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      1 """
      2 readprofile - a tool to read kernel profiling information
      3 
      4 The readprofile command uses the /proc/profile information to print ascii data
      5 on standard output. The output is organized in three columns: the first is the
      6 number of clock ticks, the second is the name of the C function in the kernel
      7 where those many ticks occurred, and the third is the normalized `load' of the
      8 procedure, calculated as a ratio between the number of ticks and the length of
      9 the procedure. The output is filled with blanks to ease readability.
     10 """
     11 import os, shutil
     12 from autotest_lib.client.bin import utils, profiler
     13 from autotest_lib.client.common_lib import error
     14 
     15 class readprofile(profiler.profiler):
     16     version = 1
     17 
     18 # http://www.kernel.org/pub/linux/utils/util-linux/util-linux-2.12r.tar.bz2
     19     def setup(self, tarball = 'util-linux-2.12r.tar.bz2'):
     20         self.tarball = utils.unmap_url(self.bindir, tarball, self.tmpdir)
     21         utils.extract_tarball_to_dir(self.tarball, self.srcdir)
     22         os.chdir(self.srcdir)
     23 
     24         utils.configure()
     25         os.chdir('sys-utils')
     26         utils.make('readprofile')
     27 
     28 
     29     def initialize(self):
     30         self.job.require_gcc()
     31 
     32         try:
     33             utils.system('grep -iq " profile=" /proc/cmdline')
     34         except error.CmdError:
     35             raise error.AutotestError('readprofile not enabled')
     36 
     37         self.cmd = self.srcdir + '/sys-utils/readprofile'
     38 
     39 
     40     def start(self, test):
     41         utils.system(self.cmd + ' -r')
     42 
     43 
     44     def stop(self, test):
     45         # There's no real way to stop readprofile, so we stash the
     46         # raw data at this point instead. BAD EXAMPLE TO COPY! ;-)
     47         self.rawprofile = test.profdir + '/profile.raw'
     48         print "STOP"
     49         shutil.copyfile('/proc/profile', self.rawprofile)
     50 
     51 
     52     def report(self, test):
     53         args  = ' -n'
     54         args += ' -m ' + utils.get_systemmap()
     55         args += ' -p ' + self.rawprofile
     56         cmd = self.cmd + ' ' + args
     57         txtprofile = test.profdir + '/profile.text'
     58         utils.system(cmd + ' | sort -nr > ' + txtprofile)
     59         utils.system('bzip2 ' + self.rawprofile)
     60