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3.10.0-1062.9.1.el7.x86_64
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tracing
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Filename :
draw_functrace.pyc
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� � �]c @ s� d Z d d l Z d d l Z d d d � � YZ d e f d � � YZ d e f d � � YZ d � Z d � Z e d k r� e � n d S( sH Copyright 2008 (c) Frederic Weisbecker <fweisbec@gmail.com> Licensed under the terms of the GNU GPL License version 2 This script parses a trace provided by the function tracer in kernel/trace/trace_functions.c The resulted trace is processed into a tree to produce a more human view of the call stack by drawing textual but hierarchical tree of calls. Only the functions's names and the the call time are provided. Usage: Be sure that you have CONFIG_FUNCTION_TRACER # mount -t debugfs nodev /sys/kernel/debug # echo function > /sys/kernel/debug/tracing/current_tracer $ cat /sys/kernel/debug/tracing/trace_pipe > ~/raw_trace_func Wait some times but not too much, the script is a bit slow. Break the pipe (Ctrl + Z) $ scripts/draw_functrace.py < raw_trace_func > draw_functrace Then you have your drawn trace in draw_functrace i����Nt CallTreec B sG e Z d Z d Z d d d � Z d � Z d � Z d � Z d � Z RS( s� This class provides a tree representation of the functions call stack. If a function has no parent in the kernel (interrupt, syscall, kernel thread...) then it is attached to a virtual parent called ROOT. c C sC | | _ | | _ | d k r- t j | _ n | | _ g | _ d S( N( t _funct _timet NoneR t ROOTt _parentt _children( t selft funct timet parent( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt __init__# s c C s& t | | | � } | j j | � | S( s� If a function calls another one, call this method to insert it into the tree at the appropriate place. @return: A reference to the newly created child node. ( R R t append( R R t calltimet child( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt calls, s c C s` | } x+ | t j k r3 | j | k r3 | j } q W| t j k r\ t j j | d � } | S| S( s� Retrieve the last parent of the current node that has the name given by func. If this function is not on a parent, then create it as new child of root @return: A reference to the parent. N( R R R R R R ( R R t treeR ( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt getParent5 s ! c C s | j d t � S( Nt ( t _CallTree__toStringt True( R ( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt __repr__C s c C s� | j d k r+ d | | j | j f } n d | | j f } d } | r[ | d d } n x� | t | j � k r� | t | j � d k r� | d | j | j | d t � 7} n% | d | j | j | d t � 7} | d 7} q^ W| S( Ns %s----%s (%s) s %s----%s i i����t i s %ss |( R R R t lenR R t FalseR ( R t brancht lastChildt st i( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt __toStringF s N( t __name__t __module__t __doc__R R R R R R R ( ( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyR s t BrokenLineExceptionc B s e Z d Z RS( sy If the last line is not complete because of the pipe breakage, we want to stop the processing and ignore this line. ( R R R ( ( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyR! Y s t CommentLineExceptionc B s e Z d Z RS( sY If the line is a comment (as in the beginning of the trace file), just ignore it. ( R R R ( ( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyR" _ s c C ss | j � } | j d � r$ t � n t j d | � } | d k rK t � n | j d � | j d � | j d � f S( Nt #s" [^]]+?\] +([0-9.]+): (\w+) <-(\w+)i i i ( t stript startswithR" t ret matchR R! t group( t linet m( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt parseLinef s c C s� t d d d � t _ t j } xs t j D]h } y t | � \ } } } Wn% t k r[ Pn t k rn q( n X| j | � } | j | | � } q( Wt j GHd S( Ns Root (Nowhere)( R R R t syst stdinR+ R! R" R R ( R R) R t calleet caller( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt mainp s t __main__( ( R R, R& R t ExceptionR! R" R+ R0 R ( ( ( sM /usr/src/kernels/3.10.0-1062.9.1.el7.x86_64/scripts/tracing/draw_functrace.pyt <module> s >