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      1 # Core.py - Python extension for perf script, core functions
      2 #
      3 # Copyright (C) 2010 by Tom Zanussi <tzanussi (at] 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 
      9 from collections import defaultdict
     10 
     11 def autodict():
     12     return defaultdict(autodict)
     13 
     14 flag_fields = autodict()
     15 symbolic_fields = autodict()
     16 
     17 def define_flag_field(event_name, field_name, delim):
     18     flag_fields[event_name][field_name]['delim'] = delim
     19 
     20 def define_flag_value(event_name, field_name, value, field_str):
     21     flag_fields[event_name][field_name]['values'][value] = field_str
     22 
     23 def define_symbolic_field(event_name, field_name):
     24     # nothing to do, really
     25     pass
     26 
     27 def define_symbolic_value(event_name, field_name, value, field_str):
     28     symbolic_fields[event_name][field_name]['values'][value] = field_str
     29 
     30 def 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 
     50 def 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 
     66 trace_flags = { 0x00: "NONE", \
     67                     0x01: "IRQS_OFF", \
     68                     0x02: "IRQS_NOSUPPORT", \
     69                     0x04: "NEED_RESCHED", \
     70                     0x08: "HARDIRQ", \
     71                     0x10: "SOFTIRQ" }
     72 
     73 def 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 
     94 def 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 
    108 class EventHeaders:
    109 	def __init__(self, common_cpu, common_secs, common_nsecs,
    110 		     common_pid, common_comm):
    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 
    117 	def ts(self):
    118 		return (self.secs * (10 ** 9)) + self.nsecs
    119 
    120 	def ts_format(self):
    121 		return "%d.%d" % (self.secs, int(self.nsecs / 1000))
    122