Core.py

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# Core.py - Python extension for perf script, 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


def taskState(state):
    states = {
        0 : "R",
        1 : "S",
        2 : "D",
        64: "DEAD"
    }

    if state not in states:
        return "Unknown"

    return states[state]


class EventHeaders:
    def __init__(self, common_cpu, common_secs, common_nsecs,
             common_pid, common_comm, common_callchain):
        self.cpu = common_cpu
        self.secs = common_secs
        self.nsecs = common_nsecs
        self.pid = common_pid
        self.comm = common_comm
        self.callchain = common_callchain

    def ts(self):
        return (self.secs * (10 ** 9)) + self.nsecs

    def ts_format(self):
        return "%d.%d" % (self.secs, int(self.nsecs / 1000))