Unknown"
104
105	return states[state]
106
107
108class EventHeaders:
109	def __init__(self, common_cpu, common_secs, common_nsecs,
110		     common_pid, common_comm, common_callchain):
111		self.cpu = common_cpu
112		self.secs = common_secs
113		self.nsecs = common_nsecs
114		self.pid = common_pid
115		self.comm = common_comm
116		self.callchain = common_callchain
117
118	def ts(self):
119		return (self.secs * (10 ** 9)) + self.nsecs
120
121	def ts_format(self):
122		return "%d.%d" % (self.secs, int(self.nsecs / 1000))
123