From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- scripts/show_delta | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 scripts/show_delta (limited to 'scripts/show_delta') diff --git a/scripts/show_delta b/scripts/show_delta new file mode 100644 index 00000000000..48a706ab3d0 --- /dev/null +++ b/scripts/show_delta @@ -0,0 +1,129 @@ +#!/usr/bin/env python +# +# show_deltas: Read list of printk messages instrumented with +# time data, and format with time deltas. +# +# Also, you can show the times relative to a fixed point. +# +# Copyright 2003 Sony Corporation +# +# GPL 2.0 applies. + +import sys +import string + +def usage(): + print """usage: show_delta [] + +This program parses the output from a set of printk message lines which +have time data prefixed because the CONFIG_PRINTK_TIME option is set, or +the kernel command line option "time" is specified. When run with no +options, the time information is converted to show the time delta between +each printk line and the next. When run with the '-b' option, all times +are relative to a single (base) point in time. + +Options: + -h Show this usage help. + -b Specify a base for time references. + can be a number or a string. + If it is a string, the first message line + which matches (at the beginning of the + line) is used as the time reference. + +ex: $ dmesg >timefile + $ show_delta -b NET4 timefile + +will show times relative to the line in the kernel output +starting with "NET4". +""" + sys.exit(1) + +# returns a tuple containing the seconds and text for each message line +# seconds is returned as a float +# raise an exception if no timing data was found +def get_time(line): + if line[0]!="[": + raise ValueError + + # split on closing bracket + (time_str, rest) = string.split(line[1:],']',1) + time = string.atof(time_str) + + #print "time=", time + return (time, rest) + + +# average line looks like: +# [ 0.084282] VFS: Mounted root (romfs filesystem) readonly +# time data is expressed in seconds.useconds, +# convert_line adds a delta for each line +last_time = 0.0 +def convert_line(line, base_time): + global last_time + + try: + (time, rest) = get_time(line) + except: + # if any problem parsing time, don't convert anything + return line + + if base_time: + # show time from base + delta = time - base_time + else: + # just show time from last line + delta = time - last_time + last_time = time + + return ("[%5.6f < %5.6f >]" % (time, delta)) + rest + +def main(): + base_str = "" + filein = "" + for arg in sys.argv[1:]: + if arg=="-b": + base_str = sys.argv[sys.argv.index("-b")+1] + elif arg=="-h": + usage() + else: + filein = arg + + if not filein: + usage() + + try: + lines = open(filein,"r").readlines() + except: + print "Problem opening file: %s" % filein + sys.exit(1) + + if base_str: + print 'base= "%s"' % base_str + # assume a numeric base. If that fails, try searching + # for a matching line. + try: + base_time = float(base_str) + except: + # search for line matching string + found = 0 + for line in lines: + try: + (time, rest) = get_time(line) + except: + continue + if string.find(rest, base_str)==1: + base_time = time + found = 1 + # stop at first match + break + if not found: + print 'Couldn\'t find line matching base pattern "%s"' % base_str + sys.exit(1) + else: + base_time = 0.0 + + for line in lines: + print convert_line(line, base_time), + +main() + -- cgit v1.2.3