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# Core.py - Python extension for perf trace, core functions
#
# Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>
#
# This software may be distributed under the terms of the GNU General
# Public License ("GPL") version 2 as published by the Free Software
# Foundation.
from collections import defaultdict
def autodict():
return defaultdict(autodict)
flag_fields = autodict()
symbolic_fields = autodict()
def define_flag_field(event_name, field_name, delim):
flag_fields[event_name][field_name]['delim'] = delim
def define_flag_value(event_name, field_name, value, field_str):
flag_fields[event_name][field_name]['values'][value] = field_str
def define_symbolic_field(event_name, field_name):
# nothing to do, really
pass
def define_symbolic_value(event_name, field_name, value, field_str):
symbolic_fields[event_name][field_name]['values'][value] = field_str
def flag_str(event_name, field_name, value):
string = ""
if flag_fields[event_name][field_name]:
print_delim = 0
keys = flag_fields[event_name][field_name]['values'].keys()
keys.sort()
for idx in keys:
if not value and not idx:
string += flag_fields[event_name][field_name]['values'][idx]
break
if idx and (value & idx) == idx:
if print_delim and flag_fields[event_name][field_name]['delim']:
string += " " + flag_fields[event_name][field_name]['delim'] + " "
string += flag_fields[event_name][field_name]['values'][idx]
print_delim = 1
value &= ~idx
return string
def symbol_str(event_name, field_name, value):
string = ""
if symbolic_fields[event_name][field_name]:
keys = symbolic_fields[event_name][field_name]['values'].keys()
keys.sort()
for idx in keys:
if not value and not idx:
string = symbolic_fields[event_name][field_name]['values'][idx]
break
if (value == idx):
string = symbolic_fields[event_name][field_name]['values'][idx]
break
return string
trace_flags = { 0x00: "NONE", \
0x01: "IRQS_OFF", \
0x02: "IRQS_NOSUPPORT", \
0x04: "NEED_RESCHED", \
0x08: "HARDIRQ", \
0x10: "SOFTIRQ" }
def trace_flag_str(value):
string = ""
print_delim = 0
keys = trace_flags.keys()
for idx in keys:
if not value and not idx:
string += "NONE"
break
if idx and (value & idx) == idx:
if print_delim:
string += " | ";
string += trace_flags[idx]
print_delim = 1
value &= ~idx
return string
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