scripts/ccache-use-stat

   1 #!/usr/bin/python
   2
   3 import os, sys
   4
   5 def ccache_get_info(info):
   6         cmd = "ccache -s | awk '$1 == \"cache\" && $2 == \"%s\" { print $3 }'" % info
   7         num = int(os.popen(cmd).readline())
   8         return num
   9
  10 def ccache_get_all():
  11         hit = ccache_get_info("hit")
  12         miss = ccache_get_info("miss")
  13         return (hit, miss)
  14
  15 def compile(args):
  16         os.system("make " + args)
  17
  18 def report(args, hit_bef, miss_bef, hit_aft, miss_aft):
  19         header_size = 30
  20         lookups = (hit_aft + miss_aft) - (hit_bef + miss_bef)
  21         hits = hit_aft - hit_bef
  22         misses = miss_aft - miss_bef
  23         hits_per = (100.0 * hits) / lookups
  24         miss_per = (100.0 * misses) / lookups
  25
  26         print '-' * header_size
  27         print 'ccache usage report:\n'
  28         print 'cmd: make ' + args + '\n'
  29         print 'lookups: %5d' % lookups
  30         print 'hits   : %5d (%.1f%%)' % (hits, hits_per)
  31         print 'misses : %5d (%.1f%%)' % (misses, miss_per)
  32         print '-' * header_size
  33
  34 def main():
  35         args = ""
  36         if len(sys.argv) == 2:
  37                 args = sys.argv[1]
  38
  39         (hit_bef, miss_bef) = ccache_get_all()
  40         compile(args)
  41         (hit_aft, miss_aft) = ccache_get_all()
  42
  43         report(args, hit_bef, miss_bef, hit_aft, miss_aft)
  44         sys.exit(0)
  45
  46 if __name__ == "__main__":
  47         main()