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Annotation of hatari/tools/debugger/hatari_spinloop.py, revision 1.1.1.1

1.1       root        1: #!/usr/bin/env python
                      2: #
                      3: # Copyright (C) 2013 by Eero Tamminen
                      4: #
                      5: # This program is free software; you can redistribute it and/or modify
                      6: # it under the terms of the GNU General Public License as published by
                      7: # the Free Software Foundation; either version 2 of the License, or
                      8: # (at your option) any later version.
                      9: #
                     10: # This program is distributed in the hope that it will be useful,
                     11: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     13: # GNU General Public License for more details.
                     14: """
                     15: Usage: hatari_spinloop.py <filename>
                     16: 
                     17: Script for post-processing Hatari profiler looping information
                     18: produced by "profile loops <filename>" command, after profiling is
                     19: enabled with either "profile on" and/or "dspprofile on".
                     20: 
                     21: That Hatari command saves spinloop data for any CPU and DSP code inner
                     22: loop that spins for more than once.
                     23: 
                     24: This script gives counts on how many times loops were executed, how
                     25: many times they spinned at minimum and maximum, at which VBL those
                     26: happened, and what was the standard deviation of that.
                     27: 
                     28: Note: in some cases Hatari can list different sized spinloops for the
                     29: same loop (start) address. This can be because code changed, or outer
                     30: loop was sometimes repeated several times in succession without
                     31: repeating the inner loop.
                     32: """
                     33: 
                     34: import os, sys, math
                     35: 
                     36: 
                     37: class LoopItem:
                     38:     def __init__(self, addr, size):
                     39:         self.addr = addr
                     40:         self.size = size
                     41:         self.loops = []
                     42: 
                     43:     def add(self, count, vbl):
                     44:         self.loops.append((count, vbl))
                     45: 
                     46:     def stats(self):
                     47:         "return max + its VBL, min + its VBL, count of separate loops, stddev for them, loop addr & size"
                     48:         self.loops.sort()
                     49:         count = len(self.loops)
                     50:         if count > 1:
                     51:             mean = sum([x for x,y in self.loops]) / float(count)
                     52:             mean2 = sum([(x-mean)**2 for x,y in self.loops]) / float(count-1)
                     53:         else:
                     54:             mean2 = 0.0
                     55:         return (self.loops[-1][0], self.loops[-1][1],
                     56:                 self.loops[0][0], self.loops[0][1],
                     57:                 count, math.sqrt(mean2), self.addr, self.size)
                     58: 
                     59: 
                     60: def output(processors, write):
                     61:     for name, data in processors.items():
                     62:         write("\n%s loop statistics\n" % name)
                     63:         sorted = []
                     64:         for item in data.values():
                     65:             sorted.append(item.stats())
                     66:         sorted.sort()
                     67:         sorted.reverse()
                     68:         write("   max:\tat VBL:\t   min:\tat VBL:\ttimes:\tstddev:\taddr:\tsize:\n")
                     69:         for item in sorted:
                     70:             write("%7d\t%7d\t" % (item[0], item[1]))
                     71:             write("%7d\t%7d\t" % (item[2], item[3]))
                     72:             write("%7d\t%7.1f\t" % (item[4], item[5]))
                     73:             write(" %06x\t%6d\n" % (item[6], item[7]))
                     74: 
                     75: 
                     76: def parse(fname):
                     77:     "parse looping information from given file object"
                     78:     processors = {}
                     79:     for line in open(fname).readlines():
                     80:         if line[0] == '#':
                     81:             continue
                     82:         name, vbl, addr, size, count = line.split()
                     83:         if name not in processors:
                     84:             processors[name] = {}
                     85:         items = processors[name]
                     86:         addr = int(addr, 16)
                     87:         size = int(size)
                     88:         ident = (addr, size)
                     89:         if ident not in items:
                     90:             items[ident] = LoopItem(addr, size)
                     91:         items[ident].add(int(count), int(vbl))
                     92:     return processors
                     93: 
                     94: 
                     95: if __name__ == "__main__":
                     96:     if len(sys.argv) != 2 or not os.path.exists(sys.argv[1]):
                     97:         print __doc__
                     98:         sys.exit(1)
                     99:     data = parse(sys.argv[1])
                    100:     output(data, sys.stdout.write)

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